Preparation process of a low-cost permanent magnet ferrite material
A permanent magnet ferrite and preparation process technology, applied in the direction of inorganic material magnetism, etc., can solve problems such as reducing the magnetic properties of ferrite, and achieve the effects of low material consumption and energy consumption, no secondary pollution, and uniform particle size
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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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