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What minerals are reduced by sodium borohydride PTMS magnetic separation method
published date: 2024/2/21

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The reaction time has great influence on the iron removal effect, too short time can not reach the ideal whiteness; 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, the reaction should be immediately washed, filtered, PTMS magnetic separation to remove iron, otherwise there will be yellowing phenomenon, that is, the reoxidation of bivalent iron, so that the whiteness of kaolin is reduced;

PTMS magnetic separation


Although the concentration of pulp has little effect on PTMS magnetic separation bleaching itself, the viscosity of pulp increases when the concentration is too high, making the reaction difficult. Generally, the concentration of pulp should be controlled below 15%. Sodium borohydride reduction method, the commonly used reducing agent in addition to sodium bisulfite, there are zinc bisulfite, compared with the former is very unstable, the latter is much more stable.

what is magnetic separation?


However, bleaching with zinc dithionite will make the concentration of zinc ions in the wastewater too high, causing pollution to the river water. For this purpose, sodium borohydride PTMS magnetic separation reduction method can be used. This method is actually bleaching by reacting sodium borohydride with other agents to produce sodium dithionite during the bleaching process.
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SILICA SAND PTMS magnetic separation 20240221

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