Manufacture of high performance binding Sr ferrite magnet powder from iron scales

A strontium ferrite, high-performance technology, applied in the field of magnetic material manufacturing, can solve the problems of high cost, coarse strontium ferrite bonded magnetic powder grains, low intrinsic coercivity, etc., so as to improve performance and design. Reasonable and cost-reducing effect

Inactive Publication Date: 2007-08-08
ANTE MAGNETIC MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The manufacture of high-performance strontium ferrite bonded magnetic powder generally uses iron red as raw material in the prior art, and is produced by high-temperature sintering and other processes. The strontium ferrite bonded magnetic powder obtained by this method has coarse grains and intrinsic coercivity Low power, high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Granulation, oxidation and ball milling of iron scales: Use a 1200-4500mm ball mill to turn 10 tons of raw iron scales into powder with a particle size of 4-8μm, and then use a disc granulator to granulate the pellets with a size of 8-16mm. The obtained pellets are then oxidized in a rotary kiln, the temperature of the rotary kiln is controlled at 900℃-1000℃, and the atmosphere in the kiln is 0 2 :8-9%, get oxide balls, then use 1200-4500mm ball mill to grind the oxide balls into iron oxide powder; the particle size of iron oxide powder is less than 3μm, the reaction formula is: 2Fe3O 4 +1 / 2 O 2 = 3Fe 2 O 3 ;

[0021] Ingredients-mechanical compounding: combine the iron oxide powder obtained in the previous step with 1.8 tons of SrCO 3 Make ingredients and use water as the medium. After mixing, perform ball milling in a 1200-4500mm ball mill; the ball mill uses 8-16mm steel balls; the mass ratio of material: steel balls: water is 1:4.5:1; the milling time is 20 ho...

Embodiment 2

[0026] The processes and steps of Example 2, Example 3, Example 4, Example 5, and Example 6 are the same as those of Example 1, and the specific parameters are shown in Table 1.

[0027] Table 1

[0028] Name

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PUM

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Abstract

A process for preparing the adhesive magnetic powder from iron scales in order to prepare high-performance Sr ferrite includes such steps as granulating, oxidizing, ball grinding, proportionally and mechanically mixing it with other raw materials, pressing filtering, baking, grinding, sphericizing, low-temp sintering and annealing. Its advantages are high performance and low cost.

Description

Technical field [0001] The invention relates to a method for manufacturing magnetic materials, in particular to a method for manufacturing high-performance strontium ferrite bonded magnetic powder from iron scales. Background technique [0002] Strontium ferrite bonded magnetic powder is the main raw material for the production of plastic permanent magnets. It can manufacture four series of permanent magnet ferrite products including rubber, injection molding, PLM magnetization, and plastic magnetic particles. The manufacture of high-performance strontium ferrite bonded magnetic powder generally uses iron red as the raw material in the prior art, and is prepared by high-temperature sintering processes. The strontium ferrite bonded magnetic powder obtained by this method has relatively coarse grains and intrinsic coercivity. The force is low and the cost is high. Summary of the invention [0003] The task of the present invention is to design a method for manufacturing high-perfo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/26C04B35/622H01F1/11
Inventor 王兴张连墩袁燕明方可均
Owner ANTE MAGNETIC MATERIAL CO LTD
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