Method for extracting lithium carbonate from mixed salt of carbonate and chlorate

A technology of lithium carbonate and chloride salt, applied in the direction of lithium carbonate;/acid carbonate, chemical instruments and methods, wet separation, etc., can solve the problem of low purity of lithium carbonate crude products and achieve lithium resources The effect of high utilization rate, low cost and simple process

Active Publication Date: 2022-07-19
CHANGSHA DESIGN & RES INST OF CHEM IND MIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The raw ore composition of this method is relatively simple, and it is only composed of NaCl and lithium carbonate. During the flotation process, the pH value of the solution needs to be adjusted, and the purity of the final crude lithium carbonate product is lower than 97%.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The present embodiment extracts the method for lithium carbonate from the mixed salt of carbonate and chloride salt, comprises the following steps:

[0031] (1) Grinding: the Li-containing + 0.35%, K + 10.00%, Na + 28.71%, CO 3 2- 5.98%, Cl - The 48.12% lithium carbonate mixed salt raw ore is ground, and the rod is ground to -100 mesh and accounts for 60% of the fineness. The grinding medium is a co-saturated mother liquor of potassium chloride, sodium chloride, lithium carbonate and sodium carbonate mixed salt. The mass concentration of the grinding ore is 60%, and the pulp material is obtained;

[0032] (2) Separation of lithium carbonate from potassium chloride and sodium chloride: The pulp material obtained in step (1) is sent to the flotation machine, and the collector 120g / t raw ore of octadecylamine hydrochloride is added. selection, the flotation time is 3min, and the flotation temperature is 22°C to obtain lithium carbonate roughing concentrate;

[0033]...

Embodiment 2

[0037] The present embodiment extracts the method for lithium carbonate from the mixed salt of carbonate and chloride salt, comprises the following steps:

[0038] (1) Grinding: the Li-containing brine obtained by evaporation of brine + 0.95%, K + 11.51%, Na + 24.83%, CO 3 2- 7.12%, Cl - 45.09%, SO 4 2- The 0.13% lithium carbonate mixed salt raw ore is ground, and the rod is ground to -100 mesh and accounts for 78% of the fineness. The grinding medium is a co-saturated mother liquor of potassium chloride, sodium chloride, lithium carbonate and sodium carbonate mixed salt. The mass concentration of the grinding ore is 55%, and the pulp material is obtained;

[0039] (2) Separation of lithium carbonate from potassium chloride and sodium chloride: The pulp material obtained in step (1) is sent to the flotation machine, and the collector stearylamine hydrochloride 150g / t raw ore is added. selection, the flotation time is 3min, and the flotation temperature is 25℃ to obtain...

Embodiment 3

[0044]The raw material used in this example is the Li-containing material obtained by drying in the salt field. + 0.105%, K + 13.59%, Na + 23.17%, CO 3 2- 3.23%, Cl - 42.87%, SO 4 2- 2.677% lithium carbonate mixed salt raw ore.

[0045] The present embodiment extracts the method for lithium carbonate from the mixed salt of carbonate and chloride salt, comprises the following steps:

[0046] (1) Grinding: the Li-containing + 0.105%, K + 13.59%, Na + 23.17%, CO 3 2- 3.23%, Cl - 42.87%, SO 4 2- 2.677% lithium carbonate mixed salt raw ore is ground, rod-ground to a fineness of -100 mesh accounting for 20%, and the grinding medium is a co-saturated mother liquor of potassium chloride, sodium chloride, lithium carbonate and sodium carbonate mixed salt, The mass concentration of the grinding ore is 55%, and the pulp material is obtained;

[0047] (2) Separation of lithium carbonate from potassium chloride and sodium chloride: The pulp material obtained in step (1) is ...

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Abstract

A method for extracting lithium carbonate from mixed salt of carbonate and chlorate comprises the following steps: (1) carrying out ore grinding on the mixed salt of potassium chloride, sodium chloride, lithium carbonate and sodium carbonate obtained by tedding in a salt pan or evaporating by other equipment to obtain an ore pulp material; (2) the ore pulp material is fed into a flotation machine, a lithium carbonate collecting agent is added, flotation is conducted, and flotation froth lithium carbonate roughing concentrate is obtained; (3) the lithium carbonate roughing concentrate is subjected to concentration, an inhibitor is added before concentration and foam scraping, and lithium carbonate concentrate is obtained after concentration is completed; and (4) washing, filtering and drying the lithium carbonate concentrate to obtain a crude lithium carbonate product. The method is low in energy consumption, simple in process, high in lithium resource utilization rate and low in cost, the content of lithium carbonate in the obtained lithium carbonate product reaches 98% or above, and high-purity lithium carbonate can be effectively extracted from the extremely-low-lithium-grade lithium carbonate mixed salt.

Description

technical field [0001] The invention relates to a method for extracting lithium carbonate from carbonate-type salt lake brine, in particular to a method for extracting lithium carbonate from a mixed salt of carbonate and chloride salt obtained after the carbonate-type salt lake brine is sun-dried Methods. Background technique [0002] Lithium is an important strategic resource. It is widely used in emerging fields such as batteries, ceramics, glass, aluminum, lubricants, refrigerants and nuclear industries. It is an indispensable and important raw material for modern high-tech products. The development and production of lithium products directly affect the development of new industrial technologies to a certain extent, and the level of its consumption marks the development level of a country's high-tech industry. [0003] my country is rich in lithium resources, mainly distributed in the salt lakes of Qinghai and Tibet. Qinghai Salt Lake's lithium resource reserves account...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/018B03B7/00B03B9/00C01D15/08B03D101/02B03D101/06B03D103/04
CPCB03D1/018B03B7/00B03B9/00C01D15/08B03D2201/02B03D2201/06B03D2203/04
Inventor 胡勇甘顺鹏余俊季荣蒋世鹏艾自强邹娟杨清
Owner CHANGSHA DESIGN & RES INST OF CHEM IND MIN
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