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A kind of preparation method of micron spherical iron powder

A micron-scale, spherical technology, applied in the field of powder metallurgy, can solve the problems of high production cost, large equipment investment, complex production process, etc., and achieve the effect of less impurities, reduced environmental load, and high-quality products

Active Publication Date: 2019-05-21
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the production method of spherical iron powder, although the hydroxyl method and the atomization method have been practically applied, there are problems such as complex production process, large equipment investment, and high production cost.

Method used

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  • A kind of preparation method of micron spherical iron powder
  • A kind of preparation method of micron spherical iron powder
  • A kind of preparation method of micron spherical iron powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A preparation method of micron-sized spherical iron powder, specifically comprising the following steps:

[0048] Step 1, ultra-pure iron concentrate powder pretreatment

[0049] Sieve the ultra-pure iron concentrate powder to obtain ultra-pure iron concentrate powder with a particle size of 20-40 μm, and then put it into a drying oven for drying at a drying temperature of 130°C and a drying time of 3 hours until the ultra-pure iron concentrate powder The mass percentage of water in the ore powder is less than 1%, and the dried ultra-pure iron ore concentrate powder is obtained;

[0050] Step 2, Quick Restore

[0051] (1) use figure 1 The experimental device shown in the figure performs rapid reduction, and the reducing gas B containing methane and the dried ultra-pure iron concentrate powder A are passed into the conveying reactor 1, and the reducing gas B containing methane and the ultra-pure iron concentrate powder A are conveyed The furnace tube 1-1 of the reacto...

Embodiment 2

[0061] A preparation method of micron-sized spherical iron powder, specifically comprising the following steps:

[0062] Step 1, ultra-pure iron concentrate powder pretreatment

[0063] Sieve the ultra-pure iron concentrate powder to obtain ultra-pure iron concentrate powder with a particle size of 20-40 μm, and then put it into a drying oven for drying at a drying temperature of 130°C and a drying time of 3 hours until the ultra-pure iron concentrate powder The mass percentage of water in the ore powder is less than 1%, and the dried ultra-pure iron ore concentrate powder is obtained;

[0064] Step 2, Quick Restore

[0065] (1) use figure 1 The experimental device shown in the figure performs rapid reduction, and the reducing gas B containing methane and the dried ultra-pure iron concentrate powder A are passed into the conveying reactor 1, and the reducing gas B containing methane and the ultra-pure iron concentrate powder A are conveyed The furnace tube 1-1 of the reacto...

Embodiment 3

[0073] A preparation method of micron-sized spherical iron powder, specifically comprising the following steps:

[0074] Step 1, ultra-pure iron concentrate powder pretreatment

[0075] Sieve ultra-pure iron ore concentrate powder to obtain ultra-pure iron ore concentrate powder with a particle size of 65-71.4 μm, and then put it into a drying oven for drying at a drying temperature of 150°C and a drying time of 2 hours until the ultra-pure iron ore powder The mass percentage of water in the concentrate powder is less than 1%, and the dried ultra-pure iron concentrate powder is obtained;

[0076] Step 2, Quick Restore

[0077] (1) use Figure 4 The experimental device shown in the figure performs rapid reduction, and the reducing gas B containing methane and the dried ultra-pure iron concentrate powder A are passed into the conveying reactor 1, and the reducing gas B containing methane and the ultra-pure iron concentrate powder A are conveyed The furnace tube 1-1 of the rea...

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Abstract

The invention discloses a method for preparing micron-sized spherical iron powder, which belongs to the technical field of powder metallurgy. The method is as follows: after the ultra-pure iron concentrate powder is sieved and dried, it is fed into the transport reactor with the reducing gas containing methane, and the ultra-pure iron concentrate powder is quickly reduced in the high temperature zone of the transport reactor, and the reduction temperature is 1200~ 1600℃, the reduction time is 1-50s, iron-carbon molten droplets are obtained after reduction, and the iron-carbon molten droplets cool down rapidly when passing through the cooling zone of the transport reactor, and solidify to form spherical iron-carbon alloy powder; collect spherical iron-carbon alloy powder; send into a fluidized bed for a secondary fine reduction process to obtain micron-sized spherical iron powder with a metallization rate ≥ 99%. The method shortens the reaction time, is easy to operate, and effectively produces micron-sized spherical iron powder with high sphericity, low oxygen content, narrow product particle size distribution, and is not easily oxidized.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a preparation method of micron-sized spherical iron powder. Background technique [0002] Powder metallurgy is a technology that uses the mixture of metal powder and non-metal powder as raw material to obtain various materials and products through compression molding, sintering and subsequent treatment. It is a rapidly developing emerging technology. As the main raw material of iron-based powder metallurgy, iron powder is the most used type of powder in powder metallurgy. With the advancement of technology, iron powder has been developed and applied in metallurgy, chemical industry, electronics, magnetic material sensors, etc. At the same time, higher requirements are placed on the quality of the powder. As a high-performance metal powder, spherical iron powder is mainly used in advanced technologies such as metal additive manufacturing and injection moldin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/22
CPCB22F9/22B22F1/065
Inventor 汪兴楠储满生付贵勤唐钰朱苗勇
Owner NORTHEASTERN UNIV LIAONING