55 results about "Sulfide minerals" patented technology

The invention provides a composite reagent system and a chalcopyrite and sphalerite collecting method, and belongs to the technical field of mineral processing. The composite reagent system comprises a histidine derived functional group collecting agent and a black agent, and the histidine derived functional group collecting agent (containing a total sulfur ester group, a sulfydryl functional group and a side chain imidazole ring) serves as a core and is compounded with the black agent according to a specific proportion to form a target combination-synergistic interaction flotation mechanism. The histidine derivative collecting agent derives high-activity functional groups under the alkaline condition, and after sulfydryl is dissociated, stable chemical bonds are formed by the dissociated sulfydryl and metal ions on the surfaces of the chalcopyrite and the zinc sulfide. The black powder serves as an auxiliary collecting agent, and the collecting capacity of fine-grain or low-activity sulfide minerals is enhanced through chemical adsorption of dithiophosphate radicals and metal ions on the surfaces of the chalcopyrite and the sphalerite. After the two components are compounded, the selective enrichment efficiency of copper-zinc minerals in the flotation process is remarkably improved.

The invention provides a gold ore phase analysis method, and belongs to the field of mineral analys.The gold ore phase analysis method comprises the steps that a gold ore sample is prepared into ore pulp, the pH value is adjusted to 10-11, ultrasonic cavitation treatment is conducted after polyethylene glycol is added, and limonite turbid liquid and sedimentation bottom mud are obtained through separation; the turbid liquid is subjected to flocculation precipitation, drying, roasting, acid dissolution and impurity removal, and the limonite gold-loaded grade is obtained through the mass difference before and after dissolution and gold concentration determination; separating metal sulfide ore heavy minerals and gangue minerals from the settled bottom mud through artificial heavy elutriation, performing acid dissolution and impurity removal on the metal sulfide heavy minerals, and calculating the gold loading grade of the metal sulfide heavy minerals through mass difference and gold concentration determination; after gangue minerals are subjected to oxidizing roasting, the gold content is measured after concentrated acid dissolution; and calculating the distribution rate of gold based on the result. The gold loading grade and distribution of the limonite phase, the metal sulfide ore phase and the gangue mineral phase are measured in a split-phase mode, the method is highly matched with the gold ore development process, operation is easy and convenient, the result is reliable, and beneficiation and metallurgy technological process formulation and technical index pre-judgment can be effectively served.

The invention discloses a beneficiation method for tin-silver symbiotic polymetallic ore and application of the beneficiation method, and relates to the technical field of mineral separation. Comprising the steps that after tin-silver symbiotic polymetallic ore is ground, undersize minerals are obtained through a high-frequency screen, silver-copper flotation is conducted on the undersize minerals, and silver-copper concentrate and silver-copper tailings are obtained; the silver-copper tailings are subjected to lead-zinc-sulfur flotation, and lead concentrate and zinc-sulfur tailings are obtained; and the zinc-sulfur tailings are subjected to zinc-sulfur flotation, and zinc-sulfur concentrate and tin-sulfur tailings are obtained. The concentration of ore pulp in the ore grinding process is controlled, it is guaranteed that cassiterite and sulfide minerals are fully dissociated, then a first inhibitor is added in the lead-zinc-sulfur flotation process, the valuable metal recovery efficiency can be enhanced by optimizing the flotation process and collaboratively innovating a reagent formula according to the complex characteristics of tin-silver symbiotic polymetallic ore, and the recovery rate of the tin-silver symbiotic polymetallic ore is increased. The contents of silver, copper and tin in the tailings are obviously reduced, and efficient utilization of resources and reduction of solid wastes are realized.

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.

A polymetallic low-grade tin ore beneficiation process, comprising the following steps: 1) grinding; 2) classification; 3) magnetic separation: a first middling, a second rough concentrate, and a second middling are combined for wet magnetic separation to obtain magnetic tailings and a magnetic concentrate, a flotation agent is added to the magnetic tailings for conditioning, then flotation is performed to obtain a flotation concentrate and flotation tailings, and the flotation tailings are thickened, ground, and returned to a first-stage shaking table for re-beneficiation; 4) bulk flotation of sulfide minerals; and 5) re-beneficiation of a tin concentrate using a shaking table.

