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Method for producing sand-blasting iron powder

A production method and technology of iron powder, applied in the field of sandblasting materials, can solve the problems of large water consumption, power consumption, large cooling water, etc., and achieve the effect of expanding the application range, easy implementation, and simple process

Inactive Publication Date: 2008-05-21
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages: 1. Steel blocks are used as raw materials, and the price is high, resulting in increased production costs; 2. To cool the atomized steel particles from a high temperature of 1600 ° C to normal temperature, a large amount of cooling water is required, and a large amount of water resources are consumed ; 3. Melting the steel block consumes electricity
In short, the production of sandblasting iron powder in this way requires high energy consumption and high cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) The components and weight percentages are: Fe: 97%, C: 0.65%, S: 0.024%, the rest are unavoidable impurities, and the bulk density is 2.6g / cm 3 The reduced iron powder is sieved for the second time on a double-layer vibrating sieve with a diameter of 1.5 meters (a sieve with an upper aperture of 220 μm and a lower sieve with an aperture of 140 μm). , and then sieve the iron powder with a particle size (D) of 220 μm to 140 μm for a second sieve, and the second sieve feed rate is about 1000 kg / hour for particle size screening. Particle size is represented by particle size D: D≥250μm is zero, D: 250~180μm: 24.1%, D: 180~150μm: 61.8%, D≤150μm: 14.1%;

[0027] 2) Carry out dense processing: use FL500 high-speed pulverizer to carry out compact processing, and control the feeding amount at about 700 kg / hour, and the loose packing density of reduced iron after compact processing is 3.9g / cm 3 ;

[0028] 3) Particle size screening again: Screening is still carried out on a d...

Embodiment 2

[0037] 1) The components and weight percentages are: Fe: 97.5%, C: 0.6%, S: 0.024%, the rest are unavoidable impurities, and the bulk density is 2.7g / cm 3 The reduced iron powder is sieved for the second time on a double-layer vibrating sieve with a diameter of 1.5 meters (a sieve with an upper aperture of 220 μm and a lower sieve with an aperture of 140 μm). , and then sieve the iron powder with a particle size D of 220 μm to 140 μm for the second sieving, and the second sieving feed rate is about 1000 kg / hour for particle size screening. Particle size is represented by particle size D: D≥250μm is zero, D: 250~180μm: 23.4%, D: 180~150μm: 62.9%, D≤150μm: 13.7%;

[0038] 2) Carry out dense processing: use FLS00 high-speed pulverizer to carry out compact processing, and control the feeding amount at about 700 kg / hour, and the loose packing density of reduced iron after compact processing is 3.95g / cm 3 ;

[0039] 3) Particle size screening again: Screening is still carried out ...

Embodiment 3

[0048] 1) The components and weight percentages are: Fe: 98%, C: 0.6%, S: 0.023%, the rest are unavoidable impurities, and the bulk density is 2.8g / cm 3 The reduced iron powder is sieved for the second time on a double-layer vibrating sieve with a diameter of 1.5 meters (a sieve with an upper aperture of 220 μm and a lower sieve with an aperture of 140 μm). , and then sieve the iron powder with a particle size (D) of 220 μm to 140 μm for a second sieve, and the second sieve feed rate is about 1000 kg / hour for particle size screening. Particle size is represented by particle size D: D≥250μm is zero, D: 250~180μm: 23.1%, D: 180~150μm: 63.5%, D≤150μm: 13.4%;

[0049] 2) Carry out dense processing: use FL500 high-speed pulverizer to carry out compact processing, and control the feeding amount at about 700 kg / hour, and the loose packing density of reduced iron after compact processing is 4.10g / cm 3 ;

[0050] 3) Particle size screening again: Screening is still carried out on a d...

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PUM

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Abstract

The invention relates to a deoxidizing iron powder method of sandblast used on the surfaces of domestic appliances. Since steel and iron block is adopted as the material, the problems of high cost and consumptions of large quantity of cooling water and energy are solved; the invention has the technical proposal that: iron powder with weight percentages of Fe more than or equal to 97 percent, C less than or equal to 0.65 percent and S less than or equal to 0.025 percent and other unavoidable impurities and loose density more than or equal to 2.6g / cm<3> is granularity filtrated for the first time; the granularity is represented by granule diameter D and required as that: D more than or equal to 250Mum is zero, D between 250 to 180Mum is less than or equal to 25 percent, D between 180 to 150Mum is more than or equal to 60 percent, and D less than or equal to 150 is smaller less than or equal to 15%. The iron powder is compacted, granularity filtrated for a second time, decarbonized, annealed, and impurities removed and packed. The invention has the advantages of low energy consumption and cost, simple procedure and easy implementation, which also expands the application scope of deoxidizing iron powder.

Description

technical field [0001] The invention relates to a production method for producing sandblasting materials used for workpiece electroplating, painting, spraying, etc. before all covered processes, especially the reduced iron powder used for sandblasting on the surface of household appliances. Background technique [0002] At present, most of the sandblasting iron powder for the surface blasting treatment of household appliances is produced by melting the steel block first, then spraying and atomizing it into small particles through high-pressure water or gas injection, and then cooling it to room temperature with cooling water, followed by drying, reduction and other processes. made. Its disadvantages: 1. Steel blocks are used as raw materials, and the price is high, resulting in increased production costs; 2. To cool the atomized steel particles from a high temperature of 1600 ° C to normal temperature, a large amount of cooling water is required, and a large amount of water ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/04B22F9/22
Inventor 石生荷焦立新李信平王爱华龙光辉
Owner 武汉钢铁有限公司
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