39 results about "Sulfide minerals" patented technology

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.

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.

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.

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 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 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 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.

The application belongs to the technical field of non-ferrous metal beneficiation, and particularly relates to a pyrite composite inhibitor and an application method thereof. The pyrite composite inhibitor comprises the following components in parts by weight: 20-40 parts of an amino acid salt component; 10-20 parts of a bisulfate; and 50-60 parts of a gallic acid component. The amino acid salt component comprises at least one of a salt compound of an amino acid or a salt compound of an amino acid polymer. The pyrite can be stably and effectively inhibited by using the amino acid salt component, the bisulfate and the gallic acid component in specific amounts. In addition to the inhibition of pyrite, the pyrite composite inhibitor does not have a negative inhibitory effect on other non-ferrous metal sulfide minerals. Compared with the prior art, the pyrite composite inhibitor has simple components, a significant inhibitory effect on pyrite and a high separation efficiency. The composite inhibitor can also be used as an inhibitor for arsenic pyrite.

The present application relates to the technical field of ore dressing, and in particular to a method for reducing the content of sericite in porphyry copper tailings. The method comprises the following steps: performing gravity separation grading operation on the porphyry copper tailings to obtain coarse-grained products and fine-grained products; feeding the fine-grained products into a magnetic separation operation to remove ferromagnetic minerals; performing multi-pass flotation operation on the high-intensity magnetic tailings to remove sulfide minerals; adjusting the pulp concentration and pH of the obtained desulfurization flotation tailings and feeding them into a reverse flotation operation, and the reverse flotation tailings are sericite products; the present application is aimed at the problem of high content of micro-fine-grained sericite in porphyry copper tailings dams, which increases the risk of dam collapse. The present application adopts a combined process of gravity separation-magnetic separation-desulfurization flotation-reverse flotation, the recovery rate of sericite in copper tailings is 26%-30%, the content of sericite in tailings is greatly reduced, and the safety of the dam body is improved.

The application discloses application of phosphatized modified lignin sulfonate and a method for separating sulfide minerals from magnesium silicate minerals, and belongs to the technical field of sulfide ore dressing. The phosphatized modified lignin sulfonate is used as an inhibitor of the magnesium silicate minerals, phosphoric acid groups are introduced into original phenolic hydroxyl sites, and the phosphoric acid groups and sulfonic acid groups of the lignin sulfonate are synergistically used, so that the selective adsorption capacity and potential regulation performance of the lignin sulfonate on the surface of serpentine are enhanced, and the inhibition performance and the flotation efficiency of the flotation reagent are significantly improved. Meanwhile, the application also provides a short process flow, and a method for efficiently separating sulfide minerals from magnesium silicate gangue minerals is realized, and the flotation recovery rate and grade of the sulfide minerals in a mixed ore flotation system are greatly improved.

The application provides a sulfide mineral leaching method, and belongs to the field of non-ferrous metallurgy, specifically, the sulfide mineral is ground into powder and prepared into a slurry solution, the slurry solution is added into a pre-prepared sulfuric acid reaction solution, a pre-leaching reaction is carried out, then an oxidation leaching reaction is carried out, and finally a solid-liquid separation treatment is carried out to obtain a sulfate solution; wherein the concentration of sulfuric acid in the sulfuric acid reaction solution is 30g / L-300g / L. The sulfide mineral leaching method provided by the application can greatly improve the metal leaching rate of the sulfide mineral under normal pressure conditions, greatly reduce the configuration number of high-pressure reaction devices, and greatly reduce the leaching and purification cost of the sulfide mineral.

The invention relates to the technical field of non-ferrous metal smelting, in particular to a tin smelting arsenic treatment system which comprises a first fixing frame, an ore grinding mechanism, an oxygen enrichment treatment mechanism and a arsenic removal mechanism, and the ore grinding mechanism is arranged on the upper portion of the first fixing frame and used for crushing sulfide minerals; the screening mechanism is arranged at the discharging end of the ore grinding mechanism and used for screening the sulfide minerals after ore grinding, and qualified powder is obtained; the oxygen-enriched treatment mechanism is arranged at the upper part of the first fixed frame and is used for carrying out sodium air preparation and oxygen-enriched air oxidation treatment on the washing liquid; the kun removal mechanism is arranged at the upper part of the first fixed frame and is used for mixing oxygen-enriched washing liquid with the ore grinding powder to remove kun; and the filtering mechanism is arranged at one end of the arsenic removal mechanism and is used for filtering the ore pulp to realize solid-liquid separation. The problems that in the traditional tin smelting flue gas washing liquid arsenic removal process, the arsenic removal efficiency is low, the treatment cost is high, secondary pollution is likely to be caused, and meanwhile the adaptability to an existing smelting process is poor are solved.

