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Method for sintering high-performance permanent magnetic ferrite material by coal kiln

A permanent magnet ferrite, high-performance technology, applied in the field of high-performance permanent magnet ferrite materials sintered in coal kilns, can solve the problems of power consumption, oil consumption and resource stability, and achieve the effects of good stability, easy promotion and novel design

Inactive Publication Date: 2009-10-21
浙江凯文磁钢有限公司
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AI Technical Summary

Problems solved by technology

[0004] The present invention mainly solves the problems of power consumption, oil resource consumption and stability in the existing manufacturing method, and provides a method for coal kiln sintering high-performance permanent magnet ferrite material with high stability and high performance index

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: KV4141 permanent magnet ferrite calcined material is made of Fe 2 o 3 : SrCO 3 =6:1 for batching, plus CaCO 3 and SiO 2 Mix 0.5% and 0.3% each evenly, add 8% water and stir at the same time, press it into a cake on a honeycomb machine Φ100×100mm, put it into a four-hole kiln with a push plate size of 400×400×30mm on the push plate, the lower layer 4×3 pieces, 4×3 pieces in the middle layer, 3×3 pieces in the upper layer, according to the set temperature curve, advance at a speed of 50-70 minutes / plate, and undergo solid phase reaction in the high temperature zone to generate permanent magnet ferrite pre-sintered material , The appearance of the material is microcrystalline and taupe. After secondary batching crushing, molding, sintering, grinding and other processes, the magnetic properties can reach Br≥400mT, Hcj≥320KA / m. The KV4141 material is a high-grade material of the international advanced level, which has not been seen in domestic counterparts....

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PUM

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Abstract

The invention relates to a method for sintering a high-performance permanent magnetic ferrite material by a coal kiln, which comprises the following steps that: a formula material of a permanent magnetic ferrite is produced into honeycomb cakes, the honeycomb cakes are loaded on a refractory pushing plate in a sintering hole of a gas-fired kiln according to a horizontal mode, and the refractory pushing plate loaded with the honeycomb cakes is gradually pushed to high temperature from normal temperature according to certain speed and then enters a temperature-reducing cooling area until the refractory pushing plate comes out of the kiln to finish the whole presintering process; and a quantitative coal feeder feeds coal, the complete combustion is maintained to furthest control CO2 in the kiln, the coal is combusted in a hearth in the kiln, the honeycomb cakes are isolated from the hearth in a sintering cavity, the permanent magnetic ferrite is subjected to solid phase reaction through radiant heat and is pushed out by a pusher, and the continuous operation is performed. The method has the advantages of reasonable process, novel design, good stability, large yield, wide applicable temperature range, convenient popularization and the like.

Description

technical field [0001] The invention relates to a sintering method for pre-sintered permanent magnet ferrite materials, and mainly relates to a method for sintering high-performance permanent magnet ferrite materials in a coal kiln. Background technique [0002] The high-performance permanent magnet ferrite pre-sintered material is crushed, formed, sintered, ground, inspected, packaged, and made into permanent magnet ferrite components. It is used in the excitation function of automobile motors, and is also used in computers, communication equipment, advanced audio, and electronic machinery. To meet the development needs of my country's growing power, electronics, and electronic information industries. [0003] The original high-performance permanent magnet ferrite pre-fired material is pre-fired in an electric tunnel kiln or a rotary kiln that burns oil. Consumption of electric energy and oil resources is more. All there is stability problem in its yield and performance....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/64C04B35/26
Inventor 卢杨成
Owner 浙江凯文磁钢有限公司