CN109085661B - Method for analyzing mining potential of hydrous silicate type laterite-nickel ore - Google Patents
Method for analyzing mining potential of hydrous silicate type laterite-nickel ore Download PDFInfo
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Abstract
The invention discloses an analysis method for mining potential of hydrous silicate type laterite-nickel ore, belongs to the technical field of deep prospecting of hydrous silicate type laterite-nickel ore in southeast Asia, and aims to solve the problem that humus rock is not easy to penetrate in drilling of hydrous silicate type laterite-nickel ore deposit in southeast Asia, so that some laterite-nickel ore resources from the humus rock stratum to bedrock are lost. The method comprises the steps of determining the position of an ore deposit, carrying out element content assay on each ore layer passing through the drilling, judging the ore layer reached by the drilling operation, deducing the depth of the ore layer reached by the current drilling operation from a basal rock surface, judging the ore type of the hydrous silicate type laterite-nickel ore and selecting a subsequent smelting processing technology. According to the method, whether the drill hole is drilled to the bedrock can be judged according to the drill hole analysis, whether potential resources exist at the same depth of the deposit is further deduced, the total amount of resources of later mining projects is integrally estimated, and the resource development is more reasonably and comprehensively carried out.
Description
Technical Field
The invention belongs to the technical field of deep prospecting of hydrous silicate type laterite-type nickel ore in southeast Asia, and particularly relates to an analysis method for mining potential of hydrous silicate type laterite-type nickel ore
Background
Laterite type ore accounts for about 60% of the total nickel resource in the world, is mainly distributed near the equator, has the advantages of rich resources, low exploration cost and extremely low mining cost, can be divided into three types, namely hydrous silicate type ore deposit, clay silicate type ore deposit and oxidized ore deposit according to the characteristics of the ore, wherein the hydrous silicate type ore deposit is mainly distributed in the countries such as New Carlidonia, Indonesia, Philippines and the like.
The typical laterite-nickel ore has three differentiation zones which are a limonite layer, a decayed rock layer and a basal rock layer from top to bottom in sequence; however, the middle upper part of the decayed rock stratum comprises a soil-shaped decayed rock stratum and a soil block-shaped decayed rock stratum, the geological characteristics are complex, the understanding is not uniform, the middle upper part is simply divided into a transition zone in the prior art, the layered resource quantity and the occurrence state of main components are not clear, the selection of the next selection and smelting process is influenced, particularly the selection and smelting process of the nickel ore in the decayed rock zone is not reasonable, and the resource utilization rate is reduced.
In the prior art, in order to find out beneficial and harmful components in the laterite-nickel ore, elements such as nickel, cobalt, iron, aluminum, magnesium, silicon, sulfur, phosphorus and the like need to be tested one by one, but the laterite-nickel ore has large exploration engineering quantity, more exploration data and high test cost and exploration cost, but the deep-layer ore searching potential of the laterite-nickel ore is not well analyzed by utilizing element correlation, so that the resource waste is caused.
Therefore, a method is urgently needed, which can find out deep resource potential, more accurately mine deep laterite nickel resources, more reasonably divide ore-containing layers, accurately define resource quantity and provide technical support for next selection and metallurgy process selection by utilizing test data in the exploration process.
Disclosure of Invention
The invention aims to provide an analysis method for mining potential of hydrous silicate type laterite-nickel ore, and aims to solve the problem that the decayed rock is not easy to penetrate in drilling of hydrous silicate type laterite-nickel ore deposit in southeast Asia, so that some laterite-nickel ore resources from decayed rock stratum to bedrock are lost.
In order to solve the problems, the technical scheme of the invention is as follows:
an analysis method for mining potential of hydrous silicate type laterite-nickel ore is characterized by comprising the following steps: the method comprises the following steps:
step one, determining the position of an ore deposit:
preliminarily determining the general position of an ore body according to data information of early geophysical prospecting, chemical prospecting, well prospecting and drilling, systematically arranging a drilling project, performing geological logging, sampling, testing and analysis, and further finding out and determining the spatial position of an ore deposit;
step two, carrying out element content assay on each mineral layer drilled in the step one:
testing the contents of nickel, iron, cobalt and magnesium oxide in each ore layer by using the existing method, and sampling to perform rock and ore identification and mineral manufacturability analysis on the ores in each ore layer;
step three, judging the mineral layer reached by the drilling operation according to the content change of nickel, iron, cobalt and magnesium oxide in each mineral layer in the step two:
and according to the test result in the step two, accurately judging each mineral layer reached by the drilling operation, and sequentially from top to bottom: the rock-soil-type rock-soil composite material comprises an iron-containing covering layer, a limonite layer, a decayed rock layer and a bedrock layer, wherein the decayed rock layer comprises a soil-like decayed rock layer, a soil block-like decayed rock layer and a block-like decayed rock layer which are distributed from top to bottom, and the judgment basis is shown in table 1;
TABLE 1 test results for each material content and the corresponding mineral layer
When the nickel, iron, cobalt and magnesium oxide contents of a specific mineral layer reached by the drilling operation simultaneously satisfy the ranges in table 1, the lithology and rock location of the mineral layer can be judged as shown in the fifth column of table 1.
Fourthly, deducing the depth of the mineral layer reached by the current drilling operation from the bedrock face according to the reduction amplitude of the iron content in the rotten rock layer:
the relation between the actually measured iron content of the drill hole in the rotten rock stratum and the depth of the final hole position of the drill hole from the basal rock face is as follows:
lx is (Fex-BFemax) x (Ls) ÷ (SFemax-BFemax) formula 1;
the letters in the formula have the following meanings:
lx is the depth from the final hole position of the drilled hole to the surface of the bedrock;
fex is the measured value of the iron content of the corrosion rock stratum at the bottom of the drilled hole;
BFemax-maximum value of iron content of bedrock stratum;
SFemax-maximum iron content of formation;
ls-average thickness of decayed rock layer;
when the thickness Lx of the final hole position of the drill hole from the surface of the bedrock is more than or equal to 3m, the drill hole is drilled downwards continuously until Lx is less than or equal to 1 m;
when the thickness of the final hole position of the drilled hole from the base rock surface is not less than 1m and not more than 3m, judging according to the distribution change condition of the iron content of the decayed rock stratum of the adjacent drilled holes on site:
if the actual thickness of the rotten rock layer in 50% or more of the adjacent drill holes is larger than the average thickness Ls of the rotten rock layer or the calculated thickness Lx of the final hole position of the adjacent drill holes of 50% or more of the adjacent drill holes is larger than or equal to 3m from the surface of the bedrock, the drill holes still need to be drilled downwards;
if the actual thickness of the rotten rock layer in the adjacent drill holes below 50 percent is less than the average thickness Ls of the rotten rock layer or the calculated thickness Lx of the final hole position of the adjacent drill holes above 50 percent from the surface of the bedrock is less than or equal to 1m, the drill holes do not need to continue downwards;
when the thickness Lx between the position of the final hole of the drill hole and the surface of the foundation rock is less than or equal to 1m, the position of the final hole of the drill hole is close to the surface of the foundation rock, and the drill hole does not need to continue downwards.
