527 results about "Copper sulfide" patented technology

The invention provides a method for leaching copper-cobalt sulfide ore under efficient oxygen pressure, and relates to the technical field of metallurgy. The method for efficiently leaching the copper-cobalt sulfide ores under the oxygen pressure comprises the following steps: mixing materials including the copper-cobalt sulfide ores, sulfuric acid and water, slurrying, and then carrying out an oxygen pressure leaching reaction; and after the oxygen pressure leaching reaction is finished, solid-liquid separation is carried out, and leaching residues and leaching liquid are obtained. According to the method, the self-exothermic reaction of the excess sulfur element in the copper-cobalt sulfide ore is utilized, additional heating is not needed in the reaction process, then the oxygen pressure leaching reaction can be rapidly completed at a high temperature in a short time, and SO2 is not generated in the reaction process. The method for high-efficiency oxygen pressure leaching of the copper-cobalt sulfide ore has the advantages of being high in reaction speed, low in reaction energy consumption, easy to operate, environmentally friendly, easy to achieve industrial application and the like.

The invention discloses a method for synchronously improving the recovery rate of copper and cobalt in high-oxidation-rate copper-cobalt ore and low-grade copper oxide-cobalt concentrate, which comprises the following steps: (1) carrying out copper sulfide flotation on the high-oxidation-rate copper-cobalt ore to obtain high-copper tailings; (2) the low-grade copper-cobalt concentrate and the high-copper tailings are mixed according to the mass ratio of 1: (1-2), and mixed ore is obtained; (3) the obtained mixed ore and a sulfuric acid solution system leaching agent are stirred and mixed, and slurry is obtained; (4) leaching the obtained slurry at normal temperature, and carrying out solid-liquid separation to obtain leached residues and leached liquid; (5) carrying out washing, extraction, reverse extraction and electrodeposition on the obtained leaching residues to obtain metal copper; and removing iron from the raffinate, and adding magnesium oxide into the iron-removed liquid for precipitation to obtain crude cobalt hydroxide. According to the method, the high-copper tailings and the low-grade copper oxide cobalt concentrate are subjected to the processes of ore blending, size mixing, normal-temperature sulfuric acid leaching and the like, the final copper leaching rate is 95% or above, and the cobalt leaching rate is 70% or above.

The invention relates to the technical field of metallurgy, in particular to an efficient-utilization copper-cobalt ore dump leaching treatment method which comprises the steps that after copper-cobalt sulfide ore and copper-cobalt oxide ore are subjected to crushing treatment respectively, heap building is conducted; a solution of acidithiobacillus ferrooxidans is added into a sulfuric acid solution to serve as spraying liquid, heap leaching treatment is conducted on the heap-built copper-cobalt ore through a spraying device, and the spraying flow of the spraying device is controlled in the heap leaching treatment process according to changes of the environment temperature and humidity and changes of the pH value of heap leaching liquid; the obtained dump leaching liquid is subjected to extraction-electrodeposition treatment, and cathode metal copper, sediment and raffinate are obtained; and the raffinate serves as spraying liquid to be subjected to spraying circulation, precipitation is neutralized, and metal cobalt is recycled. The spraying flow of the spraying device is accurately controlled and adjusted, and the leaching effect of copper and cobalt metal in the copper-cobalt ore is improved.

