Briquetting Pressure and Fine Coal Particle Distribution Affected to Performances of Cool Pressed Briquette

Briquettes for the pressurized gasification were prepared with anthracite as the raw material and the humic acid sodium and kaolin mixture as the binder. An investigation was conducted on the briquetting pressure and fine coal particle composition affected to the cool pressed strength of the briquette, heat pressed streng th and heat stability. The results showed that when the briquetting pressure was5.5 ~ 19. 5 MPa, the pressure would have high influences to the briquetting performan ces of the large particle fine coal and would have small influences to the briquetting performances of the small particle fine coal. The cool pressed strength, heat presse d strength and heat stability of the briquette prepared under a low pressure of 5.5 MPa and with- 0.075 mm particle fine coal would reach to3 630 N, 2 590 N and 97. 85% individually. The small particle fine coal would be favorable to prepare high performance briquette. In addition, when- 0. 150 mm fine coal taking 50% of the briquet te, the cool pressed strength, heat compressed strength and heat stability of the briquette would be the best and would be 4 239 N, 2 713 N and 98. 49% individually.