Further, the method also comprises the following steps:
step five, judging the ore type of the hydrous silicate type laterite-nickel ore according to the content of the magnesium oxide in the decayed rock layer:
according to the current domestic investigation specifications, the industrial technical grade indexes of hydrous silicate type laterite-nickel ore can be divided according to the MgO content, and the industrial types of the ore are as follows:
when Y is more than 0 and less than 10 omega percent, the iron ore is used;
when Y is more than or equal to 10 and less than 20 omega percent, the iron-magnesium ore is obtained;
when Y is more than or equal to 20 and less than 30 omega percent, the magnesium ore is used;
step six, selecting a subsequent smelting process according to the contents of nickel, iron and magnesium oxide tested in the step two and the ore type of the hydrous silicate type laterite-nickel ore obtained in the step five, wherein the selection standard is as shown in Table 3:
TABLE 3 smelting process corresponding to each mineral layer of hydrous silicate type laterite-nickel ore
When a particular formation is reached by the drilling operation and the nickel, iron, and magnesium oxide contents of the formation satisfy the ranges in table 3, it is determined that the treatment process for the formation is suitable as shown in the rightmost column of table 3.
Further, the relationship between the average iron content and the average magnesia content of the decayed rock formation in the second step is as follows:
Y＝0.0000193X4-0.0023969X3+0.1079729X2-2.4617056X +32.66 formula 2;
in order to quickly calculate the content of magnesium oxide in the decayed rock stratum, the method is simplified as follows:
y-40.0483-1.0011 × X, wherein the letters have the following meanings:
y-magnesia content in the saprolite layer;
x-iron content in the decayed rock formation.
Further, the correlation between the iron element and the nickel element in the limonite layer in the step two accords with the following formula:
fe 125Ni-79.375 formula 3-1.
Further, the correlation between the iron element in the limonite layer and the magnesium oxide in the step two accords with the following formula:
fe-1.8861 MgO +49.1821 formula 3-2.
Further, in the second step, the correlation between the iron element and the nickel element in the soil rotten rock layer and the soil block rotten rock layer is in accordance with the following formula:
fe 66.6667Ni-98.33333 formula 4-1.
Further, in the second step, the correlation between the iron element and the magnesium oxide in the soil rotten rock layer and the soil block rotten rock layer is in accordance with the following formula:
fe ═ 3.060MgO +49.3727 formula 4-2.
The invention has the following beneficial effects:
(1) according to the method, a small amount of representative test data of the drill holes are utilized to accurately define the limonite layer and the decayed rock layer, including the earthy decayed rock, the shallow decayed rock and the bedrock, and the thickness between the position of the drill hole and the bedrock surface is calculated, so that whether the drill hole drills to the bedrock is judged, whether potential resources exist at the same depth of the ore deposit is further deduced, resources which cannot be completely controlled in an earlier mining project can be correspondingly mined in a next mining link, the resource waste is avoided, the overall social benefit of the project is improved, the total resource amount of a later mining project is integrally estimated, and the resource development is more reasonably and comprehensively carried out;
(2) the method judges the ore grade of the laterite-type nickel ore according to the content of magnesium in the humus rock layer, judges the occurrence forms of main minerals of nickel and cobalt in the ore according to the contents of nickel and cobalt elements in each ore layer and each ore layer, and selects the subsequent processing technology by combining the nickel and cobalt elements, thereby saving the testing cost and the testing time before smelting, reducing the cost, improving the smelting recovery rate and improving the comprehensive economic benefit;
(3) according to the method, a large amount of chemical examination work in the mining operation can be reduced according to the correlation of main substances in the limonite layer, the decayed rock layer and the basal rock layer, only one or two substances in the mining operation need to be analyzed according to the actual mining condition, and the rest substances can be obtained by calculation according to the empirical formulas of the formulas 3-1, 3-2, 4-1 and 4-2, so that a large amount of complicated chemical examination work is saved, a large amount of manpower and material resource cost is saved, and the mining efficiency is also improved.
The present invention will be described in further detail with reference to specific examples.
Example 1
Step one, determining the position of an ore deposit:
the method comprises the following steps of firstly determining the general position of an ore body according to early geophysical prospecting, chemical prospecting, well prospecting and drilling data information of a first laterite nickel ore which is located in the northeast of Indonesia, is located in the south of SubaYicun of the northeast Hama province of the North Marigold, carrying out geological recording, sampling and test analysis by a system arrangement drilling project, and further finding out and determining the spatial position of an ore deposit: the ore area is positioned at the joint of the northern slope of the main peak of Wawa mountain and Subayin river alluvial plain, the terrain is relatively gentle, the plane position is between 114000-117000 of north coordinates, 403000-405000 of east coordinates, the occurrence elevation of an ore body is 50-400 m, the area of the ore body is about 4.85km2, the ore deposit is produced at the middle upper part of a lateritic weathered shell (namely a decayed rock layer) at the top of the ultrabasic rock body, and the distribution range of the nickel ore body is basically consistent with the distribution of the lateritic weathered shell.
Step two, carrying out element content assay on each mineral layer drilled in the step one:
adopting AAS (atomic absorption spectrometry), namely, testing the contents of nickel, iron, cobalt and magnesium oxide in each ore layer, and randomly extracting samples in each drill hole according to layers according to the analysis requirement of mineral technology to perform rock and ore identification and mineral technology analysis so as to find out the mineral components of each layer;
6661 drill holes are formed in the first laterite-nickel ore, the data set is huge, and only 4 representative drill holes are selected according to the results of layered detection:
TABLE 1-1 first laterite-nickel ore sample 1 analytical results
Tables 1-2 first laterite-nickel ore sample 2 analysis results
Tables 1-3 first laterite-nickel ore sample 3 analysis results
Tables 1-4 first laterite-nickel ore sample 4 analysis results
Step three, judging the mineral layer reached by the drilling operation according to the content change of nickel, iron, cobalt and magnesium oxide in each mineral layer in the step two:
and (3) verifying the mineral seam reached by the drilling operation, comparing the contents of nickel, iron, cobalt and magnesium oxide and the ore types in the tables 1-1, 1-2, 1-3 and 1-4 with the ranges of nickel, iron, cobalt and magnesium oxide, lithology and rock positions in the table 1 respectively, and verifying that the mineral seam judged in the table 1 is correct and has universality.
