620 results about "Leaching (metallurgy)" patented technology

The invention provides a method for leaching copper-cobalt sulfide ore under efficient oxygen pressure, and relates to the technical field of metallurgy. The method for efficiently leaching the copper-cobalt sulfide ores under the oxygen pressure comprises the following steps: mixing materials including the copper-cobalt sulfide ores, sulfuric acid and water, slurrying, and then carrying out an oxygen pressure leaching reaction; and after the oxygen pressure leaching reaction is finished, solid-liquid separation is carried out, and leaching residues and leaching liquid are obtained. According to the method, the self-exothermic reaction of the excess sulfur element in the copper-cobalt sulfide ore is utilized, additional heating is not needed in the reaction process, then the oxygen pressure leaching reaction can be rapidly completed at a high temperature in a short time, and SO2 is not generated in the reaction process. The method for high-efficiency oxygen pressure leaching of the copper-cobalt sulfide ore has the advantages of being high in reaction speed, low in reaction energy consumption, easy to operate, environmentally friendly, easy to achieve industrial application and the like.

The invention provides a gold leaching agent for treating high-carbon gold-bearing minerals and a gold leaching process, and belongs to the technical field of hydrometallurgy. According to the gold leaching agent, guanidinium thiocyanate is used as an agent main body, a hydroximic acid compound is used as a complexing synergist, and soluble inorganic salt of ferric iron is used as a competitive adsorbent. In a leaching system, guanidine thiocyanate can be decomposed to generate guanidine, sodium sulfide, sodium thiocyanate and water. Thiourea anions are converted into cyanamide under the alkaline condition, then cyanamide is slowly released and decomposed into cyanide ions, the cyanide ions are complexed with gold ions, and gold leaching is achieved. Namely, guanidinium thiocyanate has the effect of releasing the cyanide ions step by step, and slow release of the cyanide ions is realized. The gold leaching agent system does not contain cyanide (sodium cyanide, potassium cyanide and the like) and is a clean and environment-friendly agent system, and efficient leaching of gold in high-carbon gold-bearing minerals can be achieved through the synergistic effect of all functional agent components.

A green method for producing a nickel-cobalt-manganese new energy raw material from laterite nickel ore based on hydrometallurgy, mainly comprising ore blending, ore washing, ore separation, pressurization leaching or oxygen pressure leaching, cyclic leaching and neutralization, counter-current washing, multi-segment removal of iron chromium aluminum, multi-segment synthesis of nickel-cobalt-manganese hydroxide, ion extraction, preparation of a nickel-cobalt-manganese mixed salt solution, preparation of a separate nickel-cobalt-manganese salt solution, preparation of a nickel-cobalt-manganese mixed salt crystal, preparation of a separate nickel-cobalt-manganese salt crystal, preparation of a ternary precursor, comprehensive treatment of wastewater, waste gas, and waste residue, and other techniques and processes. Efficient simultaneous extraction of nickel-cobalt-manganese is achieved; ferrochrome, copper, zinc, scandium and other valuable metal elements are effectively recovered; a nickel-cobalt-manganese raw material meeting the requirement of a high-nickel ternary battery is produced; and a ternary precursor material directly used for manufacturing of the ternary battery is manufactured.

The invention discloses a deep learning and automatic control chemical reactor and a resource recovery method, and relates to the technical field of hydrometallurgy, and the deep learning and automatic control chemical reactor comprises a chemical reactor, a motor, a heating device, a monitoring device, a data center and a PLC control system. Based on a PLC control system, a Transform-LSTM time sequence prediction model is integrated, so that real-time monitoring of parameters such as mixed liquid temperature, reaction chamber pressure, mixed liquid viscosity, conductivity and the like in a wet leaching reaction process can be realized; and the heating power of the heating device, the rotating speed of the motor, the raw material adding amount of the feeding port, the mixed material discharging time of the discharging port and the air displacement of the air exhaust port can be automatically and accurately controlled. The problems that stirring efficiency is low, parameter regulation and control are lagged, and manual experience is relied on are solved, through a predictive control strategy, the real-time monitoring and dynamic regulation level is remarkably improved, the wet leaching process is optimized, energy consumption is reduced, the high-grade metal leaching efficiency is improved, and the method is suitable for various wet metallurgy processes.

