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Fine coal briquetting is a complex process that must deal with different types of fine-grained raw materials. It is important to determine a range of factors which will affect the process, such as material hardness, moisture content, internal and external friction, material composition, pressure, etc.
 
Fine coal has a low ability to bind during briquetting process, therefore, it is desirable to change the properties of material, which can be achieved by adding binding materials. A typical binder may contain hydrolyzed flour, lime, starch, molasses and some acids. Besides, fine coal can also be mixed with biomass materials to forming in a coal briquette press machine to produce alternative fuels.