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| MECHANISM OF UNDESIRED PHASE FORMATION IN PREROASTED BARIUM FERRITE PELLETS WHEN USING SCALE AS RAW MATERIAL AND SOLUTION OF THE PROBLEM |
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| DOI： |
| KeyWord:Barium ferrite Magnetic material New process Process mineralogy, |
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Tang Jigang Wang Fei Jin Baohui
(Department of Process Mineralogy)
(Magnetic Materials Center)
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| Abstract: |
| A mineralogical investigation on the factors affecting the quality of barium ferrite when making use of scale as raw material and preroasted in rotary kiln is introduced in this paper. The migration of barium inside the pellets and the formation of undesired phases in addition to the expected M type barium ferrite BaFe12O19 have been found. The mechanism concerned is explained on the basis of simulation test results, and the approach for solving this problem has been proposed. The suggestions on well controlling the atmospher in kiln and complete oxidizing "FeO" present in pellets before entering into the high temperature region of the kiln have been adopted in production. This is a successful example using the process mineralogy to solve the problems existing in ferrite production. |
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