Fourthly, deducing the depth of the mineral layer reached by the current drilling operation from the bedrock face according to the reduction amplitude of the iron content in the rotten rock layer:
in the statistical data of 6661 drill holes of the first laterite-nickel ore, the average thickness Ls of a decaying rock stratum is 21m, and the average chemical composition of each ore stratum and the maximum value of the iron content of partial ore strata are shown in tables 1-5:
tables 1-5 average chemical composition of each ore layer and maximum iron content of partial ore layer of first laterite-nickel ore
Tables 1-5 show: the maximum value BFemax of the iron content in the bedrock layer is 5.82 ω%, the maximum value SFemax of the iron content in the corrosion rock layer is 45.10 ω%, and Ls is 21m in this example;
the rule is summarized and found that: the depth relation between the position of the final hole of the drill hole and the surface of the bedrock is as follows:
lx is (Fex-BFemax) x (Ls) ÷ (SFemax-BFemax) formula 1;
the letters in the formula have the following meanings:
lx is the depth from the final hole position of the drilled hole to the surface of the bedrock;
fex is the measured value of the iron content of the corrosion rock stratum at the bottom of the drilled hole;
BFemax-maximum value of iron content of bedrock stratum;
SFemax-maximum iron content of formation;
ls-average thickness of decayed rock layer;
the following is a verification of the universality of formula 1:
(1) the 16 th time result of the drilling with the engineering number ZK12-2 of the first laterite-nickel ore sample 4 is used for verification: the Fex is 17.5 omega%, and the depth relation between the position of the final hole of the drill hole and the surface of the foundation rock is as shown in the formula 1:
Lx＝(Fex-BFemax)×(Ls)÷(SFemax-BFemax)；
data are substituted, Fex ═ 17.5 ω%; BFemax ═ 5.82 ω%; SFemax 45.10 ω%; ls is 21 m;
and (3) obtaining that Lx is more than or equal to 6.28m and more than or equal to 3m, and still continuing to drill downwards, and during the operation of drilling downwards, confirming that the laterite-nickel ore still exists in the ore layer below.
(2) The 24 th time result of the drilling of the first laterite-nickel ore sample 4 with the engineering number ZK12-2 is used for verification: the Fex is 7.72 omega%, and the depth relation between the position of the final hole of the drill hole and the surface of the foundation rock is as shown in the formula 1:
lx is (Fex-BFemax) x (Ls) ÷ (SFemax-BFemax) formula 1;
data are substituted, Fex ═ 7.72 ω%; BFemax ═ 5.82 ω%; SFemax 45.10 ω%; ls is 21 m;
obtaining Lx of which the thickness is more than or equal to 1m and less than or equal to 1.02m and less than or equal to 3m, and judging according to the iron content distribution change condition of the decayed rock stratum of the adjacent boreholes in the field:
according to the condition that adjacent drill holes are arranged on the periphery of the drill hole with the engineering number of ZK12-2 of the first laterite-nickel ore sample 4, the actual thickness of a decayed rock layer in more than 50% of the adjacent drill holes is more than Ls, downward drilling still needs to be continued, and in the operation of downward drilling, the 25 th drilling result also proves that laterite-nickel ore still exists in a lower ore layer.
(3) The 25 th time result of the drilling with the engineering number ZK12-2 of the first laterite-nickel ore sample 4 is used for verification: the Fex is 7.68 omega%, and the depth relation between the position of the final hole of the drill hole and the surface of the foundation rock is as shown in the formula 1:
lx is (Fex-BFemax) x (Ls) ÷ (SFemax-BFemax) formula 1;
data are substituted, Fex ═ 7.68 ω%; BFemax ═ 5.82 ω%; SFemax 45.10 ω%; ls is 21 m;
obtaining Lx as 1m, and judging according to the iron content distribution change condition of the decayed rock stratum of the adjacent boreholes in the field:
according to the condition that adjacent drill holes are arranged on the periphery of the drill hole with the engineering number ZK12-2 of the first laterite-nickel ore sample 4, the actual thickness of a decayed rock layer is larger than Ls in more than 50% of the adjacent drill holes, downward drilling still needs to be continued, and in the operation of downward drilling, the 26 th drilling result shows that the basal rock layer is not reached temporarily.
In the practical operation, the results of the 24 th and 25 th rounds are combined, the Lx calculated values of the two rounds are close to the critical value, the two rounds of drilling is close to the foundation stratum according to the working experience, and the point is proved by further drilling in depth afterwards.
(4) The verification is carried out by using the 26 th result of the drilling hole of a first laterite-nickel ore sample 4 with the engineering number of ZK 12-2: the Fex is 7.28 omega%, and the depth relation between the position of the final hole of the drilling hole and the surface of the bedrock is as follows:
Lx＝(Fex-BFemax)×(Ls)÷(SFemax-BFemax)；
data are substituted, Fex ═ 7.28 ω%; BFemax ═ 5.82 ω%; SFemax 45.10 ω%; ls is 21 m;
obtaining Lx which is 0.78m, wherein the data Lx is less than or equal to 1m, the position of the final hole of the drill hole is close to the surface of the bedrock, and the drill hole does not need to go downwards continuously; in the re-drill down operation, the 27 th round drilling result also confirms that the underlying formation has reached the bed.
The method is used for verifying the sample 2, the drill hole with the engineering number of QJ11-5, the sample 3 and the drill hole with the engineering number of ZK10-1-4 respectively in sequence, the verification can be easily carried out, the formula 1 is used as an empirical formula to calculate and predict the mining potential and the actual drilling result are consistent, and the relation between the actually measured iron content of the drill hole and the depth of the final hole position of the drill hole from the basal rock face, namely the depth of the ore deposit, namely the mining potential is generally known.
Specifically, the 27 th round results of the drill hole with the engineering number of QJ10-1, which is the sample 1, are selected for verification: the Fex is 7.98 omega%, and the depth relation between the position of the final hole of the drill hole and the surface of the bedrock is as shown in the formula 1:
lx is (Fex-BFemax) x (Ls) ÷ (SFemax-BFemax) formula 1;
data are substituted, Fex ═ 7.98 ω%; BFemax ═ 5.82 ω%; SFemax 45.10 ω%; ls is 21 m;
obtaining Lx of which the thickness is more than or equal to 1m and less than or equal to 1.16m and less than or equal to 3m, and judging according to the iron content distribution change condition of the decayed rock stratum of the adjacent boreholes in the field:
according to the condition that adjacent drill holes are arranged on the periphery of the drill hole with the engineering number of ZK12-2 of the first laterite-nickel ore sample 4, the actual thickness of a decayed rock layer in more than 50% of the adjacent drill holes is larger than Ls, downward drilling still needs to be continued, and in the operation of downward drilling, the 28 th-time drilling result shows that a lower ore layer is a basal rock layer.