Provided herein are methods, systems, and compositions for degrading minerals. The methods, systems, and compositions provided herein involve the use of siderophores to degrade minerals such as sulfide materials. The methods, systems, and compositions provided herein may be used to release metal from sulfide mineral materials. The methods, systems, and compositions provided herein may further involve collecting, extracting, and / or purifying the metal released from the minerals.

The present invention relates to the field of mineral processing technology, and more specifically to a flotation method for arsenic-containing copper sulfide ore, comprising: first, coarsely grinding the raw ore, and adopting a process of "one roughing, two scavenging, and two concentrating" to suppress sulfur-copper-arsenic mixed selection at low alkalinity to obtain a copper-arsenic mixed concentrate and tailings; then, concentrating and re-grinding the copper-arsenic mixed concentrate to remove the drug, and adopting a "one roughing, two scavenging, and two concentrating" process to enhance copper-arsenic separation through slurry adjustment, coupled regulation of a combined inhibitor, and collection with a collector, thereby achieving efficient sorting of arsenic-containing copper sulfide ore. The present invention uses a combined inhibitor to effectively regulate the surface of the arsenic-containing mineral. The combined inhibitor achieves selective inhibition of arsenic-containing sulfide minerals such as arsenic-containing copper sulfide ore, tetrahedrite, and arsenopyrite through the technology of "oxidative modification-metal ion modification-organic compound coupling modification."

The present invention discloses a system for efficiently recovering scheelite and fluorite from polymetallic mud ore, comprising a crushing box, a first magnetic separation tank, a second magnetic separation tank, a first mixing tank, a first flotation machine, a second mixing tank, a second flotation machine, and a centrifugal unit, to obtain scheelite concentrate and fluorite concentrate. By adopting the method of first magnetic separation and then flotation, the corrosion of the acidity of the ore pulp on the magnetic separation equipment is reduced. At the same time, the ore pulp is acidic by pickling with oxalic acid. Oxalic acid, as an organic acid, has strong chelating ability and reducing properties, and can effectively react with oxides and pollutants on the surface of the mineral to remove them from the mineral surface. At the same time, oxalic acid can also react with sulfide minerals, changing the properties of their surface, making them easier to be captured and recovered during the flotation process. Under acidic conditions, oxalic acid can more effectively react with metal ions on the surface of fluorite to form stable complexes. The hydrophobicity of fluorite particles is enhanced, so that they are captured by the flotation agent and float to the surface of the ore pulp, thereby enhancing the flotation of fluorite and reducing interference with the flotation of scheelite.

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 a method for extracting gold through leaching after preoxidation of sulfide gold ore, and aims to solve the problems of low recovery rate, serious environmental pollution and the like of a traditional gold extraction method. The method comprises the following steps: firstly, mixing and finely grinding the gold sulfide ore and caustic soda flakes to 325 meshes, and adjusting the concentration of ore pulp to 33%; then, oxygen-enriched air is introduced into the reaction kettle and heated to 90 DEG C, pre-oxidation treatment is carried out for 18 hours, sulfide minerals are oxidized and decomposed, and gold particles are exposed; then, adding a golden cicada environment-friendly gold extraction agent and activated carbon for leaching, continuously reacting for 18 hours to form a thiosulfate complex of gold, and adsorbing the thiosulfate complex by the activated carbon; and finally, recovering gold by filtering and analyzing electrolytic activated carbon, and performing dry discharge on tailings to prepare bricks. By implementing the method, the leaching recovery rate of gold can be remarkably increased to 97%, meanwhile, cyanide is prevented from being used, environmental pollution is reduced, comprehensive utilization of resources is achieved, and the method has the multiple advantages of being efficient, environmentally friendly, economical and the like.

