289 results about "Leaching (metallurgy)" patented technology

The invention relates to a method for preparing sponge iron from laterite-nickel ore hydrometallurgy tailings, which comprises the following steps: (1) carrying out acid leaching on laterite-nickel ore hydrometallurgy tailings to obtain leached residues without at least part of CaSO4; (2) oxidizing and roasting the leaching residues obtained in the step (1), so that at least part of sulfate is discharged as sulfur-containing gas; performing hydrogen reduction to obtain a reduced material; and (3) the reduction material in the step (2) is sequentially subjected to ore grinding and magnetic separation, and the sponge iron with the Fe content being 90 wt% or above and the S content being 0.01 wt% or below is obtained. According to the method, iron resources in the laterite-nickel ore hydrometallurgy tailings are recycled, desulfurization and reduction are carried out step by step, the desulfurization efficiency is improved, the reduction temperature is reduced, and the sponge iron with the Fe content being 90 wt% or above and the S content being 0.01 wt% or below is obtained.

The invention belongs to the technical field of hydrometallurgy, and particularly relates to a pretreatment method for improving the leaching rate and the carbon adsorption rate of high-sulfur-arsenic gold ore. Comprising the following steps that the high-sulfur-arsenic gold ore is ground and then prepared into ore pulp; a green oxygen activating agent and hydrogen peroxide are sequentially added into the ore pulp, oxidation pretreatment is conducted on the high-sulfur-arsenic gold ore, ore pulp activating liquid is formed, and the green oxygen activating agent is a mixture of calcium oxide, sodium persulfate and soluble bivalent iron salt; and adding a gold leaching agent into the ore pulp activation solution, adjusting the pH value of the ore pulp to 9-12, carrying out stirring gold leaching treatment, filtering to obtain a leaching solution, and then adding activated carbon to adsorb and extract gold. According to the method, a stronger oxidation environment is provided, meanwhile, the residual concentration of arsenate radicals in the solution is effectively reduced, the leaching rate of gold and the adsorption rate of activated carbon are greatly increased, excellent oxidation performance and environment friendliness are shown, and a more sustainable high-sulfur-arsenic gold ore pretreatment process is provided.

The invention relates to a method for recovering lithium and fluorine from aluminum electrolysis hazardous waste, which comprises the following steps: firstly, mixing organic polyol and alkaline hydroxide according to a molar ratio of 1: (0.5-2) to obtain a eutectic solvent; heating the eutectic solvent to 80-150 DEG C, and adding a proper amount of raw material fine powder and calcium oxide for reaction leaching; carbonating and filtering the leachate to obtain lithium carbonate; washing the leaching residues with an acetic acid solution to obtain a calcium fluoride product; the concentration of fluorine ions in the leachate is smaller than or equal to 200 ppm, and the purity of calcium fluoride is larger than or equal to 90%; the leaching rate of lithium in the method is greater than 85%; the slag feeding rate of fluorine is greater than 95%; and no hydrogen fluoride gas is generated in the method. According to the method, a non-toxic and biodegradable eutectic solvent is adopted as a leaching agent, and efficient leaching of lithium and fluorine in the aluminum electrolysis dangerous waste materials is achieved; calcium oxide is used as a precipitating agent, free fluorine is promoted to be precipitated and recycled as calcium fluoride, the whole process meets the requirement of green metallurgy, and the win-win situation of resources and the environment is achieved.

The invention provides a comprehensive utilization method of clay type lithium ore, and relates to the field of hydrometallurgy. The comprehensive utilization method of the clay type lithium ore comprises the following steps: mixing the clay type lithium ore with concentrated sulfuric acid, and carrying out low-temperature roasting at the temperature of 100-300 DEG C to obtain a roasted cured material; adding water into the roasted and cured material, leaching, and carrying out solid-liquid separation to obtain a lithium-rich aluminum leaching solution; adsorbing the lithium-rich aluminum leaching solution by using an aluminum ion sieve adsorbent to obtain an aluminum-rich adsorbed solution and a lithium-loaded ion sieve; analyzing the lithium-loaded ion sieve to obtain a lithium-rich desorption solution; the lithium-rich desorption solution is sequentially subjected to purification and lithium precipitation, and battery-grade lithium carbonate is obtained; sequentially carrying out iron removal, purification and impurity removal on the aluminum-rich adsorption post-liquid to obtain iron slag and an aluminum sulfate solution; and sequentially carrying out aluminum precipitation and roasting on the aluminum sulfate solution to obtain the metallurgical-grade aluminum oxide. The method has the advantages of high-efficiency leaching of lithium and aluminum, high-efficiency separation of lithium and aluminum, environment friendliness, simple process and the like.

