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Technology of recycling permanent magnet ferrite by microwave sintering method
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A permanent magnet ferrite and microwave sintering technology, applied in the field of magnetic materials, can solve problems such as waste of resources and environmental damage, and achieve the effects of reducing pollution, saving energy and improving densification rate
Inactive Publication Date: 2016-02-17
南通飞来福磁铁有限公司
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Problems solved by technology
If these unqualified products are directly discarded, it will not only waste a lot of resources, but also cause great damage to the environment
Method used
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Embodiment 1
[0021] In this embodiment, a microwave sintering process for regenerating permanent magnet ferrite includes the following steps:
[0022] (1) Coarse crushing: the recovered permanent magnet ferrite waste is roughly crushed by dry ball milling to obtain raw materials, wherein the weight ratio of the material to the steel ball is 1:3, and the crushing time is 40 minutes;
[0023] (2) Doping: Add ferric oxide, strontium oxide, barium oxide, manganese oxide and a dispersant to the crushed raw material, wherein, ferric oxide, strontium oxide, barium oxide, manganese oxide and zinc stearate The addition amount is respectively 10%, 0.5%, 0.05%, 1.5% and 4% of the raw material weight;
[0024] (3) Fine grinding: put the mixed materials together in a ball mill, adopt wet ball milling method, wherein, the mass ratio of material, water and steel balls is 1:3:5, and the ball milling time is 80min to obtain slurry, slurry The average particle size is 4μm;
[0025] (4) Molding: the slurry...
Embodiment 2
[0028] In this implementation, a microwave sintering method for recycling permanent ferrite technology includes the following steps:
[0029] (1) Coarse crushing: the recovered permanent magnet ferrite waste is roughly crushed by dry ball milling to obtain raw materials, wherein the weight ratio of the material to the steel ball is 1:5, and the crushing time is 70 minutes;
[0030] (2) Doping: Add ferric oxide, strontium oxide, barium oxide, manganese oxide and dispersant to the crushed raw materials, among which, the amount of ferric oxide, strontium oxide, barium oxide, manganese oxide and polyethylene 5%, 0.1%, 0.35%, 0.5% and 2% of the raw material weight respectively;
[0031] (3) Fine grinding: the mixed materials are placed in a ball mill together, and a wet ball milling method is adopted, wherein the mass ratio of material, water and steel balls is 1:4:6, and the ball milling time is 130min to obtain slurry, slurry The average particle size is 2μm;
[0032] (4) Formi...
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Abstract
The invention discloses a technique for recycling permanent magnetic ferrite by a microwave sintering process. The technique comprises the following steps: (1) coarse crushing: carrying out coarse crushing on the recycled permanent magnetic ferrite waste; (2) doping: adding ferric oxide, strontium oxide, barium oxide, manganese oxide and dispersing agent into the raw material; (3) fine grinding: putting the mixture in a ball mill to obtain a slurry; (4) molding: standing the slurry, separating the water, and extracting the supernatant excess water to obtain the green compact; and (5) microwave sintering: naturally drying the green compact in air in a natural environment, sintering the green compact under microwave conditions, and naturally cooling to obtain the ferrite material. The recycling technique is simple and is used for recycling the waste permanent magnetic ferrite, thereby saving the energy, reducing the environmental pollution and lowering the manufacturing cost of the product. The microwave sintering process can implement uniform heating, enhance the densification rate of the material and effectively inhibit the ferrite material crystal grains from abnormal growth.
Description
Technical field: [0001] The invention relates to a technique for regenerating and utilizing permanent ferrite by a microwave sintering method, which belongs to the field of magnetic materials. Background technique: [0002] For a long time, ferrite permanent magnet materials have been widely used in various motors with high power, high speed and high torque due to their high cost performance, such as high-end automobile motors (ABS motors, starter motors, etc.), motorcycle starter motors , household appliances and electric tool motors and other fields. [0003] With the continuous development of technology and the continuous expansion of the market, ferrite materials will inevitably cause a large number of waste products due to various reasons in the mass production process. If these unqualified products are directly discarded, it will not only waste a lot of resources, but also cause great damage to the environment. Therefore, it is necessary to recycle the permanent ferr...
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