A flotation frother for separating sulfide minerals from clay minerals and a preparation method thereof. The flotation frother is composed of the following components in parts by weight: 3-8 parts of polyethylene glycol, 8-22 parts of mixed hexavalent alcohol, 10-18 parts of mixed ether alcohol, C5-C 14 Mixed fatty alcohol ether ester blended with 36-66 parts diesel; the mixed hexavalent alcohol is a mixture of cyclohexanol and methyl isobutyl carbinol; the mixed ether alcohol is a mixture of butyl ether alcohol, tripropylene glycol methyl ether and tripropylene glycol butyl ether; the C5-C 14 Mixed fatty alcohol ether ester blended diesel to produce industrial C5~C 14 A mixture of fatty alcohol ether ester and light diesel. The flotation frother provided by the present invention, by compounding the various components and utilizing the synergistic effect between the components, can effectively achieve the flotation separation of copper sulfide, nickel, and molybdenum minerals from common clay gangues such as talc, serpentine, chlorite, and mica, thereby improving the comprehensive recovery and utilization rate of copper sulfide, nickel, and molybdenum ore resources.

The present disclosure is directed to a process for recovering copper and cobalt from copper and cobalt-containing sulfide ores and concentrates, particularly relatively low grade cobalt bearing sulfide ores and concentrates. The process comprising floating a material comprising non-sulfide gangue minerals and copper-containing sulfidic minerals, cobalt-containing sulfidic minerals, and iron pyrite; contacting a lixiviant with a separated portion to form a pregnant leach solution comprising ferric iron and sulfuric acid and at least most of the copper and cobalt in the sulfidic minerals; treating the pregnant leach solution, by ion exchange and / or solvent extraction to form a rich solution comprising at least most of the copper and a raffinate, removing at least most of the copper and ferric iron to form a purified raffinate, and recovering at least most of the cobalt.

A method for extracting copper from sulphide mineral ore, comprising the following steps: stacking the ore to form a pile (heap), a leaching step, irrigating the pile with a first irrigating solution containing an acidic nitrate solution and nitrite, thereby causing the oxidation of sulfide minerals inside the pile, oxidation of gaseous nitrogen oxide released during the oxidation of sulfide minerals inside the pile with oxygen to form nitrogen dioxide, and hydrolysis of nitrogen dioxide to form nitric acid and / or nitrous acid in the first irrigating solution inside the pile, to continue the leaching stage and reduce nitrogen oxide losses from the pile.

This invention discloses a flotation process for recovering apatite from iron ore tailings, belonging to the field of mineral processing technology. It includes the following steps: 1. High-gradient magnetic separation is applied to the iron ore tailings to recover and remove magnetic iron-bearing minerals. The removed iron-bearing minerals are returned to the main iron ore processing flow. The tailings enter a sluice to remove large gangue minerals, and then enter a thickener for concentration. 2. The underflow product from the thickener is subjected to sulfide mineral flotation and gypsum flotation to remove easily interfering impurities, followed by apatite collecting direct flotation to obtain apatite concentrate. 3. The apatite concentrate is subjected to ultrafine grinding for liberation and selective mudification of impurities, followed by closed-circuit apatite cleaning to obtain a qualified apatite concentrate product. This invention can achieve good recovery and utilization of apatite from iron ore tailings and has great economic feasibility.

The present invention relates to a Solid-Liquid-Solid (SLS) hydrometallurgical method in the presence of hydrated and / or non-hydrated salts under supersaturation conditions. This method enhances the chemical and physical reactions on the ore or concentrates, thereby causing crystallization, recrystallization, and release of copper through non-stoichiometric decomposition of the sulfide, followed by precipitation with chloride. The invention comprises three stages: a) Wetting, b) Drying and Supersaturation, and c) Washing and Re-wetting. These stages occur at temperatures of 20 to 40°C, regardless of the redox potential, with minimal water and acid consumption and without the need for oxygen addition. The method reduces acid and water consumption because the sulfide transformation can be achieved using only hydrated salts and / or minimal acid and water.Furthermore, the present invention allows for a reduction in water usage during the agglomeration and / or agglomeration-curing stage. This is because, when the hydrated salt is mixed with the mineral, the water molecules in the hydrated salt moisten the mineral, reducing the volume of water that must be added during the wetting and agglomeration and / or curing stages. The method of the present invention can also be applied to sulfide base metals such as nickel, zinc, cobalt, lead, and molybdenum, among others, regardless of common impurities in sulfide minerals, such as the presence of arsenic.