The invention provides a flotation pretreatment reagent system and a method for treating gold-bearing waste soot and recycling gold through the flotation pretreatment reagent system, and belongs to the technical field of hydrometallurgy. According to the invention, a multi-agent synergistic agent system is designed, a gold recovery system of'catalytic oxidation-bridging anchoring-hydrophobic flotation 'is constructed, and strategy transformation from passive inhibition of carbon adsorption to active separation of a carbon carrier is successfully realized. Compared with a traditional method which only tries to passivate the adsorption activity of carbon, the method has the advantages that gold-robbing carbon interfering with gold recovery is converted into a flotation carrier easy to separate through accurate reagent matching, and the problem that carbonaceous interferes with cyaniding gold extraction is fundamentally solved. The modified carbon agglomerates are subjected to efficient flotation separation due to the excellent hydrophobic characteristic, and the gold is enriched in the tailings due to the fact that the gold is not hydrophobized. According to the method, the gold recovery rate of follow-up cyanidation leaching is remarkably increased, the agent consumption is greatly reduced, and the important technical value of achieving technological process innovation through molecular-level collaborative design is shown.

The invention relates to a method for recovering tellurium from copper anode slime through cooperation of ultrasound and hydrogen peroxide, and belongs to the field of wet metallurgy of scattered metal. The method comprises the following steps: drying and grinding copper anode slime to obtain copper anode slime powder; the method comprises the following steps: adding copper anode slime powder into a sulfuric acid solution, mixing to obtain copper anode slime slurry, adding hydrogen peroxide into the copper anode slime slurry, carrying out ultrasonic enhanced leaching for 20-160min, and carrying out solid-liquid separation to obtain a leaching solution containing copper and tellurium and high-grade valuable metal leaching residues. According to the method, hydrogen peroxide is effectively promoted to be decomposed by ultrasound to generate hydroxyl radicals, the oxidation potential of a system is regulated and controlled, copper and tellurium are selectively converted into copper ions, tellurate radicals enter a solution, and valuable elements such as gold, silver and selenium are enriched in slag; necessary heat is provided for the reaction by utilizing the heat effect of ultrasonic and heat released by chemical reaction, and extra heating is not needed; strong jet flow generated by ultrasound effectively destroys raw material inclusion and secondary wrapping, reaction mass transfer is enhanced, and the leaching rate of tellurium is increased. The method disclosed by the invention is simple in leaching process operation, low in cost and high in reaction speed.

The invention provides a laterite-nickel ore leaching solution catalytic oxidation-fractional precipitation method, and relates to the field of hydrometallurgy, the method comprises the following steps: adding a catalytic oxidant and a first neutralizer into a laterite-nickel ore leaching solution to obtain a first filtrate and iron slag; adding a catalytic oxidant, a second neutralizer and a first coalescing agent into the first filtrate to obtain a second filtrate and a second precipitate; adding a third neutralizer and a first reducing agent into the second filtrate to obtain a nickel-cobalt precipitate and a third filtrate; adding a fourth neutralizer and a second reducing agent into the third filtrate to obtain a fourth precipitate and a fourth filtrate; mixing the second precipitate with a third reducing agent, performing reduction leaching, and adding a second coalescing agent and a fifth neutralizing agent to obtain a silicon-aluminum precipitate and manganese-scandium filtrate; the manganese-scandium filtrate is extracted, and manganese enters raffinate; and adding a catalytic oxidant and a sixth neutralizer into the raffinate to obtain the manganese oxide. Elements are recycled step by step, and the method has the advantages of multiple types of recycled elements, less resource waste and the like.

