20 results about "Chalcopyrite" patented technology

A system for dynamic oxidation of a heap of copper ore includes a “process island” for formulating and dispensing oxidizing reactive mixtures having predetermined compositions, and irrigating the heap with the mixtures to progressively transform the ore and maintain conditions for enhanced recovery of metal by heap leaching, solvent-extraction and electrowinning. In embodiments, the system is adapted to obtain copper metal from the refractory copper mineral chalcopyrite.

This invention relates to the field of mineral processing technology, specifically to an environmentally friendly copper-molybdenum separation inhibitor, its preparation method, and its application. The method includes: mixing starch and formamide, stirring at room temperature, cooling in an ice-water bath at -5°C, slowly adding chlorosulfonic acid at this temperature to initiate a sulfonation reaction, neutralizing to pH 7-8 with sodium hydroxide solution after the reaction, adding anhydrous methanol to precipitate the product, and washing and drying to obtain the sulfonated anionic starch polymer DGSS. The inhibitor is applied to the flotation separation of copper-molybdenum mixed concentrates, combined with a closed-circuit process of one roughing, one scavenging, and four cleaning stages, employing a gradient reagent reduction and staged kerosene replenishment system from roughing to cleaning. This allows for selective inhibition of copper sulfide minerals such as chalcopyrite at extremely low dosages, with minimal impact on the floatability of molybdenite. It completely avoids the use of toxic substances such as cyanide, Knox reagent, or sodium sulfide, exhibiting good selectivity, low reagent consumption, environmental friendliness, and a simple preparation process that is easy to industrialize.

The present invention relates to a quantum dot synthesis method for synthesizing chalcopyrite-based quantum dots, the quantum dot synthesis method comprising: a nanoparticle production step for reacting a group I element and a group VI element to produce nanoparticles; and a cation diffusion step for diffusing group III element cations into the nanoparticles by heat treatment. Accordingly, there is provided a method for synthesizing quantum dots having good light-emitting characteristics having uniform particle diameters but not having compositional inhomogeneity.

The application discloses a method for lime-free and acid-free copper-sulfur flotation separation, wherein a combined inhibitor for copper-sulfur separation comprises ferrous sulfate and amygdalin, and is used as a pyrite inhibitor in flotation separation of chalcopyrite and pyrite.The combined inhibitor ferrous sulfate and amygdalin, a collector and a foaming agent are added to a raw ore after crushing and grinding to perform a copper flotation operation, and after the copper flotation operation, a combined activator sodium percarbonate and copper sulfate, a combined collector and a foaming agent are added to the ore pulp to perform a sulfur flotation operation.The combined inhibitor ferrous sulfate and amygdalin has a strong inhibiting effect on pyrite, and can effectively realize flotation of chalcopyrite; the combined activator sodium percarbonate and copper sulfate has a good de-inhibiting and activating effect on pyrite, and can effectively realize flotation of pyrite, thereby reducing the mineral processing cost while enhancing the copper-sulfur separation effect, and having a good application prospect.

A novel bis-ligand chalcopyrite collector and a preparation method and application thereof. The collector is prepared by first synthesizing an intermediate oxalyl diisothiocyanate from oxalyl chloride and thiocyanate, and then reacting the intermediate with an amine or an alcohol using a one-pot method. The collector provided by the present disclosure can form more stable dual-site adsorption on the chalcopyrite surface, thereby generating a more stable double-chelate-ring structure than the single-site adsorption of a traditional chalcopyrite collector such as xanthate and dithiophosphate. The collector not only has higher collection ability and excellent selectivity, but also can achieve efficient copper-sulfur separation even under a low-alkalinity condition. The preparation process of the collector is simple and operable, facilitating the flotation of chalcopyrite and its separation from pyrite.

