17 results about "Arsenopyrite" patented technology

The application provides a method for preparing a cobalt sulfide electron probe standard sample by nanogrinding and high-pressure synthesis technology, which takes arsenopyrite monomineral powder as a matrix, adds metal cobalt powder into the matrix, ensures that the cobalt content in an initial sample composed of the arsenopyrite monomineral powder and the metal cobalt powder is greater than or equal to 0.2 wt%, selects an ethanol dispersant, obtains sample powder with nanoscale size by mechanical ball milling with the size of grinding balls changed, applies axial load to the sample powder, cold-presses the sample powder into a consolidated sample, and obtains a cobalt-containing arsenopyrite electron probe standard sample after polishing. The application solves the problem of low or uneven cobalt content in natural cobalt-containing sulfides, and successfully prepares a cobalt-containing arsenopyrite electron probe standard sample meeting the uniformity requirement under submicron spatial resolution by using nanogrinding technology and high-pressure synthesis sample preparation method.

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

The invention relates to a method for enhancing the biological pre-oxidation gold extraction effect of high-arsenic low-sulfur gold concentrate in a high-altitude area. A method for enhancing the biological pre-oxidation gold extraction effect of high-arsenic low-sulfur gold concentrate in a high-altitude area comprises the following steps that (1) the high-arsenic low-sulfur gold concentrate is sequentially subjected to biological pre-oxidation and countercurrent washing treatment, and ore pulp is obtained; (2) adding an oxidizing agent into the ore pulp, and carrying out enhanced oxidation; and (3) lime is added into the ore pulp subjected to enhanced oxidation, after the ore pulp is adjusted to be alkaline, a golden cicada environment-friendly gold extraction agent and activated carbon are added, and the mixture is used for leaching gold. According to the method for strengthening the biological pre-oxidation gold extraction effect of the high-arsenic low-sulfur gold concentrate in the high-altitude area, the oxidizing agent matched with the technology is selected after the biological pre-oxidation technology, the oxidation effect of the gold-bearing minerals such as arsenopyrite and pyrite is further strengthened, wrapped gold in the gold-bearing minerals is fully opened, and the gold recovery rate is increased.

This invention discloses a combined sulfur and arsenic inhibitor and its application, belonging to the field of mineral processing and flotation. The inhibitor comprises 1-2 parts calcium cyanamide and 4-8 parts ammonium salt, wherein the ammonium salt is one or both of ammonium thiosulfate and ammonium sulfite. This combined inhibitor exhibits good inhibition effects on pyrite and arsenopyrite, can be used under weakly alkaline conditions, reducing the amount of lime required; it has high selectivity, with virtually no inhibitory effect on copper sulfide ores; and it is highly adaptable, effectively inhibiting pyrite and arsenopyrite in copper sulfide concentrates containing chalcopyrite and bornite. The combined inhibitor of this invention requires a low dosage, effectively improving the grade of copper sulfide concentrate and reducing the arsenic content.

The invention relates to a low-grade gold ore heap leaching method. The method comprises the following steps: crushing and grading ores into four particle sizes of coarse, medium, fine and fine silt; respectively adding a compound additive containing ferrous sulfate, potassium citrate, citric acid and sodium citrate into the fine particle grade and the fine silt grade, and granulating to realize iron pre-activation and potassium source presetting; adopting a three-layer reversed-order gradient heap building with a coarse fraction as a bottom layer, a medium fraction and a part of granulation particles as a middle layer and the rest granulation particles as an upper layer; a potassium ferricyanide circulating system with concentrated spraying on the upper layer, targeted liquid supplementing on the middle layer and aeration regeneration on the bottom layer is established, and pre-activated Fe < 2 + > on the upper layer is utilized to generate part of potassium ferricyanide in situ to selectively oxidize arsenopyrite. According to the method, iron sources of ores and ferrous sulfate are used for supplementing iron in a low-price mode, cyclic regeneration is combined with potassium ferricyanide, agent consumption and cost are greatly reduced, harm reduction of arsenic is achieved, and the method has the advantages of being high in gold leaching rate, short in leaching period, environmentally friendly, low in comprehensive cost and the like.

