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Method for preparing lithium hydroxide by taking lithium-containing fluorination slag as raw material

A lithium hydroxide and lithium fluoride slag technology, applied in the direction of lithium oxide;/hydroxide, etc., can solve the problems of slow pulping rate, slow fusion rate of pulp and conversion agent, and reduced reaction rate

Inactive Publication Date: 2021-01-01
湖南金凯循环科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention patent with the Chinese patent number CN201811147698.4 discloses a method for preparing lithium hydroxide from lithium-containing fluoride slag. When it is used, the rate of pulping is slow, and the rate of fusion of pulp and conversion agent is slow. The speed of its reaction is reduced, and the effect of organic matter treatment in the lithium hydroxide after the reaction is poor in addition, and the purity of the lithium hydroxide that causes preparation is lower

Method used

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  • Method for preparing lithium hydroxide by taking lithium-containing fluorination slag as raw material

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Step 1, mixing the lithium-containing fluoride slag with a lithium content of 10%wt and water to make slurry, the ratio of solid to liquid is 1:12, and stirring by the first stirring device;

[0028] Step 2: Add the prepared slurry into the reactor, and insert barium hydroxide or calcium hydroxide into the reactor, the ratio of barium hydroxide or calcium hydroxide to lithium-containing fluoride slag is 1.5:10, and Stir by the second stirring device, the rotation speed of the second stirring device is 30r / s;

[0029] Step 3, filtering the reacted solution, filtering to obtain lithium hydroxide solution and filter residue, adding an alkaline reagent to the lithium hydroxide solution, and adjusting the pH of the lithium hydroxide solution to 11;

[0030] Step 4, add 60 purpose gacs to the lithium hydroxide solution, absorb the organic matter in the lithium hydroxide solution;

[0031] Step 5: Concentrate and crystallize the adsorbed lithium hydroxide solution three times...

Embodiment 2

[0033] Step 1, mixing the lithium-containing fluoride slag with a lithium content of 20%wt and water to make slurry, the ratio of solid to liquid is 1:18, and stirring by the first stirring device;

[0034] Step 2, add the prepared slurry into the reactor, and insert barium hydroxide or calcium hydroxide into the reactor, the ratio of barium hydroxide or calcium hydroxide to lithium-containing fluoride slag is 1.9:10, and Stirring by the second stirring device, the rotation speed of the second stirring device is 40r / s;

[0035] Step 3, filtering the reacted solution, filtering to obtain lithium hydroxide solution and filter residue, adding an alkaline reagent to the lithium hydroxide solution, and adjusting the pH of the lithium hydroxide solution to 12;

[0036] Step 4, adding 65 purpose gacs to the lithium hydroxide solution, absorbing the organic matter in the lithium hydroxide solution;

[0037] Step 5, the lithium hydroxide solution after adsorption is concentrated and c...

Embodiment 3

[0039] Step 1, mixing the lithium-containing fluoride slag with a lithium content of 25%wt and water to make slurry, the ratio of solid to liquid is 1:18, and stirring by the first stirring device;

[0040] Step 2: Add the prepared slurry into the reactor, and insert barium hydroxide or calcium hydroxide into the reactor, the ratio of barium hydroxide or calcium hydroxide to lithium-containing fluoride slag is 2.5:10, and Stir by the second stirring device, the rotation speed of the second stirring device is 45r / s;

[0041] Step 3, filtering the reacted solution, filtering to obtain lithium hydroxide solution and filter residue, adding an alkaline reagent to the lithium hydroxide solution, and adjusting the pH of the lithium hydroxide solution to 11;

[0042] Step 4, adding 68 purpose gacs to the lithium hydroxide solution, absorbing the organic matter in the lithium hydroxide solution;

[0043] Step 5: Concentrate and crystallize the adsorbed lithium hydroxide solution three...

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Abstract

The invention relates to the technical field of recycling of high-value waste resources, and concretely relates to a method for preparing lithium hydroxide by taking lithium-containing fluorination slag as a raw material. The method comprises the following steps: 1, adding water into the lithium-containing fluorination slag to prepare slurry; 2, adding the prepared slurry into a reactor, and enabling the slurry to react with a conversion agent in the reactor for 1-5h; 3, filtering to obtain a lithium hydroxide solution and filter residues; 4, removing organic matters in the lithium hydroxide solution by using activated carbon; and 5, dissolving lithium hydroxide, and carrying out concentration crystallization to obtain the lithium hydroxide. The lithium-containing fluorination slag and water are stirred through a first stirring device, so the pulping speed is increased; the slurry and the conversion agent can be stirred through a second stirring device, so the fusion speed is increased, the reaction time is prolonged, and the reaction efficiency is improved; and organic matter in a lithium hydroxide solution can be removed through activated carbon, so the purity of lithium hydroxide preparation is improved.

Description

technical field [0001] The invention relates to the technical field of recycling high-value waste resources, in particular to a method for preparing lithium hydroxide using lithium-containing fluoride slag as a raw material. Background technique [0002] As we all know, with the rapid development of the lithium battery industry and the steady progress of the traditional lithium industry, the consumption of lithium resources in my country is increasing year by year. Due to the limited life of the material itself, the recovery of lithium-containing resources is imminent. [0003] The invention patent with the Chinese patent number CN201811147698.4 discloses a method for preparing lithium hydroxide from lithium-containing fluoride slag. When it is used, the rate of pulping is slow, and the rate of fusion of pulp and conversion agent is slow. The rate of its reaction has been reduced, and the effect of organic matter treatment in the lithium hydroxide after the reaction is poor ...

Claims

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Application Information

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IPC IPC(8): C01D15/02
CPCC01D15/02C01P2006/80
Inventor 颜群轩颜群湘伍习飞唐莎
Owner 湖南金凯循环科技有限公司
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