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Ferrite rubber-plastic magnetic powder and preparation method thereof

A technology of rubber-plastic magnetic powder and ferrite, which is applied in the direction of chemical instruments and methods, magnetic materials, iron compounds, etc., can solve the problems of unsuitable for industrial production, complex process, high energy consumption, etc., and reduce labor costs and energy consumption costs , The preparation process is simple and the effect of less powder impurities

Inactive Publication Date: 2020-10-27
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems of complex preparation process, high energy consumption and unsuitability for industrialized production of traditional ferrite rubber-plastic magnetic powder, the present invention provides a ferrite rubber-plastic magnetic powder with low cost and excellent magnetic properties

Method used

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  • Ferrite rubber-plastic magnetic powder and preparation method thereof

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Embodiment 1

[0026] (1) finely grind iron and phosphorus, the particle size is 6 μm, then mix with barium carbonate at an element molar ratio of 11:1, and add 1wt% kaolin to the total weight of the mixture to obtain a mixture;

[0027] (2) Add water to the above-mentioned mixture to make pellets, and fire them in a rotary kiln at a temperature of 1200°C to form pre-fired pellets, and the particle size of the pellets is controlled within 10mm;

[0028] (3) put the ball material after pre-burning into a Raymond machine and pulverize it into a coarse powder with an average particle diameter of 6 μm;

[0029] (4) The coarsely pulverized powder is dry-milled by a jet mill to obtain a ferrite rubber-plastic magnetic powder with an average particle size of 2.5 μm.

Embodiment 2

[0031] (1) Mix iron red and strontium carbonate at an element molar ratio of 11.8:1 to obtain a mixture;

[0032] (2) Add water to the above-mentioned mixed material to form pellets, and fire them into pre-fired pellets at a temperature of 1150° C. in a rotary kiln. The particle size of the pellets is controlled within 10 mm;

[0033] (3) put the ball material after pre-burning into a Raymond machine and pulverize it into a coarse powder with an average particle diameter of 4 μm;

[0034] (4) Finely grind the coarse powder through a jet mill to obtain ferrite rubber and plastic magnetic powder with an average particle size of 1 μm.

Embodiment 3

[0036] (1) Finely grind iron and phosphorus with a particle size of 5 μm, add iron red with 30wt% iron and phosphorus mass, then mix with barium carbonate at an elemental molar ratio of 10.4:1, and add 0.5wt% kaolin of the total weight of the mixture to obtain a mixture material;

[0037] (2) Add water to the above mixture to make pellets, and fire them in a rotary kiln at a temperature of 1170° C. to form pre-fired pellets. The particle size of the pellets is controlled within 10 mm;

[0038] (3) put the ball material after pre-burning into a Raymond machine and pulverize it into a coarse powder with an average particle diameter of 5 μm;

[0039] (4) Finely grind the coarse powder through a jet mill to obtain ferrite rubber and plastic magnetic powder with an average particle size of 1.8 μm.

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Abstract

The invention relates to the technical field of magnetic materials. The invention aims to solve the problems that the traditional ferrite rubber-plastic magnetic powder preparation process is complex;in order to solve the problems of low efficiency, high energy consumption and unsuitability for industrial production in the prior art, the invention provides ferrite rubber-plastic magnetic powder and a preparation method thereof, the ferrite rubber-plastic magnetic powder is prepared by mixing an iron raw material with barium carbonate or strontium carbonate and then adding kaolin, and the molar ratio of the iron raw material to barium carbonate or strontium carbonate is (10.4-11.6):1. The preparation process disclosed by the invention is simple, adopts a jet mill dry fine grinding method,has few crushed powder impurities and relatively smooth particles, is beneficial to subsequent synthesis with rubber or plastic, does not have a high-energy-consumption extremely-wet fine grinding process, is beneficial to reducing labor cost and energy consumption cost, and is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of magnetic materials, in particular to a ferrite rubber-plastic magnetic powder and a preparation method thereof. Background technique [0002] As the consumer market for refrigerators and other home appliances continues to increase, the demand for ferrite rubber and plastic magnetic powder used to manufacture refrigerator seals, door and window magnetic seals and other products is also growing rapidly. At present, the traditional process of producing ferrite rubber and plastic magnetic powder is to use iron phosphorus (or iron red) and barium carbonate (or strontium carbonate) as raw materials, through mixing, pre-calcination, coarse crushing, fine grinding, drying, and disintegration. , annealing, dispersion and other processes to prepare ferrite rubber and plastic magnetic powder. The process is complicated, and the resulting labor cost and energy consumption cost are also high, resulting in high cost o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00H01F1/03C08K3/22
CPCC01G49/0036C01P2004/61C01P2006/42C08K3/22C08K2003/2265H01F1/0311H01F1/0313
Inventor 叶华丁伯明胡良权
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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