The invention provides a method for recycling scandium, iron and aluminum from acid leachate through fractional precipitation, and belongs to the field of hydrometallurgy. The method comprises the following steps: adding a reducing agent into an acid leaching solution to obtain a first modified leaching solution; adding a stable complexing agent into the first modified leaching solution to obtain a second modified leaching solution; adding a pH regulator into the second modified leaching solution, and regulating the pH value of the second modified leaching solution to 3.5-4.5 to obtain a coarse scandium product and a scandium precipitation solution; an oxidizing agent is dropwise added into the scandium precipitation solution, and an iron product and an iron precipitation solution are obtained; and adding a pH regulator into the iron precipitation liquid to regulate the pH value of the iron precipitation liquid to be greater than or equal to 6.0, and carrying out ultrasonic enhanced aluminum ion precipitation to obtain an aluminum product and an aluminum precipitation liquid. Selective modification of metal ions is achieved by adding a reducing agent and a complexing agent, scandium is precipitated through pH regulation and control, iron is precipitated through oxidation regulation and control, and finally complexation and precipitation of aluminum are blocked, so that the separation efficiency of scandium, iron and aluminum in the acid leaching solution is improved at the same time.

The invention relates to the technical field of hydrometallurgy, in particular to a method for selectively leaching and separating cobalt and manganese from crude cobalt hydroxide leaching residues. The separation method provided by the invention comprises the following steps: S1, pre-reduction treatment; and S3, cobalt is leached through selective oxidation, and manganese is precipitated. According to the separation method, the synergistic effect of ORP and pH is regulated and controlled, proper reducing agents and oxidizing agents are selected, cobalt is selectively leached through step-by-step oxidation, dissolution of manganese is inhibited, manganese circularly entering a leaching and extraction system is reduced, the leaching and extraction operation cost is reduced, meanwhile, a selective complexing agent is introduced, impurity co-dissolution is reduced, the subsequent purification process is simplified, and the method is suitable for industrial production. The preparation method is simple to operate and easy for industrial production, and has a good application prospect.

The invention belongs to the technical field of slag metallurgy, and relates to a coprocessing method for copper smelting slag and zinc leaching slag, which comprises the following steps: S1, mixing the copper smelting slag, the zinc leaching slag, a vulcanizing agent and a flux to obtain a mixture; introducing a mixture of pulverized coal and air, and reacting at 1150-1300 DEG C for 2-4 hours to obtain a gas phase, a slag phase and matte; s2, the gas phase is subjected to dust removal, and zinc oxide smoke dust rich in zinc, lead and silver is obtained; zinc is leached from the zinc oxide smoke dust through a wet method; and S3, the slag phase is subjected to slow cooling, ore grinding and copper flotation, copper concentrate is obtained, and gold, silver and copper elements are recycled. According to the method, heat of the high-zinc hot-state copper smelting slag is used for processing the high-copper normal-temperature zinc hydrometallurgy slag, and the slag processing energy consumption of the zinc hydrometallurgy slag is reduced. Through mixing treatment, lead and zinc in the mixed slag enter the secondary zinc oxide smoke dust to be recovered, and the recovery rate of the lead and the recovery rate of the zinc both reach 80% or above; and the total recovery rate of copper in the mixed slag is greater than 85% after copper enters matte recovery.

The invention relates to the technical field of vanadium metallurgy, and discloses a method for extracting vanadium from calcified vanadium extraction tailings through leaching, which comprises the following steps: S1, carrying out chute reselection on the calcified vanadium extraction tailings to obtain coarse-fraction chute reselection slag and fine-fraction chute reselection slag; s2, performing mechanical activation on ammonium bicarbonate, mixing the coarse-fraction chute reselection slag with ammonium bicarbonate, adding hot water, performing bubbling and stirring reaction, and performing solid-liquid separation to obtain desulfurized slag; and S3, dilute nitric acid, calcium fluoride and hydrogen peroxide are added into the desulfurization residues, a reaction is conducted at the temperature of 70-75 DEG C, and secondary leaching tailings and a vanadium-containing solution are obtained through solid-liquid separation. According to the method, the reselection technology is adopted, 90% or above of calcium sulfate can be directly removed, vanadium can be directly extracted through leaching by adding simple chemical reagents, complex processes such as drying, roasting and re-leaching are not needed, the production cost can be greatly reduced, environmental pollution is reduced, the vanadium leaching rate is larger than 65%, and ammonium sulfate can be recycled in the process for follow-up vanadium precipitation.