The invention belongs to the technical field of metallurgy, and discloses a hydrogen reduction dissolution method for bauxite. Comprising the following steps: mixing bauxite and circulating mother liquor to form raw ore pulp, adding a reducing agent, and performing Bayer process reduction dissolution; the reducing agent is hydrogen. According to the method, impurity-free and low-energy-consumption efficient dissolution is realized by introducing the gas-phase reducing agent hydrogen, red mud discharge is reduced from the source, and the recovery rate of valuable components is increased.

The invention discloses a metallurgical solid waste all-component collaborative recovery and high-value utilization method, and belongs to the technical field of metallurgical resource recycling and green metallurgy. According to the method, blast furnace gas sludge, iron-manganese slag and vanadium extraction converter sludge are synergistically blended, and after briquetting and drying, reduction smelting is carried out in an inert atmosphere. Reducing the iron into molten iron; volatile metals such as zinc, indium and gallium are evaporated and enter flue gas, and gallium-indium alloy, crude zinc and residual ash are recovered in a graded manner through a multi-stage condensation system; the slag is subjected to acid leaching to enrich scandium, the leaching liquid is separated to extract vanadium, manganese and scandium, and the leaching slag is used for preparing low-carbon cement. According to the method, all-component collaborative recovery of valuable metals in various metallurgical solid wastes and building material utilization of residual solid wastes are realized, and the method has the advantages of high resource efficiency and environmental friendliness.

The invention relates to the technical field of rare earth secondary resource recovery and chemical metallurgy, in particular to a method for roasting and recovering rare earth in neodymium iron boron waste. The invention discloses a method for roasting and recovering rare earth in neodymium iron boron waste. The method comprises the following steps: mixing materials; performing flash chlorination roasting; quenching and leaching; and recovering iron. According to the method, the neodymium-iron-boron waste is finely ground and then fully mixed with zinc chloride powder, zinc chloride is rapidly melted at the reaction temperature of 350-550 DEG C, high-activity ZnCl liquid drops and HCl gas are generated, the ZnCl liquid drops and the HCl gas are subjected to instantaneous and violent gas-solid-liquid-solid reaction with waste particles in a suspended state, rare earth elements are efficiently converted into water-soluble rare earth chlorides, and the rare earth chlorides are recycled. The rare earth and the iron are basically converted into magnetic oxide insoluble in water, efficient separation of the rare earth and the iron can be achieved through simple hot water leaching, a pure rare earth chloride solution and high-grade iron ore concentrate are obtained, the technological process is extremely short, the reaction efficiency is high, and the rare earth recovery rate and the selectivity are both good.

The application belongs to the technical field of metallurgy, and relates to a method for efficiently purifying and directionally removing oxygen and impurities from a precious antimony alloy, which comprises the following steps: S1, after the precious antimony alloy is melted, an arsenic-tellurium removal agent is added, and smelting is performed at 600-610 DEG C to obtain a pre-impurity removal alloy melt and an arsenic-tellurium residue; the arsenic-tellurium removal agent is a mixture of sodium hydroxide and sodium nitrate; S2, the pre-impurity removal alloy melt obtained in step S1 is heated to 620-640 DEG C, a reducing agent is added, and smelting is performed to obtain an arsenic alkali residue and a refined antimony alloy; the reducing agent is a mixture of antimony sulfide and sodium hydroxide; S3, the arsenic-tellurium residue obtained in step S1 and the arsenic alkali residue obtained in step S2 are ball milled, leaching and filtration are performed to obtain a filtrate and a filter residue; S4, the filtrate obtained in step S3 is mixed with sulfuric acid, and after reaction, a neutralization residue and a neutralization liquid are obtained. By introducing the efficient arsenic-tellurium removal agent and the reducing agent, the content of antimony in the arsenic alkali residue is significantly reduced, and the direct recovery rate of antimony and the recovery rate of tellurium are effectively improved.

