Small Particles Biofuel/biomass/straw Briquetting Machine diameter 8-20mm factory-outlet "Straw Coal" Introduction "Straw Coal" refers to the fuel which is made through grinding, pressing, increasing density with stalk and solid waste as raw material, for example: the corn stalks, wheat straw, cotton stalks, rice straw, rice husk, peanut shell, corn cob, branches, leaves, sawdust and other crops ...