296 results about "Leaching rate" patented technology

The invention relates to the technical field of rare earth ore concentrate treatment, in particular to a rare earth ore concentrate treatment method. The treatment method of the rare earth concentrate comprises the following steps that the rare earth concentrate, a calcium-containing compound, silicon dioxide and carbon powder are mixed and roasted, and roasted ore is obtained; water is added into the roasted ore for size mixing, and size is obtained; and acid is added into the slurry for reaction, solid-liquid separation is carried out, and acid leaching residues and rare earth chloride feed liquid are obtained. The method has the advantages of being simple in technological process, high in rare earth recovery rate, short in reaction time, environmentally friendly, low in cost and diversified in rare earth grade applicability. The silicon dioxide can increase the decomposition activity of bastnaesite and monazite in the rare earth ore, rare earth compounds easy to leach can be generated, and therefore the decomposition rate of the rare earth ore concentrate is increased, and calcium can also play a role in fixing fluorine. According to the method, the rare earth decomposition rate is 98% or above, and the rare earth leaching rate is 96% or above.

The invention discloses a method for extracting tantalum and niobium by roasting and melting tantalum and niobium concentrate through villiaumite after multiple times of acid leaching, which comprises the following steps: fully grinding the tantalum and niobium concentrate through a grinding machine, sieving, and fully mixing with concentrated acid according to a certain mass ratio for first acid leaching; filtering the mixed solution, and washing with pure water; mixing the filter residues with concentrated acid according to a certain mass ratio, carrying out secondary acid leaching, filtering, and washing the filter residues with pure water; drying the filter residue, and fully mixing with villiaumite according to a certain mass ratio; fully grinding the mixed solid roasting material by using a grinding machine; roasting and melting the materials; and leaching the roasted material with water or dilute acid, filtering after leaching is completed, and collecting filtrate. According to the method, most impurity ions can be effectively removed through secondary acid leaching impurity removal in the leaching process. And the fluorine salt roasting cost is low, the tantalum-niobium leaching effect is good, the tantalum-niobium leaching rate can reach 90% or above, and the comprehensive utilization rate of resources is high.

The invention discloses a method for efficiently leaching waste aluminum electrolyte and recovering fluorine, lithium, aluminum and sodium, belongs to the field of solid waste resource recovery, and solves the following problems of low aluminum and lithium leaching rate in an alkaline process and HF pollution in an acid process. The method comprises the following steps: crushing, grinding and screening waste aluminum electrolyte blocks to obtain waste aluminum electrolyte powder A; uniformly mixing the waste aluminum electrolyte powder A with a calcium-containing reaction auxiliary material to obtain a material B; adding the material B into an alkali solution, and carrying out a leaching reaction; separating the materials to obtain filter residues and filtrate; carrying out acid pickling purification and impurity removal on filter residues, and filtering; extracting the filtrate to obtain a loaded organic phase and raffinate; carrying out reverse extraction on the loaded organic phase; adding reaction auxiliary materials into the raffinate, uniformly stirring, reacting, standing, filtering and separating; continuously supplementing reaction auxiliary materials into the filtrate, uniformly stirring, standing, filtering and separating. According to the method, multiple components in the waste aluminum electrolyte can be efficiently recycled, and the comprehensive utilization rate is high.

The invention belongs to the technical field of deep sea manganese nodule treatment, and particularly relates to a method for microwave treatment of manganese nodules. When manganese nodules are treated in the prior art, the defects that an additional reducing agent needs to be added, a large amount of by-product gas polluting the environment exists in products, the reaction rate is low, the treatment time is long, energy consumption is high, pollution is large, and the separation efficiency of gangue components in minerals is low exist. In order to solve the problems, the method for microwave treatment of the manganese nodule comprises the following steps of microwave preheating activation, ore grinding premixing, microwave reduction acid leaching, sulfuration precipitation, microwave sulfuration smelting, oxygen-enriched blowing, microwave roasting oxygen pressure leaching, multi-stage extraction and microwave treatment. And the structure of the manganese-containing aggregate in the raw ore is destroyed, and gas-phase components in the raw ore overflow, so that the leaching rate and the recovery rate of valuable metals are greatly improved.

