KR101468731B1 - Beneficiation method of low grade scheelite ore - Google Patents

Abstract

The present invention discloses a floating sorting method of low-grade talcum using soda emulsion. The present invention relates to a process for the production of a microparticle, comprising: mixing microparticles with water to form a mineral liquid; Floating the talcum in the optical solution and recovering the conic section concentrate; A step of floating the concreted shipbuilding concentrate completed in shipbuilding to obtain a concretion concentrate concentrate; And an alkaline solution treatment step for adjusting the concentration of the alkaline hydrogen ion in the light liquid. In the process of obtaining the shipbuilding concentrate and the concentrate, the emulsion is added in order to increase the alkaline hydrogen ion concentration of the light liquid do.

Description

[0001] The present invention relates to a low grade scheelite ore,

The present invention relates to a floating sorting method of a low-grade talcum, and more particularly, to a floating sorting method of a low-grade talcum using soda emulsion.

Caulite (CaWO ₄ ) is a tetragonal mineral with the same crystal structure as chalcopyrite. Its color is yellow, brown, gray, red, etc. and it becomes the main ore of tungsten. China, Myanmar and the United States.

Quartzite often represents tetragonal crystals, and is produced as massive, granular. Many are translucent white, with yellow, brown, gray, green, and red. A hardness of 4.5 to 5, and a specific gravity of 5.7 to 6. [ The streak color is white, and there is a fat gloss or a gold gloss gloss. It contains 80.6% tungsten trioxide WO ₃ and becomes the main ore of tungsten.

Quartzite is one of the important rare metal minerals that are indispensable for high value added special steel, lighting, reagents and catalyst industries. Recently, the government has classified mine stone as strategic rare metal minerals and is promoting policy for securing national stability.

Therefore, much research has been conducted on improving the economical efficiency of low grade ore by improving the quality of low - grade ore by applying low - cost and easy - to - apply non - weighting method to obtain high - grade ore.

However, even if the grade of ore is low, it may be possible to use some sort of granite or granule in order to apply the existing sorting method. However, it is not easy to apply the screening method for the improvement of the early quality of the low - grade conglomerate which is naturally fine - grained and mixed with gangue minerals in the ore.

Furthermore, CaWO ₄ composed of calcium (Ca) constitutes gangue minerals composed of various other calcium components, namely, calcite (CaCO ₃ ), fluorite (CaF ₂ ), apatite (CaPO ₄ ), dolomite (Mg ₃₎ as well as biotite _{(K (Mg, Fe) 3} (Al, Fe) Si 3 O 10 (OH, F) 2), muscovite _{(KAl 2 (AlSi 3) O} 10 (OH) 2), quartz (SiO ₂ ), amphibole _{((Ca, Na) 2 -} 3 (Mg, Fe 2 +, Fe 3 +, Al) 5 (Al, Si) is a complex mixture with gangue minerals such as ₈ O ₂₂ (OH) ₂₎ In order to treat low-grade ore, which is accompanied by pyrite, europium, pyroxene, and magnetite, it is necessary to apply different sorting methods connected to the floating sorting method so that high-quality decanter concentrate can be recovered.

A prior art related to this is the recovery method of molybdenum concentrate disclosed in Korean Patent No. 10-1135607.

The present invention relates to a method for preparing a low-grade ore-like ore, which is obtained by crushing, crushing and grinding a low-grade molybdenum ore in a very fine (not more than 0.1 mm) In order to increase screening efficiency, it is necessary to remove the ferrous minerals first by magnetic force lines, and to remove the ferrous iron minerals again in the remaining liquid, .

According to an embodiment of the present invention, there is provided a floating sorting method of a low-grade talcum using soda emulsion, the method comprising: forming a light solution by mixing fine particles with water; Floating the talcum in the optical solution and recovering the conic section concentrate; A step of floating the concreted shipbuilding concentrate completed in shipbuilding to obtain a concretion concentrate concentrate; And an alkaline solution treatment step for adjusting the concentration of the alkaline hydrogen ion in the light liquid. In the process of obtaining the shipbuilding concentrate and the concentrate, the emulsion is added in order to increase the alkaline hydrogen ion concentration of the light liquid do.

