CN115921124B - Flotation collector for refractory gold ore and its preparation method and application - Google Patents
Flotation collector for refractory gold ore and its preparation method and application Download PDFInfo
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- CN115921124B CN115921124B CN202211590677.6A CN202211590677A CN115921124B CN 115921124 B CN115921124 B CN 115921124B CN 202211590677 A CN202211590677 A CN 202211590677A CN 115921124 B CN115921124 B CN 115921124B
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- 239000010931 gold Substances 0.000 title claims abstract description 140
- 238000005188 flotation Methods 0.000 title claims abstract description 118
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 117
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 117
- 238000002360 preparation method Methods 0.000 title claims abstract description 28
- 239000003814 drug Substances 0.000 claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims abstract description 19
- JKIGHOGKGARVAG-UHFFFAOYSA-N 3-phenyl-1h-benzimidazole-2-thione Chemical compound S=C1NC2=CC=CC=C2N1C1=CC=CC=C1 JKIGHOGKGARVAG-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000004094 surface-active agent Substances 0.000 claims abstract description 14
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 12
- 239000003513 alkali Substances 0.000 claims abstract description 11
- 239000004088 foaming agent Substances 0.000 claims abstract description 10
- 239000013530 defoamer Substances 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims description 56
- 238000000034 method Methods 0.000 claims description 40
- 230000008569 process Effects 0.000 claims description 29
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical group CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 claims description 13
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 9
- 229920001219 Polysorbate 40 Polymers 0.000 claims description 4
- 229920001214 Polysorbate 60 Polymers 0.000 claims description 4
- SMVRDGHCVNAOIN-UHFFFAOYSA-L disodium;1-dodecoxydodecane;sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O.CCCCCCCCCCCCOCCCCCCCCCCCC SMVRDGHCVNAOIN-UHFFFAOYSA-L 0.000 claims description 4
- 150000002191 fatty alcohols Chemical class 0.000 claims description 4
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 4
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 4
- 239000000244 polyoxyethylene sorbitan monooleate Substances 0.000 claims description 4
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 claims description 4
- 239000000249 polyoxyethylene sorbitan monopalmitate Substances 0.000 claims description 4
- 235000010483 polyoxyethylene sorbitan monopalmitate Nutrition 0.000 claims description 4
- 239000001818 polyoxyethylene sorbitan monostearate Substances 0.000 claims description 4
- 235000010989 polyoxyethylene sorbitan monostearate Nutrition 0.000 claims description 4
- 229940101027 polysorbate 40 Drugs 0.000 claims description 4
- 229940113124 polysorbate 60 Drugs 0.000 claims description 4
- 229920000053 polysorbate 80 Polymers 0.000 claims description 4
- 229940068968 polysorbate 80 Drugs 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- BWDBEAQIHAEVLV-UHFFFAOYSA-N 6-methylheptan-1-ol Chemical compound CC(C)CCCCCO BWDBEAQIHAEVLV-UHFFFAOYSA-N 0.000 claims description 3
- 229910019142 PO4 Inorganic materials 0.000 claims description 3
- 229920001213 Polysorbate 20 Polymers 0.000 claims description 3
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 3
- 239000010452 phosphate Substances 0.000 claims description 3
- 239000000256 polyoxyethylene sorbitan monolaurate Substances 0.000 claims description 3
- 235000010486 polyoxyethylene sorbitan monolaurate Nutrition 0.000 claims description 3
- 229940068977 polysorbate 20 Drugs 0.000 claims description 3
- 239000010665 pine oil Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 20
- 238000011084 recovery Methods 0.000 abstract description 17
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 8
- 239000006260 foam Substances 0.000 abstract description 7