The invention discloses a large-scale double-impeller leaching stirring tank, and relates to the technical field of gold ore leaching stirring tanks, the large-scale double-impeller leaching stirring tank comprises a transmission part, a bridge part, a stirring part and a tank body part, the transmission part comprises a motor, a high-speed coupler, a speed reducer, a low-speed coupler, a rack and a bearing support; the bearing support comprises a main shaft, a bearing body, a thrust bearing, an upper self-aligning roller bearing, an upper gland, a lower self-aligning roller bearing, a lower gland and a half coupling; the stirring part comprises an upper end shaft, a lower end shaft, an upper hub, a lower hub and blades; a shaft end fixing device is arranged in the center of the bottom of the tank body part; an inflating device is arranged at the lower part of the tank body. The device is used for gold ore pulp leaching operation, the treatment capacity is large, ore flow movement is stable, ore pulp mixing is uniform, air enters the ore pulp through a special inflation device, the ventilation capacity is large, the structure is simple, air dispersion is uniform through blade stirring, and the leaching rate can be effectively improved.

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 belongs to the technical field of hydrometallurgy, and particularly relates to a pretreatment method for enhancing peroxide to improve the leaching 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; an oxidizing agent is added into the ore pulp, oxidation pretreatment is conducted on the high-sulfur-arsenic gold ore under the catalytic action of ultraviolet light, and ore pulp activation liquid is formed; and the pH of the ore pulp activating solution is adjusted to 9-12, a gold leaching agent is added into the ore pulp complexing solution, and stirring gold leaching treatment is conducted. According to the method, efficient oxidation of sulfide and arsenide is achieved under the mild condition through the synergistic effect of photocatalysis and chemical oxidation, the leaching rate of gold is remarkably increased, compared with a conventional peroxide oxidation method for pretreatment, the leaching rate can be increased by 10%-35%, and meanwhile the agent use amount and environmental pollution are reduced.

The invention provides a method and equipment for leaching and recycling an aluminum electrolysis waste carbon cathode. The method relates to the field of solid waste treatment, and comprises the following steps: S1, crushing the recycled waste aluminum electrolysis waste carbon cathode by using a jaw crusher, further finely grinding to a certain mesh number by using a vibration mill, and drying for later use; s2, the ground waste carbon cathode is weighed, a certain amount of water is added, the mixture is placed in an ultrasonic instrument at the normal temperature to react for a period of time, and washing residues and washing liquid are obtained through filtering; s3, a sodium hydroxide solution with a certain concentration is added into the washing residues to be mixed, and the mixture is placed in an ultrasonic instrument to react for a period of time at a certain temperature. Compared with a traditional leaching method, the method has the advantages of being high in efficiency and good in effect, the leaching rate of valuable substances is greatly increased, and the valuable substances are recycled through a series of steps such as washing, alkaline leaching, acid leaching and recycling. The method realizes efficient recovery of useful components in the waste carbon cathode, does not produce solid waste and wastewater in the process, is environment-friendly, and realizes effective utilization of resources and harmless treatment of dangerous solid wastes.

The invention relates to an efficient copper removal and recycling process for copper-cyanogen complex wastewater, which comprises the following steps: (1) critical acidification-selective crystallization of the copper-cyanogen complex wastewater: directionally recombining a copper-cyanogen complex to generate insoluble CuCN crystals by accurately regulating and controlling the pH value of the wastewater; (2) rotational flow enhanced crystallization: separating CuCN crystals from overflow liquid through a hydrocyclone; (3) gradient activation of a composite vulcanizing agent for deep copper removal: enabling the fine CuCN particles and the dissolved-state low-coordination copper-cyanogen complex to react to generate insoluble CuS crystals by adjusting the pH value and adding the composite vulcanizing agent; and (4) magnetic seed enhanced separation: carrying out magnetic separation by adopting modified magnetic seeds and a low-intensity magnetic separator, separating CuS magnetic flocs from the wastewater, and finally obtaining purified tail liquid. According to the closed-loop process, copper in the copper-cyanogen complex wastewater can be efficiently removed and recovered, the purified tail liquid can be reused for cyanidation leaching operation, the unit consumption of sodium cyanide is remarkably reduced, the leaching rate of gold and silver is increased, and zero discharge of wastewater and full recovery of copper resources are truly achieved.