The invention discloses a layered cobalt aluminum oxide / copper sulfide wave-absorbing material and a preparation method thereof, and belongs to the technical field of novel wave-absorbing materials, the wave-absorbing material is prepared through a two-step hydrothermal method, lamellar cobalt aluminum hydroxide is prepared through the hydrothermal method, then the lamellar cobalt aluminum oxide subjected to heat treatment is used as a substrate, and the lamellar cobalt aluminum oxide / copper sulfide wave-absorbing material is prepared through the two-step hydrothermal method. The preparation method comprises the following steps: growing nano flaky copper sulfide on the cobalt-aluminum oxide / copper sulfide composite material by adopting a hydrothermal method to form a layered cobalt-aluminum oxide / copper sulfide heterostructure, and adjusting the wave-absorbing property of the composite material by adjusting the content of the copper sulfide in the composite material. According to the layered cobalt aluminum oxide / copper sulfide wave-absorbing material and the preparation method thereof, the layered cobalt aluminum oxide / copper sulfide wave-absorbing material has the advantages that the density is relatively low, the effective absorption frequency band is relatively wide, the electromagnetic wave absorption performance is relatively high, the preparation method is simple, the morphology of the composite material can be regulated and controlled, and the like.

The invention discloses a method for asynchronously recovering copper and cobalt in sulfur-oxygen mixed copper-cobalt ore tailings through dressing and smelting combination. The sulfur-oxygen mixed copper-cobalt ore tailings are divided into a coarse fraction, a medium fraction and a fine fraction according to particle sizes; the coarse fraction is subjected to ore grinding and copper sulfide flotation, part of copper and cobalt are recycled, and coarse fraction tailings are obtained; the medium fraction is subjected to copper sulfide flotation, copper oxide flotation and magnetic separation, part of copper and cobalt are recycled, and medium fraction tailings are obtained; the fine fraction is subjected to magnetic separation, part of copper and cobalt are recycled, and fine fraction tailings are obtained; and neutralizing one or more than two of the coarse-fraction tailings, the medium-fraction tailings and the fine-fraction tailings to recover part of copper and cobalt. According to the characteristics of the sulfur-oxygen mixed copper-cobalt ore tailings, the sulfur-oxygen mixed copper-cobalt ore tailings are divided into different size fractions, and different grading processes are adopted for treatment. And efficient enrichment and recovery of copper minerals and cobalt minerals with different properties in the sulfur-oxygen mixed copper-cobalt ore tailings are realized through a multi-process combined grading process.

The invention discloses a multi-component nano inhibitor for flotation separation of high-argillaceous copper sulphide ore and application, the nano inhibitor is a nano calcium carbonate-calcium oxide-sodium humate coating body, the nano inhibitor is applied to flotation separation of the high-argillaceous copper sulphide ore, collaborative optimization of slime inhibition and copper ore selective collection is achieved, and the flotation separation efficiency of the high-argillaceous copper sulphide ore is improved. And high-quality copper sulfide concentrate and sulfur concentrate are obtained. According to the method, the high specific surface area and the surface activity of the nano particles are utilized, under the weak alkaline environment without desliming, through the simple, convenient, economical and efficient mineral processing technology and reagent combination, efficient recovery of copper, gold and sulfur in the high-argillaceous ore is achieved, the use amount of lime is greatly reduced, and the technical problem of tailing sedimentation is solved.

The invention provides application of sodium 2, 3-dimercaptopropanesulfonate as an inhibitor in low-alkalinity copper-sulfur flotation separation, and relates to the technical field of mineral separation. When the compound serves as an inhibitor, the compound, a collecting agent and a foaming agent are prepared into a composite flotation reagent and used for low-alkalinity flotation separation of chalcopyrite and pyrite, flotation separation is conducted through the steps of one-time roughing, at least one-time scavenging and at least one-time concentration after ore grinding and grading, and copper concentrate is collected; the method can effectively solve the problems that the copper-iron separation effect is poor in the process of flotation separation of the chalcopyrite and the pyrite, the copper recovery rate is low due to addition of a large amount of lime and the like, the chalcopyrite and the pyrite can be efficiently separated under the low-alkalinity condition through the specific flotation process, and the flotation effect on the chalcopyrite is improved.

