Method for making lithium phosphate used as new energy battery based on low-grade lithium phosphate
A lithium phosphate, low-grade technology, applied in the field of lithium phosphate, can solve the problems of low content of active components of lithium phosphate, high production cost, low material conversion rate, etc.
Active Publication Date: 2021-09-14
自贡同发荣新材料有限公司
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Problems solved by technology
At present, there are a large number of low-grade lithium phosphates on the market, most of which are additional products formed during the production of lithium carbonate. This type of low-grade lithium phosphate has high impurity content, coarse particle size, and low active ingredient content of lithium phosphate. The compound acid method is used to extract lithium metal from this kind of low-grade lithium phosphate, which not only has a long production process, high production cost, low material conversion rate, but also generates a lot of waste
There is no relevant process in the prior art to convert this type of low-grade lithium phosphate into lithium phosphate that can be used in new energy batteries, which seriously restricts the development of new energy batteries and the efficient recycling of low-grade lithium phosphate
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[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0054] refer to figure 1 , which is a schematic flow chart of a method for producing lithium phosphate used as a new energy battery based on low-grade lithium phosphate provided by the present invention. The method for making lithium phosphate used as a new energy battery based on low-grade lithium phosphate comprises the following steps:
[0055] Step S1, mixing low-grade lithium phosphate and water according to a predetermined weight ratio to form lithium phosph...
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The present invention provides a method for making lithium phosphate used as a new energy battery based on low-grade lithium phosphate, which includes the steps of preparing lithium phosphate slurry, complexation reaction, ultrasonic crystallization, purification and drying. Slurry preparation and complexation reaction are carried out to convert the impurities of calcium compounds, magnesium compounds and iron compounds in the low-grade lithium phosphate into water-soluble compounds, and avoid the re-incorporation of impurities in the subsequent ultrasonic crystallization process In crystals, this can effectively improve the purity of lithium phosphate crystals and reduce the particle size of lithium phosphate crystals, thereby realizing the large-scale conversion of low-grade lithium phosphate into lithium phosphate that can be used in new energy batteries and improving the repetition of low-grade lithium phosphate Utilization efficiency and reduction of resource waste and environmental pollution.
Description
technical field [0001] The invention relates to the technical field of making new energy batteries, in particular to a method for making lithium phosphate used as a new energy battery based on low-grade lithium phosphate. Background technique [0002] At present, new energy batteries mainly use three different types of materials: lithium manganese oxide, lithium iron phosphate and ternary materials. Among them, lithium iron phosphate is gradually occupying an important position in new energy batteries due to its economic and technical advantages. leading position. Lithium iron phosphate is usually synthesized from iron phosphate and lithium phosphate. Therefore, lithium phosphate is used as the raw material of lithium iron phosphate battery. The purity and quality of lithium phosphate have a crucial impact on lithium iron phosphate battery. Currently, there are a large number of low-grade lithium phosphates on the market, most of which are additional products formed during ...
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IPC IPC(8): H01M4/58H01M10/052C01B25/30
CPCC01B25/30H01M4/5825H01M10/052Y02E60/10
Inventor 赵本富郝俊王筱静孙丽
Owner 自贡同发荣新材料有限公司