The application provides a method for accelerating green bio-oxidation of arsenic pyrite by using reinforced bentonite medium, and belongs to the technical field of sulfide ore metallurgy. First, acidophilic leaching bacteria with good arsenic tolerance are cultivated, and then a bentonite-microorganism-arsenic pyrite synergistic oxidation system is established to accelerate bio-oxidation and dissolution of arsenic pyrite. Because of the unique physical and chemical properties (such as layered structure, good ion exchange performance, etc.), the bentonite can not only provide an attachment site for the adsorption of bacteria on the surface of arsenic pyrite, but also has a certain catalytic effect on the Al 3+ and other active groups released by the dissolution of the bentonite, which effectively promotes the bio-oxidation and dissolution of arsenic pyrite. The process is simple, efficient and requires low equipment, and can effectively avoid the high cost and environmental pollution problems caused by traditional pyrometallurgical and hydrometallurgical processes.

This invention relates to the field of mineral processing technology, specifically to a method for separating arsenopyrite-bearing copper sulfide ore. After grinding the raw ore, the process involves slurry adjustment, regulation by a composite inhibitor, strong collection by a high-efficiency collector, and combined separation via de-refining and magnetic separation. Employing a process of "one roughing, two scavenging, and four cleaning," with middlings sequentially returned, high-quality copper concentrate and tailings are obtained, thus achieving efficient separation of arsenopyrite-bearing copper sulfide ore. In this invention, the composite inhibitor, through chelation modification, significantly enhances the hydrophilicity of the arsenopyrite surface; the high-efficiency collector significantly enhances the hydrophobicity of the copper sulfide ore. De-refining and magnetic separation achieves fine separation of copper sulfide minerals and arsenopyrite, yielding a high-quality copper concentrate with arsenic content <0.3% and copper grade >26%. This invention is simple to apply and easy for industrial production.

This invention discloses a method and its application for regulating the oxidation and arsenic speciation transformation of arsenopyrite. The method involves sequentially adding arsenopyrite and pyrrhotite to an acidic, iron-free medium with an initial pH of 2.0 to form a protective galvanic cell coupling, followed by inoculation with *Thiobacillus ferrooxidans* and a shaking reaction. By adjusting the ratio of arsenopyrite to pyrrhotite and the addition of *Thiobacillus ferrooxidans*, the method achieves precise regulation of the oxidation of arsenopyrite and the arsenic speciation transformation through phased changes in arsenic release behavior and the As(III) / As(V) ratio. This method possesses dual application value in resource utilization and environmental remediation, and can be applied to the optimization of pretreatment processes for the biological oxidation of gold-bearing arsenic ores or the control of arsenic pollution migration and transformation in acidic mine wastewater, tailings heap leaching, and arsenic-containing sulfide ore coexisting scenarios.

The invention discloses an arsenic-reducing and quality-improving method for micro-fine-particle high-arsenic copper concentrate, and belongs to the technical field of mineral processing. The method comprises the following steps: (1) adding water into the micro-fine-particle high-arsenic copper concentrate for pulp mixing to obtain ore pulp; (2) adjusting the pH value of the ore pulp obtained in the step (1); and (3) glutathione is adopted as an inhibitor of arsenic mineral arsenopyrite, flotation is conducted on the ore pulp, and arsenic reduction and quality improvement of the micro-fine-particle high-arsenic copper concentrate are completed. According to the method, the micro-fine-particle high-arsenic copper concentrate is subjected to reagent removal, then glutathione is adopted as an inhibitor for flotation arsenic reduction, the problem that in the micro-fine-particle high-arsenic copper concentrate, due to the good floatability of micro-fine-particle arsenopyrite, chalcopyrite and arsenopyrite are separated is effectively solved, the arsenic content in the copper concentrate can be remarkably reduced, meanwhile, the high recovery rate of copper is guaranteed, and the method is suitable for industrial production. And an efficient and reliable new way is provided for flotation and arsenic reduction of the high-arsenic copper concentrate.