The invention relates to a method for extracting tungsten and molybdenum from low-grade tungsten-molybdenum ore, belongs to the technical field of non-ferrous metal hydrometallurgy, and solves the problems of harsh conditions, low extraction efficiency, high cost and environmental pollution when tungsten and molybdenum are extracted from low-grade tungsten-molybdenum ore in the prior art. The method comprises the following steps: leaching the low-grade tungsten-molybdenum ore by adopting sulfuric acid, and carrying out solid-liquid separation to obtain a leaching solution and leaching residues; extracting molybdenum from the leachate by adopting a cationic extraction agent to obtain tungsten-containing molybdenum extraction raffinate and a negative molybdenum organic phase; and extracting tungsten from the tungsten-containing molybdenum extraction raffinate by adopting a neutral extraction agent to obtain tungsten extraction raffinate and a negative tungsten organic phase. The method is carried out at normal temperature and normal pressure, the complexing characteristic of molybdenum to tungsten in the low-grade tungsten-molybdenum mixed ore under the acidic condition is ingeniously utilized, synergistic leaching of tungsten and molybdenum is achieved, the tungsten and molybdenum extraction efficiency is high, operation is easy and convenient, complexing agents such as phosphoric acid do not need to be added, and the leaching cost is greatly reduced; and the method is clean and environment-friendly, and development and utilization of low-grade tungsten-molybdenum ore are promoted.

A short-flow nickel-cobalt-manganese co-extraction process for laterite nickel ore hydro metallurgy falls within the technical field of hydrometallurgy. The process includes the following steps: co-extracting an iron-aluminum removal leaching solution of the laterite nickel ore by using an organic acid extraction system to obtain an enriched nickel-cobalt-manganese solution; extracting impurities from the enriched nickel-cobalt-manganese solution by using a P204 extraction system to obtain a high-purity nickel-cobalt-manganese solution. The co-extraction process of the disclosure simplifies the current hydrometallurgical process flow for extracting nickel-cobalt-manganese from the laterite nickel ore, greatly reduces the acid, alkali, and extractant usage, energy consumption, and water consumption in the extraction process, and reduces the cost of nickel-cobalt-manganese extraction, which is of great significance for the industrial production of ternary nickel-cobalt-manganese raw materials. At the same time, the process of the disclosure can achieve the co-extraction of nickel-cobalt-manganese, with high-purity of nickel-cobalt-manganese and low loss of nickel-cobalt, and the obtained high-purity nickel-cobalt-manganese solution is adjusted according to the proportion of nickel-cobalt-manganese metal in the ternary precursor product, and is finally used for preparing a nickel-cobalt-manganese ternary cathode material.

The invention discloses an MHP short-process nickel-cobalt-manganese purification liquid preparation technology, and belongs to the technical field of hydrometallurgy. Comprising the following steps: drying a cobalt nickel hydroxide raw material; carrying out size mixing, reduction leaching and separation to obtain a primarily purified nickel-cobalt-manganese solution and manganese-containing slag; carrying out acidification leaching on the manganese-containing slag, and separating to obtain manganese-silicon slag and a nickel-containing pickling solution; adding a neutralizing agent into the primarily purified nickel-cobalt-manganese solution to adjust the pH value, adding an oxidizing agent, and separating to obtain filtrate and filter residues; concentrated sulfuric acid is added into the filter residues for curing and leaching, and cured leaching residues and desiliconized filtrate are obtained through separation; cured leaching residues are returned for reduction leaching; adding a second neutralizer into the desiliconized filtrate to adjust the pH value, reacting, and separating to obtain iron-aluminum slag and nickel-containing impurity-removed filtrate; adding a third neutralizer into the nickel-containing impurity-removed filtrate to adjust the pH and precipitate nickel, and separating to obtain a nickel-containing alkaline substance; and removing impurities in the filtrate to obtain the nickel-cobalt-manganese purified liquid. According to the method, the nickel-cobalt-manganese purified liquid, the scandium-containing iron-aluminum slag, the by-product manganese-silicon slag and the like can be obtained, solid waste reduction and high value are achieved, and the method is more economical, more efficient and more environmentally friendly.