A curing roasting-water leaching-normal pressure acid leaching treatment method for a lateritic nickel ore, relating to the technical field of metal smelting. The treatment method comprises the following steps: uniformly mixing lateritic nickel ore dry powder, concentrated sulfuric acid and sodium fluoride, and then carrying out curing roasting in a reducing atmosphere to obtain a cured material; carrying out water leaching on the cured material, and filtering to obtain a water leaching solution and water leaching residues; and carrying out normal-pressure acid leaching on the water leaching residues, and filtering to obtain an acid leaching solution and acid leaching residues. The treatment method has the characteristics of controllable reaction, short reaction period, low reaction energy consumption and relatively low production cost; and compared with a conventional high-pressure acid leaching treatment process, the treatment method can significantly reduce the acid consumption, reduce the loss of valuable metals such as cobalt and nickel, increase the metal recovery rate and improve the economic benefit of production. The treatment method can reduce the corrosion of a strong oxidant to equipment, reduce the emission of a waste liquid in the leaching process and reduce the production cost while effectively guaranteeing the cobalt-nickel leaching rate.

The invention discloses a method for preparing a NaFeO2 material and leaching copper, zinc and molybdenum from copper slag, and relates to the technical field of metallurgical solid waste resource utilization. The method comprises the following steps: grinding the copper slag, mixing the ground copper slag with a sodium salt, roasting the mixture in a muffle furnace at a proper temperature, and finally carrying out ultrasonic washing and filtering on the roasted product to obtain filter residues and filtrate; and drying filter residues to obtain a high-purity NaFeO2 material, and recovering valuable metals such as copper, zinc and molybdenum from filtrate. In the washing process, valuable metal elements copper, zinc and molybdenum in the copper slag are efficiently leached into the solution, the leaching rate reaches 96% or above, and synchronous recovery of the valuable elements is achieved; according to the method, the industrial waste residue copper slag is successfully converted into the NaFeO2 product with the high additional value, meanwhile, valuable metal is efficiently extracted, the method has the advantages of being simple in process, low in cost, high in recycling degree and environmentally friendly, a new way is opened up for high-value utilization of the copper slag, and the method has good industrial application prospects.

The present invention relates to a method for decomposing and utilizing phosphate-potassium ore, belonging to the technical field of phosphate-potassium ore treatment. The technical problem solved by the present invention is to provide a method for decomposing and utilizing phosphate-potassium ore. The method comprises the following steps: mixing nitric acid and phosphate-potassium ore, and carrying out an acidolysis reaction; after the reaction is completed, performing solid-liquid separation to obtain a phosphorus-containing filtrate and potassium-containing acid-insoluble substances; wherein, the leaching rate of potassium in the phosphate-potassium ore is ≤3%, and the leaching rate of phosphorus is ≥96%. The present invention for the first time uses nitric acid to treat phosphate-potassium ore, controls the reaction conditions of the acidolysis process to reduce the leaching rate of K element, realizes the separation of phosphorus and potassium elements, avoids the problem that potassium fluorosilicate precipitates and clogs the filter cloth during vacuum filtration and cooling, perfectly avoids the disadvantages of the traditional wet-process phosphoric acid for treating phosphate-potassium ore, and has rich products.

The present invention provides a remediation composition for soil contaminated with hexavalent chromium and a soil remediation method. The composition comprises catechin, flavonoid isorhamnetin and humic acid with a mass ratio of 1:1 - 3:0.1 - 1. The remediation composition for soil contaminated with hexavalent chromium according to the present invention can achieve a leaching rate of 93% for the hexavalent chromium contamination in the soil. At the same time, the composition can reduce more than 95% of the hexavalent chromium in the leaching solution to trivalent chromium with low toxicity, achieving the purpose of completely removing hexavalent chromium from the soil and greatly reducing the material cost of chemical leaching.

The invention relates to a method for curing harmful components in hazardous wastes, which comprises the following steps: uniformly mixing high-silicon iron tailings and blast furnace fly ash, adding the mixed material into chromium-containing waste liquid, stirring, carrying out plate-frame pressure filtration, carrying out pressure filtration again to obtain a mixed material, cutting the mixed material into blocks, drying the cut mixed material, and roasting after treatment to obtain a roasted product; carrying out rapid water cooling on the roasted product, and grinding after water cooling; and performing magnetic separation on the grinding product to obtain iron ore concentrate containing ferrochrome spinel and low-chromium tailings. According to the method, solid waste high-silicon iron tailings and blast furnace fly ash generated by iron and steel enterprises are used as curing agents, curing of heavy metal chromium in the chromium-containing sludge is achieved, the leaching rate of hexavalent chromium and total chromium in the obtained product is far lower than the standard limit value, harmless treatment of the chromium-containing sludge can be achieved, and the method is suitable for industrial production. The obtained ferrochrome spinel can be recovered through magnetic separation, and the generated low-chromium tailings can be directly subjected to landfill treatment or used as building materials.

