422results about How to "Improve leaching rate" patented technology

The invention provides a leaching and recycling method for metals in anode waste materials of lithium-ion batteries. The leaching method comprises the steps that: the anode waste materials of the lithium-ion batteries react with organic acid solution containing a reducing agent; after reaction, solid-liquid separation is carried out and leaching solution and filter residues are obtained, so that the leaching of the metals in the anode waste materials of the lithium-ion batteries is realized. Based on the leaching method, the invention provides a recycling method for the anode waste materials of the lithium-ion batteries based on closed-loop circulation of metals. The leaching method for the metals in the anode waste materials of the lithium-ion batteries has the advantages of high metal leaching rate, short leaching time, low processing cost and wide application range; secondary pollution and complex process for separating and purifying various metals in the leaching solution are avoided; according to the recycling method for the metals in the anode waste materials of the lithium-ion batteries, the technological process is short and the closed-loop circulation of the metals is realized.

The invention belongs to the field of chromite hydrometallurgy and chromium chemical industry, and in particular relates to a method for the pollution-free production of sodium chromate by pressure leaching of chromite. The method comprises the following steps of: 1) reacting the chromite with oxidizing gas in solution of NaOH; 2) diluting the product obtained by the step 1) and making subcrystalline sodium chromate to fully enter a liquid phase; 3) performing solid-liquid separation on the solid-liquid mixed slurry obtained by the step 2); 4) adding calcium oxide into the obtained diluent for removing impurities; and 5) evaporating and crystallizing the obtained solution without the impurities to obtain a sodium chromate crystal and crystallization mother solution; after the solid-liquid separation, rinsing the sodium chromate crystal by using saturated solution of sodium chromate; and drying to obtain a qualified sodium chromate product. The method has the advantages of simple reaction system component, no difficultly separated phase introduced in the system, contribution to high-efficiency separation of the sodium chromate, great reduction in reaction temperature, low energy consumption, effective reduction in production cost of the sodium chromate, and high chromium leaching yield.

The invention opened a recovery method for the polymetallic bullion ore of high sulphur, carbon and arsenic. It solves the problem of extracting gold interfering by the sulphur and carbon. The chlorination extracting system is proper not only to sulfide mineral but also to the polymetallic accompanying mineral. Also it can recovery the accompanying metal less than 8h, so it has improved the extracting ratio. The process is easy to do and low cost.

A method for separating and recovering nickel, cobalt, magnesium, iron and silicon from nickel-bearing laterite is disclosed; nickel, cobalt, magnesium and iron therein are leached out by using high-temperature peracid, leachate is pre-neutralized via serpentine powder, after the pre-neutralization, the leachate is neutralized by magnesite powder for de-ironing, and the scum is delivered for ironmaking after being dewatered by smoke gases in a fluidized bed furnace for making sulfuric acid, the de-ironed clear nickel liquid uses magnesite powder to precipitate nickel carbonate, and the precipitated liquid is concentrated and crystallized to obtain magnesium sulfate heptahydrate. The leached slag mainly contains silicon and can be used for making white carbon black. The invention can sufficiently recover and utilize nickel, cobalt, magnesium, iron and silicon in the nickel-bearing laterite, and the invention is simple in technology, low in energy consumption and pollution-free on environment.

The invention relates to a method to pre-treat a hard-to-leach gold ores-pyrite by microwave roasting, which is characterized in that the gold ores-pyrite or fine gold ores-pyrite with the granularity being 200 meshes which takes 90% to 95% of the whole gold ores-pyrite is positioned in a reaction chamber of a microwave roasting oven, a nitrogen is filled fully into the reaction chamber, starting the microwave roasting oven, the gold ores-pyrite or fine gold ores-pyrite is radiated and roasted by the microwave in the nitrogen atmosphere, the roasting temperature is 450 to 580 degree centigrade, the power is 4 to 6kw, the microwave roasting oven stops working after roasting for 5 to 20 minutes, a roasted product is made when the roasting gold ore-pyrite is taken out. The method to pre-treat a hard-to-leach gold ores-pyrite by microwave roasting has the advantages of increasing the gold leaching yield of the hard-to-leach gold ores-pyrite up to over 90%, reaching purpose of the environment protection because the sulfur is precipitated as a free sulfur without the recovery process of smoke and dust, and saving the energy because the microwave roasting process is adopted and the pretreatment time is greatly shortened.