The invention discloses a method for synthesizing a Mn0. 43Cd0. 57S / Cu2MoS4 photocatalyst by adopting a solvothermal method, and belongs to the technical field of catalysts. The preparation method comprises the following steps: preparing copper molybdenum sulfide by using cuprous oxide as a template, synthesizing copper molybdenum sulfide with high purity and good crystallinity by combining a solvothermal method, preparing manganese cadmium sulfide by using manganese acetate, cadmium acetate, sodium hydroxide and thioacetamide as raw materials, adding copper molybdenum sulfide before a hydrothermal reaction, successfully modifying the manganese cadmium sulfide by constructing a heterojunction, and preparing the copper molybdenum sulfide modified manganese cadmium sulfide. The Mn0. 43Cd0. 57S / Cu2MoS4 photocatalyst is synthesized, and the photocatalytic hydrogen production rate of the cadmium manganese sulfide is improved. Moreover, the hydrogen production rate of the Mn0. 43Cd0. 57S / Cu2MoS4 photocatalyst prepared by the invention can reach 8233 mu mol / (g.h), which is 2.08 times of the hydrogen production rate of pure cadmium manganese sulfide, and 1.24 times of the hydrogen production rate of cadmium manganese sulfide loaded with 1% platinum.

The invention provides a water treatment method and device using an alkali-reinforced copper-based material to excite peroxymonosulfate, and relates to the technical field of wastewater treatment.The method comprises the steps that an alkali agent, the copper-based material and peroxymonosulfate are added into water to be treated; the alkaline agent is sodium hydroxide and / or potassium hydroxide; the copper-based material is copper oxide and / or copper sulfide. The method provided by the invention has the advantages of excellent pollutant treatment effect, mild reaction conditions, simple process flow, environmental protection, energy saving, easy recovery and recycling and the like, and realizes the purposes of small dosage of the oxidant and the catalyst, high utilization rate of the oxidant, small dissolution amount of metal ions and up-to-standard pH of effluent.

The invention provides a cyanide-containing wastewater resource recovery and cyclic utilization method, and belongs to the technical field of environmental protection and water treatment. According to the method, firstly, copper is collected through sulfuration under the weak acid condition with the pH being 5-6, so that a copper-cyanogen complex ([Cu (CN) 43-]) in wastewater is converted into a mixed material of copper sulfide (CuS) and cuprous cyanide (CuCN), and primary recovery of copper is achieved; and then, adding a pH regulator 2 to control the pH of the reaction system to be 9-11, adding a separation agent to control the ORP of the reaction system to be-400mV to-200mV, and carrying out a separation reaction. In the process, cuprous cyanide reacts with free cyanide (CN <->) to generate a soluble copper-cyanogen complex, and copper sulfide is retained, so that cuprous cyanide is accurately separated from the copper-containing material, the content of cyanide in the material is reduced, and the obtained copper-containing material meets the requirements of industrial product quality standards and pollution control standards; the problems that in the prior art, the cyanide content in the copper-containing material obtained by recycling copper from the cyanide-containing wastewater exceeds the standard, and the environmental risk is high in storage, transportation and comprehensive utilization are solved.

The invention belongs to the technical field of electrochemical energy storage and electrocatalysis, and provides a modified electrode for in-situ growth of copper sulfide, a preparation method of the modified electrode and a flow battery. The preparation method comprises the following steps: (1) doping sulfur atoms and fluorine atoms on a substrate material by adopting a plasma cleaning method to obtain a doped substrate; (2) spraying a copper ion solution on the doped substrate, fully wetting, spraying a sulfur ion solution on the surface of the wetted doped substrate, and reacting; and (3) cleaning and drying the doped substrate to obtain the modified electrode for in-situ growth of copper sulfide. The low-cost and high-performance modified electrode for in-situ growth of copper sulfide has the advantages of high conductivity, specific surface area, electrochemical activity, catalytic performance and stability, improvement of polysulfide redox reversibility and the like, and can be applied to a sulfur-based flow battery system taking polysulfide as an active substance.

