... 4,energy saving Product introduction:Straw charcoal making machine can make maize straw, wheat straw, cotton straw ,rice straw, peanuts shell, corn cob ... hard waste ,after grinding ,pressurizing, density molding ,to straw coal.The forming straw coal with small volume,big proportion, combustion ... efficiency solid fuel.About the heat value release of fuel ,straw coal can replace coal, and straw coal is ...