CN110369122B - Beneficiation method for efficiently recovering high-sulfur gold-copper ore - Google Patents
Beneficiation method for efficiently recovering high-sulfur gold-copper ore Download PDFInfo
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Abstract
The invention discloses a beneficiation method for efficiently recovering high-sulfur type gold and copper ores, which comprises the steps of ore grinding, all-sulfur mixed floating roughing, mixed floating rough concentrate concentration operation, all-sulfur mixed floating scavenging operation, mixed floating concentrate copper fast floating operation, regrinding, copper and sulfur separation roughing operation, copper and sulfur separation scavenging operation, copper concentration operation and the like. The invention has obvious recovery effect, energy saving, low consumption and strong adaptability to high-sulfur type copper-gold ores.
Description
Technical Field
The invention relates to the technical field of mineral separation, in particular to a mineral separation method for efficiently recovering high-sulfur type gold and copper ores, which is particularly suitable for treating copper sulfide ores containing high sulfur and associated gold, mainly gold wrapped by pyrite.
Background
The existing forms of copper in nature include copper oxide, copper sulfide and native copper, wherein the copper sulfide ore reserves the most, and more than 80% of copper in the world is extracted from the copper sulfide. China is a big country for importing copper resources, and the separation of copper and sulfur is a technical key for hindering the utilization rate of the copper resources in China. Researchers in China carry out a great deal of research aiming at the problem of copper-sulfur separation of various large mines in China, but the problem that the production index of copper selection in a high-sulfur copper ore dressing plant is not ideal is difficult to solve.
The types of the ore bodies of the high-sulfur copper ores are mainly copper-containing pyrite types, and then copper-containing magnetite ores, copper-containing skarns, copper-containing flint pyrites and copper-containing amphibole types. The main metal minerals of the raw ore comprise pyrite, marcasite, chalcopyrite, bornite (containing copper blue), sphalerite, magnetite and hematite and limonite. The gangue is carbonate such as quartz and calcite, and garnet.
For the high-sulfur associated gold and copper ores, the traditional separation process mainly comprises a preferential flotation process, a mixed flotation and separation process, a first preferential flotation and mixed flotation process and the like. Because the raw ore is difficult to inhibit sulfur-containing high-pyrite, and the copper minerals are mainly secondary copper which is easy to oxidize, more copper ions enter the ore pulp after oxidation to activate the pyrite, so that the separation of copper and sulfur is more difficult, and the dissociation of the copper-containing minerals and the separation of pyrite are the key points of the ore classification.
If a single mixed flotation or preferential flotation process is adopted and the high-copper sulfur-containing ore is sorted in a heavy pressure forced pulling mode, the problems of generally high medicament consumption, large middling circulation volume, poor sorting effect, low ore sorting recovery rate, poor concentrate quality, difficulty in recycling associated gold and silver and the like exist. To obtain better indexes, the method has greater adaptability and flexibility in process selection, can realize early receiving and multi-receiving of receiving, can quickly lose and avoid the vicious circle of middlings. In the copper-sulfur flotation process, when the ore species are accompanied by precious metals such as gold, silver and the like, gold and silver minerals need to be enriched into copper concentrate as much as possible, and when a flotation reagent system is adopted, the selectivity of a collecting agent and the influence of an iron sulfide mineral inhibitor on the recovery effect of the associated gold and silver minerals are fully considered.
Therefore, the development of the high-sulfur type gold-copper ore sorting process with good sorting effect, strong adaptability, low unit cost and less environmental pollution is beneficial to improving the comprehensive recovery level of the refractory high-sulfur type copper ore.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide the beneficiation method for efficiently recovering the high-sulfur type gold and copper ore, and the method has the advantages of remarkable recovery effect, energy conservation, low consumption and strong adaptability to the high-sulfur type copper and copper ore.