The invention discloses a method for separating impurity arsenic in the process of treating high-arsenic indium-containing zinc oxide smoke dust by a wet process, which comprises the following steps: when pyrogenic smelting and fuming volatilization treatment are carried out on jarosite slag and high-acid leaching slag produced by zinc hydrometallurgy, controlling the air leakage of a waste heat boiler to oxidize arsenic in the smoke dust into pentavalent arsenic; high-arsenic indium-containing zinc oxide smoke dust obtained through dust collection is treated in a two-stage leaching mode; the arsenic content of the first-stage leaching solution is controlled to be 0.5-1.0 g / L, the pH value of the second-stage leaching solution is controlled to be 1.6-1.8, the indium content in the first-stage leaching solution and the indium content in the second-stage leaching solution are both smaller than 5 mg / L, indium loss is effectively prevented, and second-stage leaching residues serve as lead and indium enrichment to subsequently recover valuable components lead and indium; adding a ferric sulfate solution into the second-section leachate to quickly generate ferric arsenate precipitate, combining the filtered filtrate with the first-section leachate, further deeply purifying to remove arsenic until the arsenic content is less than 1.0 mg / L, subsequently purifying to remove fluorine and chlorine, and electrolyzing to produce metal zinc.

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 discloses a device and a method for recycling gold ions in copper ammonia thiosulfate leachate, and belongs to the technical field of hydrometallurgy and precious metal recycling. An anode chamber and a cathode chamber which are physically and spatially isolated are built, so that the reduction reaction of the gold ions is only carried out in the cathode chamber, and only the oxidation reaction of metal zinc is carried out in the anode chamber. In order to avoid deposition of copper ions in the gold ion reduction process, before gold deposition, the existence form of the copper ions is regulated and controlled, Cu (NH3) 4 < 2 + > in a solution is converted into Cu (S2O3) 35 <-> which is difficult to deposit, then gold deposition is carried out, and after gold deposition is completed, the Cu (S2O3) 35 <-> in the solution is recovered to Cu (NH3) 4 < 2 + > by means of regulation and control of an electrochemical method. And the solution after gold ion deposition can be returned to the leaching stage for recycling under the condition that the copper ion concentration is not interfered.

The invention belongs to the field of mineral metallurgy, and particularly relates to a method for treating easily-argillization wrapped uranium-containing raw rubber sulfur-molybdenum ore, which comprises the following steps: carrying out coarse crushing and fine crushing on the easily-argillization wrapped uranium-containing raw rubber sulfur-molybdenum ore, then carrying out first-stage grading to obtain first-stage fine silt and a first-stage material, carrying out coarse grinding treatment on the first-stage material, and then carrying out second-stage grading to obtain second-stage fine silt; performing fine grinding treatment on the second-section material to obtain a fine grinding material; the first-stage fine silt, the second-stage fine silt and the fine grinding material obtained in the step (1) are placed in alkali liquor, pressurization and positive-pressure alkaline leaching treatment are conducted by adopting an oxygen-containing atmosphere, the alkali liquor is an aqueous solution of alkali metal element hydroxide, the pH value of the positive-pressure alkaline leaching stage is controlled to be 10 or above, then solid-liquid separation is conducted, and molybdenum-rich leaching liquor and uranium-rich leaching residues are obtained; and the uranium-rich leaching residues obtained in the step (2) are subjected to acid leaching treatment, and uranium-rich leaching liquid is obtained. According to the method, efficient extraction of molybdenum and uranium can be achieved, and in addition, high-selectivity separation of molybdenum and uranium can be synchronously achieved.