This invention discloses a method for separating suppressed pyrite and arsenopyrite in copper-sulfur separation tailings, belonging to the field of non-ferrous metal recovery technology. The separation method includes: concentrating, settling, and stockpiling the copper-sulfur separation tailings slurry; conditioning the concentrated, settling, and stockpiled tailings; adding a collector and a frother to the conditioned tailings for a first roughing process to obtain a rough concentrate and rough tailings, without adding an activator to activate the suppressed pyrite before the first roughing process; scavenging the rough tailings; and finely cleaning the rough concentrate to obtain qualified sulfur concentrate and flotation tailings. This invention achieves effective separation of suppressed pyrite and suppressed arsenopyrite by concentrating and naturally stockpiling copper-sulfur separation tailings containing both suppressed pyrite and arsenopyrite, without the need for de-activation with an activator.

This application provides a method for the synergistic resource utilization of high-arsenic gold concentrate and low-grade silver-manganese ore, belonging to the field of hydrometallurgy. The method involves mixing high-arsenic gold concentrate and silver-manganese ore in a specific ratio, adding an oxidizing liquid to adjust the slurry concentration, and then mechanically intensifying the grinding process in an acid-resistant ball mill. During the grinding process, in the presence of the oxidizing liquid, pyrolusite in the silver-manganese ore and arsenopyrite in the high-arsenic gold concentrate undergo a redox reaction. Arsenic and iron enter the liquid phase in ionic form, while sulfur remains in the slag as elemental sulfur. After grinding, solid-liquid separation is performed to obtain arsenic-removed slag and arsenic-removed liquid. The arsenic-removed slag undergoes biological oxidation pretreatment, followed by solid-liquid separation to obtain oxidation slag and oxidation liquid. The oxidation slag is fed into a cyanidation system to recover gold and silver. The arsenic-removed liquid is treated to remove impurities, and manganese is recovered to obtain manganese salt products. The oxidation liquid and the tailings after manganese recovery are recycled. This application achieves the synergistic utilization of high-arsenic gold concentrate and low-grade pyrolusite ore through a mechanically intensified reaction.

The invention discloses a flotation reagent and method for sulfur and arsenic mineral activating agent and tin concentrate reverse flotation desulfurization and dearsenification, and belongs to the technical field of mineral processing. The sulfur-arsenic mineral activating agent comprises thiosulfate, soluble lead salt and soluble copper salt, can activate arsenic-sulfur minerals such as arsenopyrite (FeAsS2), pyrite (FeS2) and pyrrhotite (Fe1-xS) in a high-selectivity mode, enhances the flotation performance of the arsenic-sulfur minerals, and is used in cooperation with a cassiterite inhibitor, a sulphide ore collecting agent and a foaming agent, so that the flotation efficiency of the arsenic-sulfur minerals is improved, and the flotation efficiency of the arsenic-sulfur minerals is improved. The method is particularly suitable for flotation removal of arsenic-sulfur minerals in the tin concentrate, the tin loss can be remarkably reduced while the tin concentrate desulfurization and dearsenification efficiency can be greatly improved, and the environmental protection pressure of subsequent smelting is effectively relieved.

The invention provides a method for inhibiting arsenopyrite by coupling Eh potential pre-regulation and nano-silica sol, and belongs to the technical field of mineral processing. The method comprises the following steps: firstly, adding a potential regulating agent in the ore grinding process to pre-regulate the potential of ore pulp to 100-400mV so as to create an electrochemical condition for selective inhibition of arsenopyrite; then nano silica sol is added as an arsenopyrite inhibitor, and preferential and firm adsorption of the silica sol on the surface of the arsenopyrite is realized by utilizing the physicochemical property difference between the surface of the arsenopyrite and the surface of a target mineral after potential pre-regulation and control; and finally, a collecting agent and a foaming agent are added for flash flotation, useful mineral foam is rapidly floated out, concentration operation is conducted, rough concentrate with the arsenic content smaller than or equal to 0.5% is obtained, and the arsenopyrite subjected to deep inhibition is left in a flotation tank and enters tailings. Through the coupling effect of Eh potential pre-regulation and nano silica sol, high-selectivity and high-strength inhibition of arsenopyrite is achieved, the arsenic content of concentrate is remarkably reduced, and the method has the advantages of being free of pollution, low in cost, high in separation efficiency and the like and is suitable for green separation of complex arsenic-containing sulfide ore.