In order to achieve the purpose, the invention adopts the following technical scheme:
a beneficiation method for efficiently recovering high-sulfur gold-copper ore comprises the following steps:
s1, grinding: feeding the crushed raw ore and water into a mill for milling until the fineness of the crushed raw ore is-0.074 mm and accounts for 70%;
s2, coarse separation by total sulfur mixed flotation: adding a sulfide ore collecting medicament, namely butyl xanthate, stirring, adding foaming agent, namely pine oil, stirring, then carrying out full-sulfur mixed flotation and rough concentration, feeding the obtained concentrate into mixed flotation and rough concentrate concentration operation, and feeding the obtained tailings into full-sulfur mixed flotation scavenging operation;
s3, floating and roughing concentrate concentration operation: performing blank concentration to obtain concentrate, namely, floating concentrate, wherein the floating concentrate enters into copper fast floating operation of the floating concentrate, and the obtained tailings return to the coarse concentration operation of full-sulfur floating;
carrying out mixed floatation and scavenging on the total sulfur: adding a sulfide ore collecting medicament, namely butyl xanthate, stirring, adding a foaming agent, namely pine oil, stirring, then carrying out first all-sulfur mixed flotation and scavenging, returning the obtained concentrate to the first all-sulfur mixed flotation and roughing operation, and feeding the obtained tailings to the second all-sulfur mixed flotation and scavenging operation;
s4, carrying out a second operation of full-sulfur mixed floating and scavenging: adding a sulfide ore collecting agent butyl xanthate and stirring, adding a foaming agent pinitol oil and stirring, then carrying out second all-sulfur mixed flotation and scavenging, returning the obtained concentrate to first all-sulfur mixed flotation and scavenging operation, and obtaining tailings which are all-sulfur mixed flotation tailings;
carrying out mixed flotation concentrate copper fast flotation operation: feeding minerals participating in mixed flotation concentrate copper fast flotation operation into a flotation machine, adding lime and an oxidant calcium hypochlorite into the flotation machine, stirring, adding a collecting agent Z-200, stirring, then carrying out mixed flotation concentrate copper fast flotation to obtain concentrate I, and grinding the obtained tailings;
s5, regrinding: the tailings obtained by the mixed flotation concentrate copper fast flotation operation enter regrinding operation, lime and calcium hypochlorite are added into a mill, the regrinding degree is controlled to be minus 0.030mm and accounts for 80%, and the obtained regrinding product enters copper-sulfur separation roughing operation;
s6, copper and sulfur separation and roughing operation: adding Z-200, stirring, carrying out copper-sulfur separation, feeding the obtained copper rough concentrate into copper concentration operation, and feeding tailings into copper-sulfur separation scavenging operation;
s7, copper and sulfur separation and scavenging: performing four copper-sulfur separation scavenging on the tailings obtained in the step S6, and adding lime and a collecting agent Z-200 in the four copper-sulfur separation scavenging; returning the concentrate obtained by the first copper-sulfur separation scavenging to the copper-sulfur separation roughing operation, and returning the concentrate obtained by the last copper-sulfur separation scavenging operation; the tailings obtained by each copper-sulfur separation scavenging enter the next copper-sulfur separation scavenging, and the tailings obtained by the last copper-sulfur separation scavenging are sulfur concentrate;
copper fine selection operation: carrying out copper concentration operation twice, returning tailings obtained in the first copper concentration operation to enter copper-sulfur separation roughing operation, and feeding obtained concentrate to the second copper concentration operation; the concentrate obtained by the second copper concentration operation is copper concentrate II, and the obtained tailings return to the first copper concentration operation; calcium hypochlorite is added in the two copper concentration operations.
Further, in step S1, the ratio of the raw ore to water is 2: 1.
further, in step S2, the dosage of the butyl xanthate and the pine oil is respectively 80-100g of the butyl xanthate and 15-30g of the pine oil added to each ton of the mineral according to the dry weight of the mineral participating in the whole sulfur mixing and flotation.
Further, in the first operation of the total-sulfur mixed flotation and scavenging in the step S3, the dosage of the butyl xanthate and the pine oil is 40-50g of the butyl xanthate and 5-10g of the pine oil added to each ton of the mineral respectively according to the dry weight of the mineral participating in the first operation of the total-sulfur mixed flotation and scavenging.
Further, in the second operation of the total-sulfur mixed flotation and scavenging in the step S4, the dosage of the butyl xanthate and the pine oil is respectively 20-40g of the butyl xanthate and 5-10g of the pine oil added to each ton of the mineral according to the dry weight of the mineral participating in the second operation of the total-sulfur mixed flotation and scavenging.