According to another aspect of the present invention, there is provided a floating sorting method of a low-grade talcum using soda emulsion according to an embodiment of the present invention, comprising: forming a mineral liquid by mixing fine particles with water; Floating the talcum in the optical solution and recovering the conic section concentrate; A step of floating the concreted shipbuilding concentrate completed in shipbuilding to obtain a concretion concentrate concentrate; An alkaline solution treatment step for adjusting the hydrogen ion concentration of the light liquid to a predetermined concentration; And a sedimentation and solid-liquid separation step for increasing the concentration of the recovered lignite concentrate concentrate, wherein soda emulsion is added to adjust the concentration of hydrogen ions in the process of obtaining the ship concentrate and the concentrate concentrate .

According to another aspect of the present invention, there is provided a floating sorting method of a low-grade talcum using soda emulsion according to an embodiment of the present invention, comprising: forming a mineral liquid by mixing fine particles with water; Floating the talcum in the optical solution and recovering the conic section concentrate; A step of floating the concreted shipbuilding concentrate completed in shipbuilding to obtain a concretion concentrate concentrate; An alkaline solution treatment step for adjusting the hydrogen ion concentration of the light liquid to a predetermined concentration; Sedimentation and solid - liquid separation steps for increasing the concentration of recovered lignite concentrate concentrate; And a step of agitating the collected talcum concentrate concentrate in a high concentration slurry in an alkaline solution by recovering the precipitated concentrate and solid-liquid separation treatment. In order to control the hydrogen ion concentration of the concentrate in the process of obtaining the concentrate and the concentrate, Is added.

According to the present invention, it is possible not only to improve the efficient floatation effect of the low-grade talc, but also to remove the iron-containing minerals, which may be environmentally problematic, from the ore ore with the wet magnetic separator.

In addition, by removing the sulfide minerals contained in the ore in advance by flotation, it is possible not only to increase the floatation efficiency of the facade, but also to remove the sulfide minerals that may be an environmental problem in advance, The tailing products that can be generated and the harmful components contained in the wastewater can be reduced in advance.

In addition, the present invention does not use various reagents such as a hydrogen ion concentration regulator, an inhibitor for inhibiting gangue minerals, and the like, and it is also possible to control the hydrogen ion concentration of the light liquid as one sodium sulfite (Na ₂ S) reagent , It is possible to simultaneously suppress various ganglia other than the concretion stone, so that the treatment process can be simplified and the recovery rate of the concretion concentrate can be increased, and the amount of the reagent used can be minimized.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic flow chart for explaining a floating sorting process using soda emulsions for recovering high-quality decoy fractions from a low-grade decoy according to the present invention; FIG.
FIG. 2 is a detailed flowchart of a floating sorting process using the emulsified soda according to FIG. 1;

Hereinafter, embodiments of a floating sorting method using soda emulsions according to the present invention will be described with reference to the accompanying drawings. Underneath, middling means a mixture of mullite and gangue, and tailing means the product that remains in the liquid without being floated during float sorting.

For example, in order to improve the economic dignity of the Joseon Concentrates, there is a product that remains in the mineral water when the primary shipyard concentrate is selected. In addition, gangue minerals as well as some minor minerals are also lost in this product. This product is called the middle ring. And, theoretically, floating particles in sediment should be the buckwheat minerals, while the remaining remains in glacier must be gangue minerals that are not floated, but in fact some of the caulkstone minerals may be lost in tailing products.

FIG. 1 shows a method for recovering high-quality municipal concentrate according to the present invention, and FIG. 2 shows the method for recovering high-quality municipal concentrate according to the present invention in more detail.

Referring to FIGS. 1 and 2, the method for recovering high-quality clay concentrate according to the present invention includes a preprocessing step S100, a floating separation step S200 and a specific gravity separation step S300.

