| 摘要 |
PURPOSE:To produce a high-quality magnetite preventing the oxidation of the product, by cooling the reaction liquid to a temperature below a specific level after the detection of the comletion of the reaction. CONSTITUTION:In the continuous production of magnetite and ferrite by wet oxidation process, the oxidation reaction is carried out at 80-90 deg.C and 9-10pH. When the reaction product is maintained at the reaction temperature after the completion of the reaction, the gradual oxidation of the Fe(II) in the spinel takes place. Therefore, the reaction liquid is cooled to <=70 deg.C, preferably to 40-70 deg.C after the detection of the completion of the reaction.
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