This invention belongs to the field of mineral processing technology and discloses a method for separating chalcopyrite and arsenopyrite by flotation using an oxidant and a complexing agent. The method involves adding an oxidant (chlorine dioxide, hydrogen peroxide, ozone, etc.) and a complexing agent (ammonium carbamate) to the flotation slurry system. The arsenopyrite is oxidized and then suppressed, with the recovery rate controlled to below 10%. Simultaneously, some chalcopyrite is also suppressed. Then, the complexing agent ammonium carbamate is added. The copper on the surface of the chalcopyrite reacts with the ionized anions and cations of ammonium carbamate, forming a stable adsorption through double complexation. This increases the number of active sites on the mineral surface, thereby activating the chalcopyrite and achieving more effective separation of chalcopyrite and arsenopyrite.

The invention provides an inhibitor for flotation separation of high-arsenic gold-bearing ore and a gold collecting method of the inhibitor, and belongs to the technical field of metal hydrometallurgy. According to the invention, by designing a flotation inhibitor, the arsenopyrite flotation inhibition method with a three-stage synergistic effect of potential regulation and control, in-situ synthesis and selective film covering is constructed. A mild and accurate oxidation-reduction potential window is constructed by utilizing the slow-release oxidation characteristic of calcium peroxide, potential regulation creates a key interface reaction environment for selective inhibition, glycine is used as an inhibitor precursor and is subjected to chelation reaction with copper ions dissociated from ore dissolution in ore pulp under an alkaline condition, and the copper ions are separated from the copper ions. And high-activity cupric glycinate hydroxide is generated in situ and can be preferentially diffused and enriched to the surface of the arsenopyrite subjected to potential pretreatment, so that accurate positioning and efficient utilization of an inhibitor on a target mineral interface are realized. According to the selective coating mechanism based on microchemical recognition, efficient separation of arsenopyrite and gold is achieved.

The application discloses a combined inhibitor for pyrite and arsenopyrite flotation separation and application thereof, and belongs to the technical field of mineral flotation. The combined inhibitor is composed of disodium maleate and trisodium carboxymethyl alanine in a mass ratio of 1:(0.3-1). The combined inhibitor can be applied to the flotation separation of pyrite and arsenopyrite. The sulfur-arsenic material containing pyrite and arsenopyrite is ground and slurried to a pulp pH value of 7-9, and then the combined inhibitor, butyl sodium xanthate collector and methyl isobutyl carbinol frother are added in sequence, and through one roughing, three times of cleaning and one scavenging, low-arsenic sulfur concentrate and arsenic-containing products are obtained. The medicament used in the application has simple structure and is biodegradable, and the flotation is carried out in near-neutral to weak alkaline pulp, without the high-alkali and strong-alkali environment and oxidizing agent of the traditional arsenic inhibition process, and the operation condition is mild.

This invention discloses a method for enhancing the bioleaching of arsenopyrite with bio-derived Schehertz minerals and simultaneously fixing arsenic, belonging to the fields of biometallurgy and mine environmental remediation technology. The method involves acclimating *Thiobacillus acidophilus* to arsenic tolerance in a culture medium containing arsenopyrite, then using the resulting arsenic-tolerant acclimation bacterial solution to biosynthesize Schehertz minerals. The synthesized Schehertz minerals are then uniformly mixed with the target arsenopyrite, and the arsenic-tolerant acclimation bacterial solution is added to initiate a bioleaching reaction, achieving in-situ solidification of arsenic. This method utilizes the strong adsorption capacity of the bio-derived Schehertz minerals for liquid-phase arsenic ions to rapidly reduce the concentration of free arsenic, thereby relieving the toxic inhibitory effect of arsenic on acidophilic microorganisms and shortening the microbial adaptation period. Simultaneously, the Schehertz minerals partially dissolve and release Fe in an acidic leaching environment. 3+ With As 5+ Co-precipitation forms ferric arsenate minerals, achieving in-situ stabilization and fixation of arsenic.