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Lithium carbonate solar pond and lithium carbonate extraction method

An extraction method, lithium carbonate technology, applied in the direction of lithium carbonate; Ease of operation and reduction of production costs

Active Publication Date: 2021-09-03
INST OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned analysis, the present invention aims to provide a lithium carbonate solar pool and lithium carbonate extraction method, which solves the problem of CO in the prior art. 3 2- The concentration is low, the effect of sinking lithium is not good after heating up, Li + The problem of low lithium carbonate yield due to incomplete precipitation

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  • Lithium carbonate solar pond and lithium carbonate extraction method
  • Lithium carbonate solar pond and lithium carbonate extraction method

Examples

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Embodiment 1

[0054] A specific embodiment of the present invention discloses a lithium carbonate solar pool, mainly for extraction of lithium carbonate in the field, and the solar pool is built in the field salt lake area, see Figure 1 to Figure 2 , Lithium carbonate solar pool includes:

[0055] Tail brine pool 8, tail brine pool 8 is configured to accommodate the first Li + Concentration, the first CO 3 2- Concentration of tail brine;

[0056] A halogen pool 9, which is configured to accommodate the second Li + concentration, the second CO 3 2- Concentration of halides;

[0057] Analyze lithium pool 1, analyze lithium pool 1 and tail brine pool 8 and form halogen pool 9 and connect, to accommodate the first Li + The concentration of the tail halogen and the second Li + Mixed brine with a concentration of brine, and as a place for the precipitation of lithium carbonate mixed salt;

[0058] Among them, the first Li + concentration greater than the second Li + concentration, the...

Embodiment 2

[0083] Another specific embodiment of the present invention discloses a method for extracting lithium carbonate, the operation process is as follows Figure 4 Shown, lithium carbonate extraction method comprises the steps:

[0084] Step 1: The tail brine in the tail brine pool 8 and the brine formed in the brine forming pool 9 are mixed for brine, and the brine is poured into the lithium analysis pool 1 to obtain brine, wherein the Li in the tail brine + Concentration greater than Li in halide + Concentration, CO in Tail Brine 3 2- Concentration is less than CO in halide 3 2- concentration;

[0085] Step 2: Lay a freshwater layer on the surface of the brine, let it stand for several days, and make a salt gradient solar pond;

[0086] Step 3: When the salt gradient solar pool enters the stage of stable temperature rise and lithium analysis, monitor the Li in the brine of the lithium analysis layer (lower troposphere) at the bottom of the lithium analysis pool + Concentra...

example 1

[0097] High Li + low CO 3 2- The brine was taken from the tail brine in winter after lithium analysis in the G4 solar pool of a workshop in the Zabuye mining area of ​​Tibet. The sampling depth was 160cm. Li in the brine + The concentration is 1.93g / L, CO 3 2- The concentration is 25.44g / L, the brine temperature is 24.8°C, and the brine density is 1.233g / cm 3 . Low Li + High CO 3 2- The brine is taken from the 2# salt field of a workshop in Zabuye Mining Area, Tibet, where the brine is brine in summer, and the Li in the brine + The concentration is 1.69g / L, CO 3 2-The concentration is 53.52g / L, and the brine temperature is 12.0°C. The two are mixed according to the ratio of 1:1.25, 1:1.5 and 1:2, and the total volume of the brine is controlled to be 3000mL. After fully stirring, seal and place in a water bath for heating in a water bath at 40°C for a total of 42 hours. Use a suction filter to separate the solution from solid to liquid, dry and weigh the solid phas...

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Abstract

The invention discloses a lithium carbonate solar pond and a lithium carbonate extraction method, belongs to the technical field of lithium extraction, and solves the problems that the concentration of CO3 < 2-> in existing salt lake brine is relatively low, the lithium precipitation effect after heating is poor, and the lithium carbonate yield is relatively low due to incomplete precipitation of Li < + >. The lithium carbonate solar pond comprises a tail brine pond, a brine forming pond and a lithium separating pond, wherein brine in the lithium separating pond is mixed brine of the tail brine and the brine forming pond, the concentration of Li < + > in the tail brine in the tail brine pond is greater than the concentration of Li < + > in the brine forming pond, and the concentration of CO3 < 2-> in the tail brine in the tail brine pond is less than the concentration of CO3 < 2-> in the brine forming pond. According to the extraction method, tail brine in the tail brine pond and finished brine in the brine forming pond are mixed, the brine is poured into the lithium precipitation pond to prepare the salt gradient solar pond, and lithium carbonate is extracted when the salt gradient solar pond enters a stable temperature rise lithium precipitation stage. The lithium carbonate solar pond and the lithium carbonate extraction method can be used for extracting lithium carbonate in field salt lakes, and the yield of lithium carbonate is high.

Description

technical field [0001] The invention relates to the technical field of lithium extraction, in particular to a lithium carbonate solar pool and a lithium carbonate extraction method. Background technique [0002] In the Qinghai-Tibet Plateau region of my country, there are lithium salt lakes with extremely rich types and resource reserves, which have good development prospects. Zabuye Salt Lake, located in Zhongba County, Tibet, is the first example in my country to realize the industrialization of lithium extraction from salt lakes. It has been using the traditional method of raising temperature and analyzing lithium in solar pools for industrial production of lithium carbonate. [0003] However, judging from the actual production situation, the annual output of Zabuye has remained below 4,000 tons of industrial-grade lithium carbonate for many years, and it is difficult to reach and expand production. One of the main technical reasons is the lithium-rich brine poured into t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D15/08
CPCC01D15/08
Inventor 伍倩卜令忠余疆江乜贞王云生曾泰尼拉张科仁青罗布何志奎
Owner INST OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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