... crop straw, wood branches, rice hull, bamboo sawdust, peanut shell, sunflower shell, furfural dregs, cotton stalks, corn stalks, sesame straw, ... are crushed first, and then compressed into formed fuel products with high density and high calorific through charcoal briquette ... 1100-1400kg/m35. The combustibility of charcoal bar produced by charcoal briquette machine has been improved greatly6. These ...