The invention discloses a method for cascade recovery of tellurium from a complex tellurium-containing material. The method comprises the steps of acid pickling, reduction neutralization, pyrogenic transformation, leaching and neutralization. According to the method, through cooperative treatment of a wet process and a pyrogenic process, the problem of slag phase wrapping is effectively solved, and tellurium with different valence states in a complex tellurium-containing material is converted into high-quality tellurium neutralization slag in a gradient mode. The selenium removal rate is not lower than 95%, the tellurium recovery rate reaches up to 90% or above, efficient separation of selenium and tellurium is achieved, and the produced tellurium dioxide neutralization slag can be used for further purification and refining.

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 discloses a method for treating copper cobalt oxide ore, and belongs to the technical field of non-ferrous metal hydrometallurgy. The method comprises the following steps: carrying out critical leaching on the copper-cobalt oxide ore to obtain a leaching solution and leaching residues, returning the leaching residues to a wastewater and waste residue neutralization process, carrying out a sulfuration sectional copper-cobalt deposition process on the leaching solution to obtain two products of copper sulfide and cobalt sulfide, carrying out targeted adsorption cobalt recovery on the produced sulfurized solution, returning the desorbed solution to a critical leaching process, and carrying out secondary leaching on the desorbed solution. After adsorption, liquid enters a waste water and waste residue neutralization process, produced neutralization residues are piled up, and produced neutralization water is returned to a critical leaching process. The method sequentially comprises the key procedures of critical leaching, vulcanization segmented copper and cobalt deposition, targeted adsorption and waste water and waste residue neutralization. The process adopted by the invention has the advantages of short process flow, high recovery rate, zero discharge of wastewater and the like. Compared with a traditional process, the copper and cobalt leaching rates can reach 90% or above, and the cobalt recovery rate can be increased by 10% or above.

The invention relates to a method for recycling battery-grade nickel sulfate from nickel-containing industrial waste, and belongs to the technical field of nonferrous metallurgy. The method comprises the steps that the nickel-containing industrial waste is subjected to water leaching treatment, and nickel-containing leachate is obtained; carrying out gradient pH regulation and control on the nickel-containing leaching solution by adopting calcium carbonate to obtain a purified solution; carrying out first countercurrent extraction on the purified liquid by adopting an organic phase I with the D2EHPA concentration of 0.1-0.3 mol / L; carrying out second counter-current extraction on the raffinate I obtained in the step (3) by adopting an organic phase II with the CYANEX 272 concentration of 0.05-0.2 mol / L; the raffinate II obtained in the step (4) is subjected to adsorption and oil removal through activated carbon and then is subjected to evaporative crystallization, and nickel sulfate crystals and crystallization mother liquor are obtained. The method is high in nickel recovery rate, the purity of nickel sulfate is larger than or equal to 99.9%, and the sodium content is low.

The invention belongs to the field of metallurgy, and particularly relates to a method for comprehensively recovering iron, vanadium, titanium, scandium and gallium through cooperation of vanadium titano-magnetite and red mud, which comprises the following steps: a) mixing vanadium titano-magnetite concentrate powder and red mud powder, roasting, leaching in water, and carrying out solid-liquid separation to obtain leached residues and leached liquid; b) mixing the leachate with a precipitant to precipitate vanadium, and carrying out solid-liquid separation to obtain vanadium-rich slag and vanadium-precipitated clear liquid; dissolving the vanadium-rich slag in a sulfuric acid solution, mixing the vanadium-rich slag with ammonium salt to react, carrying out solid-liquid separation, and roasting the obtained solid product ammonium polyvanadate to obtain V2O5; resin is used for adsorbing and desorbing gallium ions in the vanadium precipitation clear liquid, the pH of desorption liquid is adjusted to be alkaline, then electrolysis is conducted, and crude gallium is obtained; c) washing and drying the leaching residues to prepare pellets; after the pellets are pre-reduced, a carbonaceous reducing agent is mixed, melt separation treatment is carried out, and scandium-containing high-titanium slag and molten iron are obtained; and Ti and Sc in the scandium-containing high titanium slag are recycled. The method has the advantages of simple process, cleanness, high efficiency and the like.

