35 results about "Galena" patented technology

The present invention discloses a flotation separation method for inhibiting molybdenite and galena in the flotation of chalcopyrite, realizing the efficient separation of chalcopyrite from molybdenite and galena, and belonging to the technical field of mineral separation. During the flotation separation process, under the conditions of a pH of 4 - 10, an inhibitor dosage of 50 - 200 mg / L, a collector Z-200 dosage of 20 - 40 mg / L, and an MIBC / No. 2 oil dosage of 10 - 20 mg / L, a flotation process of first bulk flotation and then concentrate separation is adopted; Quercetin is widely present in nature and is currently mainly used in the food industry and the clinical industry. It can be obtained by plant extraction and is an ideal inhibitor for molybdenite and galena; Under these process conditions, quercetin inhibits the floatability of molybdenite and galena, realizing the effective separation of copper-molybdenum and copper-lead. This method has advantages such as a wide applicable pH range, good separation effect, and environmental friendliness, and has broad prospects for popularization and application.

The present invention discloses a screening method for a collector for the simultaneous enrichment of lead and silver based on coordination chemistry and electrochemistry, comprising: obtaining electrochemical information on the solid-solid interaction between silver minerals and galena; obtaining galena, silver minerals, and their potential target ore-loving groups, and outputting a chk file; analyzing and quantitatively calculating the chk file to obtain orbital shapes and energy level information of the frontier molecular orbitals of the relevant minerals and ore-loving groups; preliminarily determining the target ore-loving groups of the silver minerals; thermodynamically determining whether the preliminarily determined target ore-loving groups have better adsorption properties for silver minerals than other ore-loving groups; and calculating the solvation free energy of derivatives of the target ore-loving groups with different carbon chain lengths and shapes to determine the final ore-loving agent. The present invention combines sulfide mineral flotation electrochemistry with flotation coordination chemistry for the first time, overcoming the limitations of previous agent screening designs and providing a new method for the research and development of special collectors for co-existing rare metal resources.

The invention discloses an organic inhibitor for galena and application of the organic inhibitor. The inhibitor is 3-mercapto-1 sodium propane sulfonate (MPS). Aiming at the characteristics of close copper and lead symbiosis, high iron and zinc content and fine disseminated particle size of raw ore, the method adopts the technological process of'copper and lead partial bulk flotation tailing discarding-bulk concentrate regrinding-copper and lead separation flotation ', and comprises the following steps: firstly, in a bulk flotation section, utilizing a zinc sulfate and sodium sulfite combined reagent to efficiently inhibit sphalerite and pyrite under a weakly alkaline condition; a large number of gangue and zinc-sulfur minerals are thrown away in advance; the method comprises the following steps of: carrying out superfine regrinding dissociation on obtained bulk concentrate, then carrying out separation operation, and in a copper-lead separation section, replacing traditional dichromate with 3-mercapto-1 sodium propane sulfonate (MPS), carrying out a closed-loop process of one-roughing, three-refining and three-sweeping, and supplementing an inhibitor in fine selection operation, so that efficient inhibition of galena and preferable flotation of chalcopyrite are realized. The technological process is rigorous in design, the reagent system is green and environmentally friendly, and the resource recovery rate of the low-grade complex ore is remarkably increased.

The invention discloses a method for flotation separation of galena and sphalerite, and belongs to the technical field of mineral flotation. The method comprises the steps that sodium hypochlorite and manganese sulfate are added into lead-zinc bulk concentrate pulp for an oxidation reaction, filtering is conducted after the reaction, polyvinyl alcohol is added into filter residues for continuous reaction, and treated pulp is obtained; and then a collecting agent and a foaming agent are added, and efficient separation of galena and sphalerite is achieved through the flotation process of one-time roughing, three-time refining and two-time sweeping. Sodium hypochlorite and manganese sulfate have a synergistic effect in ore pulp, a hydrophilic oxide layer and an inorganic film are formed on the surface of the sphalerite, and polyvinyl alcohol further forms a compact organic adsorption layer through hydrogen bonds, so that inhibition on the sphalerite is enhanced. The method can effectively inhibit sphalerite and improve lead-zinc separation selectivity and efficiency, and is especially suitable for separation of complex lead-zinc ore.