The invention discloses a method for microbiological leaching of uranium-molybdenum ore and enrichment and separation of uranium and molybdenum. The method comprises a microbiological leaching method of uranium-molybdenum ore and an enrichment and separation method of uranium and molybdenum in a leachate; in the leaching method, an oxidizing agent for leaching the uranium-molybdenum ore is biological high iron, namely an acidophilous acidithiobacillus ferrooxidans solution containing the biological high iron. The method comprises the following specific steps: firstly crushing the uranium-molybdenum ore so that the crushed materials with the granularity of above 200 meshes account for more than 50% of the total amount and the crushed materials with the granularity of 30 meshes account for not more than 10% of the total amount; then infiltrating the crushed uranium-molybdenum ore in a biological oxidizing agent solution, carrying out solid-liquid separation after infiltrating, and then carrying out ion exchange on the microbiological leachate of the uranium-molybdenum ore by using 201*7 resins, and carrying out iron elution, uranium elution and molybdenum elution. In the method, the uranium leaching rate is above 80%, the molybdenum leaching rate is within the range from 60% to 70% or above, and the molybdenum leaching rate is increased by 20-30%; the uranium, molybdenum and iron in the leachate are eluted by using a PH1.0 solution by virtue of an ion exchange column, and the removal rate of the iron is above 95%, the adsorption rate of the uranium and the molybdenum is not affected, the uranium and the molybdenum adsorbed on the resin are desorbed by using different desorption reagents step by step, and the recovery rate of the uranium and the molybdenum is above 80%.

The invention relates to a biologic oxidation-roasting-cyanide gold leaching process, which belongs to metallurgical technologies. The technology proposal combines the biologic oxidation technology and the low-temperature roasting technology; the biologic oxidation process is utilized to lead wrapped fine particle gold to be exposed and dissociated fully; then oxidation sludge is processed through low-temperature roasting to remove organic carbon in ores, thereby thoroughly solving the adsorption and preg-robbing problems in subsequent cyanidation operation, and preventing low melting point oxides from secondarily wrapping the gold; the organic combination of the two pretreatment processes provides advantages for the cyaniding leaching of the gold. The biologic oxidation-roasting-cyanide gold leaching process has the advantages that firstly, the leaching rate of the gold is increased to 95.82 percent compared with the conventional leaching rate that is 0.66 percent, so that the leaching rate of the gold is increased obviously; secondly, the environmental pollution is reduced greatly.

The invention discloses a method for quickly leaching gold and silver by using a mixed leaching agent, which comprises the following steps of: crushing gold-containing pyrite smelting slag, a sulfide-containing visible gold ore or/and a gold-containing oxidized ore serving as raw materials, conditioning the raw materials with water to form slurry, adding ammonium thiocyanate, thiocarbamide, urea and an oxidant, namely manganese dioxide or ferric chloride, into the ore slurry and stirring and leaching the mixed slurry to leach the gold and silver out. The method has the advantage that: the mixed leaching agent formed by adding the urea into the ammonium thiocyanate can quickly leach the gold and the silver out of the sulphur and arsen-containing gold ore by adding the urea with a low cost, particularly the gold and the silver which are contained in pyrolusite can be leached out with a lower cost. At the same time, beneficial elements in the ores can be comprehensively used.

The invention relates to a method for extracting niobium from tailings, belonging to the technical field of mineral extraction metallurgy. The method includes the steps as follows: (1) treating the tailings with a flotation method so as to float out iron and niobium minerals from the tailings; (2) using a microwave magnetizing-roasting method and adding carbonaceous reducing agent in the floated minerals so as to convert the haematite in the minerals into magnetite; (3) separating the magnetite out from the roasted minerals by adopting a low-intensity magnetic separation method, thus enriching the niobium minerals in the tailings subjected to magnetic separation; and (4) leaching the obtained niobium minerals out in a high-pressure kettle with concentrated acid so as to obtain niobium-containing extract. The method flow is short, flotation agent types are few and the flotation effect is good; the mineral roasting time is short, the consumption quantity of reducing agent is less and the cost is low; the content of hazardous elements such as S, P and the like in the magnetite obtained by low-intensity magnetic separation is low simultaneously when niobium is enriched, niobium is an excellent material for making iron with a blast furnace, and environment pollution caused by the tailings is solved to a large extent.

