CN1065874A - Process for refining and bleaching barite ...
The present invention provides a process for making industrial filler, barite powder, from natural barite. The raw barite is first treated physically to obtain ultrafine barite powder, then calcined under certain conditions, water washed to remove basic materials, rinsed once with dilute acid, with proper sulfuric acid content and amount of aluminium powder used after beating agitated at ...