9results about How to "Improve leaching effect" patented technology

The invention discloses a method and a device for preparing hydrophosphate based on battery powder lithium extraction slag, an operation mode of multi-stage series countercurrent leaching-segmented precise feeding-deep impurity removal and purification-closed cycle crystallization is adopted, a leaching agent adopts first-stage and second-stage segmented feeding in the leaching process, the mass transfer efficiency is greatly enhanced, and the leaching efficiency is improved. The leaching effect of the leaching agent is maximized, the leaching rate of phosphorus is remarkably improved, the problems of low phosphorus leaching rate and high product impurity content in the prior art are effectively solved, no extra wastewater is generated in the whole technological process, the leaching agent and the crystallization mother liquor are in dynamic circulation in the whole production process, and the production cost is reduced. The method has the advantages that recycling of water resources and residual effective components is achieved, environmental protection and economic benefits are achieved, the problems that in the prior art, the technological process is complex, and cost is high are effectively solved, the industrial-grade hydrophosphate product meeting the industrial standard can be directly prepared from the battery powder lithium extraction slag, and the method is suitable for industrial production. And all-component high-value recovery of the waste lithium iron phosphate battery is realized.

The application discloses a method for extracting alumina from industrial solid waste red mud. The method comprises the following steps: mixing the red mud with a composite additive composed of sodium carbonate, potassium sulfate and limestone, wet ball milling the mixture until the particle size of the mixture reaches D90≤74 μm, drying the obtained slurry until the water content is less than 5%, and sintering at 950-1050 ℃ to obtain sintered clinker; leaching and separating the sintered clinker in hot water at a liquid-solid ratio of 10:1-25:1 and at 65-95 ℃ to obtain an aluminum-containing filtrate; introducing CO2 into the filtrate to perform carbonization, and performing aging and solid-liquid separation to obtain aluminum hydroxide; and then performing washing, drying and calcination to obtain an alumina product. By introducing potassium sulfate as a fluxing agent, the transformation of inert aluminum mineral phases is promoted, the sintering temperature can be reduced by 50-100 ℃, the time can be shortened by 30-50%, the process energy consumption is low, the aluminum extraction efficiency is as high as 88% or more, and a brand-new path is provided for large-scale resource utilization of the red mud.

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.

The invention discloses an ammonia leaching process of copper oxide ore, which comprises the following steps: crushing and grinding the copper oxide ore, adding an activating agent into the obtained ore pulp for activating treatment, sequentially adding ammonia liquor and sulfide for leaching treatment and precipitation reaction, and filtering, and copper sulfide concentrate and filtrate are obtained. Compared with a conventional ammonia leaching process, the ammonia leaching process of the copper oxide ore has the advantages that the copper oxide ore is sequentially subjected to crushing, ore grinding, activating treatment, leaching treatment and precipitation reaction, the copper leaching rate of the copper oxide ore can be remarkably increased, meanwhile, agent consumption and environmental pollution are reduced, and the ammonia leaching process is suitable for efficient recovery of complex and difficult-to-treat copper oxide ore; the method has the advantages of simplicity in operation, low cost, high leaching efficiency, good leaching effect, environmental friendliness and the like, and is high in use value and good in application prospect.

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.

This invention relates to the field of mineral utilization, specifically to a method for bacterial leaching of high-fluorine-content uranium ore. The method involves crushing the high-fluorine-content uranium ore and packing it into columns or heaps to obtain a ore heap. The ore heap is then sprayed with an acidic solution. The collected leachate is subjected to uranium adsorption treatment, and the adsorption tailings are defluorinated and recycled back to the spraying process. Subsequently, bacteria are implanted into the ore heap. Then, a spray solution containing boric acid and other acids is used for bacterial leaching. The collected bacterial leachate is subjected to uranium adsorption treatment, and the adsorption tailings are recycled back to the bacterial leaching process. This invention can process uranium ore with a fluorine content of 5% or higher while still exhibiting excellent uranium leaching efficiency and effect.

The invention provides a waste lithium battery positive electrode material efficient leaching method based on electron beam rapid oxidation and application of the waste lithium battery positive electrode material efficient leaching method, and relates to the field of battery recycling. The leaching method comprises the following steps: S1, mixing black powder with water and carboxylate to prepare first slurry; and S2, carrying out electron beam irradiation treatment on the first slurry, introducing carbon dioxide, and carrying out solid-liquid separation to obtain a first lithium bicarbonate solution. Iron ions in lithium iron phosphate are rapidly oxidized by using an electron beam irradiation technology, and the use of hydrogen peroxide is reduced. Meanwhile, the effect of promoting lithium ion leaching can be achieved at normal temperature through electron beam irradiation, the requirement for the temperature in wet leaching is lowered, and therefore steam consumption is reduced.

The present application relates to a kind of resource utilization methods of lithium-containing waste, the resource utilization method includes the following steps: using hydrochloric acid to carry out acid leaching of lithium-containing waste, obtain acid leaching residue and acid leaching liquid;Using extractant extracts the obtained acid leaching liquid, obtain extract liquid and raffinate;The obtained raffinate carries out at least two times adjustment pH value, realizes the recovery of aluminum and nickel cobalt manganese element;The obtained extract liquid is back extracted, obtains lithium-rich liquid;Lithium-rich liquid is used for the preparation of lithium product after impurity removal.The resource utilization method provided by the present application can efficiently recover valuable metal elements in lithium-containing waste, avoid the generation of hazardous waste, and the acid leaching residue can be used as raw material for building materials and cement, which has high economic and environmental value;Furthermore, the use of specific extractant can also achieve efficient separation of Li and Al.

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.