The invention relates to the field of non-ferrous metallurgy and resource recycling, in particular to a novel process for extracting vanadium from vanadium-containing waste catalyst reductive organic acid. The novel process comprise the steps that a vanadium-containing waste catalyst is directly extracted in a reductive organic acid system, and other reductive agents are not added, so that pentavalent or tetravalent vanadium is directly reduced into vanadium-oxygen-based ions or trivalent vanadium ions, the vanadium-oxygen-based ions or the trivalent vanadium ions are combined with organic acid radical anions and enter a solution, and vanadium-containing leaching liquid and vanadium-containing leaching slag are obtained; and ammonia water is added into the vanadium-containing leaching liquid to adjust pH so that ammonium vanadate can be formed and precipitated, and after separating is conducted, a vanadium pentoxide product is obtained by calcining precipitation slag. According to the novel process for extracting the vanadium from the vanadium-containing waste catalyst reductive organic acid, the vanadium is extracted by adopting the reductive organic acid system; the extracting condition is mild; the vanadium extracting rate is 95% or above and higher than the direct inorganic acid fluid extracting rate; and other impurity ions are not introduced in the extracting process, so that recycling of other metal elements in the waste catalyst is not affected.

The invention discloses a method for processing a cobalt-copper-iron alloy, which comprises the steps of pre-processing, first-stage leaching, second-stage leaching, and purifying and deironing with leaching solution. The method of the invention has the advantages of simple process, low production cost and high recovery rate of the metal cobalt.

The invention discloses a selective heap leaching gold extraction process for gold mine containing copper, belonging to the field of hydrometallurgy. The process comprises the steps of: smashing and heaping gold mine containing copper; carrying out alkali treatment on the mine; then adding ammonium salt and sodium cyanide according to a certain proportion to realize the selective leaching of the gold and the restriction to the leaching of the copper; and finally absorbing and extracting the gold from leaching solution by conventional active carbon. The invention has the advantages of simple process method, short procedure, simple equipment, easy implementation, high gold leaching efficiency, low consumption of sodium cyanide, low energy consumption, little investment and low cost, and is the gold extraction method with easy realization of industrialized production and favorable economical benefit.

The invention relates to a method for extracting tea saponin from camellia seed meal, comprising the following steps of: crushing camellia seed meal into powder with the particle size of 100-200 meshes, packaging into cloth bags and sealing the openings; putting the cloth bags with the camellia seed meal into a batch extractor which is provided with a filter screen at the position of a conical opening of a conical tank bottom and connected with a condenser; injecting hydrous ethanol into the batch extractor according to the mass ratio of the camellia seed meal powder to the ethanol of 1:8-10, raising the temperature to 80-90 DEG C to enable the ethanol to back flow, extracting tea saponin in the states of stirring and ethanol reflux for 3-4h to obtain a tea saponin extract; pumping the extract out from the batch extractor, injecting into a concentration tank and carrying out the triple-effect concentration to obtain tea saponin rough products with the tea saponin yield of about 20 percent. With the method, the problem of plugging in the procedure of separating the tea saponin extract can be solved; and the method can improve the yield of the tea saponin, save the filter procedure and simplify the process.

The invention discloses a selective zinc oxide leaching and weak acidic zinc sulfide flotation smelting and selection combining process. For oxygen and sulfide mixed lead zinc ore, a zinc wet-method smelting process and a zinc flotation process are combined, zinc oxide in the ore is partially and selectively leached out by the first wet-method smelting process, and then zinc sulfide in the ore is floated out by the flotation process. In order to overcome the difficulty in treating the oxygen and sulfide mixed lead zinc ore, the invention provides the smelting and selection combining process which is short in process flow, reliable in technology, easy to operate and control, relatively low in material consumption and energy consumption for production, high in metal reclaiming efficiency, relatively good in economic benefit and high in practicability, the recovery of lead and zinc in the low-grade complex difficultly-selected oxygen and sulfide mixed lead zinc ore can be greatly improved, and the total recovery of lead and zinc can be up to over 90 percent.

