12results about How to "Improve leaching rate" patented technology

This invention discloses a method for preparing battery-grade nickel sulfate and iron phosphate using nickel pig iron and ferric phosphate slag as raw materials. The preparation process involves first mixing the ferric phosphate slag with cationic alkyl polyacrylamide to form a uniform mixture. This mixture is then added to dilute acid and stirred to disperse it. Nickel pig iron powder is added, and the mixture is filtered to obtain a leaching solution. The leaching solution is then subjected to nickel-iron separation using resin to obtain an iron-containing solution and a nickel-containing resin. The nickel-containing resin is desorbed to obtain a desorbed solution. A nickel-based pH adjuster is added to this desorbed solution, and the solution is filtered to obtain a nickel sulfate solution. After evaporation and concentration to precipitate crystals, the solution is dried and crushed to obtain battery-grade nickel sulfate. Hydrogen peroxide is added to the iron-containing solution to oxidize ferrous iron to ferric iron. A phosphorus source is added, the pH is adjusted, and the solution is reacted, filtered, and dried to obtain iron phosphate dihydrate. This is then calcined to obtain battery-grade iron phosphate. This invention uses nickel pig iron and ferrophosphate slag as raw materials, and utilizes the ferrophosphate slag to promote the full leaching of iron from nickel pig iron, and nickel pig iron to promote the leaching of phosphate and iron from ferrophosphate. With the addition of cationic alkyl polyacrylamide, it achieves high leaching rates of iron and nickel in a short time, and simultaneously achieves the separation of non-ferrous and nickel metal ions during the acid leaching process, so as to finally obtain high-purity, qualified battery-grade nickel sulfate and ferrophosphate.

This invention provides a method and equipment for recovering lithium, fluorine, and aluminum from lithium-rich waste aluminum electrolyte, relating to the field of metal material recycling. The method for recovering lithium, fluorine, and aluminum from lithium-rich waste aluminum electrolyte includes the following steps: S1, the waste aluminum electrolyte is crushed, ground, sieved, and then dried for later use. The method provided by this invention utilizes ultrasonic-assisted leaching of lithium-containing waste aluminum electrolyte with organic acid (malonic acid). Compared with traditional inorganic acid leaching, organic acid has advantages such as good biodegradability, weak acidity, low corrosiveness, recyclability, and environmental friendliness. During neutralization, cryolite byproducts are obtained, which can be returned to the aluminum electrolysis cell for reuse, realizing the recycling of fluorine and aluminum. Finally, high-purity lithium phosphate is obtained through precipitation, effectively utilizing the lithium resources in the waste aluminum electrolyte.

The application provides a method for strengthening leaching of ionic rare earth, which is based on regulation of ZETA potential and seepage rate of clay mineral by cation and anion coordination adsorption to improve leaching efficiency of ionic rare earth, and comprises the following steps: providing ionic rare earth ore, citrate solution and non-ammonium inorganic salt solution, wherein the liquid-solid ratio of the citrate solution to the ionic rare earth ore is 0.1-0.5:1, and the liquid-solid ratio of the non-ammonium inorganic salt solution to the ionic rare earth ore is 0.9-0.5:1; using the citrate solution to perform first leaching treatment on the ionic rare earth ore to obtain first leaching solution; using the non-ammonium inorganic salt solution to perform second leaching treatment on the ionic rare earth ore to obtain second leaching solution; performing first post-processing treatment on the first leaching solution to obtain rare earth; and performing second post-processing treatment on the second leaching solution to obtain rare earth. The method for leaching ionic rare earth has the advantage of high leaching rate.

The present application belongs to the technical field of lithium resource leaching, and relates to a method for preparing battery-grade lithium carbonate from low-grade lepidolite. The method comprises the following steps: raw material pretreatment, acid leaching reaction, membrane separation and purification, valuable metal separation and recovery, deep impurity removal and refinement, lithium precipitation and product forming. In the lithium extraction method, low-grade lepidolite, dilute hydrochloric acid and a catalyst are added into a specific plastic reaction kettle at a certain liquid-solid ratio for low-temperature and normal-pressure reaction, and then battery-grade lithium carbonate and other high-value-added products are obtained through subsequent solid-liquid separation, washing, membrane separation, byproduct separation and lithium precipitation processes. The method is energy-saving and environment-friendly, can improve the leaching rate of lithium and the comprehensive utilization rate of lepidolite, has high automation degree, low cost and is suitable for industrial production.