The application provides a copper-lead sulfide ore flotation separation inhibitor and a preparation method and application thereof, and belongs to the technical field of ore-dressing reagents. The main components of the inhibitor are maleic acid acrylic acid copolymer, trisodium nitrilotriacetate and sodium sulfite. In the preparation, the maleic acid acrylic acid copolymer, the trisodium nitrilotriacetate and the sodium sulfite are mixed at normal temperature, and then are added into a high-shear emulsifying machine to be emulsified and dispersed, so that a uniform viscous suspension inhibitor is obtained. In the application, after the raw ore is treated, preselected ore slurry is obtained; copper-lead mixed flotation is performed first to obtain copper-lead mixed concentrate and copper-lead tailings; active carbon and sodium sulfide are added into the copper-lead mixed concentrate first, and reagents are added to perform copper-lead separation flotation to obtain copper and lead concentrates. The inhibitor has the advantages of being cheap, easy to obtain and store and environment-friendly. The inhibition effect on galena is good, the copper-lead sulfide ore separation effect is good, and the ore-dressing indexes are effectively improved.

This invention discloses a flotation method for lead-zinc ore to enhance the recovery of fine-grained galena, comprising the following steps: grinding the raw ore finely, adding sulfur inhibitor, zinc inhibitor, lead collector, lead flocculant and frother sequentially, and then flotating to obtain lead concentrate; adding sulfur inhibitor, zinc activator, zinc collector and frother sequentially to the lead tailings, and then flotating to obtain zinc concentrate. This invention features a simple process flow, is easy for industrial production, and is highly adaptable to grinding products containing fine-grained galena. It can improve the flotation recovery rate of fine-grained galena, ensure the quality of zinc concentrate, and obtain better lead-zinc flotation indicators.

An electrochemically mediated, hydrometallurgical method is provided for extraction of nickel, zinc, lead, silver, molybdenum, and / or copper from sulfide minerals. These metal concentrates, such as pentlandite, pyrrhotite, pyrite, sphalerite, galena, Ag2S, MoS2, etc., are contacted with nitric acid and cerium(IV) nitrates, cerium(IV) methanesulfonate, and / or cerium(IV) sulfate, as oxidative leaching agents to preferentially leach the target metals contained therein. The strong oxidizing capacity of cerium(IV) enables rapid dissolution of metal sulfides under ambient conditions. Cerium(IV) can be electrochemically regenerated and recycled for treatment of additional sulfide minerals. Target metal products can be extracted via processes such as solvent extraction and precipitation, enabling complete recovery, e.g., of nickel from pentlandite.

The invention discloses an impurity-reducing and quality-improving flotation method for arsenic-containing and lead-containing low-grade copper ore and application, and the flotation method is specifically used for separating and recycling pyrite minerals of the ore through primary ore grinding, two times of roughing, at least two times of scavenging, secondary ore grinding and at least five times of concentration. Two-stage roughing is matched with staged precise dosing, agent waste is avoided, it is guaranteed that slow-floating target minerals enter fine selection, gangue inclusion is reduced, and the grade and the recovery rate are improved; and a collecting agent hydrophobic membrane on the surface of the mineral is removed through secondary grinding, the monomer dissociation degree is improved, favorable conditions are created for impurity inhibition, and the separation precision is optimized. The high-selectivity copper collecting agent is matched with a lead and sulfur combined inhibitor, the problem that the effect of a single inhibitor is poor is solved, galena, iron sulfide and arsenopyrite are synergistically inhibited, and the content of lead and arsenic is greatly reduced. The agent is nontoxic and environment-friendly, equipment blockage and corrosion are reduced, the wastewater treatment cost and the environmental influence are reduced, and the unification of quality improvement, efficiency improvement, environmental protection and economy is realized.