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 238000005457 optimization Methods 0.000 abstract description 4
- 230000002195 synergetic effect Effects 0.000 abstract description 2
- 239000011859 microparticle Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 14
- 239000003795 chemical substances by application Substances 0.000 description 10
- 239000012141 concentrate Substances 0.000 description 9
- 229940079593 drug Drugs 0.000 description 9
- 229910052500 inorganic mineral Inorganic materials 0.000 description 9
- 239000011707 mineral Substances 0.000 description 9
- 235000010755 mineral Nutrition 0.000 description 9
- DSCFFEYYQKSRSV-UHFFFAOYSA-N 1L-O1-methyl-muco-inositol Natural products COC1C(O)C(O)C(O)C(O)C1O DSCFFEYYQKSRSV-UHFFFAOYSA-N 0.000 description 8
- VJXUJFAZXQOXMJ-UHFFFAOYSA-N D-1-O-Methyl-muco-inositol Natural products CC12C(OC)(C)OC(C)(C)C2CC(=O)C(C23OC2C(=O)O2)(C)C1CCC3(C)C2C=1C=COC=1 VJXUJFAZXQOXMJ-UHFFFAOYSA-N 0.000 description 8
- DSCFFEYYQKSRSV-KLJZZCKASA-N D-pinitol Chemical compound CO[C@@H]1[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)[C@H]1O DSCFFEYYQKSRSV-KLJZZCKASA-N 0.000 description 8
- 239000000839 emulsion Substances 0.000 description 7
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 description 7
- 230000006872 improvement Effects 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
- 239000012991 xanthate Substances 0.000 description 6
- 239000002518 antifoaming agent Substances 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 238000005187 foaming Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 239000010419 fine particle Substances 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- -1 fatty acid salt Chemical class 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- WUOACPNHFRMFPN-UHFFFAOYSA-N alpha-terpineol Chemical group CC1=CCC(C(C)(C)O)CC1 WUOACPNHFRMFPN-UHFFFAOYSA-N 0.000 description 2
- 239000012736 aqueous medium Substances 0.000 description 2
- TUZCOAQWCRRVIP-UHFFFAOYSA-N butoxymethanedithioic acid Chemical compound CCCCOC(S)=S TUZCOAQWCRRVIP-UHFFFAOYSA-N 0.000 description 2
- SQIFACVGCPWBQZ-UHFFFAOYSA-N delta-terpineol Natural products CC(C)(O)C1CCC(=C)CC1 SQIFACVGCPWBQZ-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229940116411 terpineol Drugs 0.000 description 2
- CONMNFZLRNYHIQ-UHFFFAOYSA-N 3-methylbutoxymethanedithioic acid Chemical compound CC(C)CCOC(S)=S CONMNFZLRNYHIQ-UHFFFAOYSA-N 0.000 description 1
- RQINQJTUMGQYOB-UHFFFAOYSA-N 6-methylheptyl dihydrogen phosphate Chemical compound CC(C)CCCCCOP(O)(O)=O RQINQJTUMGQYOB-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- HQABUPZFAYXKJW-UHFFFAOYSA-O butylazanium Chemical compound CCCC[NH3+] HQABUPZFAYXKJW-UHFFFAOYSA-O 0.000 description 1
- 239000002894 chemical waste Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000008396 flotation agent Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007764 o/w emulsion Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- WYPBVHPKMJYUEO-NBTZWHCOSA-M sodium;(9z,12z)-octadeca-9,12-dienoate Chemical compound [Na+].CCCCC\C=C/C\C=C/CCCCCCCC([O-])=O WYPBVHPKMJYUEO-NBTZWHCOSA-M 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 125000000446 sulfanediyl group Chemical group *S* 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 239000007762 w/o emulsion Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
本发明提供了一种难选金矿的浮选捕收剂及其制备方法与应用，浮选捕收剂按重量份计包括25～30份N‑苯基‑2‑巯基苯并咪唑、15～20份酚黑药、7.5～9份表面活性剂、3～4份乳化剂、1～2份碱、1～2份消泡剂、2～3份起泡剂以及70～80份水。采用分开制备溶液Ⅰ和溶液Ⅱ，再将两种溶液充分混匀的制备方法，能有效发挥药剂间的协同作用，得到具有稳定泡沫、强捕收作用和选择性的捕收剂。本发明的浮选捕收剂应用于金矿浮选时，有效地提高了细粒‑微粒金选矿回收率和品位，特别是对低品位、易浮易泥化金矿的粗选预富集和浮选环境的调整优化效果显著；还具有药剂用量小、浮选效果显著、安全环保、市场推广价值高的特点。