The invention provides a process for smelting zinc with a wet method of high temperature and high acid-jarosite iron removing-iron vitriol slag pickling at two stages, belonging to the technical field of non-ferrous metal smelting. The process comprises the following steps of neutral leaching, acid leaching at the first stage, acid leaching at the second stage, pre-neutralizing, settling vitriol and pickling to obtain zinc metal with a high recovery rate. The total recovery rate of zinc metal is 94.45%. The loss of valuable metal in iron vitriol slag is less, the recovery rate of metal is high, and the pollution of vitriol slag to the environment is improved.

The invention provides a method for decomposing scheelite. The method comprises the following steps: carrying out complexing decomposition by adopting hydrochloric acid with a certain concentration and phosphoric acid with a certain ratio; after decomposing, enabling tungsten to directly enter a decomposed solution in a manner of heteropoly acid; filtering to obtain a filtrate; extracting tungstophosphoric heteropoly acid in the filtrate by using N235; extracting and separating; carrying out stripping on a loading organic phase by using NaOH; adding calcium sulfate into raffinate; filtering to obtain the hydrochloric acid for circular utilization; circularly utilizing a stripping organic phase; acidifying a stripping solution to adjust the pH (Potential of Hydrogen); evaporating and crystallizing to obtain a sodium phosphotungstate crystal. The method for decomposing the scheelite has the advantages that a traditional scheelite single acid decomposition concept is changed, and the hydrochloric acid and the phosphoric acid are used for carrying out the complexing decomposition on the scheelite to improve the leaching efficiency of the tungsten; the scheelite decomposed solution is treated by an extraction method to improve the concentration of the tungsten and reduce the water use amount of a tungsten smelting process; the water circulation of the whole process is easy to realize; the regeneration of a decomposition reagent is realized by using the calcium sulfate and the production cost is greatly reduced; prepared heteropolyphosphotungstate has a very wide application.

The present invention is improved process of extracting manganese form dialozite, and belongs to the field of wet metallurgy of dialozite. The materials include dialozite and sulfuric acid in the weight ratio of 1 to 0.3-0.8, as well as reductant in 1-18 wt% of dialozite and including sulfite, thiosulfate, SO2, iron pyrite, ascorbic acid and hydroxylamine. The process includes the following steps: filtering the acid leachate of dialozite, adding pyrolusite with MgO2 content of 15-90 wt%; ferrous compound eliminating reaction at 40-80 deg.c for over 20 min; and adding alkali, ammonia, lime, sodium carbonate, sodium bicarbonate and sodium hydroxide into the acid leachate of dialozite to regulate pH value to 5.0-8.0. The present invention has the advantages of less pyrolusite consumption,high Mg leaching rate and low Mg content in slag.

The invention discloses a method for preparing hawthorn fruit vinegar beverage by continuously fermenting various mixed strains. The method comprises the following steps: (1) preparing materials; (2) carrying out vacuum leach and enzymolysis; (3) carrying out alcoholic fermentation: inoculating saccharomycetes into leaching solution and fermenting for 10 days at temperature of 25-32 DEG C; (4) carrying out lactobacillus fermentation: inoculating lactobacilli into fermented liquid after the alcoholic fermentation and ending the lactobacillus fermentation at the temperature of 37-40 DEG C when the alcoholic strength is 6-8%; (5) carrying out acetic fermentation: inoculating bacillus aceticus AS1.41 and fermenting for 72-84 hours at the fermentation temperature of 30 DEG C; and (6) sequentially cleaning, blending, homogenizing and sterilizing to acquire the hawthorn fruit vinegar beverage. The hawthorn fruit vinegar beverage prepared through the method is red and brown in color and properly sweet and sour; the hawthorn fruit vinegar beverage has excellent flavor and taste of flavor substances on basis of keeping original nutrient substances; meanwhile, continuous fermentation can be carried out and the production efficiency is high.