The present application provides an electrochemical pretreatment method for lead-containing heavy sand, which belongs to the field of hydrometallurgy technology. The present invention uses two-step electrolysis, first electrolyzing NaCl to oxidize the galena in the lead-containing heavy sand and generate lead chloride and elemental sulfur, and then electrolyzing manganese salt to oxidize the metal sulfide in the lead-containing heavy sand, thereby completing the pretreatment of the lead-containing heavy sand. The present invention can adjust the concentration ratio of NaCl and manganese salt in the electrolyte and the voltage in the two-step electrolysis to make NaCl and Mn 2+ The electrolysis is carried out in steps, sequentially reducing the lead in the lead-containing heavy sand and oxidizing the metal sulfides. The pretreatment method of the present invention not only recovers the lead as a resource but also removes the sulfides within it, providing qualified raw materials for subsequent gold smelting. This method features a short process flow, convenient operation, simple equipment, and is environmentally friendly, providing a highly valuable technical solution for the field of precious metal hydrometallurgy.

The invention discloses an efficient flotation inhibitor for galena and pyrite separation and application of the efficient flotation inhibitor. The inhibitor adopts a ternary compound system of modified lignosulfonate, an organic phosphate corrosion inhibitor and an organic reducing agent, and all the components have a synergistic effect. And the used components are low-toxicity or non-toxic organic compounds and do not contain extremely toxic substances such as cyanide and dichromate, so that the alkaline tailing pollution of a high-alkali lime method is avoided, and the green mineral separation requirement is met. During application, efficient separation can be realized under a weak base condition, the pH of ore pulp does not need to be increased to 11 or above, lime consumption is greatly reduced, corrosion and abrasion of equipment are reduced, and meanwhile, the over-inhibition risk of galena is reduced. The dosage of a roughing inhibitor is small, and the total dosage is low due to subsection decrement addition during concentration. And the N, N-diethyldithiocarbamate is adopted as the collecting agent, the agent system is simple, and industrial implementation is easy. The inhibitor still has a good inhibition effect on pyrite activated by copper ions, overcomes the defect of poor adaptability of a traditional high-alkali method, and has strong adaptability to ores with different properties.

The application discloses a lead-copper ore copper-lead separation process, comprising the following steps: S1, raw material pretreatment: crushing and screening the lead-copper ore, screening out the ore material with a particle size of 2-25 mm, and moving the ore material larger than 25 mm and the ore material smaller than 2 mm to other workshops for treatment; S2, water washing and desliming: washing away the redundant silt and stone powder and other impurities on the ore with water flow, and then putting the water-washed ore into an ore gravity separation equipment. Before the lead-copper ore is separated, the raw material of the lead-copper ore is pretreated, the mineral raw material with a particle size of 2-25 mm is selected after crushing and screening, and the mineral raw material is centrifugally separated after water washing and desliming, so that the lead ore and the copper ore can be effectively preliminarily separated, then the lead ore and the copper ore which have been separated are separated again in combination with a flotation process, and separate concentrates are obtained, and through multiple separation, the quality of the copper concentrate and the smelting efficiency can be effectively improved.

The invention relates to a method for improving the galena flotation recovery rate under a grinding system and a verification method thereof, and belongs to the technical field of engineering. A hexagonal prism-shaped grinding medium is adopted to replace a traditional spherical medium to grind galena particles, and under the same crushing result, the galena flotation recovery rate is increased. The hexagonal prism-shaped grinding medium is adopted to grind galena, the medium is in linear contact and surface contact with minerals in the ore grinding process, the effect of grinding the galena can be effectively achieved, meanwhile, the over-crushing phenomenon of the galena is reduced, and ground galena particles have large elongation and certain edges and sharp corners, so that the grinding efficiency is improved, and the grinding quality of the galena is improved. In the flotation process, a bubble hydration layer can be rapidly punctured, the adhesion time of galena mineral particles and bubbles is shortened, and finally the recovery rate of galena is increased.