In the pretreatment step (S100), the product obtained by crushing or crushing the ore ore is wet-polished by a photolithographic apparatus to produce a liquid mixture of fine particles of a predetermined size or smaller and water, and a magnetic component- After separation, the sulphide minerals are suspended.

The float sorting step S200 includes a step S210 of selecting the concretes, a step S220, and a solid-liquid separation step S240 S250.

In the step S210, the sulfide minerals are selected by floating, and the sulfide minerals are removed from the remaining minerals. At this time, sodium silicate (Na ₂ S) may be added to control the hydrogen ion concentration of the light liquid and to act as a gangue inhibitor for the claran flotation screening. It is also possible to separate the mineral bubbles generated by adding the catching agent collecting the ore and the foaming agent adhered to the collected ore particles, and to carry out the collection of the concretion shipbuilding concentrate.

At this time, it is preferable to add sodium sulfide so that the hydrogen ion concentration of the light solution becomes 9.0-10.0 pH. When the concentration of hydrogen ions in the solution is less than 9.0 pH, large amounts of other gangue (other debris minerals) flocculate in the sediment concentrate products when the seawater is sorted. If the concentration of hydrogen ions in the solution exceeds 10.0 pH, This is because there is a high possibility that the seaweed is lost due to the tailing product because it is suppressed with gangue.

The step S220 of selecting the talcum concentrate concentrate S230 includes the step S220 of collecting the concentrate concentrate concentrate 1 by flotation with the concretion concentrate with the concretion concentrate concentrate S220 and the step S220 of recovering the concentrate concentrate concentrate 1 with the concretion concentrate concentrate 1, 2 (referred to as a first facet of concentrate) (S230). At this time, soda emulsion can be added to adjust the hydrogen ion concentration of the light liquid.

The solid-liquid separation step S240 (S250) comprises a sedimentation and solid-liquid separation step (S240) for raising the concentration of the recovered primary-scale irregular concentrate (S240), an alkaline irrigation Stirring and solid-liquid separation in the solution (S250). On the other hand, after the first facial-water concentrate is treated in an alkaline solution and subjected to solid-liquid separation, the liquid phase portion can be continuously treated with the subsequent first facial-water concentrate product, which may be supplemented with a new alkaline solution .

Meanwhile, after the float selection step of the present invention, it is also possible to increase the recovery efficiency of the high-quality decanter concentrate by adding a separate gravity separation step.

Hereinafter, the present invention will be described in more detail with reference to examples.

Example

Referring to FIG. 2, about 2,000 gr of a product (3-5 mm) obtained by crushing and pulverizing low-grade gypsum ores is wet-milled with a photolithographic apparatus to obtain a fine powder having a size of 0.1 mm or less and mixed with water.

This mineral liquid is subjected to a single treatment in a wet magnetic separator (1) having a magnetic force of about 5,000-6,000 Gauss to separate the primary magnetic mineral and the primary nonmagnetic product.

In some cases, the primary non-magnetic product is subjected to scavenging again about 2-3 times, and the recovered magnetic product and the primary magnetic product are combined and then treated again about 2-3 times to recover the iron-containing minerals Remove the non-magnetic and non-magnetic products from the two or three rounds of quartz processing and combine them into a cell of the floating separator to perform flotation of the sulfide mineral (2).

At this time, the hydrogen ion concentration of the light solution is adjusted to a weak acidity with a sulfuric acid solution. Then, about 50-100 grams / ton of alcoholic foaming agent, MIBC, was added to the suspension, and air was injected into the floating separator. The mineralized bubbles of the sulfide minerals are suspended and recovered.

In some cases, the cleaning process may be performed two or three more times in order to further recover the sulfide minerals in the optical fluids.

