Magnetic separation process

The amount of PTMS magnetic separator before iron removal can be calculated according to the amount of iron oxide in kaolin, but the actual amount is far more than the theoretical amount. The amount of insurance powder generally needs to be determined by test. In addition, the Fe2O3 content in the kaolin for iron removal bleaching should not be too high (generally less than 1%), otherwise the amount of insurance powder will lead to an increase in the cost of iron removal.

PTMS magnetic separator

The reaction time has great influence on the iron removal effect of PTMS magnetic separator, and the ideal whiteness can not be achieved if the reaction time is too short. Too long a waste of agents, and even due to the reoxidation of iron oxide in the air, also lead to a decline in product whiteness. It is generally believed that the reaction time should be 40min to 2h, and the reaction should be washed and filtered immediately after completion, otherwise there will be yellowing phenomenon, that is, the reoxidation of bivalent iron, which reduces the whiteness of kaolin.

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Although the slurry concentration has little effect on bleaching itself, when the slurry concentration is too high, the viscosity of the slurry increases, making PTMS magnetic separator difficult to carry out. Generally, the slurry concentration should be controlled below 15%.
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