The application discloses a method for high-temperature and high-pressure collaborative treatment of red mud, coal or coal gangue, and belongs to the field of resource utilization of red mud, coal or coal gangue. The method comprises the following steps: mixing red mud, coal or coal gangue and water, and then placing the mixture into a high-temperature and high-pressure device; introducing an oxygen-containing gas or adding an oxidant; under the high-temperature and high-pressure conditions, mineral decomposition and reconstruction of the red mud and the coal or coal gangue occur, acidic substances produced by oxidation of sulfide minerals and carbon-based minerals in the coal or coal gangue and alkaline substances in the red mud are subjected to neutralization reaction; and after desalination of reaction products of the red mud and the coal or coal gangue, the reaction products are used as ecological matrix soil. The method disclosed by the application accelerates decomposition of alkaline minerals such as nepheline in the red mud and release of alkali under high-temperature and high-pressure conditions, and accelerates oxidation of carbon-based minerals and sulfide minerals in the coal or coal gangue and transformation of humus and humic acid, neutralizes alkaline substances and acidic substances produced in the reaction, realizes rapid dealkalization of the red mud, controls the degree of oxidation of the carbon-based minerals, and improves the content of organic matter in the reaction products, so that full resource utilization and ecological utilization of the red mud, the coal or the coal gangue are realized.

The present invention relates to compositions that are stable over time in an aqueous medium and comprise thionocarbamate-derived compounds, and to the preparation method thereof. The invention also relates to aqueous collector compositions that are stable for extended periods of time and suitable for use in processes involving the froth flotation of sulfide minerals for the extraction of valuable metals, the compositions comprising compounds derived from thionocarbamate that are stable in an aqueous medium, compounds derived from mono- and dithiophosphates, stable ionic xanthate solutions and lignin.

The present application relates to the technical field of mineral processing recovery, more particularly to a mineral processing method for efficiently recovering silver, copper, zinc and sulfur from a complex silver-copper-zinc-sulfur mixed concentrate. The mineral processing method provided by the present application comprises the following steps: feeding and screening, coarse-grained partial grinding, silver-copper-zinc-sulfur separation after grinding, zinc-sulfur concentrate merging into fine-grained partial grinding, zinc-sulfur separation after grinding, etc. The mineral processing method provided by the present application combines the special properties of the silver-copper-zinc-sulfur mixed concentrate, utilizes the floatability difference of sulfide minerals, adopts a process flow of hierarchical and step-by-step flotation enrichment, realizes efficient enrichment and separation of valuable minerals in the complex silver-copper-zinc-sulfur mixed concentrate, and effectively recovers silver, copper, zinc and sulfur in the complex silver-copper-zinc-sulfur mixed concentrate, with good separation effect and advanced indexes.

The embodiment of the invention provides a heavy metal pollution ecological restoration device and technology. The heavy metal pollution ecological restoration device comprises a flood buffer layer, a harmless layer, an ecological restoration layer and a base layer which are sequentially arranged in a stacked mode from top to bottom. According to the heavy metal pollution ecological restoration device provided by the invention, the flood buffer layer, the harmless layer, the ecological restoration layer and the base layer are sequentially stacked from top to bottom, so that a gradient synergistic restoration system is formed; the problems of acidification, continuous migration of heavy metals and poor remediation sustainability caused by long-term neglect of sulfide mineral epigenetic action in traditional ecological remediation of the sulfide mining area are effectively solved, the flood buffer layer is made of natural fiber materials and porous mineral media, rainfall flood can be remarkably absorbed, the water speed can be slowed down, suspended particles can be preliminarily filtered out, and the ecological remediation effect of the sulfide mining area is improved. Large-scale diffusion of pollutants and soil erosion caused by flood scouring are prevented, and the risk of secondary pollution is reduced.