The invention relates to the technical field of hydrometallurgy, in particular to a selective leaching method of alkaline hydroxide ore, which comprises the following steps: fully mixing the alkaline hydroxide ore, an ammonium leaching agent and water to react, and obtaining reaction slurry after the reaction is finished; carrying out solid-liquid separation on the obtained reaction slurry to obtain a leaching solution I and a leaching residue I, and collecting the leaching solution I; s3, mixing the leached residues I with water for slurrying to obtain leached residue slurry; and S4, an acid leaching agent and a reducing agent are added into the leaching residue slurry under the conditions of heating and stirring, solid-liquid separation is conducted after full reaction, second leaching liquid and second leaching residues are obtained, and the second leaching liquid is collected. According to the leaching method, the follow-up impurity removal difficulty can be reduced while the leaching rate of cobalt, manganese and nickel of the alkaline hydroxide ore can be increased.

A comprehensive utilization method of beneficiation-metallurgy-chemical combination for germanium-rich lignite includes the following steps: 1) germanium-rich lignite sizing and grinding, 2) catalytic pre-oxidation, 3) nitric acid leaching, and 4) recycling and enrichment of germanium solution. The high effective extraction of germanium from the germanium-rich lignite was achieved via a combination of mineral beneficiation, hydrometallurgy, and chemical processing. Meanwhile, a high yield and high degree of depolymerization humic acid product was produced as byproducts. This method could not only effectively avoid high carbon emission and organic resource waste during conventional germanium-rich lignite pyrometallurgical processing, but also could produce humic acid as quality raw materials for metallurgical and agricultural industries, which has advantages of less environmental pollution, high extraction efficiency, and low comprehensive costs.

The application provides a beryllium glass leaching solution purification method, and belongs to the technical field of hydrometallurgy, and comprises the following steps: the beryllium glass leaching solution is heated to a preset temperature, and an alkaline calcium-based ore slurry is added to carry out pre-neutralization reaction to obtain a pre-neutralized solution; the pre-neutralized solution is subjected to first liquid-solid separation treatment to obtain a pre-neutralized liquid and a filter residue; the pre-neutralized liquid is subjected to deep iron and aluminum removal treatment according to a first deep iron and aluminum removal route or a second deep iron and aluminum removal route to obtain a beryllium-containing leaching solution and an iron and aluminum-containing leaching residue, so as to complete the purification of the beryllium glass leaching solution; the first deep iron and aluminum removal route comprises neutralization reaction treatment, second liquid-solid separation treatment and first pressure leaching treatment; the second deep iron and aluminum removal route comprises oxidation neutralization reaction treatment and second pressure leaching treatment. The application can solve the problems of existing technologies, such as the introduction of impurities, strict control, complex process and large beryllium loss.

The invention discloses a method for efficiently leaching and extracting germanium from germanium-containing zinc oxide smoke dust based on ultrasonic strengthening, and relates to the technical field of metal metallurgy, the method comprises the specific steps of raw material pretreatment, ultrasonic-assisted leaching, solid-liquid separation and zinc powder replacement germanium precipitation, germanium-enriched slag strengthened leaching and germanium enrichment and purification; according to the method, the ultrasonic leaching device is introduced, the leaching efficiency of germanium in the germanium-containing zinc oxide smoke dust is improved, passive films on the surfaces of smoke dust particles are effectively damaged through the action of the ultrasonic leaching device, permeation of a leaching agent into the particles is accelerated, and therefore efficient leaching of germanium is achieved within a short time, and meanwhile the leaching efficiency of germanium in the germanium-containing zinc oxide smoke dust is improved. According to the method, the leaching rate of germanium is increased by optimizing the proportion and leaching conditions of the mixed leaching agent, the germanium slag leaching solution is merged into the initial leaching solution, and a secondary enhanced leaching process of a subsequent zinc powder replacement germanium precipitation procedure is carried out, so that the maximum recovery of germanium resources is ensured, the overall resource utilization rate is increased, and the production cost is reduced.