In the present invention, various control agents and inhibitors are used in other flotation screening, in the flotation screening (3) with the remaining light liquid in which sulfide minerals are removed by floatation. In the present invention, the present invention serves as a regulator for making the hydrogen ion concentration of the light liquid alkaline, (Na2S), which can act as an inhibitor to inhibit other gangue minerals. The amount of Na2S added may vary slightly depending on the conditions of the light, but usually the hydrogen ion concentration of the light is in the range of 9-9.5 pH After adding a small amount of about 300 grams / ton and adjusting the conditions required to adjust it, a small amount of sodium oleate, which is a catcher of the talc, is also added in a small amount of about 100-200 grams / ton.

Subsequently, a reagent such as Aeroflus 65 (AF65 #), which is a foaming agent, is added in a small amount of about 25 grams / ton to give the reaction time of the reagent.

After the reaction time of the reagent has elapsed in the optical fluid, air is injected into the floating separator, and the whale and some gangue are floated together with the air bubbles. When the product is scraped off from the cell of the floating separator, the product is called conglomerate . In this case, only a small amount of sodium hydroxide (Na ₂ S) is added so that the hydrogen ion concentration of the solution is 9.0-9.2, and the condition reaction time is given After that, air is injected into the floating separator to separate the floating whale concentrate products and precipitated gangue products respectively. At this time, the precipitated products are referred to as middle rings 1 and 2, and these products are sent back to the preliminary flotation screening process on site to recover the ore minerals.

In addition, since the recovered two-times concretion concentrate (referred to as the first concretion concentrate) is in a slurry state having a low concentration of light, the precipitate and solid-liquid separation treatment (6) It should be a product in slurry form or a product in cake form.

Since these primary concretes concentrates are trapped by catching agents and foams, they have a strong hydrophobicity (water rejection characteristic). Therefore, in order to change these properties to hydrophilic properties (water-wetting properties), about 1-5% (Such as Na ₂ CO ₃ , Na ₂ SiO ₃ , NaOH or the like) and reacted with stirring for a predetermined period of time. The precipitate is again subjected to precipitation and solid-liquid separation, and the solution is recovered and recycled.

The properties of the low grade ore used in the present invention are described in the following Table 1, and the results of the recovery of the first and second high-grade conglomerate concentrates recovered according to the treatment process are described in Table 2, respectively.

ingredient WO ₃ SiO ₂ Al ₂ O ₃ Fe ₂ O ₃ CaO elegance(%) 0.4-0.7 52.56 9.93 15.32 13.41

Product name Quality (WO ₃ %) Recovery of municipal solid waste (%) Concentrate for first meeting 6.76 84.0 High-grade plaque concentrate 69.9 83.8

According to the results of Table 2, the low-grade gypsum ore (about 0.4-0.7% WO ₃ ) of the present invention was purified by the method of the above example. As a result, the grade of the first gypsum concentrate was about 6.76% WO ₃ and the recovery rate was about 84.0 %. ≪ / RTI >

In addition, it can be seen that the final high-quality concretite concentrate recovered by treating the first concretenza concentrate in the alkaline solution and recovering the tabular grains was about 69.9% WO ₃ and the recovery rate was about 83.8%.

Comparative Example  One

For comparison with the embodiment of the present invention, the same low-grade gypsum ore (about 0.4-0.7% WO ₃ ) was subjected to the following procedure.

At this time, crushing, crushing, crushing, removal of iron component, removal of sulphide mineral floating, and recovery of the concretes are carried out in the same manner as in the embodiment of the present invention.

However, it is expected that the process of selecting the concretes of the conglomerates will be carried out up to 6 times rather than 2 times, and the other conglomerates will be recovered by using other inhibitor reagents in order to effectively separate the conglomerates and other gangue minerals Respectively.

Therefore, the pH of the light solution was adjusted to 10.0 pH with NaOH at 7 times of the flotation, and 50 g / ton of Na ₂ SiO ₃ was added. A small amount of 15 g / ton of Quebrach was added, Later, air was injected into the floating separator to separate and collect suspended and precipitated products.

At this time, the precipitated product was recovered as final concretes concentrate, and the results are shown in the following [Table 3].

