Ultrafine grinding device system for battery-grade lithium hydroxide

Abstract

The invention relates to an ultrafine grinding device system for battery-grade lithium hydroxide. A main body of the ultrafine grinding device system for the battery-grade lithium hydroxide is a jet mill main machine, a feeding port, a gas inlet and a discharging port are arranged on the jet mill main machine, an air compressor, a carbon dioxide removing device, a dryer and a first air filter arearranged on a gas circulation pipeline, and an induced pipeline is arranged on the gas circulation pipeline, an air inducing fan is arranged on an air inducing pipeline, a direct communicating pipeline is arranged at an air inlet of the jet mill main machine and connected with the carbon dioxide removing device, a gas supplementing opening is formed in the middle of the jet mill main machine, anda second air filter and an air supplementing fan are arranged on a pipeline for connecting the air supplementing opening with the gas circulating pipeline. The ultrafine grinding device system for thebattery-grade lithium hydroxide is suitable for ultrafine grinding of lithium hydroxide and is a closed-loop jet mill main machine system which is efficient, energy-saving, free of emission and zeroin pollution, and inert gas protection is achieved.

Description

technical field [0001] The invention belongs to the technical field of crushing and classifying devices, in particular to a superfine crushing device system for battery-grade lithium hydroxide. Background technique [0002] At this stage, the global energy structure is in the adjustment stage, the new energy vehicle market is exploding, and the power battery field of electric vehicles uses high-nickel ternary materials. Lithium hydroxide can increase the tap density of high-nickel ternary materials to achieve better charging and discharging Therefore, lithium hydroxide is the main raw material of high-nickel ternary materials, and the application ratio has reached more than 60%. [0003] Lithium hydroxide has strong alkalinity, the pH of 1mol / L solution is about 14, it has pungent smell and is corrosive. If there is dust leakage during the crushing process, it will be harmful to the human body and the space environment. It can react with carbon dioxide in the air to form l...

AI Technical Summary

Problems solved by technology

[0006] The particle size d50 of commonly used lithium hydroxide products requires 10-15 μm, and a large number of finer particles will be produced when crushing with a jet mill, that is, over-grinding. Although the d50 can meet the contract specifications, the fine powder content in the product is too high, such as the requirement D. min or D 10 Or the particle content of a certain particle size is not higher than a certain value, and the product quality is reduced or unqualified

Using other crushing processes such as mechanical crushing, although the content of fine powder is less, it will produce a large number of large particles, and the particle size distribution of the product will become wider, which is still an unqualified product

Images