Production technique of high-performance permanent magnetic ferrite pre-sintered material

Abstract

The invention discloses a production technique of a high-performance permanent magnetic ferrite pre-sintered material. The technique comprises steps as follows: a mixture of iron oxide red and strontium carbonate as raw materials of permanent magnetic ferrite is put in a mixing tower, water is added, grinding is performed, composition correction of iron oxide red and strontium carbonate is executed by an X-ray fluorescence analyzer, and a ratio of iron oxide red to strontium carbonate is 5.95-6.55 in percentage by mass; a mixed material obtained after the composition correction is conveyed toa centrifugal dehydrator agitating tower for dehydrating; high-concentration slurry is conveyed to a rotary kiln for pre-sintering and conveyed to a cooling kiln for cooling, finally, a product entersa ball mill for smashing, and the pre-sintered material is obtained; water content of the mixed slurry is controlled in a range of 35%-45%; in the pre-sintering stage, the feed quantity of sinteringis controlled to be 1.5T-2.5T / h, and kiln temperature of the feeding end is controlled to be 320-360 DEG C; in the ball milling stage, the granularity of the finished product is controlled to be 3-8 mu m. According to the method, batch production of the high-performance permanent magnetic ferrite pre-sintered material is realized, bottleneck of outsourcing of the pre-sintered material for a long time is solved, and stability of follow-up industry chains of the company is guaranteed.

Description

Technical field [0001] The invention relates to a production process method of permanent ferrite calcination material, in particular to a production process method of high performance permanent ferrite body calcination material. Background technique [0002] With the rapid development of the market economy and the rapid social development, the competition among manufacturing industries has become increasingly fierce, and technological innovation and breakthroughs are imminent. However, the company's pre-fired ferrite formulations have long relied on external purchases, and the production costs are high. [0003] There are two methods for traditional pre-burned material production: 1. Dry preparation (1) raw material preparation; (2) dry ball milling; (3) pelletizing; (4) low temperature pre-burning: (5) pelletizing; (6) Pre-burning at high temperature; (7) Coarse crushing. 2. Wet preparation (1) Preparation of raw materials; (2) Chemical slurry of raw materials; (3) Grinding and m...

AI Technical Summary

Problems solved by technology

[0004] The following problems exist in the purchased calcined materials: the raw material shrinkage is unstable, and molding molds with different proportions need to be configured, and the mold manufacturing cost is quite high; the raw material shrinkage is unstable, which leads to different sizes of sintered products, resulting in less grinding during the grinding process. Or too much grinding, which affects the customer's index requirements, and at the same time produces a large amount of production waste, reduces the pass rate of the entire industrial chain, and increases production costs.

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