Method for preparing kaolin by calcining high-ignition-loss kaolinite-type coal gangue
By using tunnel kiln drying and calcination technology and temperature control, the problems of overburning and black core in the preparation of kaolin from high-loss-on-ignition coal gangue have been solved, achieving efficient and low-cost kaolin preparation with significantly improved product purity and economic benefits.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANXI CHAOPAI CALCINED KAOLIN CO LTD
- Filing Date
- 2026-05-14
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies make it difficult to effectively utilize high-loss-on-ignition coal gangue to prepare kaolin, resulting in overburning or black core, poor product performance, and inability to be used for conventional purposes.
The tunnel kiln drying and calcination process is adopted. By controlling the temperature and setting the atmosphere in the preheating zone, drying zone, decarburization zone, calcination zone and cooling zone, the carbon is removed by the combustion of high loss on ignition coal gangue to prepare kaolin brick blanks, avoiding over-firing and black core. No binder needs to be added to the brick blanks.
It achieves complete decarbonization of high loss on ignition coal gangue, resulting in high product purity, reduced production costs and energy consumption, and improved product quality and economic benefits.
Smart Images
Figure CN122403933A_ABST