The present application belongs to the field of mineral resources utilization, and particularly relates to a method for extracting potassium from potassium-rich slate, which comprises the following steps: subjecting the potassium-rich slate to low-temperature hydrothermal treatment at a temperature T1 to obtain leaching solution A and leaching residue A; in the low-temperature hydrothermal system, the Ca / Si weight ratio is controlled to be 2.2-3.0; the temperature T1 is 120-200 DEG C; subjecting the leaching residue A and an alkali activator to high-temperature hydrothermal treatment at a temperature T2 to obtain leaching solution B and leaching residue B; in the high-temperature hydrothermal system, the Ca / Si weight ratio is 2.2-3.0; the temperature T2 is 1.1-2 times the temperature T1. In view of the problem of difficulty in extracting potassium from potassium-rich slate, the present application proposes an innovative method: first, subjecting the raw material to low-temperature hydrothermal treatment to change its phase and microstructure, and then cooperating with the subsequent high-temperature hydrothermal process, the two synergistic effects can effectively destroy the crystal structure of the potassium-rich slate, thereby significantly improving the extraction efficiency and effect of potassium.

A high-silicon copper-containing calcine leaching residue resource utilization method, comprising: mixing high-silicon copper-containing calcine leaching residue with solid strong alkali, roasting at 140-160 DEG C, obtaining roasting alkali residue; the roasting alkali residue is added with calcium oxide and water to carry out concentrated alkali leaching, solid-liquid separation, obtaining alkali leaching residue and alkali leaching liquid; the alkali leaching liquid is added with a sulfidation agent to precipitate copper, obtaining copper precipitation residue and copper precipitation liquid; the copper precipitation liquid is added with calcium oxide to remove silicon, obtaining silicon precipitation residue and silicon removal liquid; copper is enriched in the copper precipitation residue; the "low-temperature roasting + concentrated alkali leaching" process of the application can effectively destroy the stable structure of high-silicon copper-containing calcine leaching residue, so that the copper wrapped by silicon is exposed, the chemical reaction of the high-silicon copper-containing calcine leaching residue leaching process is significantly strengthened, and the copper leaching rate can be greatly improved; the roasting temperature of the application is only 140-160 DEG C, which is much lower than the general alkali roasting temperature, the energy consumption is lower, the possible high-temperature injury is reduced, and the safety is higher.

The application relates to a method and device for leaching gallium and germanium from zinc leaching residue by using a strong magnetic field and composite ultrasonic waves, which comprises the following steps: S1, drying and grinding zinc powder replacement residue cakes to obtain zinc powder replacement residue powder; S2, mixing the zinc powder replacement residue powder obtained in the step S1 with low-concentration sulfuric acid, sealing, heating, inputting oxygen, stirring, ultrasonic treatment in a magnetic field environment, and filtering to obtain first-stage acid leaching residue and first-stage acid leaching solution; S3, mixing the first-stage acid leaching residue obtained in the step S2 with high-concentration sulfuric acid, sealing, heating, inputting oxygen, stirring, ultrasonic treatment in a magnetic field environment, and filtering to obtain second-stage acid leaching residue and second-stage acid leaching solution; and S4, drying the second-stage acid leaching residue obtained in the step S3 to obtain zinc powder replacement residue for leaching gallium and germanium. Compared with the prior art, the application combines oxygen pressure, ultrasonic waves, a magnetic field and stirring and other process conditions, so that more metal elements are exposed from the inside of the zinc powder replacement residue, and the leaching efficiency is improved.

The application relates to a multi-material valuable component efficient leaching device and method based on a pressurized dissolved gas cavitation effect, which comprises a cylindrical pressure-resistant container fixed on a support in a horizontal mode, the end port of the pressure-resistant container is provided with a sealing door; a joint pipe A is arranged at the upper part of one end of the pressure-resistant container, a quick opening and closing valve is connected to the joint pipe A, a joint pipe B is arranged at the upper part of the other end of the pressure-resistant container, an air inlet ball valve is connected to the joint pipe B, and a pressure gauge is arranged in the middle part; a joint pipe C is arranged at the lower part of one end of the pressure-resistant container, a liquid discharge ball valve is connected to the joint pipe C, and a liquid inlet pipe is arranged at the upper part of the end; an aeration assembly connected with the air inlet ball valve is arranged in the pressure-resistant container; a pressurized dissolved gas-instantaneous pressure release cavitation mechanism is adopted to form microscale damage force, break through the microscale mass transfer resistance of a solid matrix, efficiently release the wrapped target components, greatly improve the leaching rate and shorten the extraction time; and process parameters can be flexibly adjusted to adapt to various materials from fragile plant tissues to hard mineral ores.