The present invention belongs to the technical field of water treatment, and particularly relates to a pretreatment method for benzene-containing organic wastewater. In the present invention, the pH value of the feed liquid obtained by mixing benzene-containing organic wastewater, iron-containing sulfide ore and galena is adjusted to acidic. In the acidic solution, O2 undergoes a two-electron reduction reaction on the surface of the iron-containing sulfide ore to generate OH·. H2O is oxidized on the sulfur defects on the surface of the iron-containing sulfide ore, and the Fe 2+ / sulfur intermediate reacts with O2 to also generate OH·. Moreover, the galvanic effect between pyrite and galena is also beneficial to the generation of OH· on the surface of pyrite. The generated OH· can oxidize the benzene-containing organic matter in the wastewater, thereby significantly reducing the content of benzene-containing organic matter in the wastewater.

The application discloses a galena and chalcopyrite mixed concentrate flotation separation inhibitor and a flotation separation method thereof, and belongs to the technical field of mineral flotation. The application provides an inhibitor, which comprises 10-40% of sodium hypochlorite, 10-40% of ferrous sulfate and 10-50% of manganese dichloride combination according to mass percentage. The inhibitor is used under the conditions of pH 4-9, total dosage 0.5-3 kg / t and reaction time 5-8 minutes. After the inhibitor is used in combination with copper-lead mixed concentrate, copper concentrate and lead concentrate are obtained through a flotation process of one roughing and two cleaning, and the separation efficiency reaches 80-95%. The electric reduction regeneration conditions of the inhibitor are as follows: voltage 1.0-5.0 V, reduction time 20 minutes and pH 4-9. After reduction, the combined reagent can be repeatedly used for 5-7 times without additional addition of the combined inhibitor. The combined inhibitor is cheap, is suitable for weakly acidic to alkaline ore pulp, can be regenerated through electric field reduction technology, and thus the purpose of reducing the combined inhibitor is achieved.

The present invention discloses a flotation separation method for galena and chalcopyrite, belonging to the field of mineral flotation technology. The present invention provides a combined depressant, which comprises, by mass percentage, 10%-30% of sodium persulfate, 20%-50% of sodium sulfate, 10%-40% of FeSO4·7H2O, and 20%-30% of CuSO4. Copper and lead concentrates are obtained through a one-coarse, two-fine flotation process. The combined depressant of the present invention is widely available, non-hazardous, inexpensive, and highly adaptable to the pH of the ore pulp. The depressant raw material is regenerated through the action of an electric field, allowing a single feed to be reused seven times, significantly reducing the amount of reagents used.

The present invention relates to a lead-zinc flotation composite collector and a flotation process and application thereof, belonging to the technical field of lead-zinc ore flotation. The composite collector of the present invention comprises a collector A, a collector B and a collector C, wherein the collector A is any one of ethyl xanthate and butyl xanthate, the collector B is any one of ethylthiocarbamate, ethylthiocarbamate and butylamine black medicine or any two thereof, and the collector C is any one of diphenylthiourea and ethylthiourea or any two thereof. The process and application of the composite collector of the present invention in lead-zinc ore flotation realize the recovery of lead-zinc ore through roughing-scavenging-cleaning operations. The present invention increases the collector adsorption amount on the surface of the lead-zinc ore, and can collect not only single sphalerite but also galena.

The invention discloses a polymer-like flocculation flotation method for micro-fine particle lead zinc ore, and relates to the technical field of mineral processing. The polymer-like flocculation flotation method for the micro-fine particle lead-zinc ore comprises the following steps: S1, mixing an ore sample to be treated with water, and pre-stirring to obtain prepared ore pulp; the pH value of the prepared ore pulp is adjusted to be 7-13, and to-be-treated ore pulp is obtained; s2, ferric trichloride is added into the ore pulp to be treated, and first ore pulp is obtained; s3, adding a natural polysaccharide flocculant into the first ore pulp to obtain second ore pulp; s4, polyoxyethylene is added into the second ore pulp, and third ore pulp is obtained; s5, a sulfide mineral collecting agent is added into the third ore pulp, and fourth ore pulp is obtained; s6, a foaming agent is added into the fourth ore pulp, and galena concentrate and tailings are obtained after flotation and foam scraping; wherein the to-be-treated ore sample comprises galena and sphalerite, so that the recovery rate of the galena is effectively increased, and meanwhile, the entrainment recovery rate of the sphalerite is remarkably reduced.