The application belongs to the technical field of development of beneficiation reagent, and particularly relates to application of a copper ore depressant in flotation of copper-containing minerals, wherein the copper ore depressant includes but is not limited to homologues of 2,5-dithiodiurea, compounds with different carbon chain lengths or isomers at carbon chains. Compared with traditional copper ore depressants, the copper ore depressant has more prominent inhibition effect, and has the characteristics of less dosage, high efficiency and environmental protection. The application provides a new idea for developing efficient complex multi-metal copper-containing sulfide mineral resources and separating complex multi-metal mixed minerals, and provides a brand-new design direction for use of combined depressants.

The application discloses a kind of sulfide mineral samples rich in scattered metal elements and its preparation and application method.The preparation method comprises: obtaining the salt solution of scattered metal elements with total salinity of 5-20wt%, pH is 2-3, it is hydrothermally reacted with sulfur element and calcite particles at the reaction temperature of 150-250 DEG C.The preparation method process is simple, controllability is strong, the product obtained can simulate the sulfide rich in scattered metal elements under natural mineralization conditions, and provides ideal experimental sample for studying the occurrence form and replacement mechanism of scattered elements in mineral.

The application provides a low-grade scheelite and fluorite ore beneficiation separation method. The preparation method adopts a scheelite-fluorite mixed flotation-scheelite-fluorite mixed concentrate reseparation process, through adopting a xanthate collector to preferentially remove pyrite, magnetic pyrite and other sulfide minerals, the interference of the sulfide minerals on subsequent scheelite-fluorite flotation is reduced; then through controlling the pH value of the scheelite-fluorite separation flotation slurry, and under the action of a special inhibitor, the scheelite-fluorite mixed concentrate is subjected to a reseparation process; in this way, the inhibition of fluorite in the traditional preferential flotation of scheelite and then fluorite process can be effectively reduced, and finally the efficient flotation of scheelite and fluorite ore is realized. Through controlling the pH value at 3-5 and adding an inhibitor SW, the argillaceous gangue such as calcite can be effectively inhibited, the floatability of scheelite is good, and the fluorite is basically not floated, so that higher-grade scheelite and fluorite concentrates can be obtained.

The invention relates to a flotation separation method for high-arsenic antimony sulfide, and belongs to the technical field of mineral processing. Ore grinding operation is conducted, ore is crushed to 10-20 cm, sodium sulfide is added into the ore, ball-milling ore grinding is conducted, the ore grinding concentration is controlled to range from 60% to 80%, the graded overflow fineness is controlled to range from 70% to 80%, and the overflow ore pulp concentration ranges from 25% to 30%; ammonium oxalate is added at an overflow ore pulp outlet; sodium tannate is continuously added into the ore pulp, butyl xanthate and MIBC are added for pulp mixing, and arsenic concentrate and antimony-containing tailings are obtained through arsenic flotation; and lead nitrate or ammonium nitrate is added into the antimony-containing tailings, butyl xanthate and MIBC are added for size mixing, flotation of antimony minerals is carried out, and a high-quality low-arsenic antimony sulfide concentrate product is obtained. The method is technically characterized in that under the action of a combined inhibitor sodium sulfide, ammonium oxalate and sodium tannate, antimony sulfide minerals are effectively inhibited, the arsenopyrite is activated at the same time, reverse flotation is conducted on the arsenopyrite through a collecting agent, and effective separation of the arsenopyrite and antimony sulfide is successfully achieved.

The invention belongs to the field of mineral flotation, and particularly relates to a collecting agent and method for flotation of non-sulfide ore, and the collecting agent has a structure shown in the formula 1 (); in the formula 1, R1 is alkyl of C3-C17, modified alkyl of C4-C17, aryl or substituted aryl; r2 is methylene, 1, 2-ethylidene or a benzene ring; r < 3 > is H or CH3; m is H < + >, Li < + >, Na < + >, K < + > or NH4 < + >. Researches show that in the formula 1, through combination of-CO-N-and-CONO-and control of short-chain or conjugated R2, synergy among groups in molecules can be achieved, a high-selectivity structure for targeted capture of the non-sulfide ore is constructed, and therefore the collecting capacity and selectivity of the non-sulfide ore can be enhanced.