The application discloses a method for preparing aragonite type calcium carbonate by fixing carbon dioxide with steel slag, which comprises the following steps: (1) crushing and grinding the steel slag into steel slag powder, and then activating the steel slag powder in ultrasonic waves to obtain ultrasonic-activated steel slag powder; (2) mixing the ultrasonic-activated steel slag powder with water, adding pure acetic acid solvent to warm and acidify, and preparing acidified steel slag; (3) CO2 gas quenching the acidified steel slag, adding water to the acetic acid leaching solution and the steel slag powder in a mass ratio of 3-10:1, adjusting the pH of the leaching solution to 7-9, stopping the CO2 input after 10-90 min of stirring, and filtering to obtain calcium bicarbonate filtrate; and (4) crystallizing and filtering the calcium bicarbonate filtrate to obtain aragonite type calcium carbonate. The method can fix carbon dioxide in tail gas on site by using the waste steel slag stacked in a steel plant, achieves the effect of "waste treatment by waste", the leaching reagent can be recycled, and the method is economic and environment-friendly, and solves the technical problems of utilization of steel slag waste and carbon dioxide resources.

This invention relates to a method and apparatus for ultrasonically enhanced leaching of gallium and germanium from zinc powder replacement slag. The method includes the following steps: S1, drying and grinding the zinc powder replacement slag block into zinc powder replacement slag powder, adding a low-concentration sulfuric acid solution, sealing, introducing oxygen, heating, stirring, ultrasonicating, and filtering to separate a first-stage acid leaching slag and a first-stage acid leaching solution; S2, mixing the first-stage acid leaching slag with a high-concentration sulfuric acid solution, sealing, introducing oxygen, heating, stirring, ultrasonicating, and filtering to separate a second-stage acid leaching slag and a second-stage acid leaching solution; S3, drying the second-stage acid leaching slag to obtain the zinc powder replacement slag from which gallium and germanium are leached. Compared with the prior art, this invention, by combining a series of process conditions such as oxygen pressure, ultrasonication, and stirring, greatly improves the leaching efficiency of gallium and germanium. It also has the advantages of simple equipment, convenient control, and low pollution, making it suitable for traditional continuous industrial production and providing valuable reference for the leaching of other elements.

This invention provides a method and system for hydrothermal-roasting coupled cascade separation and full-component resource recovery of vanadium-phosphorus iron, belonging to the field of resource utilization technology. The invention includes raw material pretreatment, hydrothermal pre-dephosphorization, low-temperature composite salt roasting for vanadium extraction, water leaching and vanadium recovery, and molten reduction alloying. This invention pioneers a coupling mechanism between "hydrothermal pre-dephosphorization" and "low-temperature composite salt roasting for vanadium extraction," and connects it with "molten reduction alloying," forming an inseparable cascade separation and full-scale recovery closed-loop system. Under mild conditions, it achieves a phosphorus removal rate exceeding 92% and a vanadium conversion rate exceeding 99%, reducing energy consumption by approximately 30% and solid waste emissions by more than 85% compared to traditional processes. It simultaneously produces three high-value products: high-purity vanadium pentoxide, agricultural phosphate, and stainless steel master alloy, possessing multiple advantages such as high resource utilization, clean and low-carbon operation, and significant economic benefits.

The application discloses a method for quantitatively testing the content and embedded granularity of organic carbon in gold ore, and belongs to the technical field of gold ore detection. The method comprises sample preparation and quantitative testing. The sample preparation uses palm wax as a cementing agent and barite as a standard sample, and the sample to be tested is prepared through melting, mixing, solidification, polishing and carbon spraying. The quantitative testing is based on an automatic process mineralogy testing system, the palm wax background is removed through background deduction, a spectrum library is established to identify organic carbon and barite particles, the area ratio of the two is measured, the mass ratio is converted in combination with the density ratio, the content of organic carbon in the raw ore is inversely calculated, and the granularity distribution of the organic carbon is counted. The application solves the problem that the prior art cannot simultaneously accurately quantify the content and granularity of organic carbon, has the advantages of high testing precision, high efficiency, comprehensive parameters and simple operation, and can provide key data for optimizing the cyanide leaching process of gold ore.