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kaolin product stability was obtained by chemical bleaching and PTMS magnetic separation iron removal
published date: 2024/11/23

magnetic separator factory

When the kaolin after preliminary removal, if the whiteness is still not meet the requirements, and the iron impurities exist in a specific insoluble state, chemical bleaching method can be adopted. Such as the use of insurance powder (even sodium bisulfite) for reduction bleaching, but the insurance powder PTMS magnetic separation reduction method is very demanding conditions, because the insurance powder is easy to decompose and make its reduction ability to reduce, must strictly control the acidity, temperature, reaction time, pharmaceutical dosage, etc.;

PTMS magnetic separation

If the bleached kaolin cannot be washed in time, the product will return yellow, but an appropriate amount of chelating agent can be added in the bleaching process, and phosphoric acid and polyvinyl alcohol are added to improve the stability of the product; the hydroxylamine or hydroxylamine salt are added after bleaching to prevent the reoxidation of valent iron, oxalic acid, citric acid, polyphosphate, ethyldiamine acetate, EDTA to improve the bleaching effect and the stability of PTMS magnetic separation iron removal products.

what is magnetic separation in Feldspar?

The impurities in kaolin will be oxidized into soluble substances by bleaching, and then washed and removed, so as to greatly improve the whiteness of kaolin products, such as the insoluble iron, converted into soluble iron, and removed by PTMS magnetic separation process.
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FELDSPAR PTMS magnetic separation 20241123

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