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Preparation method of lithium sulfate concentrated purification liquid in process of producing battery-grade lithium carbonate

A technology of concentration and purification, lithium sulfate, applied in lithium sulfate/sulfite, lithium carbonate;/acid carbonate and other directions, can solve the problem of high energy consumption, low energy consumption, lithium sulfate concentration and purification of impurities Low content and other problems, to achieve the effect of low process energy consumption and low impurity content

Inactive Publication Date: 2018-01-05
SHANDONG LUBEI ENTERPRISE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The concentrated lithium sulfate prepared by the invention has low content of liquefied impurities and low energy consumption, and the qualified rate of the produced battery-grade lithium carbonate reaches 95-100%, which solves the problems of low yield and high energy consumption, and is of great significance

Method used

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  • Preparation method of lithium sulfate concentrated purification liquid in process of producing battery-grade lithium carbonate
  • Preparation method of lithium sulfate concentrated purification liquid in process of producing battery-grade lithium carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. The purification solution for impurity removal and purification meets the following indicators for storage. T=85℃ pH=11~12 SS=17PPmT.H=310mg / l Li 2 SO 4 9%

[0026] 2. The purification solution enters the resin tower process pH value regulator, adding sulfuric acid to adjust the pH value index is:

[0027] T=87℃ pH=9.5~10.5 SS=18PPm T.H=310mg / l Li 2 SO 4 9%

[0028] 3. After passing through the two-stage heat exchanger, the cooling index is: T=43°C, pH=9.5~10.5 SS=18PPm T.H=310mg / l Li 2 SO 4 9%

[0029] 4. The indicators of the security filter entering the membrane filtration system are: T=43°C, pH=9.5~10.5 SS=15PPm T.H=310mg / l Li 2 SO 4 9%

[0030] 5. The indicators for the purified liquid to enter the ultrafiltration device are: T=43°C, pH=9.5~10.5 SS=1PPm T.H=310mg / l Li 2 SO 4 9%

[0031] 6. The purified liquid is transported by the tower pump to the purified liquid and enters the chelating resin tower system for ion adsorption, and the resin fil...

Embodiment 2

[0034] 1. The purification solution for impurity removal and purification meets the following indicators for storage. T=87℃ pH=11~12 SS=16PPmT.H=305mg / l Li 2 SO 4 10%

[0035] 2. The purification solution enters the resin tower process pH value regulator, adding sulfuric acid to adjust the pH value index is:

[0036] T=87℃ pH=9.5~10.5 SS=17PPm T.H=305mg / l Li 2 SO 4 10%

[0037]3. After passing through the two-stage heat exchanger, the cooling index is: T=45°C, pH=9.5~10.5 SS=18PPm T.H=310mg / l Li 2 SO 4 10%

[0038] 4. The index of the security filter entering the membrane filtration system is: T=45°C, pH=9.5~10.5 SS=12PPm T.H=305mg / l Li 2 SO 4 10%

[0039] 5. The indicators for the purified liquid to enter the ultrafiltration device are: T=45°C, pH=9.5~10.5 SS=0.8PPm T.H=305mg / l Li 2 SO 4 10%

[0040] 6. The purified liquid is transported to the chelating resin tower system through the tower pump for ion adsorption, and the resin filling volume is 0.7m 3 Res...

specific Embodiment approach 3

[0042] 1. The purification solution for impurity removal and purification meets the following indicators for storage. T=86℃ pH=11~12 SS=15PPmT.H=300mg / l Li 2 SO 4 11%

[0043] 2. The purified liquid enters the resin tower process PH value regulator, adding sulfuric acid to adjust the PH value index is:

[0044] T=86℃ pH=9.5~10.5 SS=16PPm T.H=300mg / l Li 2 SO 4 11%

[0045] 3. After passing through the two-stage heat exchanger, the cooling index is: T=40℃, pH=9.5~10.5 SS=16PPm T.H=300mg / l Li 2 SO 4 11%

[0046] 4. The indicators of the security filter entering the membrane filtration system are: T=40°C, pH=9.5~10.5 SS=10PPm T.H=300mg / l Li 2 SO 4 11%

[0047] 5. The indicators for the purified liquid to enter the ultrafiltration device are: T=40°C, pH=9.5~10.5 SS=0.5PPm T.H=300mg / l Li 2 SO 4 11%

[0048] 6. The purified liquid is transported to the chelating resin tower system through the tower pump for ion adsorption, and the resin filling volume is 0.8m 3 Resin...

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Abstract

The invention discloses a preparation method of lithium sulfate concentrated purification liquid in a process of producing battery-grade lithium carbonate. The method comprises the following steps: successively filtering lithium sulfate purification liquid produced in a leaching workshop by using a membrane, refining by using a resin column, and concentrating with membrane to obtain lithium sulfate concentrated purification liquid. The lithium sulfate concentrated purification liquid prepared by the invention is low in impurity content, low in energy consumption and capable of producing battery-grade lithium carbonate with a qualification rate reaching 95 to 100 percent and according with the national standard YS582-2013.

Description

technical field [0001] The invention relates to a method for preparing lithium sulfate concentrated purification liquid in the process of producing battery-grade lithium carbonate. A kind of spodumene-sulfuric acid method that the present invention relates to produces the lithium sulfate concentrated purification liquid preparation new technology of lithium carbonate industry of battery grade, the invention of this technology has solved the traditional high energy consumption of this industry, product qualified rate is low (battery grade lithium carbonate qualified Purification of impurity removal with a rate of less than 70% - preparation process of evaporating and concentrating lithium sulfate concentrated purification solution. The production cost is reduced, the added value of the product is increased, and the qualification rate of the battery-grade lithium carbonate reaches more than 95%. Background technique [0002] Due to the current rapid development of new materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D15/06C01D15/08
Inventor 吕天宝武文焕郭延民冯怡利李金辉
Owner SHANDONG LUBEI ENTERPRISE GROUP
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