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Purification of low grade kaolin by PTMS MAGNETIC SEPARATOR
Время: 2024-01-31

Magnetic separator

Some impurities in kaolin can be selectively dissolved by leaching agents such as sulfuric acid, hydrochloric acid and nitric acid to remove impurities. The method is mainly used for the iron-reduction PTMS MAGNETIC SEPARATOR purification of low-grade kaolin, such as the removal of hematite, limonite and siderite.

PTMS Electromagnetic Separator

Taking the acid-soluble iron removal process as an example, the acid solution is used to treat kaolin, and the insoluble compounds in it are transformed into soluble compounds, and then separated from kaolin. Generally, sulfuric acid, hydrochloric acid and oxalic acid can be used for iron removal in kaolin heating. However, the removal of iron by leaching with sulfuric acid will cause the lattice damage of kaolinite, and it is difficult to maintain the crystal form and physical properties of kaolinite. Oxalic acid can dissolve iron ions which are firmly connected with the crystal lattice on the mineral surface without affecting the lattice structure and physical and chemical properties of kaolin.

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Therefore, in the actual production process, polyphosphate, ethylenediamine acetate, oxalic acid, citric acid and metal ions can be used to generate stable water-soluble chelates to achieve the purpose of removing iron and whitening kaolin mineral processing PTMS MAGNETIC SEPARATOR.

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