Lithium extraction system and lithium extraction method for salt lake brine
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A salt lake brine and brine technology, applied in the direction of lithium carbonate;/acid carbonate, etc., can solve problems such as unstable product quality, improve batch qualification, reduce product cost, and improve quality stability Effect
Pending Publication Date: 2021-05-28
CHINA ENFI ENGINEERING CORPORATION
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[0005] The main purpose of the present invention is to provide a lithium extraction system and method for extracting lithium from salt la
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Embodiment 1
[0051]Lithium-rich brine (Li) after natural settlement and homogenization in the buffer unit 04 and stores for a certain period of time (Li+>15g / L), the composition of the lithium-rich brine is shown in Table 1, and the lithium-rich brine is continuously injection magnesium according to the continuous magnesium equipment 01. Specifically, lithium-rich brine after the buffer homogenization is 30% by weight. The sodium hydroxide solution (in a haze-controlled flow rate manner) is continuously laminarized in three consecutive median grooves 015 of the continuous median device 011 (temperature 95 ° C) to obtain first Slurry; pump the first slurry into the first continuous settling device 012 to carry out the first settling separation (anionic polyacrylamide, 200 mg / kg of anionic polyacrylamide and diatomide, diatomaceous earth adding amount of 0.5 ~ 1%) The first bottom flow and the first overflow are obtained; the first substrate is performed, and the first bottom stream is first f...
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Abstract
The invention provides a lithium extraction system and a lithium extraction method for salt lake brine. The lithium extraction system comprises continuous magnesium removal equipment, continuous lithium precipitation equipment and continuous washing equipment; the continuous magnesium removal equipment is used for carrying out continuous magnesium removal treatment on lithium-rich brine by adopting a sodium hydroxide solution to obtain magnesium-removed liquid and magnesium slag; the continuous lithium precipitation equipment is connected with the continuous magnesium removal equipment and is used for carrying out continuous lithium precipitation treatment on the magnesium-removed liquid to obtain crude lithium carbonate and lithium precipitation mother liquor; and the continuous washing equipment is connected with the continuous lithium precipitation equipment and is used for continuously washing the crude lithium carbonate to obtain a lithium carbonate solid. According to the lithium extraction system creatively adopting the salt lake brine, the integrated lithium extraction system can achieve continuous production, so that the labor intensity is remarkably reduced, the product difference caused by subjective distinguishing of manual control is reduced, the quality stability of the product is improved, the product cost is reduced, and the batch qualification of lithium carbonate products is improved.
Description
Technical field[0001]The present invention relates to the field of salt lake, and in particular, in particular, a lithium-lithium-lithium-lithium-lithium-lithium-lithium-lithium-lithium-lithium-lithium-lithium release system.Background technique[0002]Salt Lake Brine is currently one of the main raw materials of lithium, accounting for 66% of the world's lithium resource reserves, and the other is a lithium ore, a granite rock type. Global lithium salt lags, sulfate (sodium sulfate subtype, magnesium sulfate subtype) and chloride type 3 type, distribution extremely uneven, mainly located in South American Andean (Argentina, Bolivia, Chile), China's Qinghai-Tibet Plateau and Nahada, North America.[0003]Foreign lake is low, and the lithium can be lithium, which can be used to lithium, relatively simple, and the product quality is stable. However, my country's rich saline lagge mg / li is relatively high, much higher than 8.0 of Bolivia, Ulino Lake, Bolivia, is difficult to lithium, hig...
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