A preparation method of an ionic rare earth leaching agent includes the following steps: (1) domestication microorganisms with rare earth activated mineral powder culture medium to obtain a microbial suspension; (2) amplifying and culturing the microbial suspension and additives to obtain the amplified culture medium; and (3) mixing the modified sesbania gum with the amplified culture medium to obtain the ionic rare earth leaching agent. The activated mineral powder is the active metal-containing mineral powder in nature, which has excellent cation exchange function after activation, and the activated mineral powder and ionic rare earth mineral powder are used as the medium components to domesticate microorganisms, so that microorganisms can survive in the above-mentioned ionic solution and improve the leaching rate of synergistic leaching ionic rare earth.

The invention discloses a method for enhancing biological leaching of copper in a waste circuit board by utilizing magnetite. The method comprises the following steps: adding the pre-crushed waste circuit board and magnetite into a 9K culture medium with the pH value of 1.8-2.0 according to a certain mass ratio, inoculating Acidithiobacillus ferrooxidans as a leaching strain, and carrying out a leaching reaction under a constant-temperature oscillation condition. The magnetite is added, so that the leaching of copper in the circuit board is remarkably enhanced, the leaching rate is remarkably improved, and the leaching period is shortened. And compared with the microbiological leaching result without magnetite, the copper leaching rate is improved by 12-32%. By utilizing the difference between the circuit board and the magnetite in particle size, the magnetite can be recycled from the leaching residues through a physical separation means for a new round of leaching. The method is simple in process, the strain is easy to culture, and the method has good environmental friendliness and is suitable for green and efficient recovery of copper in the waste circuit board.

The invention discloses a method and a system for improving heap leaching efficiency of metal ore by using micro-nano bubbles, which comprise the following steps: a) generating the micro-nano bubbles: installing a micro-reactor on a leachate conveying pipeline, introducing oxygen or air, and enabling the leachate to pass through the micro-reactor under a certain pressure to generate a leachate containing the micro-nano bubbles; b) conveying the gas-containing leachate: conveying the leachate containing the micro-nano bubbles to an ore dump leaching area, and enabling the leachate to be in full contact with the ore in the dump leaching process; and c) reinforcement of the dump leaching process: promoting leachate to permeate into fine gaps of ore particles by utilizing high permeability and high mass transfer characteristics of the micro-nano bubbles, enhancing the oxidation reaction and improving the leaching rate of metal. According to the method, the metal leaching rate is remarkably increased, the leaching time is shortened, the agent consumption is reduced, and remarkable economic benefits and environmental benefits are achieved.

The invention provides a method for preparing a poly-aluminum and functional silicon material by activating coal gasification slag and waste hydrochloric acid through microwave synergistic mechanical force, and belongs to the technical field of industrial solid waste recycling. The method comprises the following steps that the coal gasification slag is sequentially subjected to microwave radiation treatment and ball milling, activated slag and waste hydrochloric acid are subjected to an acid leaching reaction, and aluminum-iron-containing leachate and silicon-rich slag are obtained; extracting the aluminum-iron-containing leaching solution to obtain an iron-rich organic phase and a purified aluminum chloride solution; performing thermal polymerization reaction on the purified aluminum chloride solution to obtain polyaluminum chloride; the method comprises the following steps: carrying out alkaline leaching reaction on silicon-rich slag and waste alkali liquor, adding a structure-directing agent into a sodium silicate solution, and sequentially carrying out aging, solution pH value adjustment and crystallization precipitation to obtain mesoporous silica. According to the method, the aluminum-silicon leaching rate is remarkably increased through microwave-mechanical force synergistic activation, synergistic and efficient treatment of the three kinds of waste including the coal gasification slag, the waste hydrochloric acid and the waste alkali liquid is achieved, the technological process is closed, the product additional value is high, and the environmental and economic benefits are remarkable.

Disclosed in the present invention is a method for continuously leaching an ionic rare earth ore. The method comprises: putting an ionic rare earth ore and a leaching agent solution to a multi-stage leaching reactor for co-current leaching, and carrying out solid-liquid separation to obtain a rare earth leachate and leached tailings; putting the leached tailings and clear water into a multi-stage elution reactor for co-current elution, and carrying out classification and solid-liquid separation to respectively obtain coarse-sized tailings, medium-sized tailings, fine-sized tailings, and an eluate; and enriching the rare earth leachate and / or the eluate, and then circulating same to prepare the leaching agent solution, wherein the rare earth leachate flows back to the multi-stage leaching reactor, and the eluate flows back to the multi-stage elution reactor. By means of the continuous multi-stage co-current leaching with the leaching agent solution and the backflow of the rare earth leachate for leaching, and the continuous multi-stage co-current elution with clear water and the backflow of the eluate for elution, the rare earth leaching rate and the rare earth concentration in the leachate are effectively improved, the consumption of the leaching agent is greatly reduced, the ore leaching period is significantly shortened, and full-process water balance and tailing classification and comprehensive utilization are achieved.