The invention belongs to the field of nonferrous metal hydrometallurgy and discloses a process of efficiently recovering copper from lead matte according to oxygen pressure acid leaching and vortex electrolysis techniques. The method includes: taking lead matte as a raw material, crushing and grinding the lead matte, screening through a 100-mesh sieve, adding into a high-pressure autoclave along with sulfuric acid and a dispersing agent, feeding oxygen for leaching, carrying out liquid-solid separation to obtain solution containing copper sulfate, subjecting the solution containing copper sulfate to vortex electrolytic decopperation to obtain cathode copper, and returning after-electrodeposition liquid to the leaching procedure to replace sulfuric acid serving as the leaching agent. High efficiency in copper recycling can be realized, electrodeposition of copper can be selectively carried out according to the vortex electrolysis techniques, and high current level and current efficiency, low reagent consumption, reduction of production cost and improvement of enterprise benefits are realized. In addition, due to closed cycle of solution, harmful gas emission is avoided, and current concepts of circular economy and environment protection are met.

The invention relates to a method for preparing raw materials containing rare ginsenoside Rg3, Rh2 and the like for medicines, foods and healthcare products through process steps of wetting, steam explosion and the like of an acid reagent by taking ginseng, American ginseng, ginseng stem leaves and ginseng stem leaves as raw materials. The method disclosed by the invention has advanced process and is simple and feasible, the products prepared by the method disclosed by the invention contain the rare ginsenoside Rg3, Rh2 and the like, and the leaching rate of effective elements is high, the leaching is rapid, and effective elements are easy to be absorbed by human bodies. The products can be applied to the medicines, the foods and the healthcare products directly or after being simply processed.

The invention relates to a method for recovering platinum and rhenium from an aluminum base platinum-rhenium reforming catalyst. A step-by-step leaching method is adopted, the rhenium is subjected to alkaline leaching at first, then carrier complete dissolution is conducted to leach out the platinum, and resin adsorption is conducted for recovering the rhenium and the platinum correspondingly. The process route comprises low-temperature roasting for removing carbon deposits, alkaline method rhenium leaching, resin adsorption for recovering the rhenium, carrier complete dissolution, R410 resin adsorption for recovering the platinum and recovering of aluminum from adsorption tail liquid in an amine-alum method. The method is simple and short in process and low in recovery cost, the large amount of aluminum in the adsorption tail liquid is recovered in the form of exsiccated ammonium alum, the platinum recovery rate reaches 99.0%, the rhenium recovery rate is greater than 94.3%, and the sponge platinum purity is greater than or equal to 99.95%.

The invention discloses a process for extracting pachyman from poria coccus wolf. The process comprises the following steps: (1) selecting a poria coccus wolf raw material, and conducting ultrafine grinding to obtain poria coccus wolf coarse powder; (2) adding water into the poria coccus wolf coarse powder for soaking, and placing the soaked poria coccus wolf coarse powder in 40000 Hz ultrasonic waves to be treated for 20-25 min; (3) conducting water bathing and then conducting centrifugal separation; (4) conducting enzymolysis separation by adopting a compound enzyme to obtain a filtrate; (5) conducting protein precipitation and filtration, and centrifugally collecting a supernate; (6) concentrating a pachyman extract to be 10 to 20% of the original volume to obtain a pachyman concentrate, and conducting spray drying to obtain coarse pachyman; (7) conducting ultrafiltration, then conducting column chromatography to obtain purified pachyman, and conducting freeze drying so as to obtain the pachyman. According to the process, an ultrasonic-assisted extraction method is utilized, the process steps are simple, the pachyman leaching rate can be obviously increased, the extracted pachyman is low in possibility of stereostructure damage and high in biological activity, and the advantages that the leaching time is shortened, the extraction conditions are mild, and the reaction product is free of toxic or side effect are achieved.

