... 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 ... : 0.8-1.4g/cm3. Durable to use, calorie can reach 3500-55004. Convenient to store and transport. 5. Burning hour is ... /cm3 weight1300kg1500kg1800kg2000kg(Finished product calorific value):3500-5500 kilocalorie Briquette Machine for Straw Fuel