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Preparation method of carbonyl iron powder special for magnetic grinding fluid

A carbonyl iron powder and grinding fluid technology is applied in the field of preparation of high-quality powder metallurgy raw materials, which can solve the problems of technology dependence on imports and high import costs, and achieve the effects of reducing impurity content, good sphericity, and reducing carbon content

Pending Publication Date: 2021-07-02
吉林卓创新材料有限公司
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The carbonyl iron powder is the grinding raw material of the liquid grinder, and it is one of the main consumables. The performance of the carbonyl iron powder plays a decisive role in the quality of the final grinding product. Before this technology has been limited to foreign countries, the technology relies on imports, and the cost of imports High, it is urgent to develop and innovate our own technology to reduce production costs, optimize grinding effect, and increase the service life of grinding fluid

Method used

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Examples

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Effect test

preparation example Construction

[0019] A method for preparing carbonyl iron powder special for magnetic grinding fluid, using ammonia gas as the carrier gas in the decomposition process, the method comprises the following steps:

[0020] S1. Inject the carbonyl iron liquid into the evaporator and heat it to vaporize it into carbonyl iron vapor;

[0021] S2. Fill the evaporator with ammonia gas regularly and quantitatively, and fully mix with carbonyl iron vapor;

[0022] S3. The mixed gas is delivered to the decomposer through pressure, and the decomposition temperature is controlled to be divided into four stages of temperature;

[0023] S4. The mixed gas is decomposed in the decomposer under the control of different temperature stages to obtain carbonyl iron powder;

[0024] S5. The carbonyl iron powder enters the heat treatment zone to remove residual ammonia in the carbonyl iron powder;

[0025] S6. Screening powders with particle sizes that meet the requirements, and mixing them uniformly to obtain ca...

Embodiment 1

[0032] A method for preparing carbonyl iron powder special for magnetic grinding fluid, using ammonia gas as the carrier gas in the decomposition process, the method comprises the following steps:

[0033] S1. Inject the carbonyl iron liquid into the evaporator and heat it to vaporize it into carbonyl iron vapor with an evaporation rate of 40L / h;

[0034] S2. Fill the evaporator with ammonia gas 2Nm regularly and quantitatively 3 / h, and fully mixed with carbonyl iron vapor;

[0035] S3. The mixed gas is transported to the decomposer through pressure, and the decomposition temperature is controlled to be divided into four sections: the first section is 300°C, the second section is 320°C, the third section is 330°C, and the fourth section is 340°C;

[0036] S4. The mixed gas is decomposed in the decomposer under the control of different temperature stages to obtain carbonyl iron powder;

[0037] S5. The carbonyl iron powder enters the heat treatment zone to remove residual am...

Embodiment 2

[0040] A method for preparing carbonyl iron powder special for magnetic grinding fluid, using ammonia gas as the carrier gas in the decomposition process, the method comprises the following steps:

[0041] S1. Inject the carbonyl iron liquid into the evaporator, and heat it to vaporize it into carbonyl iron vapor, and the evaporation rate is 50L / h;

[0042] S2. Fill the evaporator with ammonia gas 2.2Nm regularly and quantitatively 3 / h, and fully mixed with carbonyl iron vapor;

[0043] S3. The mixed gas is transported to the decomposer through pressure, and the decomposition temperature is controlled to be divided into four stages: the first stage is 310°C, the second stage is 325°C, the third stage is 335°C, and the fourth stage is 345°C;

[0044] S4. The mixed gas is decomposed in the decomposer under the control of different temperature stages to obtain carbonyl iron powder;

[0045] S5. The carbonyl iron powder enters the heat treatment zone to remove residual ammonia ...

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Abstract

The invention provides a preparation method of special carbonyl iron powder for a magnetic grinding fluid. A process is improved and optimized in the aspects of split hardness, particle size distribution, impurity content and the like, and nitrogen serves as carrier gas for decomposition of carbonyl iron; the impurity content in the carbonyl iron machining process is reduced, and meanwhile the carbon content in the carbonyl iron powder is reduced; it can be ensured that the obtained carbonyl iron powder particles are regular and good in sphericity degree, and the carbonyl iron powder with excellent grinding performance is finally obtained by screening the carbonyl iron powder particles in proper particle sizes to meet the use requirements of the grinding industry.

Description

technical field [0001] The invention relates to the field of preparation of high-quality powder metallurgy raw materials, in particular to a preparation method of carbonyl iron powder special for magnetic grinding fluid. Background technique [0002] In recent years, people's requirements for all aspects of applied materials have gradually increased, and the requirements for surface polishing technology during material processing have also become higher and higher, resulting in some traditional processing techniques that can no longer meet production needs. In this context, liquid grinding machine emerged as a new type of processing technology. It broke the traditional way of mechanical grinding and polishing, and used liquid to grind and polish the workpiece, so as to produce products with smoother surface. The carbonyl iron powder is the grinding raw material of the liquid grinder, and it is one of the main consumables. The performance of the carbonyl iron powder plays a d...

Claims

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Application Information

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IPC IPC(8): B22F9/30B22F1/00
CPCB22F9/305B22F1/052B22F1/065
Inventor 唐思琪刘文兴李杨李欣欣邵金玲
Owner 吉林卓创新材料有限公司
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