The utility model relates to the related technical field of filter pressing devices, in particular to a filter pressing device for cuprous cyanide waste liquid after copper sulfide precipitation, which comprises a rack and a frame fixed on the back surface of the rack, a plurality of uniformly distributed filter plates are arranged in the rack, a driving component is arranged in the frame, a mounting box is arranged at the top of the frame, and the mounting box is connected with the rack. And a fixing shaft is fixedly arranged in the mounting box, an inserting rod is arranged outside the fixing shaft in a sliding and sleeving mode, and a steering assembly and a pushing assembly are arranged in the mounting box. Through the arranged pushing assembly, when the steering assembly operates the insertion rod to be clamped with the filter plate, the pushing assembly reciprocates the insertion rod left and right, the insertion rod acts on the filter plate, and the filter plate vibrates, so that part of filter cakes which are difficult to automatically fall off in the filter plate can be shaken off, the filter plate and the filter plate do not need to be manually separated, and the labor intensity of workers is reduced. And the automatic treatment effect is achieved, and the working efficiency is improved.

The present invention relates to the field of asphalt modification technology, and more particularly to a modified asphalt composite material, a preparation method and its application in ultra-thin wearing layer, including the following parts by mass of raw materials: 4 6 parts of SBS, 3 5 parts of LDPE, 3 5 parts of epoxy castor oil, 2 4 parts of octamercapto POSS modified wood fiber, 1 3 parts of antifreeze agent, 0.1 0.2 parts of mixed catalyst, 6 10 parts of modified asphalt, 5 8 parts of waste tire rubber powder, 100 parts of basalt wear-resistant aggregate; the antifreeze agent is mixed by (0.7 0.9) with AB modified mesoporous copper sulfide, ILs GO, and bisaldehyde PEG in a mass ratio of (0.2 0.3) : (1); the modified asphalt is mixed and kneaded by 10 parts of petroleum asphalt and 0.6 1.2 parts of tetraallylsilane. The modified asphalt composite material prepared by the present invention has good anti-freeze cracking performance, and has certain intrinsic self-repairing performance.

The invention belongs to the technical field of manufacturing of negative-electrode-free sodium / magnesium metal battery current collectors, and discloses a copper-based composite current collector, a preparation method thereof and application of the copper-based composite current collector in a negative-electrode-free metal battery. The current collector is used for solving the problem that the cycle life of a battery is short due to disordered deposition of sodium / magnesium ions and overgrowth of sodium / magnesium dendrites of a traditional current collector under high current density and high surface capacity. According to the invention, the linear copper sulfide with the thickness of about 0.05-1 mu m is constructed on the surface of the copper foil in situ through a liquid-phase vulcanization method, the thickness of the copper sulfide modification layer is 0.5-5 mu m, and the nucleation overpotential of sodium ions or magnesium ions on a current collector can be effectively reduced. When the material is applied to a sodium / magnesium metal battery without a negative electrode, high average coulombic efficiency and excellent cycle life of the battery under ultra-high current density surface capacity can be realized.

The invention discloses a method for treating copper cobalt oxide ore, and belongs to the technical field of non-ferrous metal hydrometallurgy. The method comprises the following steps: carrying out critical leaching on the copper-cobalt oxide ore to obtain a leaching solution and leaching residues, returning the leaching residues to a wastewater and waste residue neutralization process, carrying out a sulfuration sectional copper-cobalt deposition process on the leaching solution to obtain two products of copper sulfide and cobalt sulfide, carrying out targeted adsorption cobalt recovery on the produced sulfurized solution, returning the desorbed solution to a critical leaching process, and carrying out secondary leaching on the desorbed solution. After adsorption, liquid enters a waste water and waste residue neutralization process, produced neutralization residues are piled up, and produced neutralization water is returned to a critical leaching process. The method sequentially comprises the key procedures of critical leaching, vulcanization segmented copper and cobalt deposition, targeted adsorption and waste water and waste residue neutralization. The process adopted by the invention has the advantages of short process flow, high recovery rate, zero discharge of wastewater and the like. Compared with a traditional process, the copper and cobalt leaching rates can reach 90% or above, and the cobalt recovery rate can be increased by 10% or above.