The invention discloses application of acetylthiazole as a collecting agent in separation of copper-lead bulk concentrate, and belongs to the technical field of mineral separation. The method comprises the following steps: firstly, adding activated carbon into the copper-lead bulk concentrate to carry out reagent removal treatment, then adding sodium sulfite as a galena inhibitor, acetylthiazole as a chalcopyrite collecting agent and 2 # oil as a foaming agent, and carrying out one-roughing, three-refining and two-sweeping operation to obtain copper concentrate and lead concentrate; the chalcopyrite collecting agent is acetylthiazole, has good selectivity to chalcopyrite and weak affinity to galena, and can enable the content of galena in copper concentrate to be the lowest and obtain higher copper and lead recovery rates under the condition that the dosage of a galena inhibitor is small.

The invention provides an electrochemical pretreatment method for lead-containing heavy sand, and belongs to the technical field of hydrometallurgy. According to the method, through two-step electrolysis, NaCl is electrolyzed, galena in the lead-containing heavy sand is oxidized, lead chloride and elemental sulfur are generated, then manganese salt is electrolyzed, metal sulfide in the lead-containing heavy sand is oxidized, and pretreatment of the lead-containing heavy sand is completed. According to the method, NaCl and Mn < 2 + > can be electrolyzed step by step by regulating and controlling the concentration proportion of NaCl and manganese salt in the electrolyte and the voltage in two-step electrolysis, and reduction of lead in the lead-containing heavy sand and oxidation of metal sulfide are sequentially achieved. According to the pretreatment method, resource recycling of the lead can be achieved, sulfide in the lead can be removed, qualified raw materials are provided for follow-up gold smelting, the method is short in process, convenient to operate, simple in equipment and environmentally friendly, and a valuable technical scheme is provided for the field of precious metal hydrometallurgy.

The application discloses a high-selectivity copper-lead separation combined inhibitor and application thereof, and belongs to the technical field of mineral processing and non-ferrous metal flotation. The components of the combined inhibitor include sodium periodate and mercaptosuccinic acid, and the mass ratio of the sodium periodate to the mercaptosuccinic acid is 1:3-1:7. The combined inhibitor is composed of the sodium periodate and the mercaptosuccinic acid, is used in the process of separating copper and lead from a lead sulfide ore, and is used for accurately and effectively inhibiting galena, thereby reducing the influence of the combined inhibitor on chalcopyrite flotation, and finally making the lead sulfide ore have excellent flotation separation effect and obtaining high-grade copper and lead concentrates.

The application discloses a copper-lead mixed concentrate separation method and a combined lead inhibitor for copper-lead separation. The method comprises the following steps: using organic carboxylic acid, amino acid polymer and humic acid salt as the combined inhibitor for copper-lead separation, carrying out lead-inhibiting copper floating, and obtaining preliminary copper concentrate and lead concentrate; wherein the ratio of the organic carboxylic acid, the amino acid polymer and the humic acid salt is (3-5):(1-2):1. The combined inhibitor for copper-lead separation is used to carry out lead-inhibiting copper floating, so that the copper mineral recovery rate can be improved and the copper mineral loss rate can be reduced while the lead mineral is inhibited. In addition, the preliminary copper concentrate obtained by floating based on the combined inhibitor for copper-lead separation is classified, and the part below the classified particle size is subjected to lead removal treatment, so that the problem that fine galena is difficult to separate in the lead-inhibiting copper floating process is further solved.

