Closed gas flow conveying device for battery-grade lithium hydroxide

Abstract

The invention discloses a closed gas flow conveying device for a battery-grade lithium hydroxide. The closed gas flow conveying device for the battery-grade lithium hydroxide comprises a conveying pipeline, a second material gas separator, a return pipeline and a booster fan; the conveying pipeline is arranged at one end of the booster fan and is connected to one end of the booster fan; the conveying pipeline is connected with a first unloading valve of a material supply system through a tee joint; a lithium hydroxide material in the material supply system enters the conveying pipeline throughthe first unloading valve; the second material gas separator is arranged at an end part of the conveying pipeline; the conveying pipeline is connected to one side of the second material gas separator; and the return pipeline is arranged above the second material gas separator. According to the closed gas flow conveying device for the battery-grade lithium hydroxide, a completely closed mode is adopted for conveying a battery-grade lithium hydroxide material; nitrogen gas which does not contain carbon dioxide and water is taken as a conveying medium for conveying a product from one process tothe other process; and the battery-grade lithium hydroxide material is prevented from reacting with the carbon dioxide and the water in the air, so that the product quality is ensured.

Description

technical field [0001] The invention belongs to the technical field of lithium hydroxide delivery, and in particular relates to a closed airflow delivery device for battery-grade lithium hydroxide. Background technique [0002] Lithium hydroxide is a white monoclinic fine crystal with alkali permeability. Lithium hydroxide can be used as a developing agent for spectral analysis, lubricating oil, used to make lithium salt and lithium-based grease, electrolyte for alkaline storage batteries, lithium bromide refrigeration Machine absorption fluid, lithium soap (lithium soap), lithium salt, developer, etc. or as analytical reagents, etc., widely used in petroleum, chemical, light industry, nuclear industry and other industries. Battery-grade lithium hydroxide monohydrate is mainly used in the preparation of positive electrode materials for lithium-ion batteries, and can also be used as an additive for alkaline battery electrolytes. Since lithium hydroxide has the characteristic ...

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Problems solved by technology

[0003] Traditional lithium hydroxide transportation uses a vacuum feeder for the production of ordinary industrial-grade products and products with low quality requirements. For the lithium hydroxide material used to make the positive electrode of lithium-ion batteries, the quality requirements are high, and the traditional method cannot meet the requirements. Process requirements, since the opening of the suction port of the vacuum feeder is connected to the air, the air and the lithium hydroxide material are mixed and sucked into the pipeline, the carbon dioxide and moisture contained in the air are easily absorbed by the lithium hydroxide material and deteriorate, affecting subsequent processing. Reduce the quality of the product and easily degrade the product

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