Preparation method of low-cost permanent magnetic ferrite material

A technology for the preparation of permanent magnet ferrite, which is applied in the direction of the magnetism of inorganic materials, can solve the problems of reducing the magnetic properties of ferrite, and achieve the effects of low material consumption and energy consumption, low production cost, and uniform particle size

Active Publication Date: 2019-03-01
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this method, tartaric acid, ethylene glycol and ammonia water are easily introduced into the solution, thus reducing the magnetic properties of ferrite.

Method used

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  • Preparation method of low-cost permanent magnetic ferrite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. First, the iron scale is subjected to magnetic separation, and the magnetic metal impurities in the oil are removed by magnetic force, and the iron scale after magnetic separation is dry crushed by a ball mill to less than 10 μm; it is oxidized at 350-850°C for 1-3 hours to oxidize Iron; the oxidized iron scales are wet ball milled again, and ground into fine powder with an average particle size of about 3 μm, and sieved to optimize, remove finer iron powder and large particle iron powder, and then prepare a kind of iron powder with SrFe 11.9 o 19 Pre-fired material for ferrite main phase. Weigh the oxidized iron scale powder (purity ≥ 98.6wt%, the original average particle size of the particles ≤ 3 μm), SrCO 3 (purity≥97wt%, the original average particle size of the particles≤1.5 μm), simultaneously add raw materials such as 0.2wt% boric acid and carry out wet primary ball milling, the ball milling time is 5 hours, the average particle size of the mixed particles i...

Embodiment 2

[0043] 1) Firstly, the iron scale is subjected to magnetic separation, and the magnetic metal impurities in the oil are removed by magnetic force, and the iron scale after magnetic separation is dry crushed by a ball mill to less than 10 μm; it is oxidized into iron oxide at 350°C for 1 hour; The oxidized iron scale is subjected to wet ball milling again, and is ground into a fine powder with an average particle size of about 3 μm, and is sieved and optimized to remove finer iron powder and large particle iron powder, and then prepare a Sr 0.75 Ca 0.05 La 0.1 Fe 11.2 co 0.05 o 19 The calcined material of the ferrite main phase is weighed according to the ratio of the processed iron powder (purity ≥ 98.8wt%, Cl- ≤ 0.2wt%, the original average particle size of the particles ≤ 1.5μm), La 2 o 3 (purity≥99.3wt%, the original average particle size of particles≤5μm), C0 2 o 3 (Co content≥72wt%, original average particle size of particles≤3μm), SrCO 3 (purity≥97wt%, the origin...

Embodiment 3

[0049] 1) Firstly, the iron scale is subjected to magnetic separation, and the magnetic metal impurities in the oil are removed by magnetic force, and the iron scale after magnetic separation is dry crushed by a ball mill to less than 10 μm; it is oxidized into iron oxide at 850°C for 3 hours; The oxidized iron scale is subjected to wet ball milling again, and is ground into a fine powder with an average particle size of about 3 μm, and is sieved and optimized to remove finer iron powder and large particle iron powder, and then prepare a Sr 0.75 Ca 0.05 La 0.1 Fe 11.2 co 0.05 o 19 The calcined material of the ferrite main phase is weighed according to the ratio of the processed iron powder (purity ≥ 98.8wt%, Cl- ≤ 0.2wt%, the original average particle size of the particles ≤ 1.5μm), La 2 o 3 (purity≥99.3wt%, original average particle size of particles≤5μm), Co 2 o 3 (Co content ≥ 72wt%, the original average particle size of the particles ≤ 3 μm), SrCO3 (purity ≥ 97wt%, ...

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Abstract

The invention provides a method for manufacturing a high-performance permanent magnetic ferrite by using iron flakes, which are subjected to pretreatment to improve purity and activity thereof. The pretreatment includes: impurity removal, crushing, oxidization, fine milling and screening. The iron flakes, after the pretreatment, should satisfy the following items: total oxide purity is not less than 98.9%, average granularity is not more than 5 [mu]m and SiO2 content is not more than 0.1%. Through the special process, the high-performance permanent magnetic ferrite material can be produced. The method is simple and reliable, is low in consumption on raw materials and energy consumption, is low in production cost, and is free of secondary pollution. The product is free of any impurity phaseand is uniform in particle size. The formula of the product accords with the ingredient range of SrFe12O19 ferrite.

Description

technical field [0001] The invention relates to a preparation technology of a permanent magnet ferrite material, in particular to a preparation process for preparing a high-performance M-type sintered permanent magnet ferrite by using iron scale as a raw material, and belongs to the field of permanent magnet ferrite materials. Background technique [0002] Iron oxide is the main raw material for the production of permanent magnet pre-fired materials. Its performance and price ratio directly affect the development of the permanent magnet industry. At present, the iron oxide used for permanent magnet pre-fired materials mainly comes from the following two aspects: 1. Using iron Iron oxide is produced by chemical methods such as adding acid to dissolve raw materials or pickling waste liquid in the iron and steel industry; 2. Ultra-pure iron concentrate and rolled steel scale. . [0003] M-type permanent magnet ferrite materials do not contain high-priced metal elements such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/40C04B35/622H01F1/11
CPCC04B35/2633C04B35/2641C04B35/2666C04B35/2683C04B35/622C04B2235/3208C04B2235/3213C04B2235/3217C04B2235/3227C04B2235/3275C04B2235/3409C04B2235/3418C04B2235/6562C04B2235/6567H01F1/11
Inventor 丁伯明胡良权叶华韦晓阳吕舒宏
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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