Further, in the mixed flotation concentrate copper fast flotation operation of the step S4, 1500-3000g of lime, 500-1000g of oxidant calcium hypochlorite and 5-10g of collecting agent Z-200 are added to each ton of minerals according to the dry weight of the minerals participating in the mixed flotation concentrate copper fast flotation operation.
Further, in the regrinding operation of step S5, 1000-1500g lime and 300-600g calcium hypochlorite are added to each ton of tailings obtained in the mixed flotation concentrate copper fast flotation operation according to the dry weight of the tailings obtained in the mixed flotation concentrate copper fast flotation operation.
Furthermore, in the copper-sulfur separation and rough concentration operation of the step S6, 5-10g Z-200 weight portions of the copper-sulfur separation and rough concentration operation are added according to the dry weight of the minerals participating in the copper-sulfur separation and rough concentration operation.
Furthermore, in the copper-sulfur separation and scavenging operation of the step S7, in the four copper-sulfur separation and scavenging processes according to the dry weight of minerals participating in each copper-sulfur separation and scavenging process, the addition amounts of lime are respectively 200g, 100g and 100g of lime added to each ton of minerals, and the addition amounts of Z-200 are 3-6g Z-200 added to each ton of minerals.
Further, in the copper concentration operation of step S7, in the first copper concentration operation, 200g of calcium hypochlorite is added per ton of minerals based on dry weight of minerals participating in the first copper concentration operation; in the second copper concentration operation, 100g of calcium hypochlorite is added per ton of minerals based on the dry weight of the minerals participating in the second copper concentration operation.
The invention has the beneficial effects that:
1. according to the invention, the full-sulfur mixed flotation is carried out under the condition of the pH value of the natural ore pulp, so that the high-efficiency recovery of target minerals is realized, and particularly, the high-efficiency recovery effect on associated gold is obvious.
2. In the invention, copper and gold are quickly floated before the regrinding of the bulk concentrate, which is beneficial to the recovery of associated gold minerals, creates favorable conditions for the subsequent regrinding and separation, reduces the regrinding material feeding amount, and reduces the regrinding energy consumption and the subsequent copper and sulfur separation difficulty.
3. The flotation reagent system is simple, the process flow is reliable, the flotation index is stable, the recovery effect is good, and the energy conservation and consumption reduction are facilitated.
Drawings
FIG. 1 is a schematic general flow diagram of the process of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, and it should be noted that the present embodiment is based on the technical solution, and the detailed implementation and the specific operation process are provided, but the protection scope of the present invention is not limited to the present embodiment.
Example 1
A beneficiation method for efficiently recovering high-sulfur gold-copper ore comprises the following steps:
s1, grinding: mixing the crushed raw ore and water according to the weight ratio of 2: 1, grinding the ore in a grinder until the fineness is-0.074 mm and accounts for 70 percent, and adjusting the pH value of the ore pulp to 5-7;
s2, coarse separation by total sulfur mixed flotation: adding a sulfide ore collecting agent butyl xanthate, stirring for 2 minutes, adding a foaming agent pinitol oil, stirring for 1 minute, then carrying out all-sulfur mixed floating rough concentration, enabling the obtained concentrate (foam product) to enter mixed floating rough concentrate concentration operation, and enabling the obtained tailings to enter all-sulfur mixed floating scavenging operation; according to the dry weight of minerals participating in the full-sulfur mixed flotation and roughing, the dosage of the butyl xanthate and the pine oil is respectively 80-100g of the butyl xanthate and 15-30g of the pine oil added to each ton of the minerals;
s3, floating and roughing concentrate concentration operation: performing blank concentration to obtain concentrate, namely, floating concentrate, wherein the floating concentrate enters into copper fast floating operation of the floating concentrate, and the obtained tailings return to the coarse concentration operation of full-sulfur floating;
carrying out mixed floatation and scavenging on the total sulfur: adding a sulfide ore collecting medicament, namely butyl xanthate, stirring for 2 minutes, adding a foaming agent, namely pinitol oil, stirring for 1 minute, then carrying out first all-sulfur mixed flotation and scavenging, returning the obtained concentrate (foam product) to the first all-sulfur mixed flotation and roughing operation, and feeding the obtained tailings to second all-sulfur mixed flotation and scavenging operation; in the first operation of the all-sulfur mixed flotation scavenging, the dosage of the butyl xanthate and the pine oil is respectively 40-50g of the butyl xanthate and 5-10g of the pine oil added to each ton of mineral according to the dry weight of the mineral participating in the first operation of the all-sulfur mixed flotation scavenging;