Product name Quality (WO ₃ %) Recovery of municipal solid waste (%) Concrete Concentrate 25.7 74.6

In this comparative experiment, other inhibitor reagents were used to recover only the high-quality decanter concentrate, but no satisfactory results were obtained. (CaCO ₃ ), fluorite (CaF ₂ ), and apatite (CaPO ₄ ), which are accompanied by Caulite (CaWO ₄ ), contain Ca components in spite of the use of small amounts of inhibitors. It can be seen that it is not possible to selectively recover the high quality decanter concentrate because it shows almost the same reaction with the reagents.

Comparative Example  2

Comparative Example 2, which can be compared with the embodiment of the present invention, was tested through the following process.

In order to examine the methods and reagents generally known in the process of flotation process, the following experiment was carried out to investigate the comparative use of low-grade concreted ore ore, crushing, crushing, iron removal, Respectively.

First, Na ₂ CO ₃ was used to maintain pH 10.0 in the buffer solution. Na ₂ SiO ₃ , a gangue inhibitor, was added at a rate of about 500 g / After adding about 120 grams / ton of Jane oleate soda and about 25 gram / ton of AF65 foaming agent, air was supplied to the floating sorting machine and the concreted shipbuilding concentrate was recovered.

Placed in a number of scheelite concentrate shipbuilding again suspended cell sorter (cell) the pH of the pulp was fixed at 10.0pH using _{Na 2 CO 3, Na 2 SiO} 3 in which the reagent after scheelite choice 1, 2, 3 into the reaction The final concretenza concentrate was recovered.

The amount of Na ₂ SiO ₃ reagent added in the first, second and third courses of the talcum was about 250 grams / ton, about 120 grams / ton and about 60 grams / ton, respectively. The result of the concretion concentrate recovery and the effect thereof are shown in the following [Table 4].

Product name Quality (WO ₃ %) Recovery rate (%) Concrete Concentrate 31.7 29.8

Table 4. According, gangue inhibitor quality of the recovered scheelite by assigning the inhibition as well as with even scheelite result gangue with Na ₂ SiO ₃ reagent in shipbuilding and for each choice phase of scheelite flotation is not only about 31.7% WO ₃ in And the recovery rate was only about 29.8%.

Comparative Example  3

In order to compare the present invention with the present invention, a conventional flotation screening method using a low grade decayed ore sample was carried out in a foreign country. The first decanter concentrate was recovered and maintained at 90 degrees centigrade in a high concentration NaOH and Na ₂ SiO ₃ mixed solution for 90 minutes Comparative Example 3, which was conducted to recover the high-grade decanter concentrate by applying a general floating sorting method and process after heat treatment, is as follows.

First, wet grinding of the low-grade gypsum ore to less than 0.075 mm was carried out, and about 40 grams / ton of CuSO ₄ , about 100 grams / ton of BX and about 30 grams / ton of pine oil were added After the reaction, the sulfide minerals were removed by floating, and the talc was floated in the remaining liquid.

In the scheelite flotation shipbuilding process, Na ₂ CO ₃ from about 1,000 grams / ton, Na ₂ SiO ₃ from about 3,000 grams / ton, GYWA after each reaction was added to about 300 grams / ton, to thereby recover the scheelite concentrate shipbuilding. At this time, the process of cleansing the gypsum was repeated three times, and about 150 grams / ton, about 120 grams / ton and about 60 gram / ton of GYWA catcher reagent were added each time to completely recover the seamstones.

And was carried through the scheelite shipbuilding concentrate twice to process choice was by the addition of Na ₂ SiO ₃ gangue inhibitor each time each of about 1,000 grams / ton, 800 g / tons recovering scheelite choice concentrate (primary scheelite concentrate) . In order to recover the high-quality decanter concentrate from this primary conglomerate concentrate, a pretreatment process is required, which is a heat treatment in a caustic soda (NaOH) solution at 90 degrees Celsius for 90 minutes.

