... is 40-80mm.Briquettes are made by grinding Biomass and sawdust into a homogeneous pulp and forming this into a ... stalks, bamboo saw dust, bagasse agro-forestry wastes, such as sawdust, wood chips, branches, crop stalks, sugarcane residue, coffee husk, paddy ... by spiral extruding at high temperature, under high pressure, wood element in wood material becomes plastic and makes the fine fiber combine ...