In the verification process, partial results of points which are at the junction of the rotten rock layer and the base rock layer and are at a certain turn as shown in the sample 1 are not met, but the drilling operation is layered, each sample is 1m in length, the rotten rock layer above and the base rock layer below are simultaneously contained in the 1m, and whether the samples are close to the base rock layer or not can be drilled according to the working experience by combining the adjacent data results and the adjacent drilling point condition table in comprehensive analysis in the actual operation, and then, the point is proved by a large amount of continuous deep drilling.
It should be noted that the empirical formula has universality, but also allows a special result to jump off, in the verification of a large amount of data of the first laterite nickel ore, the universality of the formula 1 is good, in the embodiment, the sample 1 is selected, the drill hole with the engineering number of QJ10-1 is not because the occurrence frequency of similar drill holes is high and representative, but because a small amount of similar drill holes exist, the explanation is easy in practice, the distribution of ore layers is not fixed in shape, and randomness also exists on a regular basis, and as long as the universality of the formula 1 is good, a good guidance can be given to the prediction of the depth of the ore bed in the actual operation.
Step five, judging the ore type of the hydrous silicate type laterite-nickel ore according to the content of the magnesium oxide in the decayed rock layer:
the rule is summarized and found that: the average iron content and the average magnesia content of the decayed rock formation are related as follows:
y is 40.0483-1.0011X formula 2,
the letters in the formula have the following meanings:
y-magnesia content in the saprolite layer;
x-iron content in the decayed rock layer;
the following is a verification of the universality of equation 2:
the average iron content data in each ore layer of the decayed rock layers in the tables 1 to 5 are respectively substituted into the formula 2, the calculation result is compared with the average magnesium oxide content in each ore layer of the decayed rock layers in the tables 1 to 5, and the ore technical grade of each ore layer in the embodiment is divided according to the MgO content (namely Y value) according to the current domestic survey specification, and the results are as follows:
when the content of X is 33.16 omega% in the soil rotten rock stratum, the content of Y is 6.85 omega%, the measured value is 6.49 omega%, the content is basically close to that, Y is more than 0 and less than 10 omega%, and the soil rotten rock stratum is iron ore;
when X is 21.52 omega% in the soil block rotten rock stratum, Y is 18.51 omega%, the measured value is 19.18 omega%, the method is basically approximate, and Y is more than or equal to 10 and less than 20 omega%, and the soil block rotten rock stratum is ferriferous ore;
when X is 11.77 ω% in the decomposed rock mass, Y is 28.27 ω%, and the measured value is 28.01 ω%, which is almost close to Y of 20 ≦ Y <30 ω%, and is a magnesium ore.
In summary, the calculated average value and the measured average value of magnesium oxide in the three ore layers of the soil-shaped rotten rock layer, the soil-block-shaped rotten rock layer and the block-shaped rotten rock layer contained in the rotten rock layer in the formula 2 are within the range allowed by empirical estimation, and the formula 2 proves that the universality of the rotten rock layer is good.
Step six, selecting a subsequent smelting process according to the average chemical components of each mineral layer in the tables 1-5 and the ore type of the hydrous silicate type laterite-nickel ore obtained in the step five:
wherein in the limonite layer: 0.6 omega% < Ni 0.86 omega% <1.5 omega%, 40 omega% < Fe 45.77 omega% <50 omega%, 0.5< MgO 1.67 omega% <4, adopting wet acid leaching process;
wherein in the earthy rotten rock layer: 0.6 omega% < Ni 1.31 omega% <4.77 omega%, <25 omega% < Fe 33.16 omega% <45 omega%, 1.5 omega% < MgO 6.49 omega% <10 omega%, and adopting reduction roasting-ammonia leaching process or wet acid leaching process;
wherein in the earthy rotten rock layer: 0.7 omega% < Ni 1.60 omega% <7.23 omega%, <10 omega% < Fe 21.52 omega% <30 omega%, and <10 > MgO 19.18 omega% <20, and adopting a pyrometallurgical process or a reduction roasting-ammonia leaching process;
wherein in the massive rotting rock layer: 0.9 omega% < Ni 1.07 omega% <6.94 omega%, 5 omega% < Fe 11.77 omega% <25 omega%, and 20< MgO 28.01 omega% <30 by a pyrometallurgical process.
The first laterite-nickel ore mining and later-stage processing result shows that:
the nickel mineral in the limonite layer is mainly goethite, and is processed by adopting a wet acid leaching process to mainly produce a nickel hydroxide cobalt product, wherein the process can extract 92.0 percent of nickel and 91.1 percent of iron in actual processing
The nickel minerals in the earthy rotten rock stratum are mainly nontronite, manganese-containing cobalt soil ore, nickel-containing smectite and nickel-magnesium smectite, a reduction roasting-ammonia leaching process is adopted, ferronickel products are mainly produced, and 95.9% of nickel and 100% of iron can be extracted and extracted by the process in actual processing;
in conclusion, it can be seen that: the actual process is consistent with the inferred process in the table 3, the product extraction efficiency is high, and the conclusion in the table 3 is proved to be correct.
Example 2
Step one, determining the position of an ore deposit:
the second laterite-nickel ore located 15km northeast of the old islands of the cotton-orchid, philippine (Mindanao) Surigao, according to the data of early geophysical prospecting, chemical prospecting, well prospecting and drilling, the general position of the ore body is preliminarily determined, the system is arranged in a drilling project, geological logging, sampling and test analysis are carried out, and the spatial position of the ore deposit is further found and determined: the mining area is located in Luda Wanwanfan (Lutawon) in the north of the Nuo Ke island, the geographic coordinates of the mining area are located in 125 degrees and 38 degrees of east longitude, 9 degrees and 51 degrees of north latitude, the plane position is between 1086000 and 1093000 and the east coordinate is between 56300000 and 576000, the occurrence elevation of the ore body is 70-280 meters, and the area of the mining area is about 43.72km2The mineral deposit is produced on the middle upper part of a weathered-semiweathered olivine layer (decayed rock layer) in a laterite weathered shell at the top of a super-basic rock (dunite, pyroxene olivine, pyroxene and serpentine), and laterite ore containing nickel, cobalt and iron is closely related to serpentine.