The invention provides a method for separating tin, antimony, bismuth, arsenic and copper from tin electrolytic anode mud. The method comprises the following steps of: grinding the tin electrolytic anode mud finely, mixing the tin electrolytic anode mud with an oxidizing agent, adding a NaOH solution, stirring the mixture at a certain temperature under certain pressure, and thus obtaining dissolved serous fluid; and filtering to obtain a sodium stannate solution, cooling naturally to room temperature, filtering, decomposing the obtained filtrate by introducing carbon dioxide or adding NaHCO3, filtering, and thus obtaining an alkali solution and stannic oxide. By the method, the problem of difficulty in separation of the tin and the antimony in the tin anode mud is solved, and other valuable metals in the tin anode mud can be subsequently recovered smoothly; compared with a method for processing the anode mud by an acid method, the method has the obvious advantage that: the discharging of waste liquid and waste gas is avoided in the process of utilizing the anode mud comprehensively; and the method has a short process, makes simple equipment used, is energy-saving and environment-friendly and is worthy of being applied and popularized.

The invention relates to a method for promoting germination of wheat and barley, which comprises the concrete steps of: 1. soaking barley: in the stage of soaking wheat, adding phytase with the mass being 0.05-0.10% of the mass of the barley; adjusting the pH value of the barley soaking water to be 7, soaking the barley for 3-5h at the temperature which is fit for the barley, and removing water for 8-11h; soaking the barley for 3-5h again, removing water for 8-11h, and repeatedly operating for 2-3 times; 2. germinating: supplementing water every 6-8h of soaking barley after the water is removed, turning over every other 6-8h, and controlling the total germinating time to be within 96-120h; and 3. drying, carrying out common humidity removal and kilning. In the germination process of the barley, the activity of alpha-amylase is improved by 20-50%, the activity of the protease is improved by 40-89%, and the activity of phytase is improved by 50-70%. The leaching rate of malt is improved to 80-81% from 79-80%, and the period for making the barley is shortened by 24h. The method is accordance with the requirements of food safety and environmental protection.

The invention relates to a technology for purifying scandium, titanium and vanadium from an acid solution step by step. According to the technology, the acid solution obtained by leaching red mud through sulfuric acid is subjected to three-time extraction work, and an extraction organic phase is composed of a P507 extraction agent, a TBP synergist and sulfonated kerosene; in the first-time extraction process, the acid solution is directly subjected to scandium extraction and enrichment without pH value adjustment, after two-phase separation, a scandium-enriched organic phase and a titanium and vanadium containing solution are obtained, the scandium-enriched organic phase is subjected to sulfuric acid scrubbing and reverse extraction of sodium hydroxide, and scandium-enriched liquid is obtained; after the titanium and vanadium containing solution is subjected to pH value adjustment, the second-time extraction work is conducted for enrichment and separation of titanium, after two-phase separation, a titanium-enriched organic phase and a vanadium-containing solution are obtained, and after the titanium-enriched organic phase is subjected to sulfuric acid scrubbing and reverse extraction of hydrofluoric acid, titanium-enriched liquid and the vanadium-containing solution are obtained; and after the vanadium-containing solution is subjected to pH value adjustment and reducing treatment, the third-time extraction is conducted, and after two-phase separation, a vanadium-enriched organic phase and raffinate are obtained. The technology has the beneficial effects that the separation efficiency is high, the enrichment multiple is large, the technology is simple, and the number of the kinds of extraction agents is small.

The invention discloses a method for recovering valuable metals from waste lithium ion battery, which comprises the following steps: (1) pretreatment: separating positive and negative electrode powderfrom waste lithium ion battery; 2, leaching, and taking leach solution; 3) purification: adding alkali to that leach solution to adjust the pH value, and removing iron, aluminum and copper to obtainpurified solution; (4) Component control and evaporation concentration: adjusting the proportion of nickel, cobalt and manganese in the purified solution; then evaporating and concentrating, enrichingnickel, cobalt and manganese to set concentration to form precursor preparation liquid; 5) synthesis: passing the precursor preparation liquid, NaOH solution and ammonia water into a reaction kettle,controlling the pH value of the solution in the reaction kettle, carrying out reaction, and filtering after the reaction, wherein the filtered residue is the a ternary precursor. The leaching solution of the invention is purified, nickel cobalt manganese salt is supplemented, evaporated and concentrated, and the precipitant is added to directly synthesize the ternary precursor. The utility modelhas the advantages of short process flow, low consumption of raw materials, high recovery rate and high added value of products.