The present invention provides a flotation collector for refractory gold ore, and a preparation method and application thereof. The flotation collector includes 25 to 30 parts of N-phenyl-2-mercaptobenzimidazole, 15 to 20 parts of phenol black medicine, 7.5 to 9 parts of surfactant, 3 to 4 parts of emulsifier, 1 to 2 parts of alkali, 1 to 2 parts of defoamer, 2 to 3 parts of foaming agent and 70 to 80 parts of water by weight. The preparation method of preparing solution I and solution II separately and then fully mixing the two solutions can effectively play the synergistic effect between the reagents to obtain a collector with stable foam, strong collection effect and selectivity. When the flotation collector of the present invention is applied to gold ore flotation, it effectively improves the recovery rate and grade of fine-grained and micro-particle gold ore dressing, especially the roughing pre-enrichment of low-grade, easy-floating and easy-mud gold ore and the adjustment and optimization effect of flotation environment are remarkable; it also has the characteristics of small dosage of reagents, remarkable flotation effect, safety and environmental protection, and high market promotion value.
Description
Technical Field
The invention relates to the technical field of gold ore floatation, in particular to a floatation collector for refractory gold ores, a preparation method and application thereof.
Background
In the gold ore floatation industry, thio compounds are often used as collectors, such as butyl xanthate, isopentyl xanthate, and butylammonium black. The gold collector has good floatation indexes for gold Dan Lai with single property, but with the prominent characteristics of 'lean, thin and impurity' of gold ores in recent years, the gold ore grade is reduced year by year, the ore property is more complex, the embedded granularity is thin, the content of impurities such as carbonaceous matters, arsenic and the like is higher, the problems of poor selectivity, weak collection capacity and the like occur in the action process of the gold ore floatation collector, the sorting indexes are further influenced, and the economic benefit of enterprises is reduced.
In order to adapt to the complexity and the difficultness of the existing gold ores, improve the flotation indexes of the gold ores, and simultaneously consider the economic benefit and the environmental protection problem of production units, based on the flotation reagent compounding and assembling theory, numerous researchers in the industry aim at developing novel flotation reagents. For example, the invention patent (application number 202110771617.3) discloses a gold ore composite collector and application thereof, wherein the composite collector comprises main collector xanthate, black powder and fatty acid salt, auxiliary collectors diisooctoate sulfur rids, RA935 and sodium linoleate, the synergistic effect among the collectors is utilized, the collecting effects of gold minerals and gold-containing oxides in quartz pulse-alteration rock type gold ores are improved, but the composite collector has complex medicament components and generated chemical waste liquid is difficult to treat, the composite collector still has certain limitation on the flotation of low-grade and easily-floated easily-slimed gold ores with high current storage quantity, for example, the larger medicament consumption can strengthen the collecting capability of the gold ores and the easily-floated gold ores, the flotation environment is deteriorated, the medicament is difficult to show selectivity, and meanwhile, the coarse gold concentration is relatively low, the circulation quantity of the ores in the closed-circuit production process is possibly increased, so that the grade of the final product is difficult to ensure.
In addition, the novel collecting agents such as Y-89 series, MA xanthate and MB xanthate series high-efficiency gold-separating collecting agents and the like researched in the prior art have the advantages that although a certain application research result is obtained, the collecting performance is generally improved, the selectivity of the agents is reduced, the recovery effect of fine-particle gold is still to be improved, and the collecting agents are influenced by the limited recovery effect of the collecting agents on refractory fine-particle gold when in application, the processes such as repeated roughing, selecting and scavenging are still needed to be carried out in the process, so that the overall recovery rate and grade of gold ores are improved, the process flow is longer, and the flotation efficiency is low.
