Method for producing spherical cobalt carbonate by continuous process

A cobalt carbonate, continuous process technology, applied in the direction of cobalt carbonate, can solve the problems of low production efficiency, can only be produced in batches, and many process steps, and achieve good spheroidization, good crystal nucleus structure consistency, and production. Efficient effect

Inactive Publication Date: 2011-02-16
ANHUI ALAND NEW ENERGY MATERIALS
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Its shortcoming is that it has many process steps, can only be produced in batches, cannot be produced continuously, and the production efficiency is not high

Method used

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  • Method for producing spherical cobalt carbonate by continuous process
  • Method for producing spherical cobalt carbonate by continuous process
  • Method for producing spherical cobalt carbonate by continuous process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] figure 1 Shown is a kind of continuous method production spherical cobalt carbonate method, comprises the following steps:

[0025] a. prepare cobalt sulfate solution;

[0026] Add 1.5m to the preparation tank 3 Open the preparation tank to stir, put a certain amount of cobalt sulfate into the preparation tank, and replenish water to 3.5m 3 After stirring for one hour, the cobalt salt was fully dissolved and then sampled for testing, and the cobalt concentration was pumped into the cobalt sulfate solution storage tank when the cobalt concentration was 80 ± 5g / L;

[0027] b. Preparation of ammonium bicarbonate solution

[0028] Add 1.5m to the preparation tank 3 Open the preparation tank to stir, slowly put a certain amount of ammonium bicarbonate into the preparation tank, add water to 3.5m after finishing cobalt sulfate 3 After stirring for one hour, the ammonium bicarbonate was fully dissolved and then sampled for testing. When the ammonium bicarbonate concentrat...

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Abstract

The invention discloses a method for producing spherical cobalt carbonate by a continuous process, which comprises the following steps of: a, preparing a cobaltous sulfate solution; b, preparing an ammonium hydrogen carbonate solution; c, carrying out a synthesis reaction; d, ageing and washing; e, drying; and f, packaging, wherein the synthesis reaction is carried out for realizing continuous production under the process condition that temperature is 50+ / -2DEG C, pH value is controlled to be 7.9-8.1, alkalinity is 20+ / -2g / L, solid content is controlled to be 120+ / -10g / L and stirring rotating speed is 80-100r / min. By adopting the continuous production process, the production efficiency is high; and the produced cobalt carbonate has good globulation and excellent consistence of a crystal nucleus structure.

Description

[technical field] [0001] The present invention relates to the production method of spherical cobalt carbonate, in particular to a method for producing spherical cobalt carbonate with a continuous process. [Background technique] [0002] With people's attention to energy utilization and the improvement of environmental protection awareness, secondary batteries have developed rapidly, especially lithium-ion batteries have achieved considerable development, among which lithium cobalt oxide lithium-ion battery technology is the most mature. The production of cobalt carbonate, the positive electrode material precursor of lithium cobaltate lithium ion battery, restricts the development of lithium cobaltate lithium ion battery. The sphericity of cobalt carbonate and whether the particles are uniform directly affect the electrical properties of lithium cobaltate. Cobalt carbonate with high density and particle uniformity is the prerequisite for the preparation of high-performance li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/06
Inventor 李世辉王大伟鲁海春王锡芬胡昔成孙卫华
Owner ANHUI ALAND NEW ENERGY MATERIALS
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