... wood, coal, liquefied natural gas, are widely used for life heating furnace stove, hot water boiler, indust Raw ... it can be used as fuel with high energy.What is straw charcoal?A green fuel with high energy, which ... raw material is straw, stalk, bark, industry waste, ect, crushed & ... calorific value):3500-5500 kilocalorie Briquette Machine for Straw Fuel