In view of the foregoing, there is a need for an improved flotation collector for refractory gold ores, and a method for preparing the same and applications thereof, so as to solve the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a flotation collector for refractory gold ores, a preparation method and application thereof, wherein the flotation collector for refractory gold ores is prepared by limiting the components of the flotation collector and adopting a specific preparation method, the flotation collector can effectively solve the problems of poor selectivity and weak collecting capability of conventional xanthate and black gold collectors on fine gold, particulate gold or carbon robbed gold, meanwhile, the recovery rate and grade of fine-particle gold ore dressing can be effectively improved by regulating and controlling the foaming layer, and the method has remarkable effects of coarse-dressing pre-enrichment and floatation environment regulation optimization of low-grade, easily-floating and easily-slimed gold ores, and has the characteristics of small dosage of medicament, safety, environmental protection, wide raw material sources and simple preparation process.
The invention provides a flotation collector for refractory gold ores, which comprises, by weight, 25-30 parts of N-phenyl-2-mercaptobenzimidazole, 15-20 parts of a phenol black drug, 7.5-9 parts of a surfactant, 3-4 parts of an emulsifier, 1-2 parts of alkali, 1-2 parts of a defoaming agent, 2-3 parts of a foaming agent and 70-80 parts of water.
As a further improvement of the invention, the defoaming agent is tributyl phosphate, the foaming agent is terpineol oil, and the phenolic black medicine comprises one or more of No. 15 black medicine, no. 25 black medicine and No. 31 black medicine.
As a further improvement of the present invention, the emulsifier includes one or more of polysorbate 20, polysorbate 40, polysorbate 60, and polysorbate 80.
As a further improvement of the present invention, the surfactant includes one or more of sodium lauryl ether sulfate, sodium fatty alcohol polyoxyethylene ether sulfate, and isooctyl alcohol phosphate.
As a further improvement of the present invention, the base includes one or more of sodium bicarbonate, sodium hydroxide, and potassium hydroxide.
The invention also provides a preparation method of the flotation collector for refractory gold ores, which comprises the following steps:
S1, mixing alkali and water, stirring at 25-35 ℃, sequentially adding N-phenyl-2-mercaptobenzimidazole and a surfactant to obtain a mixture, and continuously stirring to obtain a solution I;
S2, dissolving the emulsion in water, adding 0.3-0.5 times of the total weight of the phenolic black drug under stirring at 30-35 ℃, stirring for 15-20 min, adding the rest phenolic black drug, tributyl phosphate and pinitol oil, and continuing stirring for 1.5-2 h to prepare a milky solution II;
and S3, mixing the solution I prepared in the step S1 and the solution II prepared in the step S2 at 25 ℃, and stirring for 1.5-2 hours to obtain the flotation collector for refractory gold ores.
As a further improvement of the invention, in terms of parts by weight, in step S1, the water is 40-45 parts by weight, and in step S2, the water is 30-40 parts by weight.
As a further improvement of the invention, in the step S2, the stirring is a strong stirring process, and the rotating speed is 600-800 r/min.
As a further improvement of the invention, in the step S1, the stirring time at 25-35 ℃ is 10-15 min, and the stirring time of the mixture is 1.5-2 h.
The invention also provides application of the flotation collector for the refractory gold ores, wherein the flotation collector is applied to a roughing process in the gold ore flotation process, and the addition amount of the flotation collector is 100-200 g/t.
