... .9-1.4g/cm3Weight1300kg1500kg1800kg2000kgCalorie: 3500-5500 Definition: straw coal refers to corn straw, wheat straw, cotton, straw, husk, groundnut shell, corncob, branches, leaves, sawdust ... -pollution.etc.Different name: Biofuel forming machine, Straw charcoal machine, straw briquetting machine, Biomass briquette machine, Straw fuel making machine, Charcoal briquette machine