Precipitation method-non-metallic ore method
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Common sources of mineral silicon are wollastonite, coal gangue, opal, hard kaolin, kaolin, halloysite, diatomite, bentonite, serpentine, quartz sand, fly ash, yellow phosphate, sea foam Stone etc. After crushing these ores, acid leaching or alkali leaching, and then adjusting pH, filtering, drying and other steps, can prepare white carbon black that meets standards. Take kaolin as an example: after kaolin is pre-baked to enhance its acid-soluble reaction activity, it can be leached with acid to prepare white carbon black.