The beneficial effects of the invention are as follows:
1. The invention provides a flotation collector for refractory gold ores, a preparation method and application thereof, wherein the flotation collector consists of N-phenyl-2-mercaptobenzimidazole, phenol black, a surfactant, an emulsifying agent, alkali, a defoaming agent, a foaming agent and water, the flotation collector for refractory gold ores is prepared by limiting the components and the content of the flotation collector and adopting a specific preparation method. The gold ore flotation collector effectively solves the problems of poor selectivity and weak collecting capacity of the conventional xanthate and black drug gold collectors on fine gold, particulate gold or carbon robbed gold, and simultaneously effectively improves the recovery rate and grade of fine gold-particulate gold ore dressing by regulating and controlling a foaming layer, and has the characteristics of remarkable adjustment and optimization effects on roughing pre-enrichment and flotation environment of low-grade, easily-floated and easily-mud gold ores, small dosage of medicament, safety, environmental protection, wide raw material sources, simple preparation process and small environmental pollution, and has good market popularization value.
2. According to the preparation method of the flotation collector for the refractory gold ore, the solution I and the solution II are prepared respectively, the surface active agent in the solution I can effectively reduce the surface tension and the surface free energy of N-phenyl-2-mercaptobenzimidazole in water and enhance the surface activity of a medicament, the emulsifying agent in the solution II can effectively reduce the interfacial tension of a phenol black medicament, an O/W type emulsion is formed under the strong stirring effect, the surface tension of the medicament is further reduced after the phenol black medicament, tributyl phosphate and the pinitol oil are continuously added, the oil substances are rapidly dispersed in an aqueous medium in the form of small liquid drops through the emulsification effect, the W/O type emulsion is formed through the action of a period of time, the surface of the liquid drops is formed due to the adsorbed redundant charges, and the stability of a mixed system is improved. The flotation collector prepared by fully and uniformly mixing the two solutions can effectively play a role in synergy among the agents, and the collision probability and the surface adsorption effect of the collector and the target minerals are enhanced.
3. According to the invention, tributyl phosphate and pinitol oil are mixed into the O/W emulsion in proportion, so that the flotation foam state can be obviously adjusted when gold ore with easy flotation and easy mud formation and high ore mud sensitivity is subjected to flotation, the stability, richness and selectivity of flotation foam are effectively ensured, the prepared gold flotation collector has higher selectivity and stronger collecting capacity on gold ore, the flotation foam is stable and firm, the upward flotation rate of fine-particle gold ore is accelerated, excellent flotation indexes are obtained, and particularly, when the Au grade of raw ore is low, the flotation collector shows good ore adaptability.
4. The flotation collector for the gold ores difficult to separate can be prepared at normal temperature and normal pressure, has simple process and good solubility, overcomes the defects of large pungent odor, large medicament dust, difficult configuration and addition and the like of the conventional gold ore flotation collector for the xanthate, and has the advantages of small medicament consumption and remarkable flotation effect.
5. The flotation collector is mainly used for flotation operation of the gold ore with low grade of raw ore and easy flotation and easy mud, the selectivity of the flotation collector to gold is enhanced by modifying and strengthening a mineralized foam layer, the roughing enrichment ratio is remarkably improved on the premise of keeping the stronger collection of the flotation agent, the circulation of the easy flotation gangue in a fine selection section is reduced, the dosage of the agent is reduced, and in addition, the related agent in the scheme has low price and wide sources and is green and environment-friendly.
Drawings
FIG. 1 is a schematic diagram of the application flow of the flotation collector for refractory gold ores of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
It should be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and/or processing steps closely related to aspects of the present invention are shown in the drawings, and other details not greatly related to the present invention are omitted.
In addition, it should be further noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The flotation collector for refractory gold ores comprises, by weight, 25-30 parts of N-phenyl-2-mercaptobenzimidazole, 15-20 parts of phenol black, 7.5-9 parts of a surfactant, 3-4 parts of an emulsifier, 1-2 parts of alkali, 1-2 parts of a defoaming agent, 2-3 parts of a foaming agent and 70-80 parts of water. The flotation collector for refractory gold ores effectively solves the problems of poor selectivity and weak collecting capacity of conventional xanthate and black gold collectors on fine gold, fine gold or carbon robbed gold, and simultaneously effectively improves the recovery rate and grade of fine gold-fine gold ore dressing by regulating and controlling a foaming layer, and has the characteristics of remarkable adjustment and optimization effects on roughing pre-enrichment and flotation environment of low-grade, easily-floated and easily-slimed gold ores, small medicament dosage, safety, environmental protection, wide raw material sources, simple preparation process and small environmental pollution, and has good market popularization value.