The invention discloses a method for recovering Mo and Fe from direct coal liquefaction oil residues, and belongs to the technical field of hydrometallurgy. The method comprises the steps of solvent extraction, roasting enrichment, wet leaching, extracting agent extraction, ammonia water reverse extraction and evaporative crystallization, and ammonium molybdate and Fe (OH) 3 are obtained. Wherein in the wet leaching process, a leaching aid and sulfuric acid are jointly used for leaching, so that Ca and Si in the oil residues are left in leaching residues, and Mo, Fe, Al and the like enter a solution. The method comprises the following steps: simultaneously extracting Mo and Fe from a solution by using an extracting agent, precipitating Fe in a Fe (OH) 3 state by using an ammonia water reverse extraction method, leaving Mo in a reverse extraction solution in the form of ammonium molybdate, and further evaporating and crystallizing the reverse extraction solution to obtain the ammonium molybdate. According to the method, two valuable metals Mo and Fe in the direct coal liquefaction oil residue can be effectively recovered, and resource recycling is facilitated.

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 relates to the technical field of metallurgy, in particular to a method for extracting lithium through microwave acidification roasting and mechanical force ball milling leaching. According to the method for extracting lithium through microwave acidification roasting and mechanical force ball-milling leaching, microwave energy can be used for assisting calcination transformation of spodumene, and microwave energy is used for roasting an acid leaching material, so that the calcination effect is rapidly and efficiently achieved, and the use amount of sulfuric acid and calcination energy consumption are reduced. And a planetary ball mill is used for performing mechanical ball milling and water leaching on the caked roasted material after acid leaching and calcination, so that the water leaching efficiency is improved, and the lithium extraction rate is improved.

A method for comprehensive treatment of high-iron and low-silicon red mud through alkali magnetization roasting belongs to the technical field of metallurgy and comprises the following steps: (1) mixing the high-iron and low-silicon red mud, liquid caustic soda and a solid reducing agent, and granulating to obtain raw material pellets; (2) the raw material pellets are dried through kiln tail gas to remove adsorbed water and part of crystal water, and dried pellets are obtained; (3) the dried pellets are subjected to reduction roasting in an inert protective gas atmosphere in a dry roasting mode, and clinker pellets are obtained; and (4) the clinker pellets and a dilute alkali solution are subjected to wet grinding leaching and the like. According to the method, the high-iron and low-silicon red mud is supplemented with liquid caustic soda and solid reducing agents such as coal or sawdust organic matter and roasted, directional regulation and control of a red mud mineral phase are achieved, iron and aluminum resources are recycled in the form of magnetite and sodium aluminate, and the using amount of the reducing agents and the reaction temperature are remarkably reduced.

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 belongs to the technical field of pyrometallurgy and hydrometallurgy, and discloses an efficient leaching method for Joule thermal shock strengthened vanadium titano-magnetite. The Joule thermal shock strengthened vanadium-titanium resource efficient leaching comprises the steps that low-grade vanadium-titanium magnetite ore powder and a carbon source are mixed and then subjected to Joule thermal shock activation treatment, and an obtained activation product is leached through dilute acid or organic acid, so that valuable metal such as vanadium, titanium and iron can be efficiently leached out. Vanadium titano-magnetite and a small amount of carbon powder are subjected to Joule thermal shock, so that the valence state of metal ions is reduced, and the leaching activity of metal is improved. The Joule thermal shock strengthening low-grade vanadium titano-magnetite acid leaching method has the advantages of being high in activation efficiency, high in metal element leaching efficiency and the like.

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 provides a leaching solution and method for uranium ore acid leaching, and particularly relates to the technical field of hydrometallurgy, and the leaching solution comprises an acid compound, an oxidizing agent, a fluorine salt compound and water. And leaching the uranium ore by adopting the leaching solution. During acid leaching, an oxidizing agent provides high oxidation potential to oxidize tetravalent uranium ores into hexavalent uranium ores, and hexavalent uranium ions and sulfate radicals are complexed and dissolved out; the fluorine ions react with S to release tetravalent uranium, the contact probability of the tetravalent uranium and the oxide is increased, the uranium leaching effect is enhanced, and the leaching rate is remarkably improved compared with an existing acid leaching method.