Step two, carrying out element content assay on the limonite layer drilled in the step one:
adopting AAS (atomic absorption spectroscopy), namely, testing the contents of nickel, iron, cobalt and magnesium oxide in the limonite layer, randomly extracting 3-6 samples in each drill hole according to the limonite layer according to the analysis requirement of mineral technology, and carrying out rock ore identification and mineral technology analysis to find out the mineral components of the limonite layer;
meanwhile, the content of the nickel element in the limonite layer is calculated according to the correlation formula of the iron element and the nickel element in the limonite layer given in the formula 3-1, the content of the magnesium oxide in the limonite layer is calculated according to the formula 3-2, the calculated value is compared with an actual measured value, and the universality of the formulas 3-1 and 3-2 is verified.
123624 holes are drilled in the second laterite-nickel ore, the data set is huge, and the average chemical composition of four main components of each ore layer is shown in a table 2-1:
TABLE 2-1 average chemical composition of each mineral layer of the second laterite-nickel ore
| Lithologic type | Number of samples | Ni(ω％) | Co(ω％) | TFe(ω％) | MgO(ω％) |
| Layer of limonite | 38901 | 1.07 | 0.13 | 45.19 | 1.09 |
| Soil-like rotten rock layer | 38861 | 1.21 | 0.10 | 35.7 | 7.84 |
| Soil block-shaped rotten rock layer | 26753 | 1.57 | 0.06 | 20.82 | 18.46 |
| Massive rotten rock layer | 17620 | 1.34 | 0.04 | 13.65 | 27.45 |
| Weak weathering olivary bedrock | 1489 | 0.33 | 0.01 | 4.98 | 37.65 |
In this example, only 8 representative boreholes were selected to list the results of limonite layer testing and calculations.
Table 2-2 second lateritic nickel ore sample 1 analysis results
Tables 2-3 second laterite-nickel ore sample 2 analysis results
Tables 2-4 second lateritic nickel ore sample 3 analysis results
Tables 2-5 second lateritic nickel ore sample 4 analysis results
Tables 2-6 second lateritic nickel ore sample 5 analysis results
Tables 2-7 second lateritic nickel ore sample 5 analysis results
Tables 2-8 second laterite-nickel ore sample 5 analysis results
Tables 2-9 second laterite-nickel ore sample 5 analysis results
Step three, verifying the mineral bed reached by the drilling operation according to the content change of nickel, iron, cobalt and magnesium oxide in the limonite bed in the step two:
according to the test result in the second step, the mineral layer reached by the drilling operation is verified, the contents of nickel, iron, cobalt and magnesium oxide in the tables 2-2, 2-3, 2-4, 2-5, 2-6, 2-7, 2-8 and 2-9 and the ore types are compared with the ranges, lithologies and rock positions of nickel, iron, cobalt and magnesium oxide in the limonite layer in the table 1 respectively, and the comparison shows that: when the contents of nickel, iron, cobalt and magnesium oxide in the table accord with corresponding intervals in the table 1, the actual ore types are the same as the lithology and horizon determined in the table 1, and the table 1 is verified to have universality in a limonite layer;
comparing the contents of nickel, iron, cobalt and magnesium oxide in tables 2-2, 2-3, 2-4, 2-5, 2-6, 2-7, 2-8 and 2-9 with the calculated values of nickel and magnesium oxide calculated according to formulas 3-1 and 3-2, the matching degree between the measured values and the calculated values is found to be good, and comparing the calculated values of nickel and magnesium oxide with the ranges of nickel, iron, cobalt and magnesium oxide of the limonite layer in table 1, the conclusion that the comparison is the same as the comparison between the measured values of nickel, iron, cobalt and magnesium oxide can be obtained, and the general applicability of formulas 3-1 and 3-2 in the limonite layer is verified to be good.
The calculated values and the measured values of magnesium oxide of the samples with the sample number 2 in tables 2-8 and the samples with the sample number 1 in tables 2-9 are different, but the data belong to a very small number of trip data and are not representative in the whole data collection, and the selected examples are not universal, but are used for explaining that a few data with large errors exist in the actual operation, and the data with obvious errors are removed in the actual operation.
Step four, since the ore bed concerned by the embodiment is only the limonite bed, and the step of deducing the depth of the ore bed reached by the current drilling operation from the bedrock surface according to the reduction amplitude of the iron content in the decayed rock bed does not belong to the verification category of the embodiment, so that the step is omitted.
Step five, because the ore layer concerned by the embodiment only lies in the limonite layer, the step of judging the ore type of the hydrous silicate type laterite-nickel ore according to the content of the magnesium oxide in the humus rock layer does not belong to the verification category of the embodiment, and the step is omitted.
Step six, selecting a smelting processing technology for the limonite layer of the second laterite-nickel ore according to the contents of nickel, iron and magnesium oxide tested in the step two:
wherein in the limonite layer: selecting wet acid leaching process from 0.6 omega% Ni 1.07 omega% 1.5 omega%, 40 omega% Fe 45.19 omega% 50 omega%, 0.5 MgO 1.09 omega% 4;
the second laterite-nickel ore mining and post-processing results show that the nickel mineral in the limonite layer of the ore is mainly goethite (Geothite), 96% of nickel and 95.5% of cobalt can be extracted by processing the limonite ore through a high-pressure acid leaching process, the actual process is consistent with the deducing process in the table 3, the product extraction efficiency is high, and the conclusion in the table 3 is proved to be correct.
Example 3
Step one, determining the position of an ore deposit:
the Brgy Massin of the New Bankson island in Bruks Bonet, Central and south of the Philippine Brachyme province, as the second laterite nickel ore, preliminarily determines the general position of the ore body according to the data information of early geophysical prospecting, chemical prospecting, well prospecting and drilling, systematically arranges drilling engineering, carries out geological logging, sampling, test analysis, and further finds out and determines the spatial position of the ore deposit: mine right area center coordinates: 8 degrees of north latitude 56 '47.428' and 117 degrees of east longitude 53 '47.500', the mining area is in the hilly land of the foot of Mantalingahan mountain, the northern part of the mining area is a steeply inclined ridge, the mining area has an elevation of 75-500 m and a mining area of 28.35km2The mineral deposit is mainly produced from olivine, mainly dunite and glauberite, wherein the dunite and the glauberite are subjected to different degrees of serpentine and silicification, and the middle part of the mineral area is seriously weathered, but sometimes chromite is found and gabby rock is also found.