s4, carrying out a second operation of full-sulfur mixed floating and scavenging: adding a sulfide ore collecting agent butyl xanthate and stirring for 2 minutes, adding a foaming agent pinitol oil and stirring for 1 minute, then carrying out second all-sulfur mixed flotation, returning the obtained concentrate (foam product) to the first all-sulfur mixed flotation operation, and obtaining tailings which are all-sulfur mixed flotation tailings; in the second operation of the total-sulfur mixed flotation scavenging, according to the dry weight of the minerals participating in the second operation of the total-sulfur mixed flotation scavenging, the dosage of the butyl xanthate and the pine oil is respectively 20-40g of the butyl xanthate and 5-10g of the pine oil added to each ton of the minerals;
carrying out mixed flotation concentrate copper fast flotation operation: feeding minerals participating in the mixed flotation concentrate copper fast flotation operation into a flotation machine, adding lime and an oxidant calcium hypochlorite into the flotation machine, stirring for 3-5 minutes, adjusting the pH value of ore pulp to 9-10, adding a collecting agent Z-200, stirring for 2 minutes to perform mixed flotation concentrate copper fast flotation, obtaining a concentrate (a foam product) which is a copper concentrate I, and feeding the obtained tailings into regrinding operation; adding 1500-3000g of lime, 500-1000g of oxidant calcium hypochlorite and 5-10g of collecting agent Z-200 into each ton of minerals according to the dry weight of the minerals participating in the mixed floating concentrate copper fast floating operation;
s5, regrinding: the tailings obtained by the mixed flotation concentrate copper fast flotation operation enter regrinding operation, lime and calcium hypochlorite are added into a mill, the pH value of ore pulp is adjusted to 9-10, the regrinding degree is controlled to be minus 0.030mm and accounts for 80%, and the obtained regrinding product enters copper-sulfur separation roughing operation; adding 1500g of 1000-one lime and 600g of 600-one calcium hypochlorite into each ton of tailings obtained by the mixed flotation concentrate copper fast flotation operation according to the dry weight of the tailings obtained by the mixed flotation concentrate copper fast flotation operation;
s6, copper and sulfur separation and roughing operation: adding Z-200, stirring for 2 minutes, carrying out copper-sulfur separation, and carrying out copper concentration operation on the obtained copper rough concentrate (foam product) and carrying out copper-sulfur separation scavenging operation on tailings; adding 5-10g Z-200 per ton of minerals according to the dry weight of the minerals participating in the copper-sulfur separation and roughing operation;
s7, copper and sulfur separation and scavenging: performing four copper-sulfur separation scavenging on the tailings obtained in the step S6, and adding lime and a collecting agent Z-200 in the four copper-sulfur separation scavenging; returning the concentrate obtained by the first copper-sulfur separation scavenging to the copper-sulfur separation roughing operation, and returning the concentrate obtained by the last copper-sulfur separation scavenging operation; the tailings obtained by each copper-sulfur separation scavenging enter the next copper-sulfur separation scavenging, and the tailings obtained by the last copper-sulfur separation scavenging are sulfur concentrate; according to the dry weight of minerals participating in each copper-sulfur separation scavenging, in the four copper-sulfur separation scavenging processes, the addition amounts of lime are respectively 200g, 100g and 100g of lime added to each ton of minerals, and the addition amounts of Z-200 are 3-6g Z-200 added to each ton of minerals;
copper fine selection operation: carrying out copper concentration operation twice, returning tailings obtained in the first copper concentration operation to enter copper-sulfur separation roughing operation, and feeding obtained concentrate to the second copper concentration operation; the concentrate (foam product) obtained in the second copper concentration operation is copper concentrate II, and the obtained tailings return to the first copper concentration operation; calcium hypochlorite is added in the two copper concentration operations, and 200g of calcium hypochlorite is added into each ton of minerals according to the dry weight of the minerals participating in the first copper concentration operation; in the second copper concentration operation, 100g of calcium hypochlorite is added per ton of minerals based on the dry weight of the minerals participating in the second copper concentration operation.