This invention discloses a flotation separation method for collecting galena and inhibiting sphalerite and pyrite, achieving efficient separation of galena from sphalerite and pyrite in a low-alkaline pulp environment, belonging to the field of mineral beneficiation technology. This invention uses N-hydroxyethylethylenediaminetriacetic acid as an inhibitor of sphalerite and pyrite at a low alkalinity of pH 7.5-9.5, and one or two of sodium diethyldithiocarbamate, sodium ethyl xanthate, and xylenol dithiophosphate as collectors for galena. Under low dosage conditions, it achieves simultaneous inhibition of sphalerite and pyrite and effective collection of galena, offering advantages of high efficiency, simple process, economy, and environmental friendliness. It is particularly suitable for silver-bearing, high-sulfur, low-grade lead-zinc ores and has broad application prospects.

The invention discloses a combined collecting agent for flotation separation of lead-zinc sulfide ore and application of the combined collecting agent. The combined collecting agent comprises a pyridine derivative and ethyl xanthate, and the pyridine derivative is one of 2-picolinic acid, 6-methyl-2-picolinic acid, 2-picolinic acid methyl ester and 2, 6-picolinic acid; the combined collecting agent serves as a collecting agent of galena and is used for flotation separation of galena and sphalerite. The method comprises the steps that raw ore is crushed, ground and then mixed, combined inhibitor zinc sulfate and sodium sulfite, a combined collecting agent and a foaming agent are sequentially added into ore pulp for lead flotation operation, and lead concentrate and lead tailings are obtained; an activating agent, a collecting agent and a foaming agent are sequentially added into the lead tailings for zinc flotation operation, and zinc concentrate and zinc tailings are obtained; the combined collecting agent is high in galena selectivity, the use amount of a sphalerite inhibitor can be reduced, meanwhile, the use amount of a subsequent sphalerite activator is reduced, and the beneficiation cost is reduced while the lead-zinc sulfide ore separation effect is improved.

The invention relates to a method for treating gold-antimony-containing resources by utilizing a copper concentrate smelting process, which comprises the following steps: adding the gold-antimony-containing resources into the copper smelting process, finishing high-efficiency recovery of gold by utilizing a good trapping effect of copper matte on gold, and forming a lead-antimony alloy phase by introducing galena and utilizing good affinity of lead to antimony. Separation and recovery of antimony are achieved, and meanwhile the negative influence of antimony on the copper refining process is eliminated. The method is simple in process and easy to operate, the recovery rates of gold and antimony both exceed 95%, and the method has good application prospects.

A method for enriching galena and native gold in the separation of polymetallic sulfide ores includes the following steps: Step 1: First coarse grinding: The sulfide minerals and native gold are initially enriched through a first coarse grinding process; Step 2: Mineral separation is achieved through fine particle size classification based on the differences in mineral brittleness / ductility: The main particle size of the minerals in the grinding product exhibits a pattern of galena < pyrite < chalcopyrite < native gold. During particle size classification, the particle size range is divided based on the types and quantities of minerals in the raw material. The first coarse grinding refers to: crushing the polymetallic sulfide ores to a particle size of approximately 3–20 mm, followed by coarse grinding to achieve a -200 mesh content of approximately 40%–50%, resulting in a relatively pure galena / native gold mixed concentrate. This invention can relatively simplify the traditional flotation process, reduce the consumption of reagents (such as inhibitors and collectors) during the separation process, and improve the green characteristics of the process.

The invention discloses a lead-zinc sulfide ore flotation separation inhibitor and application, and belongs to the technical field of mineral processing. The invention provides a method for applying sodium thiophosphate as a selective inhibitor for sphalerite and pyrite. The method comprises the steps that lead-zinc sulfide ore is ground, then in lead flotation operation, an effective amount of sodium thiophosphate is added into ore pulp so as to selectively inhibit flotation of sphalerite and pyrite, meanwhile, conventional dispersing agents, collecting agents and foaming agents are added in a matched mode, the lead sulfide ore is preferentially floated and recycled, and lead concentrate is obtained. By means of the selective adsorption effect of sodium thiophosphate on sphalerite and pyrite, the surface of the sodium thiophosphate is hydrophilic, adsorption of a collecting agent is hindered, and the influence of sodium thiophosphate on galena flotation is small. Compared with a traditional inhibitor, the sodium thiophosphate used in the method has the advantages of being small in dosage, high in selectivity, low in mutual content of lead and zinc in the concentrate, environmentally friendly and the like.

