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Lithium carbonate preparation method based on combination of salt lake ore, lithium polymer and spodumene

A lithium polymer, spodumene technology, applied in lithium carbonate;/acid carbonate, lithium halide and other directions, can solve the problems of harsh process conditions, low quality of raw materials, and low resource utilization, etc. To achieve the effect of broad process conditions, reduced production, and less potential safety hazards

Pending Publication Date: 2021-04-16
广西雅保锂业有限公司
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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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  • Lithium carbonate preparation method based on combination of salt lake ore, lithium polymer and spodumene

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0036] Such as figure 1 Shown, a kind of lithium carbonate preparation method based on salt lake ore, lithium polymer and spodumene combination may further comprise the steps:

[0037] S1. After the spodumene is sequentially calcined and cooled, the spodumene baking material is obtained, and the lithium polymer is added. The weight of the lithium polymer accounts for 20% to 80% of the weight of the spodumene baking material. The lithium polymer and the spodumene After the roasting material is mixed, it is crushed, finely ground, reacted with acid, and cooled. After the product to be reacted with acid is cooled to ≤90°C, it is made into a slurry with water. The solid content of the slurry is 10% to 70%, and the particle size of the finely ground is required to be 200 mesh. , ...

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Abstract

The invention relates to the technical field of lithium carbonate production, in particular to a lithium carbonate preparation method based on combination of salt lake ore, a lithium polymer and spodumene, which comprises the following steps: sequentially calcining and cooling spodumene, adding the lithium polymer and the calcined spodumene, crushing, finely grinding, adding acid for reaction, cooling, size mixing, leaching, and squeezing and separating by a filter press, and adding salt lake ore, purifying, filtering, causticizing, freezing to separate sodium sulfate, evaporating and concentrating, carbonizing, centrifugally drying, carrying out jet milling and the like to obtain lithium carbonate. The spodumene, the lithium polymer and the salt lake ore are mixed to produce the lithium carbonate, the resource utilization rate is increased, the influence of spodumene tension on production is relieved, the dilemma of insufficient lithium ore resources is solved, the risk of insufficient resource resistance of a production line is increased, and the lithium polymer and the salt lake ore with higher quality are mixed with the spodumene to serve as raw materials. And in the earlier stage treatment, the process conditions are wider than those of the single use of spodumene as the raw material.

Description

technical field [0001] The invention relates to the technical field of lithium carbonate production, in particular to a method for preparing lithium carbonate based on a combination of salt lake ore, lithium polymer and spodumene. Background technique [0002] Lithium carbonate can be used to make ceramics, medicines, catalysts, etc., and is also a commonly used raw material for lithium-ion batteries. As the positive electrode material of lithium-ion batteries, the high-purity lithium carbonate used in the electrolyte has attracted more and more attention. At present, the methods for producing lithium carbonate include producing lithium carbonate from spodumene, extracting lithium from salt lake brine, and extracting lithium carbonate from seawater. The process uses spodumene and salt lake ore as raw materials, and produces lithium carbonate through high-temperature calcination transformation, cooling, ball milling, acidification roasting, cooling, pulping, leaching and pre...

Claims

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Application Information

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IPC IPC(8): C01D15/08C01D15/04
Inventor 何开茂何东利伍震洲汪梨超杨贤丽江莹代道和谭培渊黄剑新
Owner 广西雅保锂业有限公司
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