A process for purifying and whitening barite powder
By employing a process of graded pretreatment, low-temperature metal-free grinding, and mild oxidation whitening, the problems of incomplete purification and limited whiteness improvement of barite powder have been solved, enabling the production of high-purity, high-whiteness barite powder, which is suitable for high-end fields and reduces production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- YONGAN QISHENG MINERALS CO LTD
- Filing Date
- 2026-04-23
- Publication Date
- 2026-07-17
AI Technical Summary
Existing barite powder purification and whitening processes suffer from problems such as incomplete purification, limited whiteness improvement, easy generation of secondary pollution, complex processes, and high costs, making it difficult to meet the application needs of high-end fields.
The process involves graded pretreatment, low-temperature metal-free grinding, composite complexation for impurity removal, and gentle oxidation for whitening. It combines agate mortar grinding, citric acid and EDTA-2Na composite complexing agent, and sodium percarbonate and sodium sulfite gentle oxidant. Through graded treatment, low-temperature control, and recycling of filtrate, the purity and whiteness are improved simultaneously.
It effectively removes metallic impurities and organic matter from barite powder, achieving a purity of over 98%, whiteness ≥96%, and heavy metal content <10ppm. It is suitable for high-end applications, reduces production costs, and meets green and environmentally friendly requirements.