Clean production method of battery level lithium carbonate

A production method and technology of lithium carbonate, applied in lithium carbonate;/acid carbonate and other directions, can solve the problems of low product purity, long production cycle, cumbersome process, etc., and achieve simple process, low cost, The effect of strong process feasibility

Inactive Publication Date: 2013-05-08
阿坝中晟锂业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] Aiming at the deficiencies in the prior art that exist in the current production process of battery-grade lithium carbonate, such as cumbersome t

Method used

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  • Clean production method of battery level lithium carbonate
  • Clean production method of battery level lithium carbonate
  • Clean production method of battery level lithium carbonate

Examples

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Effect test

Embodiment 1

[0043] Embodiment 1 The clean production method of battery grade lithium carbonate of the present invention

[0044] The clean production method of battery grade lithium carbonate of the present invention comprises the steps:

[0045] (1) Preparation of β-spodumene lithium concentrate: Select 1000kg of enriched natural spodumene concentrate and place it in a rotary furnace, and control the temperature in the rotary furnace to roast at 1100°C for 5 hours to prepare β-spodumene Lithium concentrate;

[0046] (2) Lithium sulfate solution preparation: When the temperature of the rotary furnace is controlled at 95°C, the β-spodumene lithium concentrate is crushed and sieved to make ore powder, and an excess of 25% sulfuric acid solution is added to the ore powder to mix and then transferred to the rotary furnace Sinter at 270°C for 5 hours; pulverize the sintered ore powder and soak it with purified water to obtain a crude product solution, use calcium carbonate to neutralize exc...

Embodiment 2

[0050] Embodiment 2 Production method of battery grade lithium carbonate of the present invention

[0051] The clean production method of battery grade lithium carbonate of the present invention comprises the steps:

[0052] (1) Preparation of β-spodumene lithium concentrate: Select 1000kg of enriched natural spodumene concentrate and place it in a rotary furnace, and control the temperature in the rotary furnace to roast at 1150°C for 6 hours to prepare β-spodumene Lithium concentrate; under this condition, the α-spodumene in the ore is transformed into β-spodumene lithium concentrate.

[0053] (2) Lithium sulfate solution preparation: When the temperature of the rotary furnace is controlled at 100°C, the β-spodumene lithium concentrate is crushed and sieved to make ore powder, and an excess of 25% sulfuric acid solution is added to the ore powder to mix and then transferred to the rotary furnace Sinter at 250°C for 3 hours; pulverize the sintered ore powder and soak it wi...

Embodiment 3

[0057] Example 3 Production method of battery grade lithium carbonate of the present invention

[0058] The clean production method of battery grade lithium carbonate of the present invention comprises the steps:

[0059] (1) Preparation of β-spodumene lithium concentrate: Select 1000kg of enriched natural spodumene concentrate and place it in a rotary furnace, and control the temperature in the rotary furnace to roast at 1130°C for 6 hours to prepare β-spodumene Lithium concentrate;

[0060] (2) Lithium sulfate solution preparation: When the temperature of the rotary furnace is controlled at 110°C, the β-spodumene lithium concentrate is crushed and sieved to make ore powder, and an excess of 25% sulfuric acid solution is added to the ore powder to mix and then transferred to the rotary furnace Sinter at 300°C for 3.5 hours; pulverize the sintered ore powder and soak it with purified water to obtain a crude product solution, use calcium carbonate to neutralize excess sulfur...

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Abstract

The invention belongs to the field of inorganic chemistry and relates to a clean production method of a battery level lithium carbonate. According to the production method of the battery level lithium carbonate, spodumene is adopted as a raw material and the battery level lithium carbonate is obtained through five steps of preparing beta-spodumene lithium concentrate, preparing a lithium sulfate solution, removing ions, preparing lithium carbonate and then preparing the battery level lithium carbonate. According to the production method of the battery level lithium carbonate, a precipitator is directly added into the prepared lithium sulfate to remove metal ions in the lithium sulfate solution without the preparation of industrial lithium carbonate, so that the production cycle and the production cost of the battery level lithium carbonate are greatly reduced; and meanwhile, the production process is simple to operate, safe and environment-friendly. The product prepared by the production method of the battery level lithium carbonate disclosed by the invention is stable in quality and accordant with industrial standards of the battery level lithium carbonate and has important industrial popularization values.

Description

technical field [0001] The invention belongs to the field of inorganic chemistry, and in particular relates to a clean production method of battery-grade lithium carbonate. Background technique [0002] With the reduction of traditional energy sources such as oil, coal, and natural gas, it is increasingly urgent to find alternative energy sources and new energy sources. As a new energy source, lithium-ion battery is the most important product in battery products, and is widely used in mobile communications, watches, cameras, calculators, computer memory backup power, cardiac pacemakers, security alarms, electric vehicle power supplies and other fields. Battery-grade lithium carbonate is the main material for the production of energy storage batteries, and its application prospects are very broad. At present, the global lithium carbonate market capacity is 80,000-90,000 tons. According to statistics from the annual report of inorganic salts in Asia, the global demand for li...

Claims

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Application Information

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IPC IPC(8): C01D15/08
Inventor 杨春晖王运旭赵江张晓洪李朝红
Owner 阿坝中晟锂业有限公司
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