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Process for producing lithium carbonate by mixing lithium polymer and salt lake ore

A lithium polymer, lithium carbonate technology, applied in the preparation of lithium carbonate;/acid carbonate, sulfate/bisulfate, etc., can solve the problems of large waste residue, severe process conditions, and low quality of raw materials

Inactive Publication Date: 2021-05-18
广西天源新能源材料有限公司
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  • Abstract
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Problems solved by technology

[0004] Using spodumene as a raw material to prepare lithium carbonate, due to the low quality of the raw material and relatively strict process conditions, the production is difficult, and there is a lot of waste residue generated, and the resource utilization rate is low

Method used

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  • Process for producing lithium carbonate by mixing lithium polymer and salt lake ore

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Embodiment Construction

[0031]The invention is further described below with reference to the accompanying drawings, but the scope of the invention is not limited to the following.

[0032]Such asfigure 1As shown, a process for mixing lithium carbonate with lithium polymer and salt lake ore, including the following steps:

[0033]S1, the lithium polymer sequentially passes, cooled, fine mill, adding acid, cooling, the product to be added to ≤90 ° C, and the slurry solid content is 10% to 70%, thin mill solid content. The particle size is required to be 200 mesh, the calcination temperature is 1000 ~ 1250 ° C; when the acid is added, the concentration of 98% sulfuric acid, acid material ratio = 2 to 5: 1, more preferable, add the acid to 60 ° C. Hereinafter, when cooling, it is cooled in a water-cooled manner;

[0034]S2, in the slurry obtained in step S1, the calcium salt slurry is stirred and leached, and the solid content of the calcium salt slurry is 10% to 55%; the temperature ≤ 60 ° C in the leaching tank is ≤6...

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Abstract

The invention relates to the technical field of lithium carbonate production, in particular to a process for producing lithium carbonate by mixing a lithium polymer and salt lake ore. The process comprises the following steps: sequentially calcining the lithium polymer, cooling, finely grinding, adding acid to react, cooling, mixing slurry, leaching, squeezing and separating by a filter press, adding the salt lake ore, purifying, filtering, causticizing, and freezing to separate sodium sulfate, evaporating and concentrating, carbonizing, centrifugally drying, crushing by air flow and the like to obtain the lithium carbonate. According to the process, the salt lake ore and the lithium polymer are mixed to produce lithium carbonate, the lithium polymer is a novel ore source and has extremely high extraction value and great economic benefits, the dilemma of insufficient lithium ore resources is solved, the risk of insufficient resistance resources of a production line is increased, and meanwhile, the problem of low quality of lithium hydroxide produced by salt lake ore resources is solved; the lithium polymer with higher quality is adopted as the raw material, and in the earlier stage treatment process, the process conditions are wider than the process conditions when spodumene is adopted as the raw material.

Description

Technical field[0001]The present invention relates to the field of production techniques of lithium carbonate, particularly a process for mixing lithium carbonate with lithium polymers and saline ore.Background technique[0002]Lithium carbonate can be used in ceramic, drugs, catalysts, and the like, and is also commonly used for lithium ion batteries. As the positive material of the lithium ion battery, the high pure grade carbonate used in the electrolyte is increasingly attached to people. The current production of lithium carbonate has lithium carbonate, salted lithium, and lithium salt lakes from seawater. The process is based on lithium glow and salt lake ore as a raw material, which is highly temperature calcined, cooled, ball milling, acidified roasting, cooling, gel, leaching press separation, frozen separation of sodium sulfate, evaporation, carbonization, centrifugal drying and other process steps to produce lithium carbonate .[0003]However, the lithium-glutinous stone reso...

Claims

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Application Information

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IPC IPC(8): C01D15/08C01D5/02
CPCC01D5/02C01D15/08C01P2006/82
Inventor 何开茂何东利伍震洲汪梨超江莹代道和杨贤丽谭培渊黄剑新
Owner 广西天源新能源材料有限公司
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