The invention discloses a system and method for improving the leaching rate of low-grade scheelite, and relates to the technical field of mineral recycling. S2, pulping; s2, pulping; s4, crushing and activating by a vertical mill; s5, pressure cooking and leaching; s6, carrying out primary solid-liquid separation; s7, enrichment is carried out; and S8, carrying out secondary solid-liquid separation. According to the technical scheme of cooperation of the rotational flow and the vertical mill in the system, heavy and light phases are separated, the efficiency of the vertical mill is improved, the activation energy of ore pulp obtained after ore grinding is increased, the leaching reaction is facilitated, the yield of the whole process is improved, valuable metal enrichment of low-grade raw ore can be achieved, consumption of raw and auxiliary materials is low, multiple times of solid-liquid separation and enrichment are achieved, and the comprehensive utilization rate of the raw ore is improved. Enriched mineral powder and return water are returned to the front section for recycling, so that energy conservation and emission reduction are realized.

The invention discloses a method for leaching valuable elements in silicate rare earth ore, and belongs to the technical field of rare earth metallurgy. According to the method, the valuable elements in the rare earth concentrate are efficiently leached by adopting the processes of low-temperature sulfating intensified roasting, clinker hydrometallurgy, leached ore pulp flocculation and filter cake washing. The strengthened low-temperature sulfating roasting process avoids the problems of high energy consumption, serious equipment corrosion, low rare earth leaching rate and complex waste gas treatment (SO2 escape) of a traditional process, meanwhile, silicate rare earth ore decomposition is achieved, the effect of a back-end leaching process is remarkably improved, compared with an acid pickling process, the hydrometallurgy process reduces the acid consumption and the wastewater treatment difficulty, and the production cost is reduced. The leaching ore pulp flocculating settling process is beneficial for improving the industrial production efficiency, the filter cake washing process is beneficial for further improving the leaching rate of valuable elements, the silicate rare earth ore concentrate resources are utilized to the maximum extent on the premise of being environmentally friendly, and a technical path is provided for industrial utilization of silicate type rare earth ore.

The invention discloses a multi-stage oxygen pressure leaching process for coarse-grained zinc sulfide concentrate, and belongs to the technical field of hydrometallurgy. The process comprises the following steps: carrying out first-stage high-temperature oxygen pressure leaching on 80-160-mesh coarse-grained zinc sulfide concentrate; the first-section leaching residues are subjected to flotation separation, and flotation concentrate and flotation tailings are obtained; and the flotation concentrate is finely ground and then subjected to second-stage low-temperature oxygen pressure leaching. Flotation operation is introduced between the first-stage oxygen pressure leaching and the second-stage oxygen pressure leaching, a large amount of gangue minerals and iron are effectively separated and opened, the amount of materials entering the second-stage leaching is remarkably reduced, and therefore the second-stage ore grinding load and leaching energy consumption are greatly reduced while the high leaching rate of zinc, indium, copper and the like is guaranteed, and the leaching efficiency is improved. And efficient, energy-saving and stable treatment of the coarse-grained zinc sulfide concentrate in a zinc hydrometallurgy system is realized.

The invention provides a method for treating clay type lithium ore through multi-composite-field medium-low-temperature roasting and continuous water leaching, and belongs to the technical field of mineral processing. According to the method, multi-field roasting and continuous leaching processes are adopted for treatment, a microwave-suspension composite roasting device is adopted for multi-field roasting, and a plurality of continuous leaching devices are adopted for continuous leaching. The method provided by the invention has the advantages of simple process flow, high roasting efficiency and low energy consumption, and can effectively destroy mineral lattices of the clay type lithium ore; in addition, by means of the continuous leaching technological process, the lithium extraction rate is greatly increased, the lithium leaching rate is increased, the use amount of an acid leaching agent is reduced, sulfuric acid is recycled, the water demand is reduced, the problem of lithium resource shortage is solved, and a theoretical basis is provided for subsequent industrial production.