The application provides a method for separating selenium tellurium from high-selenium tellurium dioxide through multistage conversion, and belongs to the technical field of non-ferrous metallurgy. The method comprises the following steps: a, material preparation; b, primary conversion leaching: selectively reducing selenium in a solution containing a reducing agent at pH 8-11 to obtain a selenium tellurium-containing residue and a primary leaching solution; c, secondary conversion leaching: selectively leaching tellurium in a strong alkaline solution containing a reducing agent to obtain elemental selenium and a secondary leaching solution; and d, neutralization treatment: combining the two leaching solutions and adding acid to obtain high-purity tellurium dioxide. The method is simple to operate, short in production cycle, and realizes efficient separation of selenium tellurium. The purity of the obtained elemental selenium is greater than or equal to 95%, the purity of the obtained tellurium dioxide meets the requirements of electrodeposition for producing 4N tellurium, and the method is suitable for large-scale production.

The invention discloses a method for preparing polyaluminum chloride from fly ash through mechanical activation and ammonium sulfate roasting and synchronously removing calcium, and particularly relates to the field of hydrometallurgy and solid industrial waste treatment. Adding ammonium sulfate powder into the ground fly ash obtained in the step S1, carrying out a roasting process, carrying out sulfuric acid leaching, adding calcium hydroxide at the same time, and carrying out solid-liquid separation; by adopting the ground fly ash, favorable conditions are created for roasting the ammonium sulfate powder and the aluminum compound. According to the technology, the aluminum element in the fly ash can be efficiently extracted within 30 minutes, resource utilization of solid waste is promoted, aluminum resources in the ash residues are recycled to the maximum extent, and the problems proposed in the background technology are solved.

The invention belongs to the technical field of zinc smelting, and discloses a method for producing a high-zinc high-iron acid solution through zinc hydrometallurgy and removing iron in an oxygen pressure kettle at medium temperature. According to the oxygen-enriched pressurized direct leaching process based on zinc hydrometallurgy, in order to improve various economic and technical indexes, a high-zinc and high-iron acid solution is produced after process technology optimization is carried out. Then, the first-stage high-zinc high-iron acid solution is treated, an oxygen pressure kettle medium-temperature iron removal method is adopted, the iron content of the obtained iron-removed solution is 0.5-1.5 g / L, the iron-removed solution is fed to neutralization iron removal operation, the dosage of a neutralizer and the dosage of an oxidizing agent are reduced, and a qualified iron-removed supernatant solution is obtained; and hematite with iron content of more than or equal to 55% in the slag sample is obtained, and byproducts have value of sale. According to the method, efficient separation of zinc and iron is achieved, the slag rate of the system is reduced, and safe, continuous and stable operation of the full-wet-process pressure leaching zinc smelting system is guaranteed.

The invention discloses an in-situ leaching liquid injection system and method for high-altitude ionic rare earth ore, and belongs to the field of rare earth hydrometallurgy. The system is composed of a liquid injection well pattern, a layered liquid injection device, a first liquid supply system, a second liquid supply system and a collection system. Exploring the thickness of an ore body weathering crust and vertical distribution of rare earth / impurities; the liquid injection hole is vertically divided into an upper layer liquid injection area (1 / 3-1 / 2 of the upper part) and a lower layer liquid injection area (1 / 2-2 / 3 of the lower part); a 1.0-1.4 wt% low-concentration diethylenetriamine-ammonium acetate composite leaching agent is injected into the upper layer, and co-leaching of impurities such as aluminum and iron is reduced; 1.5-2.5 wt% of high-concentration diethylenetriamine-ammonium acetate composite leaching agent is injected into the lower layer to ensure efficient leaching of rare earth; and rare earth-rich leaching liquid is collected. Compared with a traditional full-layer high-concentration process, the method has the advantages that the use amount of a leaching agent is reduced by 20-40% while the rare earth leaching rate is kept to be larger than or equal to 90%, the aluminum ion concentration of the leachate is reduced by 30-60%, the agent cost and the follow-up impurity removal load are remarkably reduced, and the method is particularly suitable for the high-altitude, low-temperature, low-air-pressure and thick-weathered crust environment.