In fig. 1, a represents butyl xanthate, B represents pinitol oil, C represents Z-200, D represents industrial lime, E represents sodium hypochlorite, A represents raw ore, B represents copper concentrate I, C represents copper concentrate II, D represents sulfur concentrate, and E represents total sulfur mixed floating tailings.
Example 2
This example will further demonstrate the performance of the process described in example 1 by experimentation.
A certain gold-copper deposit is a high-sulfur type gold-copper ore, belongs to a high-sulfur shallow hydrothermal gold-copper deposit generated by volcanic eruption, and the ore body type is mainly a copper-containing pyrite type, copper minerals mainly comprise copper blue, and then copper arsenite, a small amount of chalcocite, chalcopyrite and bornite; the gangue minerals in the ore include quartz, potash feldspar, chlorite, alunite, mica, etc. Associated gold mainly exists in sulfide minerals, the distribution is relatively dispersed, bare gold accounts for about 15%, gold in copper sulfide minerals accounts for about 25%, and gold in pyrite accounts for about 50%.
Different ore samples of two ore bodies in the mining area are adopted for test comparison, and raw ore used in the experiment 1 contains 7.03 percent of Cu, 3.74g/t of Au3.22 percent of S; the raw ore used in experiment 2 contained 6.72% Cu, 3.81g/t Au3.81g/t S19.65%.
Experiment 1
Crushing raw ore, and mixing with water according to the weight ratio of 2: 1 proportion is fed into a mill to grind the ore until the fineness of the product is-0.074 mm and accounts for 70 percent, and the pH value of the ore pulp is 5-7; adding 80g/t of butyl xanthate and 15g/t of pine oil, carrying out total-sulfur mixed flotation roughing, carrying out primary blank concentration on the obtained concentrate (foam product), obtaining mixed flotation concentrate, adding 40g/t of butyl xanthate and 5g/t of pine oil into the obtained tailings, stirring for 2 minutes and 1 minute respectively, and carrying out first total-sulfur mixed flotation scavenging. Returning the concentrate (foam product) obtained in the first step of the all-sulfur mixed flotation scavenging to the previous cycle operation, adding 20g/t of butyl xanthate and 5g/t of pine oil into the obtained tailings, stirring for 2 minutes and 1 minute respectively, and then performing second step of the all-sulfur mixed flotation scavenging. And returning the concentrate (foam product) obtained by the second all-sulfur mixed floating scavenging operation to the previous cycle operation, wherein the obtained tailings are all-sulfur mixed floating tailings. Adding 1500g/t of lime and 500g/t of calcium hypochlorite into the flotation concentrate, stirring for 3 minutes, adjusting the pH value of ore pulp to 9-10, adding 5g/t of Z-200, stirring for 2 minutes to carry out copper flotation of the flotation concentrate to obtain concentrate (foam product B) which is copper concentrate I, adding 1500g/t of lime and 600g/t of calcium hypochlorite into the obtained tailings to carry out regrinding operation, and controlling the regrinding degree to be 80% at-0.030 mm. Controlling the pH value of the ore pulp to be 9-10, adding Z-200 to be 5g/t, stirring for 2 minutes, performing copper-sulfur separation roughing operation, enabling copper rough concentrate (foam product) to enter copper concentration operation, and enabling copper-sulfur separation roughing tailings to enter four copper-sulfur separation scavenging operations. Lime is respectively added in 200g/t, 100g/t and 100g/t in the four copper-sulfur separation scavenging operations, Z-2003 g/t is added, concentrate obtained by each copper-sulfur separation scavenging returns to the previous cycle operation in sequence, and tailings obtained by the last copper-sulfur separation scavenging are sulfur concentrate; and (3) carrying out two-time concentration operation on the copper rough concentrate, respectively adding 200g/t and 100g/t of calcium hypochlorite to carry out two-time copper concentration, wherein the second concentrate (foam product) of the copper concentration is the second copper concentrate, and the concentration tailings are sequentially returned to the previous cycle operation.