Step two, carrying out element content assay on the decayed rock stratum drilled in the step one:
adopting AAS (atomic absorption spectrometry), namely, testing the contents of nickel, iron, cobalt and magnesium oxide in the decayed rock stratum, randomly extracting 9-25 samples according to the decayed rock stratum in each drill hole according to the analysis requirement of mineral technology, and carrying out rock and ore identification and mineral technology analysis to find out the mineral components of the decayed rock stratum;
meanwhile, the content of the nickel element in the decayed rock stratum is calculated according to a correlation formula of the iron element and the nickel element in the decayed rock stratum given in a formula 4-1, the content of the magnesium oxide in the decayed rock stratum is calculated according to a correlation formula of the iron element and the magnesium oxide in the decayed rock stratum given in a formula 4-2, and the calculated value is compared with an actual measured value to verify the universality of the formulas 4-1 and 4-2;
73548 holes are drilled in the second laterite nickel ore, the data set is huge, and only 5 representative holes are selected in the embodiment and listed according to the detection result of the decayed rock stratum.
TABLE 3-1 third laterite-nickel ore sample 1 analytical results
Table 3-2 third lateritic nickel ore sample 2 analysis results
Table 3-3 third laterite-nickel ore sample 3 analysis results
Table 3-4 third laterite-nickel ore sample 4 analysis results
Tables 3-5 third laterite-nickel ore sample 5 analysis results
Step three, verifying the mineral bed reached by the drilling operation according to the content change of nickel, iron, cobalt and magnesium oxide in the limonite bed in the step two:
according to the test result in the second step, the mineral layer reached by the drilling operation is verified, the contents of nickel, iron, cobalt and magnesium oxide in the tables 3-1, 3-2, 3-3, 3-4 and 3-5 and the ore types are respectively compared with the ranges, lithology and rock position of nickel, iron, cobalt and magnesium oxide in the table 1, and the comparison shows that: when the contents of nickel, iron, cobalt and magnesium oxide in the table accord with corresponding intervals in the table 1, the actual ore types are the same as the lithology and horizon determined in the table 1, and the table 1 is verified to have universality in the soil rotten rock layer and the soil block rotten rock layer;
comparing the contents of nickel and magnesium oxide in tables 3-1, 3-2, 3-3, 3-4 and 3-5 with calculated values of nickel and magnesium oxide calculated according to formulas 4-1 and 4-2, finding that the coincidence degree between the measured values and the calculated values is good, and comparing the calculated values of nickel and magnesium oxide with the ranges of nickel, iron, cobalt and magnesium oxide of the limonite layer in table 1, the conclusion same as the comparison between the measured values of nickel, iron, cobalt and magnesium oxide can be obtained, and verifying that formulas 4-1 and 4-2 have good universality in the soil rotten rock layer and the soil block rotten rock layer;
meanwhile, when the nickel, iron, cobalt and magnesium oxide contents of the blocky rotten rock layer and the bedrock layer in the tables 3-1, 3-2, 3-3, 3-4 and 3-5 conform to the component ranges in the table 1, the rock layer and rock position obtained by judgment conform to the actually measured ore type, and the table 1 is proved to have universality in the blocky rotten rock layer and the bedrock layer.
In the above, the difference between the calculated value and the measured value of magnesium oxide of the sample number 17 in table 3-1 and the sample number 17 in table 3-4 results in the difference between the calculated value and the measured value of magnesium oxide, which is determined according to table 1, and the type of the ore layer and rock level and the measured ore, but such data belongs to a very small number of trip data, which is not representative in the whole data collection, and the data is not generalized in the selected embodiment, but is used to illustrate that there are a few data with large errors in the actual operation, and the data with obvious errors in the actual operation is removed.
Fourthly, deducing the depth of the mineral layer reached by the current drilling operation from the bedrock face according to the reduction amplitude of the iron content in the rotten rock layer:
in the statistical data of the drilled holes of the third laterite-nickel ore 73548, the average thickness Ls of a decayed rock layer is 13m, and the average chemical composition of each ore layer and the maximum value of the iron content of partial ore layers are shown in tables 3-6:
tables 3-6 mean chemical composition of each mineral layer and maximum iron content of partial mineral layer of third laterite-nickel ore
Tables 1-5 show: the maximum value BFemax of the iron content of the bedrock layer is 6 omega, and the maximum value SFemax of the iron content of the decayed rock layer is 45 omega.
The rule is summarized and found that: the depth relation between the position of the final hole of the drill hole and the surface of the bedrock is as follows:
lx is (Fex-BFemax) x (Ls) ÷ (SFemax-BFemax) formula 1;
the letters in the formula have the following meanings:
lx is the depth from the final hole position of the drilled hole to the surface of the bedrock;
fex is the measured value of the iron content of the corrosion rock stratum at the bottom of the drilled hole;
BFemax-maximum value of iron content of bedrock stratum;
SFemax-maximum iron content of formation;
ls-average thickness of decayed rock layer;
the following is a verification of the universality of formula 1:
(1) and (3) verifying the 21 st result of the drilling hole with the engineering number of IDH-25N-15E by using a third laterite-nickel ore sample 1: the Fex is 10.17 omega%, and the depth relation between the position of the final hole of the drill hole and the surface of the foundation rock is as shown in the formula 1:
Lx＝(Fex-BFemax)×(Ls)÷(SFemax-BFemax)；
data are substituted, Fex ═ 10.17 ω%; BFemax is 6 omega; SFemax is 45 ω%; ls is 13 m;
obtaining that Lx is more than or equal to 1m and less than or equal to 1.39m and less than or equal to 3m, and judging according to the iron content distribution change condition of the decayed rock stratum of the adjacent boreholes in the field:
according to the third laterite-nickel ore sample 1, the adjacent drill holes on the periphery of the drill holes with the engineering number of IDH-25N-15E are more than 50 percent of the actual thickness of the decayed rock layer is more than Ls, downward drilling is still continued, and in the operation of downward drilling, the 22 nd round drilling result also proves that laterite-nickel ore still exists in the ore layer below;
similarly, the same is true for verification of the 25 th, 26 th and 27 th drilling results;
and (3) verifying the 33 rd time result of the drilling hole with the engineering number of IDH-25N-15E by using a third laterite-nickel ore sample 1: the Fex is 8.89 omega%, and the depth relation between the position of the final hole of the drill hole and the surface of the foundation rock is as shown in the formula 1:
Lx＝(Fex-BFemax)×(Ls)÷(SFemax-BFemax)；
data are substituted, Fex ═ 8.89 ω%; BFemax is 6 omega; SFemax is 45 ω%; ls is 13 m;
obtaining that Lx is 0.96m or less than 1m, the position of the final hole of the drill hole is close to the surface of the bedrock, and the drill hole does not need to continue downwards; in the re-drill down operation, the 34 th pass also confirms that the underlying formation has reached the bed.