Specifically, the defoaming agent is tributyl phosphate, the foaming agent is terpineol oil, and the phenol black medicine comprises one or more of No. 15 black medicine, no. 25 black medicine and No. 31 black medicine. The emulsifier comprises one or more of polysorbate 20, polysorbate 40, polysorbate 60, and polysorbate 80. The surfactant comprises one or more of sodium laurylether sulfate, sodium fatty alcohol polyoxyethylene ether sulfate and isooctyl alcohol phosphate. The alkali comprises one or more of sodium bicarbonate, sodium hydroxide and potassium hydroxide.
The prepared gold flotation collector has higher selectivity and stronger collecting capacity on gold minerals, the flotation foam is stable and firm, the floating rate of fine-fraction gold minerals is accelerated, excellent flotation indexes are obtained, and particularly when the grade of raw ore Au is lower, the flotation collector shows good ore adaptability.
The preparation method of the flotation collector for refractory gold ores comprises the following steps:
S1, mixing alkali and water, stirring at 25-35 ℃, sequentially adding N-phenyl-2-mercaptobenzimidazole and a surfactant to obtain a mixture, and continuously stirring to obtain a solution I;
S2, dissolving the emulsion in water, adding 0.3-0.5 times of the total weight of the phenolic black drug under stirring at 30-35 ℃, stirring for 15-20 min, adding the rest phenolic black drug, tributyl phosphate and pinitol oil, and continuing stirring for 1.5-2 h to prepare a milky solution II;
and S3, mixing the solution I prepared in the step S1 and the solution II prepared in the step S2 at 25 ℃, and stirring for 1.5-2 hours to obtain the flotation collector for refractory gold ores.
Specifically, in the step S1, the weight part of water is 40-45 parts, the stirring time at 25-35 ℃ is 10-15 min, and the stirring time of the mixture is 1.5-2 h. The surfactant in the solution I can effectively reduce the surface tension and the surface free energy of the N-phenyl-2-mercaptobenzimidazole in water, and enhance the surface activity of the medicament.
In the step S2, the weight part of water is 30-40 parts, the stirring is a strong stirring process, and the rotating speed is 600-800 r/min. The emulsifier in the solution II can effectively reduce the interfacial tension of the phenol black drug, O/W emulsion (oil-in-water emulsion) is formed under the strong stirring effect, the surface tension of the medicament is further reduced after the phenol black drug, tributyl phosphate and pinitol oil are continuously added, the oil substances are rapidly dispersed in an aqueous medium in the form of small liquid drops through emulsification, the W/O emulsion (water-in-oil emulsion) is formed after a period of time, and an electric double layer is formed on the surface of the liquid drops due to the adsorbed redundant charges, so that the stability of a medicament system is improved.
In the preparation method, the solution I and the solution II are prepared separately, so that the surface activity of the prepared reagent is higher, the collision effect of the reagent in the preparation process is avoided, the reagent system is more stable, and the flotation collector prepared by fully and uniformly mixing the two solutions can effectively play a role in synergy among the reagents, enhance the collision probability and the surface adsorption effect of the collector and the target mineral, and obtain the gold mine collector with strong collecting effect and selectivity.
The invention also provides application of the flotation collector for the refractory gold ores, wherein the flotation collector is applied to a roughing process of a gold ore flotation process, the addition amount of the flotation collector is 100-200 g/t, and the addition amount of the flotation collector is specifically 1 ton of raw ore dry basis and 100-200 g of the flotation collector can be added. The collector has good foaming capacity, high selectivity and strong collecting capacity for gold minerals, is applied to the field of gold ore floatation, and effectively solves the problems of low Au grade, complex ore properties and low floatation recovery rate of refractory gold ores with high carbonaceous matter content.