Experiment 2
Crushing raw ore, and mixing with water according to the weight ratio of 2: 1 proportion is fed into a mill to grind the ore until the fineness of the product is-0.074 mm and accounts for 70 percent, and the pH value of the ore pulp is 5-7; adding butyl xanthate at a ratio of 100g/t and terpineol oil at a ratio of 30g/t, carrying out total-sulfur mixed flotation roughing, carrying out primary blank concentration on the obtained concentrate (foam product), obtaining mixed flotation concentrate, adding butyl xanthate at a ratio of 50g/t and terpineol oil at a ratio of 10g/t on the obtained tailings, stirring for 2 minutes and 1 minute respectively, and carrying out total-sulfur mixed flotation first. Returning the concentrate (foam product) obtained in the first step of the all-sulfur mixed flotation scavenging to the previous cycle operation, adding 40g/t of butyl xanthate and 10g/t of pine oil into the obtained tailings, stirring for 2 minutes and 1 minute respectively, and then performing second step of the all-sulfur mixed flotation scavenging. And returning the concentrate (foam product) obtained by the second all-sulfur mixed floating scavenging operation to the previous cycle operation, wherein the obtained tailings are all-sulfur mixed floating tailings. Adding 3000g/t of lime and 1000g/t of calcium hypochlorite into the flotation concentrate, stirring for 3 minutes, adjusting the pH value of ore pulp to 9-10, adding 10g/t of Z-200, stirring for 2 minutes to carry out copper flotation of the flotation concentrate to obtain concentrate (foam product B) which is copper concentrate I, adding 1000g/t of lime and 300g/t of calcium hypochlorite into the obtained tailings to carry out regrinding operation, and controlling the regrinding degree to be 80% at-0.030 mm. Controlling the pH value of the ore pulp to be 9-10, adding Z-200 to be 10g/t, stirring for 2 minutes, performing copper-sulfur separation roughing operation, enabling copper rough concentrate (foam product) to enter copper fine selection operation, and enabling copper-sulfur separation roughing tailings to enter four copper-sulfur separation scavenging operations. Lime is respectively added in 200g/t, 100g/t and 100g/t in the four copper-sulfur separation scavenging operations, Z-2006 g/t is added, concentrate obtained by each copper-sulfur separation scavenging returns to the previous cycle operation in sequence, and tailings obtained by the last copper-sulfur separation scavenging are sulfur concentrate; and (3) carrying out two-time concentration operation on the copper rough concentrate, respectively adding 200g/t and 100g/t of calcium hypochlorite to carry out two-time copper concentration, wherein the second concentrate (foam product) of the copper concentration is the second copper concentrate, and the concentration tailings are sequentially returned to the previous cycle operation.
The specific process indexes of experiment 1 and experiment 2 are shown in Table 1.
TABLE 1
As can be seen from Table 1, the raw ore of experiment 1 contains Cu 7.03%, Au3.74g/t and S20.22%, and the obtained copper concentrate contains Cu 22.45%, Au 7.29g/t, S40.40%, Cu recovery rate 56.21%, Au recovery rate 34.28% and S recovery rate 35.15%; the copper concentrate II contains 24.73 percent of copper, 9.33g/t of gold, 38.50 percent of sulfur, 40.09 percent of copper recovery rate and 28.41 percent of gold recovery rate. The sulfur recovery rate is 21.69%; the comprehensive recovery rate of copper is 96.30 percent, the gold recovery rate of copper concentrate is 62.68 percent, and the sulfur recovery rate is 56.84 percent; the sulfur concentrate contains 1.13 percent of copper, 6.30g/t of gold and 39.23 percent of sulfur, the recovery rate of gold in the sulfur concentrate is 31.44 percent, and the recovery rate of sulfur is 36.23 percent; the total recovery rate of associated gold is 94.12%.
