... high efficiency 4,energy saving Product introduction:Straw charcoal making machine can make maize straw, wheat straw, cotton straw ,rice straw, peanuts shell, corn cob, branch, ... waste ,after grinding ,pressurizing, density molding ,to straw coal.The forming straw coal with small volume,big proportion, combustion resistant, ... time:18 days after order High efficiency straw charcoal making machine