This invention discloses a flotation separation method for high-sulfur copper-zinc ore beneficiation, comprising the following steps: Step a. Classifying and grinding the high-sulfur copper-zinc ore, controlling the grinding fineness to ensure that the product particle size P80 is 120μm to 150μm; Step b. Performing a first-stage copper-zinc mixed flotation operation on the obtained grinding product: adding lime during the flotation process at a rate of 100g / t to 200g / t to adjust the pH value of the pulp to the range of 7.5 to 8.5, forming surface statics between chalcopyrite, sphalerite, and pyrite. Potential difference; an aerated flotation machine is used as the flotation equipment, and the selective collector O-ethyl-N-benzoyl thiocarbamate is added at a dosage of 25g / t to 30g / t for aerated flotation to obtain a copper-zinc-sulfur mixed concentrate; step c. the obtained copper-zinc-sulfur mixed concentrate is fed into a vertical spiral stirred mill for regrinding, and the regrinding fineness is controlled to P90≤20μm to achieve full mineral liberation and surface desorption; this invention can achieve precise separation of copper, zinc and sulfur, reduce costs and improve efficiency and increase the comprehensive utilization rate of resources.

This invention relates to a flotation depressant and flotation method for recovering copper from magnetically separated iron tailings, specifically in the field of mineral flotation technology. The flotation depressant comprises: sulfonated modified tannin, sodium cyanurate, carboxymethyl chitosan, and carbonates. The flotation depressant provided by this invention, through the synergistic effect of its components, achieves highly efficient selective inhibition of pyrite at a pulp pH of 8-9, while having no significant inhibitory effect on chalcopyrite. It is suitable for low-grade, fine-grained, disseminated magnetically separated iron tailings, yielding copper concentrate with a Cu grade ≥19.22% and a recovery rate ≥72.50%. This invention solves problems such as foaming and stickiness, equipment scaling, and difficulty in meeting alkalinity standards in traditional high-alkali lime processes. It has advantages such as low alkali content, high efficiency, and environmental friendliness, and has broad prospects for industrial application.

The application discloses a galena combined inhibitor and a use method thereof, and the combined inhibitor comprises iron sulfate, sodium nitrate and jarosite, and the mass ratio of the amount of the iron sulfate, the sodium nitrate and the jarosite is 20:(4-10):(1-2). The combined inhibitor can be applied to separation of copper-lead mixed concentrate to realize lead inhibition and copper floating, and the combined inhibitor does not need to be removed. In an acid medium, after the combined inhibitor acts, not only can the combined inhibitor decompose the adsorbed reagent on the surface of the copper-lead mixed concentrate, but also can promote the galena surface to be oxidized to generate hydrophilic PbSO4 and PbO, while the chalcopyrite surface is oxidized to generate hydrophobic elemental sulfur (S 0 ), thereby expanding the floatability difference between the copper-lead sulfide, the jarosite is selectively adsorbed on the surface of the galena, further reducing floatability of the lead, and improving the copper-lead separation efficiency. The copper concentrate and the lead concentrate obtained by the application have high recovery rates, low mutual content, reusable acid liquid, low cost and environmental protection.

The application relates to a method for regulating and separating arsenic and valuable metals in smelting flue gas, and belongs to the field of clean production technology. After chalcopyrite powder is mixed into smelting flue gas, on one hand, metal oxides are converted into sulfates, and on the other hand, formed arsenate can be dissociated, arsenic is volatilized in the form of As2O3, and metals are converted into corresponding sulfates and oxides to return to a smelting system, formation of arsenate in the flue gas is inhibited, the purpose of separating arsenic and valuable metals is achieved, and the efficiency of dry collection of As2O3 in the flue gas is improved. Formation of arsenic-containing dust is reduced, and production cost of a smelting enterprise is saved.

This application provides a method for flotation separation of chalcopyrite and pyrite, relating to the field of mineral flotation. The method involves mixing and flotation of the minerals to be processed, including chalcopyrite and pyrite, with a chalcopyrite collector to obtain chalcopyrite concentrate and pyrite tailings. The general structural formula of the chalcopyrite collector is: [Formula omitted]. This chalcopyrite collector utilizes the high selective affinity of its propyne ester group for copper-active sites on the chalcopyrite surface and its inertness to iron sites on the pyrite surface, achieving precise identification and collection of chalcopyrite from the molecular structure of the reagent, significantly improving the grade and recovery rate of the copper concentrate. The R group is a hydrophobic group facing the pulp, significantly enhancing the surface hydrophobicity of the chalcopyrite particles, thereby enabling them to adhere to flotation bubbles and float.

