3results about How to "Fully leached" 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.

The invention discloses a method for synergistically recovering key metals from secondary resources, which comprises the following steps: S1, low-temperature roasting: after crushing an aluminum-based molybdenum-nickel waste catalyst, carrying out low-temperature roasting; s2, primary alkaline leaching and filtering: carrying out primary alkaline leaching on the aluminum-based molybdenum-nickel waste catalyst powder to obtain primary alkaline leaching liquid and primary alkaline leaching residues; s3, secondary alkaline leaching and filtering: carrying out secondary alkaline leaching on the primary alkaline leaching residues to obtain secondary alkaline leaching liquid and nickel-aluminum residues; s4, high-acid leaching: adding titanium dioxide waste acid and scandium-rich slag into the nickel-aluminum slag, cooperatively performing high-acid leaching, and adding MHP slurry to obtain high-acid leaching liquid and high-acid leaching slag; s5, low-acid leaching: adding MHP slurry into the high-acid leaching solution, and carrying out low-acid leaching to obtain low-acid slurry; and S6, settling by using a thickener: feeding the low-acid leaching solution into the thickener, and carrying out settling separation. According to the method, valuable metals in secondary resources can be effectively recovered, the recovery rate is remarkably increased, the purpose of treating waste with waste is achieved, the process cost is remarkably reduced, and economic benefits are greatly increased.

This utility model discloses a soil microbial strain leachate collection device, belonging to the field of microbial strain collection technology. It solves the problem that existing collection devices cannot fully leach microbial strains from the leachate. The device includes a shell assembly and a filtration mechanism. The filtration mechanism is installed inside the shell assembly and consists of a filter cylinder, a stirring shaft, and a crushing component. The rotation of the stirring shaft drives the crushing component to crush the clumps of soil inside the filter cylinder, ensuring that the microbial strains in the soil can be fully leach into the leachate. In addition, a cleaning brush and a cleaning scraper are installed on the outside of the filter cylinder, which can clean the microbial strains on the outer wall of the filter cylinder and the inner wall of the outer shell and let them enter the leachate, thereby improving the collection effect of microbial strains.