The invention discloses a smelting process of high-iron high-lead zinc concentrate, and belongs to the technical field of comprehensive utilization of resources, and the method specifically comprises the following steps: carrying out normal-pressure leaching on the high-iron high-lead zinc concentrate and oxygen pressure leaching liquid to produce normal-pressure leaching residues and normal-pressure leaching liquid, and carrying out mineralization iron removal on the normal-pressure leaching liquid to produce iron concentrate; the normal-pressure leaching residues are subjected to traditional sulphide ore dressing, and high-lead residues and low-lead zinc concentrate are produced; the low-lead zinc concentrate and the zinc hydrometallurgy electrolyte are subjected to high-temperature oxygen pressure leaching, silver-sulfur concentrate and ferric-iron-containing high-acid oxygen pressure leaching liquid are produced, and the ferric-iron-containing high-acid oxygen pressure leaching liquid is returned to be used for normal-pressure leaching; directly hot-melting and filtering the silver-sulfur concentrate to produce sulfur and silver concentrate; according to the method, the normal-pressure leaching, mineral separation and oxygen pressure leaching combined process is adopted, the leaching process and the oxygen pressure leaching slag treatment process are simplified, high-lead slag, iron ore concentrate and silver-sulfur concentrate are directly produced in the smelting process instead of mixed slag with low content of lead, iron, sulfur and silver in a traditional oxygen pressure leaching process, the silver enrichment ratio in final leaching slag is high, and the sulfur recovery process is simple.

The invention provides a chemical oxidation pretreatment agent system and a method for treating low-grade high-sulfur gold ore through the chemical oxidation pretreatment agent system, and belongs to the technical field of metal hydrometallurgy. According to the method, a pretreatment agent system is designed, and low-grade resources are economically and efficiently recycled by optimizing the whole technological process of sulfur separation enrichment, targeted pretreatment and concentrated leaching and key operation parameters. According to the method, firstly, high-sulfur ore is artificially divided into high-sulfur first-section gold concentrate and low-sulfur second-section gold concentrate through ore grinding and flotation, and most sulfide wrapping gold is concentrated in the high-sulfur first-section gold concentrate; and then, the high-sulfur first-stage gold concentrate is subjected to a pretreatment process, and the wrapping structure of sulfide on gold is deeply destroyed selectively through superfine grinding and a pretreatment agent, so that the subsequent cyanidation leaching rate is effectively increased. Through fine grinding, flotation and step-by-step pretreatment, the pretreatment amount and the total treatment amount in follow-up cyanidation leaching are reduced, and the overall energy consumption and cost of cyanidation leaching of the low-grade high-sulfur-content gold ore are reduced from the source.

The invention discloses a method for producing cuprous oxide by utilizing low-grade purified copper slag in a zinc hydrometallurgy process, and belongs to the technical field of purified copper slag. The invention relates to a method for producing cuprous oxide by utilizing low-grade purified copper slag in a zinc hydrometallurgy process. The method mainly comprises the following steps: acid leaching and impurity removal; the pre-leached filter residues are mixed with dilute sulphuric acid, air is introduced to serve as an oxidizing agent for oxidation leaching, after leaching, the pH is adjusted to 4.0-5.0 through CaCO3, and copper-containing leaching liquid is obtained through filtering; adding dextrose monohydrate into the copper-containing leachate, and adjusting the pH value by using NaOH; according to the method, through the closed-loop process of acid presoaking impurity removal, air oxidation leaching, glucose reduction and cuprous oxide Cl <-> removal, conversion from harmless treatment to resource high-value utilization of the low-grade copper slag is achieved, air is used for replacing KMnO4, MnO2 and other chemical oxidants, the cost is reduced, no harmful by-product exists, the green metallurgy requirement is met, and the method is suitable for industrial production. The prepared cuprous oxide is directly used for removing Cl <-> from a supernatant in electrolytic zinc, and the double contradiction of copper slag dilution and high cost of a Cl <-> removing agent in the industry is solved.