The application discloses a high-efficiency copper-sulfur ore comprehensive recovery method and belongs to the technical field of mineral separation. First, the ore is crushed and ground to achieve the monomer dissociation among minerals, and a small amount of lime is added into the mill to adjust the pH to 8-9; diethyl thiourea and ethyl xanthate are used as a selective combined collector of chalcopyrite, and a copper concentrate is obtained after one roughing, two scavenging and two cleaning operations; the tailings after copper selection are subjected to desliming and sulfuric acid activation, and a sulfur concentrate and tailings are obtained through one roughing, three scavenging and three cleaning operations. The method uses the high-efficiency copper combined collector diethyl thiourea and ethyl xanthate, can greatly reduce the dosage of pyrite inhibitor, simultaneously reduces the use of a subsequent pyrite activator, and has the advantages of high feasibility, wide application range and high product index.

The application discloses a flotation separation method of copper sulfide ore containing easy-to-float gangue, and belongs to the technical field of ore flotation separation. First, the copper sulfide ore containing easy-to-float gangue is crushed and ground to process into ore powder. Then, the ore powder is mixed with water to adjust into an ore slurry. Then, sulfite salt inhibitor is added into the ore slurry, and the dosage is 200-500 g / t; xanthate 540 and butyl ammonium black medicine are added as a combined collector, and the dosages are 20-50 g / t and 15-40 g / t respectively; 2# oil is added as a foaming agent, and the dosage is 20-30 g / t; and stirring flotation is carried out. The flotation separation method can significantly improve the flotation selectivity and recovery rate of chalcopyrite by using the environment-friendly sulfite salt inhibitor under low-alkali conditions, and can effectively inhibit the floating of pyrite and easy-to-float gangue. After the flotation operation, the grade of copper concentrate can be more than 20%, and the recovery rate can be more than 95%; the inhibitor is environment-friendly, the dosage is small, the operation is simple, and the flotation separation method is suitable for the flotation separation of complex and difficult-to-select copper-sulfur ore.

Discloses a combined depressant for sphalerite flotation separation and its application, the combined depressant including reducing substance and anthocyanin. It is used as a combined depressant for sphalerite in the flotation separation of chalcopyrite and sphalerite or galena and sphalerite. After crushing and grinding the raw ore, the combined collector and foaming agent are added to the ore pulp for copper-zinc or lead-zinc flotation. During the copper-zinc or lead-zinc separation process, the combined depressant is added as the sphalerite depressant, isopentyl xanthate is used as the collector of chalcopyrite or galena, pine oil is used as the foaming agent, the froth product is copper concentrate or lead concentrate, and the bottom product is zinc concentrate. The combined depressant of the disclosure has a strong inhibitory effect on sphalerite and can effectively achieve flotation separation of chalcopyrite and sphalerite or galena and sphalerite.

This invention belongs to the field of photocatalytic algae removal technology, specifically relating to a nickel-containing carbon nitride-supported chalcopyrite composite material and its photocatalytic algae removal application. The invention first prepares g-C3N4 by high-temperature polymerization of a nitrogen-containing carbon-based precursor, then modifies it with nickel chloride to obtain Ni-g-C3N4. Subsequently, this is added to a precursor solution containing iron salts, copper salts, and thiourea. After hydrothermal reaction, the resulting product is calcined to obtain the nickel-containing carbon nitride-supported chalcopyrite composite material CuFeS2-Ni-g-C3N4. The nickel-containing graphitic carbon nitride-natural chalcopyrite in-situ coupled material synthesized in this invention is a photocatalytic material that combines highly efficient inactivation of Microcystis aeruginosa and degradation of algal toxins. It can directly utilize visible light such as sunlight to inactivate Microcystis aeruginosa and rapidly degrade algal toxins in flowing water, making it an environmentally friendly sterilization material with significant practical value.