The raw ore of experiment 2 contains 6.72 percent of Cu, 3.81g/t of Au3.65 percent of S, and the obtained copper concentrate 1 contains 23.71 percent of Cu, 8.34g/t of Au, 39.96 percent of S, 57.58 percent of Cu recovery rate, 35.73 percent of Au recovery rate and 33.18 percent of S recovery rate; copper concentrate 2 contained 26.32% copper, 10.64g/t gold, 38.43% sulfur, 38.62% copper recovery and 27.54% gold recovery. The sulfur recovery rate is 19.28 percent; the comprehensive recovery rate of copper is 96.20 percent, the gold recovery rate of copper concentrate is 63.27 percent, and the sulfur recovery rate is 52.47 percent; the sulfur concentrate contains 1.06% of copper, 6.08g/t of gold and 40.64% of sulfur, the recovery rate of gold in the sulfur concentrate is 30.87%, the recovery rate of sulfur is 39.99%, and the total recovery rate of associated gold is 94.14%.
Various corresponding changes and modifications can be made by those skilled in the art based on the above technical solutions and concepts, and all such changes and modifications should be included in the protection scope of the present invention.
Claims (9)
1. The beneficiation method for efficiently recovering the high-sulfur gold-copper ore is characterized by comprising the following steps of:
s1, grinding: feeding the crushed raw ore and water into a mill for milling until the fineness of the crushed raw ore is-0.074 mm and accounts for 70%;
s2, coarse separation by total sulfur mixed flotation: adding a sulfide ore collecting medicament, namely butyl xanthate, stirring, adding foaming agent, namely pine oil, stirring, then carrying out full-sulfur mixed flotation and rough concentration, feeding the obtained concentrate into mixed flotation and rough concentrate concentration operation, and feeding the obtained tailings into full-sulfur mixed flotation scavenging operation;
s3, floating and roughing concentrate concentration operation: performing blank concentration to obtain concentrate, namely, floating concentrate, wherein the floating concentrate enters into copper fast floating operation of the floating concentrate, and the obtained tailings return to the coarse concentration operation of full-sulfur floating;
carrying out mixed floatation and scavenging on the total sulfur: adding a sulfide ore collecting medicament, namely butyl xanthate, stirring, adding a foaming agent, namely pine oil, stirring, then carrying out first all-sulfur mixed flotation and scavenging, returning the obtained concentrate to the first all-sulfur mixed flotation and roughing operation, and feeding the obtained tailings to the second all-sulfur mixed flotation and scavenging operation;
s4, carrying out a second operation of full-sulfur mixed floating and scavenging: adding a sulfide ore collecting agent butyl xanthate and stirring, adding a foaming agent pinitol oil and stirring, then carrying out second all-sulfur mixed flotation and scavenging, returning the obtained concentrate to first all-sulfur mixed flotation and scavenging operation, and obtaining tailings which are all-sulfur mixed flotation tailings;
carrying out mixed flotation concentrate copper fast flotation operation: feeding minerals participating in mixed flotation concentrate copper fast flotation operation into a flotation machine, adding lime and an oxidant calcium hypochlorite into the flotation machine, stirring, adding a collecting agent Z-200, stirring, then carrying out mixed flotation concentrate copper fast flotation to obtain concentrate I, and grinding the obtained tailings; adding 1500-3000g of lime, 500-1000g of oxidant calcium hypochlorite and 5-10g of collecting agent Z-200 into each ton of minerals according to the dry weight of the minerals participating in the mixed floating concentrate copper fast floating operation;
s5, regrinding: the tailings obtained by the mixed flotation concentrate copper fast flotation operation enter regrinding operation, lime and calcium hypochlorite are added into a mill, the regrinding degree is controlled to be minus 0.030mm and accounts for 80%, and the obtained regrinding product enters copper-sulfur separation roughing operation;
s6, copper and sulfur separation and roughing operation: adding Z-200, stirring, carrying out copper-sulfur separation, feeding the obtained copper rough concentrate into copper concentration operation, and feeding tailings into copper-sulfur separation scavenging operation;
s7, copper and sulfur separation and scavenging: performing four copper-sulfur separation scavenging on the tailings obtained in the step S6, and adding lime and a collecting agent Z-200 in the four copper-sulfur separation scavenging; returning the concentrate obtained by the first copper-sulfur separation scavenging to the copper-sulfur separation roughing operation, and returning the concentrate obtained by the last copper-sulfur separation scavenging operation; the tailings obtained by each copper-sulfur separation scavenging enter the next copper-sulfur separation scavenging, and the tailings obtained by the last copper-sulfur separation scavenging are sulfur concentrate;
copper fine selection operation: carrying out copper concentration operation twice, returning tailings obtained in the first copper concentration operation to enter copper-sulfur separation roughing operation, and feeding obtained concentrate to the second copper concentration operation; the concentrate obtained by the second copper concentration operation is copper concentrate II, and the obtained tailings return to the first copper concentration operation; calcium hypochlorite is added in the two copper concentration operations.
