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CN-116273484-B - Collector and copper sulfide ore flotation process

CN116273484BCN 116273484 BCN116273484 BCN 116273484BCN-116273484-B

Abstract

The invention provides a collector and a flotation process of copper sulfide ores. The collecting agent comprises, by weight, 100 parts of a thiourethane compound, 10-20 parts of (methyl) benzotriazole (sodium) and 10-20 parts of a cosolvent. In the flotation operation, (methyl) benzotriazole (sodium) can perform adsorption and chelation with active copper atoms or copper ions on the surface of copper sulfide ore, so that a layer of hydrophobic protective film is formed on the surface of the copper sulfide ore, and the hydrophobicity of the copper sulfide ore is improved. The selectivity of the thiourethane compound to copper sulfide is good. The cosolvent can promote the dissolution and dispersion of the thiourethane compound and the (methyl) benzotriazole (sodium) in the ore pulp. Compared with other ranges, the dosages of the components are limited in the ranges, so that the synergistic effect of the three components is brought into play, the collecting capacity of the collecting agent and the hydrophobicity of copper sulfide ore are improved, and further the copper recovery rate is improved on the premise of ensuring the grade of copper concentrate.

Inventors

  • LIU ZHIGUO
  • YU CHUANBING
  • KANG JINXING
  • WANG CHUANLONG
  • WANG XIN
  • WANG YAYUN
  • DENG CHAOAN

Assignees

  • 中国恩菲工程技术有限公司
  • 中国有色工程有限公司

Dates

Publication Date
20260508
Application Date
20230210

Claims (15)

  1. 1. The collecting agent is characterized by comprising, by weight, 100 parts of a thiourethane compound, 10-20 parts of sodium benzotriazole and 10-20 parts of a cosolvent, wherein the thiourethane compound is one or more selected from the group consisting of ethyl-thiourethane, propyl-thiourethane and O-isopropyl-N-ethyl thiourethane, and the cosolvent is one or more selected from the group consisting of polyethylene glycol, glycerol and polyoxyethylene ether.
  2. 2. The collector of claim 1, wherein the polyethylene glycol has a molecular weight of 200-600.
  3. 3. The collector according to claim 1 or 2, wherein the collector comprises, by weight, 100 parts of the thiourethane compound, 15-20 parts of sodium benzotriazole and 10-15 parts of the cosolvent.
  4. 4. A copper sulphide ore flotation process, characterized in that the copper sulphide ore flotation process comprises: Step S1, crushing and grinding the copper sulfide ore to obtain ore pulp; Step S2, mixing the ore pulp, the first collector and the foaming agent, and roughing to obtain roughing copper concentrate and roughing copper tailings; Step S3, concentrating the roughing copper concentrate to obtain copper concentrate, and And step S4, mixing the roughing copper tailings with a second collector and scavenging to obtain tailings and scavenging foam, wherein the first collector is the collector in any one of claims 1 to 3, and the second collector and the first collector can be the same or different.
  5. 5. The flotation process according to claim 4, wherein the slurry comprises mineral particles, the mineral particles having a particle size of less than 0.074mm accounting for 65-75% of the copper sulphide ore by weight.
  6. 6. The process according to claim 4, wherein the slurry has a solids content of 25 to 35wt% based on the total weight of the slurry.
  7. 7. The flotation process according to any one of claims 4 to 6, wherein the weight ratio of the copper sulphide ore, the first collector and the frothing agent is 1 x 10 5 : (4-6): 1.5-3, and the weight ratio of the first collector and the second collector is (4-6): 1-2.
  8. 8. The flotation process for copper sulphide ores according to claim 4, wherein the mixing in step S2 is performed by stirring the material comprising the pulp, the first collector and the frother for 2-4 min.
  9. 9. The flotation process for copper sulphide ores according to claim 4, wherein the foaming agent is selected from methyl isobutyl carbinol and/or pinitol oil.
  10. 10. The copper sulphide ore flotation process according to claim 4 wherein the second collector is the same as the first collector.
  11. 11. The process according to claim 7, wherein the grinding treatment comprises mixing the copper sulphide ore with an inhibitor and adjusting the pH of the slurry to 10-11.
  12. 12. The flotation process according to claim 11, wherein the weight ratio of the depressant to the copper sulphide ore is (5-10) 1 x 10 4 .
  13. 13. The copper sulphide ore flotation process according to claim 11, wherein the depressant is selected from one or more of the group consisting of calcium oxide, calcium hydroxide and sodium hydroxide.
  14. 14. The copper sulfide ore flotation process according to claim 11, wherein step S3 further comprises sequentially performing first concentration and second concentration on the rougher copper concentrate to obtain copper concentrate, and step S4 further comprises mixing the rougher copper tailings with the second collector and sequentially performing first scavenging and second scavenging to obtain tailings and scavenging foam.
  15. 15. The copper sulphide ore flotation process according to claim 14, wherein the scavenger froth is recycled in step S4 or step S2.

