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A platform for research: civil engineering, architecture and urbanism
Process for preparing permanent magnetic ferrite in short process
The invention relates to a process for preparing permanent magnetic ferrite in a short process. The process comprises the following steps: proportioning ultra-pure magnetite concentrate and strontium carbonate according to the molar ratio of SrO.nFe2O3 (n is more than 5.6 and less than 6.1), and then carrying out wet-process mixed grinding and water filtration; feeding the slurry subjected to water filtration into a first rotary kiln for drying, granulating and pre-oxidizing, and then feeding the slurry into a second rotary kiln for pre-sintering; and crushing the pre-sintered material, adding an additive to carry out secondary batching, and then carrying out wet-process mixed grinding, water filtering, magnetizing compression molding, sintering and grinding to obtain the permanent magnetic ferrite. In the preparation process of the permanent magnetic ferrite, a two-stage rotary kiln process is innovatively provided, drying, granulation and pre-oxidation of a pre-sintering material are carried out in the first rotary kiln, and a pre-sintering reaction is completed in the second rotary kiln, so that the oxidation of the ultra-pure magnetite concentrate is closely linked with the solid-phase sintering reaction process of iron strontium oxide, the links of drying, cooling, pelletizing, strong mixing and chain numbness machine pre-oxidation in the prior art are omitted, and the production is more efficient and smoother.
一种短流程制备永磁铁氧体的工艺：按照SrO·nFe2O3，5.6
Process for preparing permanent magnetic ferrite in short process
The invention relates to a process for preparing permanent magnetic ferrite in a short process. The process comprises the following steps: proportioning ultra-pure magnetite concentrate and strontium carbonate according to the molar ratio of SrO.nFe2O3 (n is more than 5.6 and less than 6.1), and then carrying out wet-process mixed grinding and water filtration; feeding the slurry subjected to water filtration into a first rotary kiln for drying, granulating and pre-oxidizing, and then feeding the slurry into a second rotary kiln for pre-sintering; and crushing the pre-sintered material, adding an additive to carry out secondary batching, and then carrying out wet-process mixed grinding, water filtering, magnetizing compression molding, sintering and grinding to obtain the permanent magnetic ferrite. In the preparation process of the permanent magnetic ferrite, a two-stage rotary kiln process is innovatively provided, drying, granulation and pre-oxidation of a pre-sintering material are carried out in the first rotary kiln, and a pre-sintering reaction is completed in the second rotary kiln, so that the oxidation of the ultra-pure magnetite concentrate is closely linked with the solid-phase sintering reaction process of iron strontium oxide, the links of drying, cooling, pelletizing, strong mixing and chain numbness machine pre-oxidation in the prior art are omitted, and the production is more efficient and smoother.
一种短流程制备永磁铁氧体的工艺：按照SrO·nFe2O3，5.6
Process for preparing permanent magnetic ferrite in short process
一种短流程制备永磁铁氧体的工艺
XU BIN (author) / JIANG TAO (author) / ZHOU YUJUAN (author) / YANG YONGBIN (author) / LI QIAN (author) / ZHONG SHOUGUO (author) / CHEN YUFENG (author) / WU JINTIAN (author) / LI GUANGHUI (author) / GUO YUFENG (author)
2021-11-09
Patent
Electronic Resource
Chinese
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