The invention relates to the technical field of mineral processing, and particularly provides a combined reagent system for flotation and magnesium reduction of talc-containing copper-molybdenum ore and application of the combined reagent system. The combined reagent system comprises a flotation collecting agent (faint yellow to orange transparent liquid, 40%-50% of active ingredients and less than or equal to 3% of free alkali) with active ingredients in the formula 1 and a flotation depressing agent (light yellow powder, extracellular polysaccharide extract of xanthomonas, the weight-average molecular weight of 1000-1500000 Daltons and rich in hydroxyl, carboxyl and pyruvic acid groups) with a structural formula in the formula 2, and the flotation depressing agent comprises extracellular polysaccharide extract of xanthomonas, the weight-average molecular weight of xanthomonas and the weight-average molecular weight of xanthomonas and is rich in hydroxyl, carboxyl and pyruvic acid groups. Through the synergistic adsorption effect of the combined reagent, the flotation grade and the recovery rate of the copper sulfide molybdenum ore are remarkably improved under the condition that the pH is 8-11. The combined reagent system has the advantages of being high in flotation efficiency, high in selectivity, low in reagent cost, environmentally friendly, high in industrial applicability and the like.

A beneficiation method for improving a grade of a magnesium-containing copper sulfide ore concentrate includes: crushing and grinding an ore to a fineness degree allowing 55% to 65% of particles to pass through a 0.074 mm sieve, adding an adjusting agent lime, collecting agents butylxanthate and kerosene, and a foaming agent methyl isobutyl carbinol (MIBC) to obtain a copper-molybdenum-sulfur mixed concentrate; re-grinding the copper-molybdenum-sulfur mixed concentrate to a fineness degree allowing 75% to 82% of particles to pass through a 0.048 mm sieve, adding lime, a magnesium-containing silicate inhibitor, a collecting agent 1, and MIBC to obtain a copper-molybdenum mixed concentrate; and adding sodium sulfide, kerosene, and MIBC to the copper-molybdenum mixed concentrate to obtain a high-grade copper concentrate. The beneficiation method adopts mixed flotation of copper-molybdenum, regrinding for separating copper and molybdenum from sulfur, and magnesium removal from a copper concentrate to allow quality improvement for the copper concentrate.

The invention discloses a grading magnetic-flotation combined beneficiation method for sulfur-oxygen mixed copper ore. The grading magnetic-flotation combined beneficiation method comprises the steps of ore grinding and screening, magnetic separation, grading, copper sulfide flotation, copper oxide roughing and copper oxide enhanced scavenging. According to the method, strong magnetic separation is adopted in the mill grading system to recover part of coarse-grain copper oxide, excessive grinding of copper oxide minerals in the ore grinding process is reduced, early recovery can be achieved, the comprehensive recovery rate of copper oxide is increased, meanwhile, release of copper ions in the ore grinding process is reduced, and the adverse effect on follow-up copper sulfide flotation is relieved. The efficient copper oxide vulcanizing agent is composed of sodium sulfide and sodium pyrosulfite, the stability of a film in the vulcanizing process is enhanced, meanwhile, the inhibition effect on pyrite is enhanced, and the flotation separation efficiency of copper oxide is improved. In addition, by adopting an efficient reagent and precise regulation and control, copper oxide concentrate is directly obtained through open circuit of copper oxide roughing and enhanced scavenging concentrate, and the copper metal falling loss caused by closed cycle is reduced.