In the actual gold ore flotation process, not only the flotation collector provided by the invention is added, but also other types of medicaments are matched according to the types of raw ores or the requirements of products to perform flotation on the gold ores so as to obtain the products meeting the requirements.
Example 1
Embodiment 1 provides a preparation method of a flotation collector for refractory gold ores and application of the flotation collector, wherein the preparation method specifically comprises the following steps of:
S1, mixing 2 parts of sodium hydroxide with 40 parts of water, stirring for 15min at 25 ℃, sequentially adding 25 parts of N-phenyl-2-mercaptobenzimidazole and 4 parts of sodium lauryl ether sulfate to obtain a mixture, and continuously stirring for 1.5h to obtain a solution I;
S2, dissolving 3 parts of polysorbate 80 in 35 parts of water at a temperature of 35 ℃, starting strong stirring, adding 5 parts of No.25 black medicine while stirring at a stirring speed of 800r/min, adding 10 parts of No.25 black medicine, 2 parts of tributyl phosphate and 2 parts of pinitol oil after stirring for 15min, and continuing stirring for 1.5h to prepare a milky solution II;
and S3, mixing the solution I prepared in the step S1 and the solution II prepared in the step S2 at 25 ℃ and stirring for 2 hours to obtain the flotation collector for refractory gold ores.
Referring to FIG. 1, the flotation collector for refractory gold ore is applied to the roughing process of the gold ore flotation process, and the addition amount of the flotation collector is 100g/t. The raw ore is Yunnan certain high-carbon quartz pulse type gold ore with the grade of 1.88g/t, and the specific process flow is shown in figure 1.
Comparative example 1
Comparative example 1 the same grade high carbon quartz vein type gold ore of example 1 was subjected to flotation, butyl xanthate was used as gold collector in roughing, and the process flow was the same as in example 1.
Comparative example 2
Comparative example 2 provides a method for preparing a flotation collector for refractory gold ores and application of the flotation collector, which is different from example 1 in that a solution is not prepared in steps, all raw materials are directly mixed at 25 ℃ to prepare the flotation collector, and the rest is substantially the same as example 1, and is not repeated herein.
Comparative example 3
Comparative example 3 provides a method for preparing a flotation collector for refractory gold ores and application of the flotation collector, which is different from example 1 in that 2 parts of tributyl phosphate is not added in step S2, and the rest is substantially the same as example 1, and is not repeated here.
After the collectors of example 1 and comparative examples 1 to 3 were applied to gold ore flotation, the Au rough concentrate yield, grade and Au recovery were measured, and the results obtained are shown in the following table.
Table 1 index detection results of example 1 and comparative examples 1 to 3
| Name of the name | Au rough concentrate yield/% | Au grade (g/t) | Au recovery/% |
| Example 1 | 8.12 | 19.81 | 89.29 |
| Comparative example 1 | 9.78 | 15.36 | 86.62 |
| Comparative example 2 | 9.45 | 16.51 | 87.57 |
| Comparative example 3 | 10.34 | 14.97 | 88.78 |
As shown in Table 1, the grade of the Au rough concentrate and the recovery rate of Au are highest in the example 1, compared with the comparative example 1, the grade of the Au rough concentrate is higher than 19g/t, the recovery rate of Au is improved by about 3%, the yield of the Au rough concentrate is lower, the yield of the Au rough concentrate is higher, the Au grade and the recovery rate of Au are higher, the gold collecting agent obtained by the preparation method of the example 1 of the invention shows higher selectivity and higher collecting capacity for gold minerals, and the tributyl phosphate adopted by the invention can promote flotation foam to be stably compacted and accelerate the floating rate of fine-fraction gold minerals in combination with the comparative example 3.
