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Preparation method of superfine and highly-dispersed spherical cobalt carbonate

A cobalt carbonate and high technology, applied in the field of preparation of spherical cobalt carbonate, can solve the problems of large particle size and poor dispersion performance of cobalt carbonate, and achieve the effects of high degree of dispersion, good sphericity and uniform particle size distribution

Pending Publication Date: 2021-08-24
JINGMEN GEM NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide a method for preparing ultrafine and highly dispersed spherical cobalt carbonate, which solves the problem of poor dispersion of cobalt carbonate prepared by the prior art and large particle size due to partial agglomeration. question

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  • Preparation method of superfine and highly-dispersed spherical cobalt carbonate
  • Preparation method of superfine and highly-dispersed spherical cobalt carbonate
  • Preparation method of superfine and highly-dispersed spherical cobalt carbonate

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preparation example Construction

[0034] A kind of preparation method of ultrafine and highly dispersed spherical cobalt carbonate provided by the present embodiment, the method comprises the following steps:

[0035] S1, to 20m 3 Add 3900-4500L of cobalt chloride solution with a concentration of 100-150g / L into the reaction kettle and maintain the temperature of the cobalt salt solution at 20-25°C; the cobalt salt solution is at least one of cobalt chloride, cobalt nitrate and cobalt sulfate. One, preferably cobalt chloride;

[0036] S2. The first feeding stage: Add the ammonium bicarbonate solution with a concentration of 200-300g / L to the reaction kettle in S1 at a flow rate of 5500-6500L / h at a stirring rate of 500-800rpm, and adjust the carbon The flow rate of the ammonium solution controls the mass ratio of ammonium bicarbonate to cobalt metal to be 2.80 to 3.05, and after continuing the reaction for 1 to 2 hours, stop feeding,

[0037] Heating stage: the temperature of the system is raised to 45-65°C ...

Embodiment 1

[0043] A kind of preparation method of ultrafine and highly dispersed spherical cobalt carbonate provided by the present embodiment, the method comprises the following steps:

[0044] S1, to 20m 3 Add 4200L of cobalt chloride solution with a concentration of 120g / L to the reaction kettle and maintain the temperature of the cobalt salt solution at 20-25°C;

[0045]S2. The first feeding stage: Add the ammonium bicarbonate solution with a concentration of 250g / L to the reactor in S1 at a flow rate of 5500-6500L / h at a stirring rate of 650rpm, and adjust the flow rate of the ammonium bicarbonate solution Control the mass ratio of ammonium bicarbonate and cobalt metal to be 2.80~3.05, after continuing to react for 1~2h, stop feeding,

[0046] Heating stage: while maintaining the constant stirring rate, raise the temperature of the system to 55°C at a heating rate of 0.2-0.25°C / min;

[0047] The second feeding stage: reduce the stirring rate of the system to 200rpm and continue to...

Embodiment 2

[0053] A kind of preparation method of ultrafine and highly dispersed spherical cobalt carbonate provided by the present embodiment, the method comprises the following steps:

[0054] S1, to 20m 3 Add 3900L of cobalt chloride solution with a concentration of 100g / L to the reaction kettle and maintain the temperature of the cobalt salt solution at 20-25°C;

[0055] S2. The first feeding stage: Add the ammonium bicarbonate solution with a concentration of 200g / L to the reactor in S1 at a flow rate of 5500-6500L / h at a stirring rate of 500rpm, and adjust the flow rate of the ammonium bicarbonate solution Control the mass ratio of ammonium bicarbonate and cobalt metal to be 2.80~3.05, after continuing to react for 1~2h, stop feeding,

[0056] Heating stage: while maintaining the constant stirring rate, raise the temperature of the system to 45°C at a heating rate of 0.2-0.25°C / min;

[0057] The second feeding stage: reduce the stirring rate of the system to 100rpm and continue t...

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Abstract

The invention belongs to the technical field of cobalt carbonate preparation, and discloses a preparation method of superfine and highly-dispersed spherical cobalt carbonate. The method comprises the following steps: adding a cobalt salt solution into a reactor, and maintaining the temperature of the cobalt salt solution at 20-25 DEG C; adding ammonium bicarbonate into a reactor containing cobalt salt for a precipitation reaction through the technological process of a first feeding stage, a heating stage and a second feeding stage, thereby preparing a slurry finished product, namely the superfine spherical cobalt carbonate slurry finished product is prepared; and finally, carrying out stirring washing and flash evaporation drying to successfully prepare the superfine and high-dispersion spherical cobalt carbonate. According to the preparation method disclosed by the invention, the superfine spherical cobalt carbonate which is good in sphericity degree, high in dispersity and 0.5-0.9 mu m in particle size D50 can be produced on a large scale in batches.

Description

technical field [0001] The invention belongs to the technical field of cobalt carbonate preparation, and in particular relates to a preparation method of ultrafine and highly dispersed spherical cobalt carbonate. Background technique [0002] With the rapid development of my country's economy, the cemented carbide field required for civil shield machines and cutting machines tends to be localized, but the material requirements for cemented carbide are becoming more and more stringent, and the quality of cobalt powder has a great impact on alloys. The high-end cobalt powder required by international mainstream customers has been monopolized by Japanese and European companies. Domestic fine cobalt powder is being valued by leading domestic companies. Cobalt carbonate manufacturers currently on the market must enter the world's first-class supply In the field of commerce, high-quality products have uneven appearance (rod, flake, snowflake, etc.), wide particle size distribution, ...

Claims

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Application Information

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IPC IPC(8): C01G51/06
CPCC01G51/06C01P2004/32C01P2004/62C01P2004/61C01P2004/51Y02E60/10
Inventor 许开华蒋振康刘文泽易全瑞
Owner JINGMEN GEM NEW MATERIAL