(2) And (3) verifying the 13 th time result of the drilling hole with the engineering number of IDH-32N-17E by using a third laterite-nickel ore sample: its Fex is 15.5 ω%; the depth relation between the position of the final hole of the drill hole and the surface of the foundation rock is as shown in formula 1:
Lx＝(Fex-BFemax)×(Ls)÷(SFemax-BFemax)；
data are substituted, Fex 15.5 ω%; BFemax is 6 omega; SFemax is 45 ω%; ls is 13 m;
obtaining Lx which is 3.17m, wherein the data is more than or equal to 3m, drilling downwards still, and in the operation of drilling downwards, the 14 th drilling result also proves that laterite-nickel ore still exists in the ore layer below;
similarly, the 14 th and 15 th verification passes both conform to the conclusion of the formula 1;
the 14 th test result of the sample shows that the iron content is suddenly increased, which is also a phenomenon existing in practical operation, but the sample still satisfies the formula 1, and the universality of the formula 1 is further proved.
(3) Verifying the result of the 22 nd round of drilling of a third laterite-nickel ore sample 5 with the engineering number of IDH +14N-75E, wherein Fex is 9.25 omega; the depth relation between the position of the final hole of the drill hole and the surface of the foundation rock is as shown in formula 1:
Lx＝(Fex-BFemax)×(Ls)÷(SFemax-BFemax)；
data are substituted, Fex ═ 9.25 ω%; BFemax is 6 omega; SFemax is 45 ω%; ls is 13 m;
obtaining 1m and Lx which are equal to or less than 1.08m and equal to or less than 3m, wherein the data is between 1m and 3m, and the judgment is carried out according to the iron content distribution change condition of the decayed rock stratum of the adjacent boreholes in the field:
according to the third laterite-nickel ore sample 5, the peripheral adjacent drilling situation of the drilling holes with the engineering number of IDH +14N-75E, the thickness Lx of the final hole position to the bedrock surface is calculated to be more than 50% of the adjacent drilling holes, the drilling holes are unnecessarily drilled downwards, and the 23 rd drilling result also proves that the lower ore layer is the bedrock layer.
In the verification of a large amount of data of the third laterite-nickel ore, the universality of the formula 1 is good.
Step five, judging the ore type of the hydrous silicate type laterite-nickel ore according to the content of the magnesium oxide in the decayed rock layer:
the rule is summarized and found that: the average iron content and the average magnesia content of the decayed rock formation are related as follows:
y is 40.0483-1.0011X formula 2,
the letters in the formula have the following meanings:
y-magnesia content in the saprolite layer;
x-iron content in the decayed rock layer;
the following is a verification of the universality of equation 2:
the average iron content data in each ore layer of the decayed rock layers in tables 3 to 6 are respectively substituted into formula 2, the calculated results are compared with the average magnesium oxide content in each ore layer of the decayed rock layers in tables 1 to 5, and the ore technical grades of each ore layer in the embodiment are divided according to the MgO content (namely Y value) according to the current domestic survey specification, and the results are as follows:
when X is 34.05 omega% in the soil rotten rock stratum, Y is 5.96 omega%, the measured value is 5.32 omega%, the value is basically close to that, Y is more than 0 and less than 10 omega%, and the soil rotten rock stratum is iron ore;
when X is 22.91 omega% in the soil block-shaped rotten rock stratum, Y is 17.11 omega%, the measured value is 17.6 omega%, the method is basically approximate, and Y is more than or equal to 10 and less than 20 omega%, and the soil block-shaped rotten rock stratum is ferriferous ore;
when X is 15.3 ω% in the decomposed rock mass, Y is 24.73 ω%, and the measured value is 24.79 ω%, which is almost close to Y of 20 ≦ Y <30 ω%, and which is a magnesium ore.
In summary, the calculated average value and the measured average value of magnesium oxide in the three ore layers of the soil-shaped rotten rock layer, the soil-block-shaped rotten rock layer and the block-shaped rotten rock layer contained in the rotten rock layer in the formula 2 are within the range allowed by empirical estimation, and the formula 2 proves that the universality of the rotten rock layer is good.
Step six, selecting the subsequent smelting process according to the average chemical components of each mineral layer in the tables 3-6 and the ore type of the hydrous silicate type laterite-nickel ore obtained in the step five:
wherein in the earthy rotten rock layer: 0.6 omega% < Ni 1.35 omega% <4.77 omega%, 25 omega% < Fe 34.05 omega% <45 omega%, 1.5 omega% < MgO 5.32 omega% <10 omega%, and adopting reduction roasting-ammonia leaching process or wet acid leaching process;
wherein in the earthy rotten rock layer: 0.7 omega% < Ni 1.48 omega% <7.23 omega%, <10 omega% < Fe 22.91 omega% <30 omega%, and <10 > MgO 17.6 omega% <20 by adopting a pyrometallurgy process or a reduction roasting-ammonia leaching process;
wherein in the massive rotting rock layer: 0.9 omega% < Ni 1.32 omega% <6.94 omega%, 5 omega% < Fe 15.30 omega% <25 omega%, 20< MgO 24.79 omega% <30, and adopting a pyrometallurgical process.
The results of the third laterite-nickel ore mining and later-period processing show that:
the iron ore of the earthy rotten rock stratum at the middle upper part is suitable for producing a nickel cobalt hydroxide product by adopting an acid leaching wet treatment process, and 90.3 percent of nickel and 90.43 percent of iron can be extracted by the process in actual processing;
the method is characterized in that lumpy rotten rock magnesium ore (the MgO content is between 20 and 30 omega%) with high nickel and high silicon magnesium at the middle lower part and lumpy rotten rock iron magnesium ore (the MgO content is between 10 and 20 omega%) with high nickel and high silicon magnesium at the soil lower part are processed by adopting a pyrometallurgy process, mainly ferronickel products are produced, and 100 percent of nickel and 100 percent of iron can be extracted by the process in actual processing;
in conclusion, it can be seen that: the actual process is consistent with the inferred process in the table 3, the product extraction efficiency is high, and the conclusion in the table 3 is proved to be correct.
