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Method for extracting lithium from clay containing lithium

A clay and leaching solution technology, applied in the field of lithium-containing clay extraction, can solve the problem of lack of universality, and achieve the effects of avoiding a large amount of limestone, simple impurity removal, and reducing high prices.

Pending Publication Date: 2020-11-06
GANFENG LITHIUM CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is only aimed at the specific technical difficulties of lithium deposits like the Guizhou sedimentary type, and is not universal

Method used

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  • Method for extracting lithium from clay containing lithium
  • Method for extracting lithium from clay containing lithium

Examples

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Effect test

Embodiment 1

[0044]Take 500ml of water, add 40g Na2SO4, 40gK2SO4 to make a solution, then add 200g of ground clay and 40g of CaCO3, stir and filter evenly to obtain 440g of clay mixture, knead into balls manually, roast at 1000°C for 1.5h, cool and grind to P100 150um, 205 g of powder are obtained. Add 400ml of water and stir for 40min, then filter to obtain 330ml of clay extract and 184g of clay residue.

Embodiment 2

[0046] Take 500ml of water, add 60g Na2SO4, 40gK2SO4 to make a solution, then add 200g of ground clay and 40g of CaCO3, stir and filter evenly to obtain 460g of clay mixture, knead into balls manually, roast at 900°C for 2 hours, cool and grind to P100 125um to get 209g powder. Add 400ml of water and stir for 50min, then filter to obtain 350ml of clay extract and 186g of clay residue.

Embodiment 3

[0048] Take 150ml of water, add 50g Na2SO4, 40gK2SO4, then add 200g of ground clay and 40g of CaCO3 to obtain 470g of clay mixture, knead into balls, roast at 950°C for 2h, cool and grind to P100 150um to obtain 210g of powder. Add 400ml of water and stir for 40min, then filter to obtain 300ml of clay extract and 200g of clay residue.

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Abstract

The invention provides a method for extracting lithium from clay containing lithium. The method for extracting the lithium from the clay containing the lithium includes the steps that (1) the clay containing the lithium, calcium carbonate, sodium sulfate, and potassium sulfate are mixed to obtain a paste after adding water; (2) the paste is ground to obtain a ground material; (3) the ground material is made into a plurality of spherical materials; (4) the spherical materials are put into a furnace and roasted to obtain a roasted material; (5) the roasted material is crushed to obtain a crushedmaterial; (6) the crushed material and pure water are mixed and stirred for leaching to obtain a leached solution; (7) the leached solution is filtered to obtain a clay leached solution. The method for extracting the lithium from the clay containing the lithium fires the clay containing the lithium, the calcium carbonate, the sodium sulfate, and the potassium sulfate in a certain proportion, which is simple in technique, low in cost, high in recovery of the lithium, simple in impurity removal and no pollution in later stages.

Description

technical field [0001] The invention relates to the chemical production field of lithium resource mining, in particular to a method for extracting lithium from lithium-containing clay. Background technique [0002] At present, there are few methods and researches on extracting lithium from lithium-containing clay. Because the structure and properties of lithium-containing clay are different from those of spodumene and lepidolite, and the lithium content of lithium-containing clay is lower than that of spodumene, the commonly used The method of extracting lithium from ore is not suitable for lithium-containing clay, and it is difficult to extract lithium from lithium-containing clay. [0003] For example, the Henan Provincial Rock and Mineral Testing Center has invented a method of "modified roasting-heap leaching" to extract lithium from low-grade clay. The low-grade clay and roasting auxiliary materials are roasted, and the mass ratio is lithium-containing clay ore: calc...

Claims

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Application Information

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IPC IPC(8): C22B26/12C22B1/24C22B1/02C22B3/04
CPCC22B26/12C22B1/2406C22B1/02C22B3/04Y02P10/20
Inventor 李良彬陈超郁兴国彭琴艾刚华王彬付晓春高贵彦周峰朱志全肖成廖海林亮陈荣华何文琪李晶钱攀杨斌愚
Owner GANFENG LITHIUM CO LTD
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