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Lithium preparing process with lithium carbonate

A lithium carbonate, purpose technology, applied in the field of metal smelting, can solve the problems of low product purity, large equipment investment and high product cost, and achieve the effects of high purity, less investment demand and low cost

Inactive Publication Date: 2004-04-07
黄启新
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Lithium metal is an important metal raw material in military industry and civilian use. The existing electrolytic lithium production method has a low product purity, only 97%-98%; it must be purified by multiple distillations before use, so its product cost In addition, the electrolytic lithium production method also has serious environmental pollution problems, that is, the chlorine gas produced in the electrolytic lithium production process will cause serious pollution to the environment; and the equipment investment of the electrolytic lithium production method is also relatively large

Method used

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  • Lithium preparing process with lithium carbonate
  • Lithium preparing process with lithium carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] ① According to lithium carbonate (Li 2 CO 3 ): quicklime (CaO): alumina (Al 2 o 3 ) = 0.8: 0.819: 0.256 by weight ratio and take powdery lithium carbonate with a purity greater than 99% and a particle size of less than 65 meshes, powdered quicklime with a purity greater than 96% and a particle size of less than 80 meshes and a powder with a purity greater than 98% and a particle size of less than 65 meshes Shaped alumina, and mix the three evenly;

[0027] ② Make the particle size n of the powdery mixture obtained in the previous step: n=10mm, and the specific gravity is 1.6g / cm 3 solid particles;

[0028] ③Use the rotary kiln to calcinate the solid particles obtained in the previous step at a temperature of 900°C until the lithium carbonate in the particles is completely decomposed, and the carbon dioxide contained in it is exhausted, and the calcined solid particles obtained are used for later use; the calcining process Must use pure heat source, can not use impu...

Embodiment 2

[0035] ① According to lithium carbonate (Li 2 CO 3 ): quicklime (CaO): alumina (Al 2 o 3 ) = 0.925: 0.8245: 0.258 by weighing the powdered lithium carbonate with a purity greater than 99% and a particle size less than 65 mesh, powdered quicklime with a purity greater than 96% and a particle size less than 80 mesh and powder with a purity greater than 98% and a particle size less than 65 mesh Shaped alumina, and mix the three evenly;

[0036] ② Make the particle size n of the powdery mixture obtained in the previous step: n=15mm, and the specific gravity is 1.8g / cm 3 solid particles;

[0037] ③Calcinate the solid particles obtained in the previous step at a temperature of 1000°C in a rotary kiln until the lithium carbonate in the particles is completely decomposed, and the carbon dioxide contained in it is exhausted, and the calcined solid particles obtained are used for later use; the calcining process Must use pure heat source, can not use impure heat source;

[0038] 4...

Embodiment 3

[0044] ① According to lithium carbonate (Li 2 CO 3 ): quicklime (CaO): alumina (Al 2 o 3 ) = 1.05: 0.83: 0.26 by weight ratio, respectively weighing the powdered lithium carbonate with a purity greater than 99% and a particle size of less than 65 meshes, powdered quicklime with a purity greater than 96% and a particle size of less than 80 meshes, and powders with a purity greater than 98% and a particle size of less than 65 meshes. Shaped alumina, and mix the three evenly;

[0045] ② Make the particle size n of the powdery mixture obtained in the previous step: n=20mm, and the specific gravity is 2g / cm 3 solid particles;

[0046] ③Calcinate the solid particles obtained in the previous step at a temperature of 1100°C in a rotary kiln until the lithium carbonate in the particles is completely decomposed, and the carbon dioxide contained in it is exhausted, and the calcined solid particles obtained are used for later use; the calcining process Must use pure heat source, can ...

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Abstract

The lithium preparing process with lithium carbonate includes the following steps: mixing lithium carbonate, lime and alumina in certain proportion; pelletizing the mixture; calcining the mixture pellet at 900-1100 deg.c for lithium carbonate to decompose completely and for contained CO2 to be exhausted completely; crushing the pellet; mixing the obtained powder and silicoferrite in certain ratio; pelletizing the mixture powder; reducing the pellet at 1500-1600 deg.c and vacuum degree lower than or equal to 30 pa to produce lithium vapor; condensation to obtain solid lithium. The present invention has the features of high product purity, low cost, less environmental pollution and less investment in apparatus.

Description

Technical field [0001] The invention relates to a method for metal smelting, in particular to a method for preparing lithium from lithium carbonate. Background technique [0002] Lithium metal is an important metal raw material in military industry and civilian use. The existing electrolytic lithium production method has a low product purity, only 97%-98%; it must be purified by multiple distillations before use, so its product cost In addition, the electrolytic lithium production method also has serious environmental pollution problems, that is, the chlorine gas produced in the electrolytic lithium production process will cause serious pollution to the environment; and the equipment investment of the electrolytic lithium production method is also relatively large. Contents of the invention [0003] The object of the present invention is to provide a kind of method that product purity is high, cost is low, environmental pollution is little, equipment investment is also les...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B26/12
Inventor 黄启新黄丽黄颖
Owner 黄启新
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