Claims (7)
1. An analysis method for mining potential of hydrous silicate type laterite-nickel ore is characterized by comprising the following steps: the method comprises the following steps:
step one, determining the position of an ore deposit:
preliminarily determining the general position of an ore body according to data information of early geophysical prospecting, chemical prospecting, well prospecting and drilling, systematically arranging a drilling project, performing geological logging, sampling, testing and analysis, and further finding out and determining the spatial position of an ore deposit;
step two, carrying out element content assay on each mineral layer drilled in the step one:
testing the contents of nickel, iron, cobalt and magnesium oxide in each ore layer by using the existing method, and sampling to perform rock and ore identification and mineral manufacturability analysis on the ores in each ore layer;
step three, judging the mineral layer reached by the drilling operation according to the content change of nickel, iron, cobalt and magnesium oxide in each mineral layer in the step two:
and according to the test result in the step two, accurately judging each mineral layer reached by the drilling operation, and sequentially from top to bottom: the rock-soil-type rock-soil composite material comprises an iron-containing covering layer, a limonite layer, a decayed rock layer and a bedrock layer, wherein the decayed rock layer comprises a soil-like decayed rock layer, a soil block-like decayed rock layer and a block-like decayed rock layer which are distributed from top to bottom, and the judgment basis is shown in table 1;
TABLE 1 test results for each material content and the corresponding mineral layer
When the contents of nickel, iron, cobalt and magnesium oxide in a specific mineral layer reached by the drilling operation simultaneously meet the ranges in the table 1, the lithology and the rock position of the mineral layer can be judged to be shown in the fifth column of the table 1;
fourthly, deducing the depth of the mineral layer reached by the current drilling operation from the bedrock face according to the reduction amplitude of the iron content in the rotten rock layer: the relation between the actually measured iron content of the drill hole in the rotten rock stratum and the depth of the final hole position of the drill hole from the basal rock face is as follows:
lx is (Fex-BFemax) x (Ls) ÷ (SFemax-BFemax) formula 1;
the letters in the formula have the following meanings:
lx is the depth from the final hole position of the drilled hole to the surface of the bedrock;
fex is the measured value of the iron content of the corrosion rock stratum at the bottom of the drilled hole;
BFemax-maximum value of iron content of bedrock stratum;
SFemax-maximum iron content of formation;
ls-average thickness of decayed rock layer;
when the thickness Lx of the final hole position of the drill hole from the surface of the bedrock is more than or equal to 3m, the drill hole is drilled downwards continuously until Lx is less than or equal to 1 m;
when the thickness of the final hole position of the drilled hole from the base rock surface is not less than 1m and not more than 3m, judging according to the distribution change condition of the iron content of the decayed rock stratum of the adjacent drilled holes on site:
if the actual thickness of the rotten rock layer in 50% or more of the adjacent drill holes is larger than the average thickness Ls of the rotten rock layer or the calculated thickness Lx of the final hole position of the adjacent drill holes of 50% or more of the adjacent drill holes is larger than or equal to 3m from the surface of the bedrock, the drill holes still need to be drilled downwards;
if the actual thickness of the rotten rock layer in the adjacent drill holes below 50 percent is less than the average thickness Ls of the rotten rock layer or the calculated thickness Lx of the final hole position of the adjacent drill holes above 50 percent from the surface of the bedrock is less than or equal to 1m, the drill holes do not need to continue downwards;
when the thickness Lx between the position of the final hole of the drill hole and the surface of the foundation rock is less than or equal to 1m, the position of the final hole of the drill hole is close to the surface of the foundation rock, and the drill hole does not need to continue downwards.
2. The method for analyzing mining potential of hydrous silicate type lateritic nickel ore according to claim 1, characterized by comprising the following steps: further comprising the steps of:
step five, judging the ore type of the hydrous silicate type laterite-nickel ore according to the content of the magnesium oxide in the decayed rock layer:
according to the current domestic investigation specifications, the industrial technical grade indexes of hydrous silicate type laterite-nickel ore can be divided according to the MgO content, and the industrial types of the ore are as follows:
when Y is more than 0 and less than 10 omega percent, the iron ore is used;
when Y is more than or equal to 10 and less than 20 omega percent, the iron-magnesium ore is obtained;
when Y is more than or equal to 20 and less than 30 omega percent, the magnesium ore is used;
y-magnesia content in the saprolite layer;
step six, selecting a subsequent smelting process according to the contents of nickel, iron and magnesium oxide tested in the step two and the ore type of the hydrous silicate type laterite-nickel ore obtained in the step five, wherein the selection standard is as shown in Table 3:
TABLE 3 smelting process corresponding to each mineral layer of hydrous silicate type laterite-nickel ore
When a particular formation is reached by the drilling operation and the nickel, iron, and magnesium oxide contents of the formation satisfy the ranges in table 3, it is determined that the treatment process for the formation is suitable as shown in the rightmost column of table 3.
3. The method for analyzing the mining potential of lateritic nickel ores containing water silicate according to claim 1 or 2, characterized in that: the relationship between the average iron content and the average magnesia content of the decayed rock layer in the second step is as follows:
Y＝0.0000193X4-0.0023969X3+0.1079729X2-2.4617056X +32.66 formula 2;
in order to quickly calculate the content of magnesium oxide in the decayed rock stratum, the method is simplified as follows:
y-40.0483-1.0011 × X, wherein the letters have the following meanings:
y-magnesia content in the saprolite layer;
x-iron content in the decayed rock formation.
4. The method for analyzing the mining potential of lateritic nickel ores containing water silicate according to claim 1 or 2, characterized in that: in the second step, the relativity between the iron element and the nickel element in the limonite layer conforms to the following formula:
fe 125Ni-79.375 formula 3-1.
5. The method for analyzing the mining potential of lateritic nickel ores containing water silicate according to claim 1 or 2, characterized in that: in the second step, the relativity between the iron element in the limonite layer and the magnesium oxide accords with the following formula:
fe-1.8861 MgO +49.1821 formula 3-2.
6. The method for analyzing the mining potential of lateritic nickel ores containing water silicate according to claim 1 or 2, characterized in that: in the second step, the relativity of the iron element and the nickel element in the soil rotten rock layer and the soil block rotten rock layer conforms to the following formula:
fe 66.6667Ni-98.33333 formula 4-1.
7. The method for analyzing the mining potential of lateritic nickel ores containing water silicate according to claim 1 or 2, characterized in that: in the second step, the relativity between the iron element and the magnesium oxide in the soil rotten rock layer and the soil blocky rotten rock layer conforms to the following formula:
fe ═ 3.060MgO +49.3727 formula 4-2.
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Effective date of registration: 20200709 Address after: No.68, Xinhua East Road, economic and Technological Development Zone, Jinchuan District, Jinchang City, Gansu Province Patentee after: Jinchuan nickel cobalt research and Design Institute Co., Ltd Address before: 737103 No. 98, Jinchuan Road, Jinchang, Gansu Patentee before: JINCHUAN GROUP Co.,Ltd. |