The invention discloses a numerical simulation method for a forming process of acidic pit water in a tailing pond stacking area, which is characterized in that a chemical reaction system for sulfide mineral oxidation and secondary mineral dissolution / precipitation is constructed based on a reactive solute migration mechanism in the forming process of the acidic pit water in a tailing pond; further, a reaction migration model suitable for the formation process of the acid mine wastewater is established, a reactive solute migration model of unsaturated-saturated two-phase flow is constructed by adopting a PFLOTRAN program, and water-gas two-phase flow and water chemical evolution characteristics in the formation process of the acid mine wastewater in a tailing pile are finely simulated; the influence of mineral dissolution / precipitation on pore water chemical conditions is analyzed. According to the invention, the formation and migration process of acidic water in the mine environment can be simulated and predicted, and support is provided for acidic mine wastewater pollution control and restoration strategy formulation.

The invention discloses a copper-nickel sulfide ore flotation magnesium-reducing inhibitor and a preparation method and application thereof, and relates to the technical field of mineral flotation inhibitors. Raw materials of the copper-nickel sulfide ore flotation magnesium-reducing inhibitor comprise a component A, water glass, an organic macromolecular thickening agent and water, the mass ratio of the component A to the water glass to the organic macromolecular thickening agent is (1-5): 2: (1-2); the ratio of the total mass of the component A and the organic macromolecular thickening agent to the mass of the water is 1: (0.5-2). The flotation magnesium-reducing inhibitor for the copper-nickel sulfide ore can be used for flotation separation of the copper-nickel sulfide ore, through core inhibition of the component A and compounding synergy of the water glass and the organic macromolecular thickening agent, magnesium-containing silicate such as talc and serpentine can be efficiently inhibited, the content of MgO in concentrate is remarkably reduced, meanwhile, inhibition on sulfide minerals (pentlandite, chalcopyrite and the like) is weak, and the flotation magnesium-reducing inhibitor for the copper-nickel sulfide ore can be used for flotation separation of the copper-nickel sulfide ore. The high recovery rate is guaranteed.

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 bare sulfide ore ecological restoration method, and relates to the technical field of sulfide ore ecological restoration. The method comprises the following steps: S1, identification and confirmation; s2, slope surface cleaning; s3, net hanging and anchoring; s4, guniting and sealing; s401, constructing a barrier belt; s5, constructing a drainage system; s6, drainage treatment; through four-component compounding of composite cement paste (425 # cement, temperature-sensitive expanded resin microspheres, nano calcium carbonate and acid-resistant chopped glass fibers), the synergistic effect of multiple functions is achieved, the nano calcium carbonate improves adhesive force and acid resistance, the temperature-sensitive microspheres solve cracking caused by expansion caused by heat and contraction caused by cold, and the acid-resistant chopped glass fibers have the three-dimensional supporting performance, so that the anti-cracking performance of the composite cement paste is improved, and the anti-cracking performance of the composite cement paste is improved. The problems of initial setting and flowing of a 30-70-degree steep slope guniting layer and insufficient skid resistance after solidification are solved, the service life of a cement covering layer is remarkably prolonged to 8-10 years, and the later repair frequency and cost are reduced.

The invention discloses a method for enriching gold from an ore material containing low-grade gold. According to the method, gold or sulfide minerals with high gold content are enriched from the ore material in a treatment mode comprising the processes of concentration, reagent removal, grading, regrinding, flotation and the like. According to the method, through the technological processes of concentration, reagent removal, classification, regrinding, flotation and the like, gold or high-gold-content sulfide minerals in sulfur concentrate or copper-sulfur separation tailings and other materials can be effectively enriched, the gold grade can be increased to 2 g / t or above, the sale pricing standard is met, or the pricing coefficient of gold in concentrate is increased. According to the method, the problem that the associated low-grade gold and silver precious metals in the sulfur concentrate or the copper-sulfur separation tailings are difficult to recover is effectively solved, the treatment capacity of subsequent smelting operation can be reduced, and dual improvement of environmental benefits and economic benefits is achieved; the method has the advantages of simple process flow, simple equipment operation, few types of agents, low dosage, low operation cost, reasonable technical economy and the like, and is easy to realize industrial application.