Example 2
Embodiment 2 provides a preparation method of a flotation collector for refractory gold ores and application of the flotation collector, wherein the preparation method specifically comprises the following steps:
s1, mixing 2 parts of sodium bicarbonate with 45 parts of water, stirring for 10min at 30 ℃, sequentially adding 30 parts of N-phenyl-2-mercaptobenzimidazole and 4 parts of fatty alcohol polyoxyethylene ether sodium sulfate to obtain a mixture, and continuously stirring for 2h to obtain a solution I;
s2, dissolving 4 parts of polysorbate 60 in 30 parts of water at a temperature of 30 ℃, starting strong stirring, adding 8 parts of No. 15 black medicine while stirring at a stirring speed of 700r/min, adding 10 parts of No. 15 black medicine, 1 part of tributyl phosphate and 3 parts of pinitol oil after stirring for 15min, and continuing stirring for 1.5h to prepare a milky solution II;
And S3, mixing the solution I prepared in the step S1 and the solution II prepared in the step S2 at 25 ℃ and stirring for 1.5h to obtain the flotation collector for refractory gold ores.
S4, applying the flotation collector of the refractory gold ore to the roughing process of the gold ore flotation process with the same grade as that of the embodiment 1, wherein the addition amount of the flotation collector is 100g/t.
Example 3
Embodiment 3 provides a preparation method of a flotation collector for refractory gold ores and application of the flotation collector, wherein the preparation method specifically comprises the following steps:
s1, mixing 6 parts of potassium hydroxide with 40 parts of water, stirring for 15min at 25 ℃, sequentially adding 25 parts of N-phenyl-2-mercaptobenzimidazole, 2 parts of sodium polyoxyethylene fatty alcohol sulfate and 2 parts of isooctanol phosphate to obtain a mixture, and continuously stirring for 2h to obtain a solution I;
S2, dissolving 3 parts of polysorbate 40 in 30 parts of water at a temperature of 30 ℃, starting strong stirring, adding 8 parts of No. 31 black medicine while stirring at a stirring speed of 800r/min, adding 10 parts of No. 31 black medicine, 2 parts of tributyl phosphate and 3 parts of pinitol oil after stirring for 15min, and continuing stirring for 1.5h to prepare a milky solution II;
And S3, mixing the solution I prepared in the step S1 and the solution II prepared in the step S2 at 25 ℃ and stirring for 1.5h to obtain the flotation collector for refractory gold ores.
S4, applying the flotation collector of the refractory gold ore to the roughing process of the gold ore flotation process with the same grade as that of the embodiment 1, wherein the addition amount of the flotation collector is 100g/t.
After the collectors prepared in examples 2 to 3 were applied to gold ore flotation, the yield, grade and recovery rate of Au rough concentrate were measured, and the obtained results are shown in the following table.
Table 2 index detection results of examples 2 to 3
| Name of the name | Au rough concentrate yield/% | Au grade (g/t) | Au recovery/% |
| Example 2 | 8.58 | 19.04 | 90.15 |
| Comparative example 3 | 8.18 | 19.53 | 89.39 |
As can be seen from Table 2, the flotation collector prepared by the invention can obtain high-grade Au rough concentrate by adding a small amount of medicament when being applied to gold ore flotation, and improves the recovery rate of Au, so that the pressure of the subsequent process in the gold ore flotation process can be reduced, or the subsequent redundant process flow can be shortened, the flotation efficiency is accelerated, and the process cost is reduced.
In summary, the invention provides a flotation collector for refractory gold ores, a preparation method and application thereof, wherein the flotation collector consists of N-phenyl-2-mercaptobenzimidazole, phenol black drug, surfactant, emulsifier, alkali, defoamer, foaming agent and water, and the refractory gold ores are prepared by limiting the components and the content of the flotation collector and adopting a specific preparation method. The flotation collector has the advantages of good foaming capacity, high selectivity and strong collection capacity for gold minerals, effectively solves the problems of low Au grade, complex ore properties and low flotation recovery rate of refractory gold ores with high carbonaceous content, and has the characteristics of small dosage of agents, safety, environmental protection, wide raw material sources, simple preparation process and low environmental pollution during application, and has good market popularization value.
The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention.
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