The invention provides a method for preparing ferrous sulfate from iron-containing solid waste, and relates to the field of solid waste treatment. The method for preparing ferrous sulfate from the iron-containing solid waste comprises the following steps: mixing concentrated sulfuric acid and the iron-containing solid waste, and curing in a reducing atmosphere or a protective atmosphere to obtain a cured material; the cured material is subjected to water leaching and centrifugal separation, and silicon-containing slag and leachate are obtained; carrying out deepening treatment on the silicon-containing slag to obtain white carbon black; the leachate and iron powder are mixed for a reduction reaction, then a vulcanizing agent is added for vulcanization, precipitation and impurity removal, and copper sulfide slag and a ferrous sulfate solution are obtained through solid-liquid separation; treating the copper sulfide slag to recover valuable metals; and crystallizing the ferrous sulfate solution to obtain ferrous sulfate crystals. According to the method for preparing the ferrous sulfate from the iron-containing solid waste, low-cost, short-process and high-efficiency treatment of the iron-containing solid waste is achieved, and the ferrous sulfate product is obtained.

The invention discloses a method for extracting copper fine powder by flotation of copper-containing ore, which belongs to the technical field of mineral processing, and comprises the following steps: after copper-containing raw ore is crushed, ground and classified by a cyclone, overflow enters flotation, and settled sand is returned for regrinding; sodium carbonate is added into graded overflow to adjust the pH, a sodium hexametaphosphate-polyacrylamide composite dispersant is added, and copper sulfate is added and stirred after low-temperature microwave heating; gradient flotation is conducted, specifically, copper sulfide is roughly selected, the pH is adjusted, an amino-sulfonic acid group synergistic modified layered double metal hydroxide / cobalt ferrite composite collecting agent is added, and rough concentrate 1 is obtained through high-frequency pulse air inflation flotation; copper oxide roughing is conducted, clear water is supplemented to adjust the pH, and a collecting agent is supplemented to obtain rough concentrate 2; scavenging is performed for three times, a collecting agent is added for flotation, and concentrate returns to the previous stage; the rough concentrates are combined, and magnetic impurities are removed through high-gradient magnetic separation to obtain magnetic concentrates; and carrying out microbiological leaching on tailings to recover copper. The composite collecting agent is prepared through layered double hydroxide carrier synthesis, amino modification, sulfonic acid group grafting and cobalt ferrite anchoring.

A geothermally powered copper production system includes a geothermal system with a wellbore extending from a surface into an underground magma reservoir. A hopper receives a copper oxide ore that is crushed and provided to a leach heap to produce a copper-rich pregnant leach solution. The pregnant leach solution is provided to a settler that is heated by a heat transfer fluid heated by the geothermal system, and a product of the settler is used to prepare a copper product. A hopper receives a copper sulfide ore that is crushed and provided to a flotation tank. The flotation tank is heated by a heat transfer fluid heated by the geothermal system, and a product of the flotation tank is used to prepare a copper product.

Heap leaching process in chloride environments that uses chemical reactions and minimizes heat losses with the aim of achieving an operating temperature for the leaching of primary and secondary sulfides in ranges from 30°C to 40°C. The process includes semi-autogenous heating of leach heaps, from an initial saline-acid curing with hot brine and subsequent resting of the ore where the temperature increases as a result of the exothermic reactions, followed by thermal activation and subsequent intermittent irrigation, ending with chemical leaching. The combined effect of operating in temperature ranges higher than the ambient condition together with solutions concentrated in chloride ion allow significant improvement in the extraction kinetics of primary and secondary copper sulfides.

The invention provides a BiVO4 / CuS / NiFeCoOx photoelectrocatalysis material as well as a preparation method and application thereof, and relates to the technical field of photoelectrocatalysis. The preparation method of the photoelectrocatalytic material comprises the following steps: electrically depositing a BiOI film on the surface of a substrate, dropwise adding a vanadyl acetylacetonate solution on the surface of the substrate, and sequentially carrying out high-temperature calcination and alkali liquor soaking to obtain a BiVO4 substrate layer; coating the surface of the substrate layer with a chloroform solution of copper sulfide to obtain a BiVO4 / CuS composite material; and performing first-stage soaking in an iron-nickel-cobalt solution with the pH value of 4.5-5.5, adjusting the pH value of the solution to 6-8, and performing second-stage soaking, thereby finally obtaining the BiVO4 / CuS / NiFeCoOx photoelectric catalytic material. The material has good photoelectrocatalytic activity and stability.