Description

Collector and copper sulfide ore flotation process Technical Field The invention relates to the technical field of mineral separation, in particular to a collector and a flotation process of copper sulfide ores. Background Copper is a nonferrous metal closely related to human beings, and is widely applied to the fields of electric, light industry, national defense industry and the like. Copper sulfide ore is an important copper resource, and a flotation method is mostly adopted for enrichment and recovery. At present, agents such as xanthate, black powder, sulfur nitrogen, thiourethane and the like are used as a collector of copper sulfide ores. The xanthate has wide application, strong collecting capacity, but poor selectivity, and the black medicine and thiourethane collecting agents have good selectivity and relatively good copper collecting effect. Because of the limitations of single collectors, researchers have exploited the synergistic effect between agents to develop many combined collectors to increase selectivity to copper ores and collector capacity. For example, the prior art adopts xanthate diester, butylammonium black drug and a regulator as copper mineral collectors, the prior art compounds the ethylsulfanilamide, the diethylamino dithio ethyl formate and the butyl xanthate as copper combined collectors, and the prior art (publication No. CN 109158217A) adopts dialkyl phosphate, octyl phenol polyoxyethylene ether, polyoxyethylene stearate, triethylene tetramine, o-hydroxybenzoic acid and an activator as copper mineral collectors, and has the advantages of strong collector capability and good selectivity. Although the prior documents show the effects and advantages of combined medication, some medicaments have too complex formulation, and some medicaments have strong capability of collecting agents after being compounded, but the selectivity is reduced. Therefore, there is a need to develop a collector for satisfying both the improvement of the collecting capacity and the improvement of the selectivity, which is important for improving the grade of copper concentrate and the recovery rate of copper. Disclosure of Invention The invention mainly aims to provide a collector and a flotation process of copper sulfide ores, so as to solve the problem that the collector and the flotation process in the prior art are difficult to simultaneously improve the grade of copper concentrate and the recovery rate of copper. In order to achieve the purpose, the invention provides a collecting agent which comprises, by weight, 100 parts of a thiourethane compound, 10-20 parts of (methyl) benzotriazole (sodium) and 10-20 parts of a cosolvent. Further, the thiourethane compound is selected from one or more of the group consisting of ethyl-thiourethane, propyl-thiourethane and O-isopropyl-N-ethylthiourethane, and the cosolvent is selected from one or more of the group consisting of polyethylene glycol, glycerol and polyoxyethylene ether. Further, the molecular weight of the polyethylene glycol is 200-600. Further, the collecting agent comprises, by weight, 100 parts of a thiourethane compound, 15-20 parts of (methyl) benzotriazole (sodium) and 10-15 parts of a cosolvent. In order to achieve the aim, the invention also provides a flotation process of copper sulfide ore, which comprises the steps of S1, S2, mixing and roughing materials comprising ore pulp, a first collector and a foaming agent to obtain roughed copper concentrate and roughed copper tailings, S3, concentrating the roughed copper concentrate to obtain copper concentrate, and S4, mixing and scavenging the roughed copper tailings with a second collector to obtain tailings and scavenging foam, wherein the first collector is the collector in any one of claims 1 to 4, and the second collector is the same as or different from the first collector. Further, the ore pulp comprises mineral particles, and the mineral particles with the particle size smaller than 0.074mm account for 65-75% of the copper sulfide ore in percentage by weight. Further, the solid content of the ore pulp is 25-35 wt% based on the total weight of the ore pulp. Further, the weight ratio of the copper sulfide ore to the first collector to the foaming agent is 1×10 5 (4-6) (1.5-3), the weight ratio of the first collector to the second collector is (4-6) (1-2), preferably, the materials comprising ore pulp, the first collector and the foaming agent are stirred in the mixing process in the step S2, wherein the stirring time is 2-4 min, preferably, the foaming agent is selected from methyl isobutyl methyl alcohol and/or pine alcohol oil, and preferably, the second collector is the same as the first collector. Further, the ore grinding treatment process comprises the steps of mixing copper sulfide ore with an inhibitor, and adjusting the pH of ore pulp to 10-11, wherein the weight ratio of the inhibitor to the copper sulfide ore is preferably (5-10) 1×10 4, and the inhibitor is preferably one