Method for directly producing environment-friendly lithium hydroxide monohydrate from spodumene

A spodumene, environmentally friendly technology, applied in the direction of lithium oxide;/hydroxide, etc., can solve the problems of no pollution, damage, etc., and achieve the effect of good fluidity and crystal enlargement
CN102838140BActive Publication Date: 2014-03-12SICHUAN GUORUN NEW MATERIAL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SICHUAN GUORUN NEW MATERIAL
Publication Date
2014-03-12

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Abstract

The invention discloses a method for directly producing environment-friendly lithium hydroxide monohydrate from spodumene. The method includes (1) calcining: calcining 80-200 mesh spodumene powder under high temperature; (2) ball-milling: ball-milling the calcined spodumene to 200 mesh; (3) acidifying: mixing the milled spodumene with concentrated sulfuric acid, introducing into an acidification kiln, and acidifying at 200-300 DEG C; (4) leaching: mixing the acidified mineral powder with washing water in subsequent step to prepare pulp, and regulating pH value with calcium carbonate heavy. The environment-friendly lithium hydroxide has no air pollution, and no influence on application quality. Fine dust of the environment-friendly lithium hydroxide is adsorbed through a novel activator (alkane or cycloalkane), to agglomerate dust, cut off dust source, remove irritant odor of original product, and solve human body damage problem caused by original product.
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Description

technical field

[0001] The invention relates to the technical field of mineral smelting technology, in particular to using spodumene to directly produce environment-friendly LiOH·H 2 O's method. Background technique

[0002] Lithium is a rare metal. Due to its unique physical and chemical properties, it has been widely used in military, chemical, optical, grease, refrigeration and other fields. It has the reputation of "energy metal". There are three ways to refine lithium: the first is extraction from spodumene; the second is extraction from lepidolite; the third is extraction from salt lake brine. In the prior art, there are mainly two methods for extracting lithium from spodumene: one is called the alkali method, which uses the spodumene-limestone method to produce lithium hydroxide monohydrate; the other is called the acid method, That is, lithium sulfate is produced by spodumene-sulfuric acid method, and lithium hydroxide monohydrate is produced after causticizati...

Claims

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