The invention belongs to the technical field of metallurgy, and discloses a dump leaching treatment method for copper-cobalt ore. Comprising the following steps: (1) respectively crushing copper-cobalt sulfide ore and copper-cobalt oxide ore; (2) carrying out biological dump leaching on the crushed copper-cobalt sulfide ore and copper-cobalt oxide ore to obtain dump leaching liquid; (3) the dump leaching liquid is subjected to extraction-electrodeposition treatment, a cathode copper product is obtained, and raffinate serves as spraying liquid and returns to the step (2) to be recycled; wherein the acid consumption of the copper oxide-cobalt ore is A kg / t ore, the net acid yield of the copper sulfide-cobalt ore is B kg / t ore, and in the step (2), the ore loading and stacking mass ratio of the copper oxide-cobalt ore to the copper sulfide-cobalt ore is B / A: 1. In the heap leaching process, sulfuric acid or a neutralizing agent does not need to be additionally added, dynamic acid balance of the heap leaching system is achieved, the technological process is simple, production operation is convenient, industrial application is easy to achieve, and remarkable economic benefits are achieved.

The invention belongs to the technical field of metallurgy, and relates to a method for comprehensively recovering valuable elements from nonferrous smelting waste acid, which comprises the following steps: S1, mixing the waste acid with pyrrhotite, reacting in a sulfur dioxide atmosphere, and after the reaction, carrying out solid-liquid separation to obtain copper slag and copper removal liquid; and S2, H2S gas is introduced into the copper removal liquid obtained in the step S1, and after reaction, arsenic sulfide slag and arsenic removal liquid are obtained through solid-liquid separation. According to the method, FeS in the pyrrhotite selectively reacts with CuSO4 in the waste acid to generate indissolvable copper sulphide precipitates, meanwhile, under the protection of the sulfur dioxide atmosphere, the arsenic element in the waste acid is kept in a dissolved state and does not precipitate, the copper and arsenic elements in the waste acid can be effectively separated through the synergistic effect of the FeS and the CuSO4, and the separation steps are simple and efficient.

The invention relates to the technical field of metal beneficiation, in particular to a separation method for precious metal in low-grade copper-nickel sulfide ore, and solves the problems of low recovery rate and separation efficiency of the precious metal in the low-grade copper-nickel sulfide ore at present. According to the method, ore grinding is carried out through a first ball mill, grading is carried out through a first cyclone after ore grinding, part of graded settled sand is separated out through an ore separation gate and subjected to vibrating screen coarse separation, oversize coarse particle ore of a vibrating screen returns to the first ball mill to be ground again, it is ensured that precious metal in the oversize coarse particle ore is fully dissociated, and undersize fine particle ore is subjected to gravity separation through a Nelson gravity separator; the Nelson concentrate is subjected to ore grinding through a second ball mill, precious metal minerals such as gold and platinum in the Nelson concentrate are subjected to full monomer dissociation, desliming is conducted through a second cyclone after ore grinding, deironing is conducted through a magnetic separator on settled sand, and then the ores are fed into a table concentrator, so that the precious metal concentrate with higher purity is obtained, and precious metal in low-grade raw ore is effectively enriched; and the recovery rate of gold and platinum noble metals is effectively improved.