This invention belongs to the field of clutch component manufacturing and discloses a novel rubber coating production process for clutch face plates. By weight, the coating compound consists of the following components: 30-40 parts nitrile rubber, 15-22 parts phenolic resin, 3-8 parts polyimide varnish, 4-7 parts nano-molybdenum disilicide, 3-6 parts boron nitride nanosheets, 4-8 parts antimony trisulfide, 5-9 parts chalcopyrite powder, 2-4 parts zinc oxide, 1-3 parts stearic acid, 1-2 parts accelerator DM, and 2-3 parts sulfur. The above components are added to a hot melt mixing device and stirred at 130-150°C for 35-45 minutes to obtain a uniform solvent-free hot melt compound. Addressing the problems of poor environmental performance, low bonding strength, insufficient heat and wear resistance, and poor performance stability in existing clutch face plate coating processes, this invention provides a novel solvent-free, high-adhesion, and high-performance clutch face plate coating production process, significantly improving the overall performance of the clutch face plate while reducing environmental pollution during production.

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.

This invention belongs to the field of mineral processing and flotation separation technology, and discloses the application and method of an oxidant-organophosphonic acid combined inhibitor in the flotation separation of copper-zinc sulfide ores. The combined inhibitor, composed of an oxidant and an organophosphonic acid reagent, is added in a stepwise manner during the flotation separation of chalcopyrite and sphalerite. Hydrogen peroxide is added first for pulp pretreatment, followed by the addition of hydroxyethylidene diphosphonic acid (HEDP), the organophosphonic acid reagent. The oxidant selectively oxidizes and regulates the surface of sphalerite, providing active sites for the adsorption of the organophosphonic acid reagent. The organophosphonic acid reagent coordinates with the metal sites on the sphalerite surface, forming a hydrophilic film and complexing activated copper ions in the pulp, achieving highly efficient and selective inhibition of sphalerite while maintaining good floatability of chalcopyrite. This invention achieves efficient separation of copper-zinc sulfide ores under medium-low alkalinity conditions, and has advantages such as good selectivity, low reagent dosage, safety and environmental friendliness, and promising industrial application prospects.

The objective is to provide a method for synthesizing quantum dots that have uniform composition, consistent particle size, and excellent luminescence properties. [Solution] A method for synthesizing chalcopyrite-based quantum dots, comprising a nanoparticle generation step of reacting a group I element with a group VI element to produce nanoparticles, and a cation diffusion step of cationically diffusing a group III element into the nanoparticles by heat treatment.

This application relates to an arsenic phase modifier, its preparation method, and its application in controlling the separation of arsenic from valuable metals in smelting flue gas, belonging to the field of clean production technology. The arsenic phase modifier is a compound or mixture having the chemical formula CuFe2S3. This invention also provides a method for obtaining CuFe2S3 by mixing chalcopyrite powder and sulfur powder and then activating the mixture through mechanical ball milling. After the arsenic phase modifier CuFe2S3 is mixed into the smelting flue gas, it consumes oxygen in the flue gas to inhibit arsenate formation and provides active sulfur components to enhance the conversion of metal oxides into sulfates. Arsenic volatilizes in the form of As2O3, thereby achieving the goal of separating arsenic from valuable metals.

The application discloses a beneficiation method for improving copper and molybdenum recovery rate of porphyry copper-molybdenum ore, which comprises the following steps: grading after grinding of the raw ore, adding XK101+8250 and BK345A+kerosene as copper and molybdenum collectors when the pH value of the ore pulp is 9-10, then the ore pulp enters into fast floating operation to obtain concentrate 1, the fast floating tailings enter into roughing operation, the pH value of the ore pulp is 11-12, XK101+8250 is added as a collector to perform intensified flotation, and concentrate 2 is obtained, so that the comprehensive recovery rate of copper and molybdenum is improved. In this way, the copper and molybdenum recovery rate can be effectively improved by combining the collectors and the chalcopyrite, chalcocite and other copper minerals in the raw ore and increasing the fast selection process. Meanwhile, the roughing operation is carried out in a high-alkali environment, and the efficient collectors are used, so that the recovery of the difficult-to-float minerals can be intensified. According to the different pH values of the ore pulp, the beneficiation reagents with economic and strong collecting capacity are screened, and the efficient recovery of the useful minerals is realized.