The invention relates to a method for recycling valuable metals in low-grade nickel ore by using a chlorination metallurgy process, and aims to efficiently extract valuable metals such as nickel, copper, cobalt and magnesium. The method comprises the steps of mineral aggregate pretreatment, two-stage chloridizing roasting, screening separation, leaching treatment, chloridizing leaching, iron removal, copper removal, extraction separation, pH adjustment, electrodeposition and the like. By optimizing two-stage fluidizing chlorination parameters, selective separation of impurities such as iron and zinc from nickel and cobalt is achieved, and tedious pretreatment is avoided. A chlorine closed-loop circulation design is adopted, so that internal circulation of a chlorine element is constructed, and reagent consumption and metal entrainment loss are reduced. The nickel, the cobalt and the magnesium are synchronously recycled through multi-metal synergistic extraction and an innovative extraction-electrodeposition coupling process, and particularly the problem of magnesium recycling is solved. The method has the advantages of short process integration, precise separation, cyclic utilization, system balance optimization and the like, the comprehensive metal recovery rate and economic benefits of low-grade ore are remarkably improved, stepped recovery of precious metal and main metal is achieved, and the lean ore resource utilization rate is remarkably improved.

The invention discloses a dressing and smelting combined treatment method for tungsten-tin bulk concentrate, and belongs to the technical field of mineral processing. The method comprises the steps that tungsten-tin bulk concentrate obtained through flotation of a metal ion-hydroximic acid complex collecting agent from tungsten-tin polymetallic ore under the low-alkalinity condition is directly subjected to size mixing, flotation is conducted under the high-alkalinity condition, and bulk concentrate of wolframite and cassiterite and scheelite concentrate are obtained; leaching the scheelite concentrate by using mixed acid to obtain a tungstate-containing acid leaching solution and gypsum; bulk concentrate of wolframite and cassiterite is decomposed through alkaline process autoclaving to obtain tungsten-containing alkaline leaching liquid and tin-rich slag, and cassiterite is recycled from the tin-rich slag through centrifugation. According to the method, OH <-> is used for precisely regulating and controlling the coordination structures of the collecting agents, and efficient separation of scheelite, wolframite and cassiterite is achieved by means of the adsorption characteristic difference of the collecting agents of different coordination structures on the wolframite and the scheelite. And then wet metallurgy is combined to achieve clean and efficient utilization of tungsten resources in the tungsten-tin bulk concentrate and comprehensive recovery of tin resources, and huge economic and environmental benefits are achieved.

The application provides a method for deep vanadium extraction from vanadium-containing steel slag, and belongs to the technical field of vanadium chemical metallurgy.The vanadium-containing steel slag, sodium chloride and coke powder are mixed and then dry ball-milled, sodium chloride penetrates into the mineral lattice during the dry ball-milling process to cause expansion and reduce the vanadium-oxygen bond energy.The coke powder can promote the reduction of vanadium spinel and other vanadium-containing substances during the dry ball-milling process, which is beneficial to the leaching of vanadium.The application fully converts the insoluble vanadium into soluble vanadium by wet ball-milling of the activated vanadium-containing steel slag powder and sodium carbonate solution under the condition of oxygen-containing gas being introduced;meanwhile, Cl ‑ forms soluble complex with Ca 2+ and Mg 2+ , which is beneficial to the leaching of vanadium.The application can dissociate the insoluble phase that is not dissociated in the leaching residue by roasting the leaching residue, and then can further leach the residual vanadium in the clinker by acid leaching with sulfuric acid solution, so as to reduce the content of vanadium in the tailings.

The application discloses a kind of dehydration and recycling method of electrolytic manganese dioxide leaching residue, it is related to the field of hydrometallurgy and chemical solid-liquid separation technology.The method is aimed at the technical problems of low dehydration efficiency, insufficient manganese element recovery and high comprehensive energy consumption in the prior art, after neutralization and composite flocculant flocculation of leaching solution, multi-stage electric field treatment is carried out in turn, including applying alternating electric field in the sedimentation tank for pre-aggregation, applying direct current electric field in plate and frame filter press for pressure filtration dehydration and applying pulse electric field before unloading for deep dehydration, finally unload filter cake and collect filtrate.The method is mainly used for efficient dehydration of leaching residue in the production process of electrolytic manganese dioxide and maximization of manganese resource recovery, to realize energy saving and emission reduction and resource recycling.