The invention provides a method for leaching germanium from germanium-containing coal ash, and belongs to the technical field of germanium separation. The method comprises the following steps: (1) mixing germanium-containing coal ash and an alkali solution in a first-stage reaction kettle for stirring reaction to obtain alkaline leaching ore pulp; (2) adding mixed acid into the alkaline leaching ore pulp, stirring, and carrying out mixed acid leaching on the alkaline leaching ore pulp in a secondary reaction kettle to obtain acid leaching ore pulp; and (3) carrying out liquid-solid separation on the acid leaching ore pulp to obtain slag of which the main component is silicon dioxide and leaching liquid rich in germanium. According to the method disclosed by the invention, an alkali fusion process is adjusted to be high-temperature alkali leaching, and then the alkali leaching ore pulp is directly subjected to mixed acid leaching, so that insoluble silicate and silicon dioxide are converted into silicate which is easily dissolved in mixed acid, and the technical problem of efficient leaching of germanium is solved. According to the method, the leaching rate of germanium is high, the technological process is simple, silicon in the leachate can be effectively controlled, and comprehensive recycling of resources is facilitated.

The application provides an amino acid composite reagent system and a method for treating electronic waste to prepare high-purity glycine copper, and belongs to the technical field of metal hydrometallurgy and resource recycling. The application builds an ammonia catalytic reduction mechanism by designing an amino acid composite reagent system, greatly improves the leaching rate, simultaneously inhibits the dual effects of copper hydroxide precipitation and glycine chelation, and realizes efficient solution of copper ions; through narrow window regulation technology of pH at 9.5±0.2, the stability of ammonia, the activity of glycine anion are maintained, and the selective leaching rate of copper is ensured; a directional crystallization process of leaching solution is constructed, the "self-assembly directional crystallization" process of glycine copper chelate is used, based on the saturation concentration of glycine copper in the leaching solution and the stable chelate structure, through three-stage crystallization precise regulation, the preparation of high-purity crystal is realized. The process realizes the closed-loop crystallization system of "zero addition of crystal seeds and zero wastewater discharge" of the copper-containing complex leaching solution of electronic waste.

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 invention relates to the technical field of solid waste recycling, and particularly provides a circulating fluidized bed system for gasification fly ash resourceful treatment and an aluminum oxide leaching method. The system comprises a hearth, a gas-solid heat exchange bed and an activation reactor. The gasified fly ash and a water glass binder are agglomerated and thickened through a fine powder agglomerator, incineration is conducted through a hearth, and ammonia gas is injected to fix heavy metal; the ash enters an activation reactor, a mullite structure is destroyed by utilizing residual carbon oxygen-enriched combustion (850-950 DEG C) of fly ash, aluminum ions are extracted through gradient acid leaching, acid leaching liquid is neutralized by ammonia water to precipitate aluminum hydroxide, and high-purity aluminum oxide (greater than 99%) and a byproduct ammonium chloride fertilizer are obtained through calcination; the escape rate of fine particles is lower than 10%, the leaching rate of aluminum oxide exceeds 85%, and the treatment cost is reduced by 50% or above compared with that of a traditional method.

The invention provides a method for roasting-leaching clay type lithium ore by replacing a roasting aid with biomass, and belongs to the technical field of ore dressing processes. According to the method, the plant ash generated after biomass combustion is used for replacing part of alkali-containing salt or alkali in the clay type lithium ore so as to achieve the purpose of alkali roasting-water leaching, the sintering condition of a roasting auxiliary and the clay type ore can be effectively reduced through addition of the plant ash, and bulk consumption of solid waste of the plant ash is achieved. The invention provides a mixed roasting-water leaching method of plant ash generated after biomass combustion and clay type lithium ore, so that the consumption of a roasting auxiliary agent is greatly reduced (the consumption of an alkaline agent is reduced by 50-80%), the phenomenon that the roasting auxiliary agent and the clay type ore are easy to sinter at high temperature is improved, clean and effective utilization of biomass is realized, and the method is suitable for industrial production. The lithium obtained through the method is high in leaching rate and low in cost.

The invention relates to the technical field of solid waste biological treatment, and discloses La and Ce toxicity resistant thiobacillus thiooxidans and application thereof, and the collection number of the thiobacillus thiooxidans is GDMCC No: 63522. The invention provides a novel thiobacillus thiooxidans, and the preservation number of the novel thiobacillus thiooxidans is GDMCC No: 63522. The strain can highly tolerate La and Ce, and can realize biological leaching of solid wastes rich in La or (and) Ce under high ore pulp density, so that more solid wastes can be treated in a single batch, the biological leaching rate is improved, and the strain has a good application prospect.

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.