Coal-sand attrition system and its' importance in fine coal cleaning. Eighth quarterly report, June 1, 1992--August 31, 1993

摘要

The research efforts on the importance of a coal-sand attrition continued with work in four categories: Continuous grinding tests using steel media; fracture tests on coal samples compacted at different pressure; SEM-Image analysis of feed and ground product coal samples; zeta potential measurements of coal samples ground by different media, and flotation test of coal samples ground by different media. Results are described.