The invention discloses a method for leaching vanadium from vanadous stone coal ore with fluosilicic acid and sulphuric acid, comprising the following steps: smashing and wet grinding the vanadous stone coal ore so that granularity is less than 0.15mm; adding fluosilicic acid of which dosage is 5-15% of the vanadous stone coal ore by weight percent and is calculated with 100% of fluosilicic acid by weight percent and sulphuric acid of which dosage is 10-25% of the ore by weight percent to leach vanadium at 80-95 DEG C for 2-20 hours; obtaining vanadium-containing leaching liquor by liquid-solid separation after leaching; reducing ferric ion with iron powder; adjusting the pH value to 2.8-3.0 with lime and ammonia; extracting with solvent; oxidizing; adding ammonia to obtain ammonium polyvanadate precipitate; and calcining ammonium polyvanadate to prepare powdered vanadium pentoxide product; wherein, the ratio of the volume of the water in the pulp obtained by wet grinding to the mass of the ore is 1-3:1. The invention has the following beneficial effects: 1. compared with a technology of leaching vanadium from the vanadous stone coal ore solely with the sulphuric acid, the method can save 5%-25% of sulphuric acid; 2. the method creates a condition for leaching vanadium with sulphuric acid, because hydrofluoric acid generated by the hydrolysis of fluosilicic acid can effectively destroy the crystal structure of siliceous-aluminous minerals which contains roscoelite, kaolin, and the like; 3. the fluosilicic acid can be the industrial byproduct fluosilicic acid and the fluosilicic acid-containing industrial waste water; 4. the vanadium leaching rate of the vanadous stone coal ore is high.

The invention discloses a wet-process comprehensive recovery and utilization method for zinc replacement residues. The wet-process comprehensive recovery and utilization method can efficiently recover zinc, germanium, gallium, copper, iron and silicon dioxide in the zinc replacement residues, and the leaching rates of all the metals are all higher than 94%. The wet-process comprehensive recovery and utilization method is conductive to improving the metal comprehensive recovery rate, meanwhile, the energy consumption in the whole technological process is reduced, generated waste liquid is returned for leaching to achieve the purpose of cyclic utilization, the problem of environmental pollution is solved, and the wet-process comprehensive recovery and utilization method is environment-friendly.

The invention discloses an auxiliary leaching agent for ion-type rare earth ore leaching and an ore leaching method thereof. The auxiliary leaching agent is a water-soluble aminopolycarboxylic acid compound, and ion-type rare earth ores are leached by adopting an ore leaching solution formed by mixing a leaching agent with the auxiliary leaching agent. An RE-N coordination compound can be formed via nitrogen-atoms on amino groups during coordination of the auxiliary leaching agent and rare earth, an RE-O coordination compound can be formed via oxygen atoms on carboxyls, the complexing constant of rare earth and the auxiliary leaching agent is increased, and an obtained rare earth complex is more stable, so that the leaching reinforcement effect is improved. After the auxiliary leaching agent is used in the ore leaching process, the rare earth leaching rate is increased, the use amount of the leaching agent is reduced, the production cost is reduced, and the ammonia nitrogen pollution is reduced.

The invention relates to a production process for comprehensively recovering valuable metal of copper, cobalt and iron alloy, belonging to the technical field of hydrometallurgy and comprising the steps of: preparing fine alloy powder with the mesh of -100 by vibrating, grinding, screening and grading the copper, cobalt and iron alloy; adding water to the fine alloy powder to stir; then adding a required theoretical quantity of fluorine ions F-; adding inorganic acid to react for 1.5 hours; slowly adding oxidant solution; stirring for 1.5 hours at the continuous temperature of larger than 85 DEG C after adding the oxidant solution; separating solid from the solution; adding a reducer whose use quantity is 1.05 times of the theoretical quantity to the obtained filtrate; stirring at normal temperature; reacting for 2 hours; obtaining cuprous chloride and pre-extraction solution after filtering; and finally carrying out P204 extraction and P507 extraction on the pre-extraction solution; and evaporating and crystallizing to obtain cobalt chloride. The production process has the advantages of environmental-friendly performance, simple operation, high efficiency, energy saving and suitability for industrial production.