The application provides a gold mine rolling bottle leaching experiment system and experiment method, relates to the hydrometallurgy technical field, and the system comprises: the central controller and the multi-axis mechanical arm which are electrically connected; the central controller is used for obtaining and analyzing a preset experiment task to obtain a job instruction sequence; according to each job instruction, a control signal is sent to the multi-axis mechanical arm; the multi-axis mechanical arm is used for grabbing a rolling bottle to a weighing platform when receiving an empty bottle grabbing signal; according to a solid sample adding signal, a sample adding speed is determined, and the gold mine powder is added to the rolling bottle at the sample adding speed; when receiving a first moving signal, the rolling bottle is transported from the weighing platform to a liquid sample adding station; when receiving a liquid sample adding signal, the rolling bottle is injected with acid and alkali liquid; when receiving a cap screwing signal, the rolling bottle is transported to a cap screwing station and is sealed by screwing a cap; when receiving a second moving signal, the rolling bottle is transported to a preset clamping position of a rolling bottle machine to realize rolling bottle leaching. The application improves the experiment efficiency of the gold mine rolling bottle leaching experiment.

The invention relates to the technical field of mineral processing and environment-friendly chemical agents, in particular to a novel environment-friendly gold extraction agent and a preparation method thereof. The method aims at solving the problems that in existing gold hydrometallurgy, a traditional cyanide gold extraction agent is highly toxic and pollutes the environment, and the environment-friendly gold extraction agent is insufficient in the aspects of leaching efficiency, preparation and application convenience, energy consumption and universality. The method is characterized by comprising the following steps: mixing a bio-based organic complexing agent aqueous solution with the weight-average molecular weight of 500-2000 with an oxidizing agent, adjusting the pH value, adding an inorganic salt auxiliary agent, heating for reaction, and finally carrying out spray drying to obtain the powdery gold extraction agent. By the adoption of the technical scheme, the effects of being environmentally friendly, low in toxicity, high in leaching efficiency, high in universality to complex ore, low in preparation energy consumption, rapid in product dissolution, convenient and fast to apply and the like can be achieved.

The invention relates to the technical field of metallurgy of rare metals, provides a preparation method and application of a molybdenum extracting agent of colloidal graphite powder modified coconut shell charcoal, and solves the problems that in the prior art, a method for leaching molybdenum through oxidizing roasting or strong acid and strong alkali is unsafe and not environmentally friendly. Comprising the following steps: S1, crushing waste Hainan coconut shells or golden coconut shells into powder, then mixing with colloidal graphite powder, and carbonizing in a muffle furnace at 300 DEG C for 62 minutes; s2, CF3SO3H with the concentration of 0.20 mol / L to 0.21 mol / L is added; and S3, after uniform stirring, standing reaction is performed for 11 h, and the molybdenum extracting agent with the colloidal graphite powder modified coconut shell charcoal is prepared.

The invention relates to a method for deep defluorination and fluorine recycling of an electrodeposited zinc leaching solution, and belongs to the technical field of hydrometallurgy and resource recycling. Aiming at the industrial problems of poor production stability, serious equipment corrosion, cathode passivation and the like caused by circulating enrichment of fluorine ions in a zinc hydrometallurgy system and the defect that an existing fluorine removal technology cannot realize effective open circuit and resource recovery of fluorine elements, the invention provides a synergistic process system of targeted adsorption, mild desorption and directional precipitation. A high-performance composite adsorption material is applied, and a multi-stage countercurrent adsorption, efficient desorption regeneration and closed-loop precipitation recycling technology is designed. According to the method, efficient selective removal of fluorine ions is achieved in a zinc hydrometallurgy system, fluorine elements are opened and recycled in the form of calcium fluoride products, and a circulating chain of fluorine is thoroughly broken. The method is high in process compatibility, low in operation cost and free of secondary pollution, and a solution is provided for green upgrading and resource circulation of the zinc hydrometallurgy industry.