This invention discloses a magnesium-reducing inhibitor for the flotation of copper-nickel sulfide ore, its preparation method, and its application, relating to the field of mineral flotation inhibitor technology. The raw materials for the magnesium-reducing inhibitor for the flotation of copper-nickel sulfide ore include component A, water glass, an organic macromolecular thickener, and water; the mass ratio of component A, water glass, and the organic macromolecular thickener is 1~5:2:1~2; the mass ratio of the total mass of component A and the organic macromolecular thickener to the mass of water is 1:0.5~2. The magnesium-reducing inhibitor for the flotation of copper-nickel sulfide ore of this invention can be used for the flotation separation of copper-nickel sulfide ore. Through the core inhibition of component A and the synergistic effect of the combination of water glass and the organic macromolecular thickener, it can efficiently inhibit magnesium-containing silicates such as talc and serpentine, significantly reducing the MgO content of the concentrate. Simultaneously, it has weak inhibition on sulfide minerals (nickel pyrite, chalcopyrite, etc.), ensuring a high recovery rate.

A terpolymer composition, and method of preparing the same, said terpolymer composition comprising 5 to 90 mol% of recurring units having an uncharged functional group, 5 to 40 mol% of recurring units having a sulfur-containing functional group, and 5 to 90 mol% of recurring units having a charged functional group, based on total mols of the terpolymer composition, wherein the terpolymer composition comprises a weight averaged molecular weight (Mw) in a range of 1000 Da to 15000 Da. The present invention also relates to a method of selectively recovering sulfide minerals comprising conditioning a process ore slurry with the terpolymer composition, and conducting a froth flotation process to separate the process ore slurry into a non-value mineral stream and a value mineral stream.

Provided is a mineral processing method that allows obtaining a concentrate having a low arsenic grade from a raw material having a high arsenic grade. The mineral processing method includes: a repulping step of adding water to a raw material containing a non-arsenic-containing sulfide mineral as a sulfide mineral not containing arsenic and an arsenic-containing sulfide mineral as a copper sulfide mineral containing arsenic to obtain a mineral slurry; a pH adjusting step of adjusting a pH of a liquid phase of the mineral slurry to 10 or more; a conditioning step of adding an oxidant and xanthate alkali metal salt to the mineral slurry; and a flotation step of performing flotation using the mineral slurry to separate the raw material into a floating ore having a grade of the non-arsenic-containing sulfide mineral higher than a grade of the non-arsenic-containing sulfide mineral of the raw material and a precipitating ore having a grade of the arsenic-containing sulfide mineral higher than a grade of the arsenic-containing sulfide mineral of the raw material. The raw material contains the arsenic by 4.4 to 5.8 pts.wt. per 100 pts.wt. of copper. 20 25 20 49 29 30 J un 2 02 5 A B S T R A C T 2 0 2 5 2 0 4 9 2 9 3 0 J u n 2 0 2 5 P r o v i d e d i s a m i n e r a l p r o c e s s i n g m e t h o d t h a t a l l o w s o b t a i n i n g a c o n c e n t r a t e h a v i n g a l o w a r s e n i c g r a d e f r o m a r a w m a t e r i a l h a v i n g a h i g h a r s e n i c g r a d e . T h e m i n e r a l p r o c e s s i n g m e t h o d i n c l u d e s : a r e p u l p i n g s t e p o f a d d i n g w a t e r t o a r a w m a t e r i a l c o n t a i n i n g a n o n - a r s e n i c - c o n t a i n i n g s u l f i d e m i n e r a l a s a s u l f i d e m i n e r a l n o t c o n t a i n i n g a r s e n i c a n d a n a r s e n i c - c o n t a i n i n g s u l f i d e m i n e r a l a s a c o p p e r s u l f i d e m i n e r a l c o n t a i n i n g a r s e n i c t o o b t a i n a m i n e r a l s l u r r y ; a p H a d j u s t i n g s t e p o f a d j u s t i n g a p H o f a l i q u i d p h a s e o f t h e m i n e r a l s l u r r y t o 1 0 o r m o r e ; a c o n d i t i o n i n g s t e p o f a d d i n g a n o x i d a n t a n d x a n t h a t e a l k a l i m e t a l s a l t t o t h e m i n e r a l s l u r r y ; a n d a f l o t a t i o n s t e p o f p e r f o r m i n g f l o t a t i o n u s i n g t h e m i n e r a l s l u r r y t o s e p a r a t e t h e r a w m a t e r i a l i n t o a f l o a t i n g o r e h a v i n g a g r a d e o f t h e n o n - a r s e n i c - c o n t a i n i n g s u l f i d e m i n e r a l h i g h e r t h a n a g r a d e o f t h e n o n - a r s e n i c - c o n t a i n i n g s u l f i d e m i n e r a l o f t h e r a w m a t e r i a l a n d a p r e c i p i t a t i n g o r e h a v i n g a g r a d e o f t h e a r s e n i c - c o n t a i n i n g s u l f i d e m i n e r a l h i g h e r t h a n a g r a d e o f t h e a r s e n i c - c o n t a i n i n g s u l f i d e m i n e r a l o f t h e r a w m a t e r i a l . T h e r a w m a t e r i a l c o n t a i n s t h e a r s e n i c b y 4 . 4 t o 5 . 8 p t s . w t . p e r 1 0 0 p t s . w t . o f c o p p e r . A B S T R A C T 2 0 2 5 2 0 4 9 2 9 3 0 J u n 2 0 2 5