The application discloses a combined inhibitor for low-alkali flotation separation of silver-containing lead-zinc sulfide ore and application thereof and belongs to the technical field of non-ferrous metal dressing. Sodium carbonate and water glass are added in the grinding stage to control the dispersibility and alkalinity of the ore slurry; butylamine black dithiophosphate and aniline black dithiophosphate are used as combined collectors for galena in the lead flotation stage, and the combined inhibitor simultaneously inhibits the sphalerite and pyrite, thereby reducing the pollution of zinc-sulfur minerals to the lead concentrate; copper sulfate is used to activate the sphalerite in the zinc flotation stage, and ethyl xanthate is used as a collector to recover zinc minerals, and the pyrite still maintains a stable inhibited state at this time, thereby guaranteeing the grade of the zinc concentrate. The application uses aminopimelic amide as the sphalerite and pyrite inhibitor, and combines zinc sulfate and ferrous sulfate to build a composite inhibition system, so that the lead, zinc and sulfur minerals can be efficiently separated under a weak-alkaline ore slurry environment, the associated silver and precious metals can be maximally recovered, the waste of the precious metal resources is avoided, and the comprehensive recovery of the lead, zinc and silver polymetallic minerals is realized.

The invention discloses a galena and chalcopyrite flotation separation method, and belongs to the technical field of mineral processing and flotation separation. The method specifically comprises the following steps: firstly, adding a combined inhibitor into lead-copper sulfide ore to inhibit galena; and then filtering, adding an organic agent isethionic acid into the ore, filtering, then adding a collecting agent and a foaming agent, and finishing efficient separation of galena and chalcopyrite through one-time roughing, three-time refining and two-time sweeping. The method has the advantages of being efficient, environmentally friendly, wide in pH adaptation range, simple in technological process and the like, a traditional toxic inhibitor can be replaced, and efficient cleaning separation of lead and copper is achieved.

A method for selecting a collector for synchronous lead-silver enrichment based on coordination chemistry and electrochemistry includes: acquiring electrochemical information on a solid-solid interaction between a silver mineral and galena; acquiring the galena, the silver mineral, and potential targeted mineral-philic groups of the galena and the silver mineral, and outputting chk files; analyzing the quantum chemical calculation chk files to obtain shape and energy level information of frontier molecular orbitals of related minerals and the mineral-philic groups; preliminarily identifying a targeted mineral-philic group for the silver mineral; thermodynamically, determining whether the targeted mineral-philic group preliminarily identified for the silver mineral demonstrates a better adsorption capacity than other mineral-philic groups for the silver mineral; and calculating solvation free energies of targeted mineral-philic group derivatives with different carbon chain lengths and shapes, and determining a final mineral-philic reagent.

The invention belongs to the technical field of mineral separation, and particularly relates to a flotation separation method for galena and pyrite. The method specifically comprises the steps that galena and pyrite are crushed, mixed and subjected to size mixing, then the pH is adjusted to 6.5-7.5, and ore pulp is obtained; adding a complexing agent into the ore pulp, and mixing the pulp; then a combined collecting agent is added, and size mixing is conducted; finally, adding a foaming agent and mixing; flotation is conducted after pulp mixing is finished, and concentrate and tailings are obtained respectively; the complexing agent is selected from EDTA-2Na; the combined collecting agent is composed of 3418A and a thiourea compound with the structural formula shown in the specification, and R is selected from vinyl, allyl or ethyl. Through the synergistic effect of the complexing agent and the combined collecting agent, the flotation composite agent can be suitable for flotation separation of lead-iron sulfide minerals under the neutral pH condition, then efficient separation of galena and pyrite is achieved, and the galena and pyrite flotation composite agent under the neutral pH condition is environmentally friendly.