2. The method according to claim 1, wherein in step S1, the ratio of raw ore to water is 2: 1.
3. the method of claim 1, wherein in step S2, the amount of the butyl xanthate and the amount of the pine oil are 80-100g butyl xanthate and 15-30g pine oil per ton mineral, respectively, based on the dry weight of the minerals involved in the whole sulfur flotation.
4. The method according to claim 1, wherein in the first operation of the all-sulfur mixed flotation and scavenging of step S3, the dosage of the butyl xanthate and the pine oil is 40-50g of butyl xanthate and 5-10g of pine oil per ton of mineral respectively based on the dry weight of the mineral participating in the first operation of the all-sulfur mixed flotation and scavenging.
5. The method according to claim 1, wherein in the second all-sulfur mixed flotation and scavenging operation of the step S4, the dosage of the butyl xanthate and the pine oil is respectively 20-40g of the butyl xanthate and 5-10g of the pine oil per ton of the mineral according to the dry weight of the mineral participating in the second all-sulfur mixed flotation and scavenging operation.
6. The method as claimed in claim 1, wherein in the regrinding operation of step S5, 1000-1500g lime and 300-600g calcium hypochlorite are added per ton of tailings obtained in the mixed flotation concentrate copper fast flotation operation based on the dry weight of the tailings obtained in the mixed flotation concentrate copper fast flotation operation.
7. The method of claim 1, wherein the copper sulphur separation roughing operation of step S6 is performed with an addition of 5-10g Z-200 per ton of minerals based on dry weight of minerals involved in the copper sulphur separation roughing operation.
8. The method according to claim 1, wherein in the copper-sulfur separation and scavenging operation of the step S7, in four copper-sulfur separation and scavenging processes according to the dry weight of minerals participating in each copper-sulfur separation and scavenging process, the addition amount of lime is respectively 200g, 100g and 100g for each ton of minerals, and the addition amount of Z-200 is 3-6g Z-200 for each ton of minerals.
9. The method of claim 1, wherein the copper concentration operation of step S7, in the first copper concentration operation, comprises adding 200g of calcium hypochlorite per ton of minerals based on dry weight of minerals participating in the first copper concentration operation; in the second copper concentration operation, 100g of calcium hypochlorite is added per ton of minerals based on the dry weight of the minerals participating in the second copper concentration operation.
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| CN112934476A (en) * | 2021-02-02 | 2021-06-11 | 江西理工大学 | Beneficiation method for recovering copper and sulfur from copper-tungsten polymetallic ore |
| CN113351360B (en) * | 2021-06-08 | 2023-11-17 | 安徽马钢罗河矿业有限责任公司 | Mineral separation method of high-sulfur magnetite ore with low-grade copper |
| CN113333153B (en) * | 2021-07-15 | 2023-04-25 | 紫金矿业集团股份有限公司 | Ore dressing method for fine-grained chalcopyrite in plateau area |
| CN113617515B (en) * | 2021-08-11 | 2022-08-12 | 紫金矿业集团股份有限公司 | Activating agent for improving recovery rates of copper and associated gold in copper ore, and preparation and application thereof |
| CN113856911B (en) * | 2021-09-28 | 2023-06-23 | 中国恩菲工程技术有限公司 | Beneficiation method for high-sulfur copper gold and silver ore |
| CN115106190B (en) * | 2022-07-26 | 2023-05-23 | 矿冶科技集团有限公司 | Beneficiation method for high-sulfur gold-containing mixed copper ore |
| CN115672567B (en) * | 2022-09-13 | 2025-02-21 | 江西理工大学 | Method for separating chalcopyrite, sphalerite and pyrite based on surface oxidation |
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