The invention belongs to the technical field of heat-engine plant unit circulation component surface corrosion prevention, and discloses a high-temperature-corrosion-resistant coating material, a coating and a preparation method and application thereof.The preparation method comprises the steps that by mass, 10%-20% of Cr, 1%-5% of Ni, 2%-10% of Fe, 10%-30% of molybdenum, 20%-40% of copper and 10%-20% of silicon are mixed to be uniform, a pipeline is embedded, heat treatment is conducted, and an initial chromium-rich infiltrated layer is formed; and then nitriding treatment is conducted on the initial chromium-rich nitriding layer, and the high-temperature-corrosion-resistant chromium-nitrogen composite coating is formed. The added silicon can form silicides in the coating, and the silicides can prevent the corrosion medium from permeating, so that the corrosion process is slowed down or prevented; the added molybdenum can effectively improve the stability of the composite coating in a corrosion medium rich in sulfate ions; and the added copper can form a protective layer consisting of copper sulfide or copper oxide on the surface of the steel, so that the corrosion of a corrosive medium is effectively prevented.

A preparation method of antibacterial hydrogel with enhanced antioxidant activity and NIR / pH double responsiveness comprises the following steps: firstly, preparing hollow copper sulfide nanoparticles, then dispersing the hollow copper sulfide nanoparticles into a chitosan solution to prepare the chitosan solution containing the hollow copper sulfide nanoparticles, and then adding the hollow copper sulfide nanoparticles into the chitosan solution to prepare the antibacterial hydrogel with enhanced antioxidant activity and NIR / pH double responsiveness. And sequentially adding a cross-linking agent epigallocatechin gallate (EGCG) solution and a 3-formyl phenylboronic acid solution (3-FPBA), and carrying out cross-linking, so as to obtain the antibacterial hydrogel with enhanced antioxidant activity and NIR / pH double responsiveness. The hydrogel is used for wound dressings in biomedical engineering materials. The preparation method is simple, the preparation process is green and safe, higher solid-like performance is shown, meanwhile, excellent injectability is kept, and great advantages can be achieved in the bacterial wound infection healing process.

The invention belongs to the technical field of biological medicine, and particularly relates to a copper sulfide-gold nano-cluster composite liposome and a preparation method and application thereof, and the copper sulfide-gold nano-cluster composite liposome is composed of copper sulfide nanoparticles, gold nano-clusters and liposome; the preparation method comprises the following steps: loading a gold nano-cluster on the surface of a copper sulfide nano-particle, and then coating the copper sulfide nano-particle with a 1, 2-distearoyl-sn-glycerol-3-phosphorylethanolamine-L-lysine-2, 3-dimethyl maleic anhydride liposome with pH response, so as to obtain the copper sulfide-gold nano-cluster composite liposome. According to the copper sulfide-gold nano-cluster composite liposome prepared based on the method, a biofilm matrix of MRSA can be disintegrated through a photothermal effect, permeation of nanoparticles and ROS is enhanced, and the problem that traditional antibiotics are ineffective to biofilms is solved.

The invention provides a method for co-processing multi-source copper-based waste through copper concentrate, and relates to the field of metal smelting. The copper concentrate and the copper-based waste are subjected to first mixing, and a mixture is obtained; under the oxygen-containing atmosphere, the mixture is smelted, and matte and smelting slag are obtained; the matte and the silicon-based slag former are subjected to first blowing to obtain first blowing slag; carrying out second mixing on the first converting slag and a reducing agent, and carrying out second converting to obtain crude copper; the copper concentrates comprise copper sulfide concentrates and copper oxide concentrates. Copper concentrate matte smelting and copper-based waste pyrogenic smelting are combined together, the problems that the copper-based waste smelting scale is small, and furnace burning is caused by overburning are solved, and the problem that a slag former is additionally added in copper concentrate matte smelting is solved. Through collaborative smelting, valuable metals such as copper, gold and silver enter matte, iron, aluminum and silicon in the copper-based waste enter smelting slag, and a silicon-based slag former and a reducing agent are added when the matte is blown, so that the slagging function is realized, and the valuable metals in the waste are recovered.