The application provides a method for leaching nickel and copper in a high-magnesium low-grade copper-nickel sulfide ore by low-acid-consuming microorganisms, which comprises the following steps: first, setting a magnesium ion concentration gradient microbial domestication system under the condition of chalcopyrite as an energy substrate in a basic salt medium, obtaining a microorganism with high-efficiency iron-sulfur-oxidation function in a high-concentration Mg 2+ stress conditions; then, setting a pH gradient adaptation domestication system to further improve the alkali resistance of the acidophilic leaching bacteria. The domesticated leaching bacteria can oxidize chalcopyrite, nickel pyrite, pyrite and other sulfide minerals in the high-magnesium copper-nickel sulfide ore under a higher pH condition to produce Fe 3+ and H2SO4, which can promote the dissolution of gangue minerals such as chlorite, serpentine and phlogopite and the high-efficiency release of valuable metals such as nickel and copper while reducing the pH of the leaching system. The method has the advantages of simple process, high efficiency, low equipment requirement and no need for additional acid, and can effectively avoid the high cost and environmental pollution problems caused by traditional chemical and physical methods.

The invention discloses a method for extracting lead from waste lead plaster by taking sulfide minerals as a reducing agent, and belongs to the field of hydrometallurgy. The method comprises the following steps: mixing, heating and stirring the waste lead plaster, sulfide minerals, ferric salt and a sulfuric acid solution, reducing and converting a lead-containing phase in the waste lead plaster into insoluble lead sulfate to obtain reducing slag, generating ferrous ions from the sulfide minerals under the action of a ferric salt catalyst, and reducing and converting lead dioxide in the waste lead plaster into lead sulfate; the reducing slag and an acetate solution are mixed, heated and stirred, lead sulfate is desulfurized and leached into soluble lead acetate, and a lead-containing leaching solution is obtained. Aiming at the waste lead plaster in the waste lead-acid storage battery, the low-cost sulfide mineral is used as a reducing agent, so that the process cost is reduced. By means of the two-step process of reduction conversion and desulfurization leaching, the additional impurity separation procedure is avoided, the extraction efficiency of lead in the waste lead plaster is 99% or above, the pure lead-containing leaching solution is obtained, and a new thought is provided for efficient recycling of the waste lead plaster.