The reagent to be added can be seen that the amount of from about 2,000 grams / ton, Na ₂ SiO ₃ from about 61,000 grams / ton, GYWA about 300 grams / ton degree not less reagent NaOH consumed.

In addition to this, in addition to the above-mentioned heating process, the gypsum GYWA, about 300 grams / ton, about 260 grams / ton, about 160 grams / ton, Was added to recover the high-quality decanter concentrate. The experimental results and effects of Comparative Example 3 are shown in Table 5.

Product name Quality (WO ₃ %) Recovery of municipal solid waste (%) Concentrate for first meeting 6.37 87.96 Final Concrete Concentrate 65.26 81.13

The results of Table 5 show that the first concentrate of concentrate (6.37% WO ₃ ) was recovered at about 87.96% and after heating for 90 minutes at a temperature of 90 ° C in concentrated NaOH and Na ₂ SiO ₃ solution, (65.26% WO3) recovered by reclaiming the whale-stone refuse was recovered at about 81.13% recovery rate.

However, the results of this experiment are similar to those of the results of Table 1 obtained by the process of the present invention and the process (FIG. 2) of the present invention. However, since the amount of reagent used, the heat treatment for a long period of time, It is expected that not only the excessive treatment cost but also the environmental problems due to the large amount of residual reagent will be small.

Claims (7)

Mixing the microparticles with water to form a light liquid;
Floating the talcum in the optical solution and recovering the conic section concentrate;
A step of floating the concreted shipbuilding concentrate completed in shipbuilding to obtain a concretion concentrate concentrate; And
And an alkaline solution treatment step for adjusting the hydrogen ion concentration of the light liquid to a predetermined concentration,
In order to adjust the hydrogen ion concentration of the light liquid in the process of obtaining the shipbuilding concentrate and the concentrate concentrate,
Wherein the step of treating the alkaline solution further comprises a step of agitating the recovered and recovered high-concentration slurry-collected talcum concentrate into an alkaline solution.
Mixing the microparticles with water to form a light liquid;
Floating the talcum in the optical solution and recovering the conic section concentrate;
A step of floating the concreted shipbuilding concentrate completed in shipbuilding to obtain a concretion concentrate concentrate;
An alkaline solution treatment step for adjusting the hydrogen ion concentration of the light liquid to a predetermined concentration; And
And a sedimentation and solid-liquid separation step for increasing the concentration of the concentrated liquid of the extracted talcum concentrate,
In order to adjust the hydrogen ion concentration of the light liquid in the process of obtaining the shipbuilding concentrate and the concentrate concentrate,
Wherein the step of treating the alkaline solution further comprises a step of agitating the recovered and recovered high-concentration slurry-collected talcum concentrate into an alkaline solution.
Mixing the microparticles with water to form a light liquid;
Floating the talcum in the optical solution and recovering the conic section concentrate;
A step of floating the concreted shipbuilding concentrate completed in shipbuilding to obtain a concretion concentrate concentrate;
An alkaline solution treatment step for adjusting the hydrogen ion concentration of the light liquid to a predetermined concentration;
Sedimentation and solid - liquid separation steps for increasing the concentration of recovered lignite concentrate concentrate; And
And agitating the collected talcum concentrate concentrate in an alkaline solution in a high concentration slurry in a recovered state by precipitation and solid-liquid separation,
Wherein the soda emulsion is added to adjust the hydrogen ion concentration of the light liquid in the process of obtaining the shipbuilding concentrate and the concentrate concentrate.
4. The method according to any one of claims 1 to 3,
Wherein the low grade talc is crushed by magnetic grinding before the floating sorting step.
4. The method according to any one of claims 1 to 3,
Wherein the emulsion is added so that the hydrogen ion concentration of the light solution becomes 9.0-10.0 pH.
delete 4. The method according to any one of claims 1 to 3,
Further comprising the step of adding a catching agent for trapping the ore and a foaming agent to which the caoutchouc particles are adhered.

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