The major raw material is low grade coal and coal fines. Other raw materials required are blinders such as bentonite, molasses, plastic clay, lime and sodium silicate. Process of Manufacturing: The manufacturing process involves the following steps: 1. Crushing/ grinding of coal to below 2mm 2. Preparation of binders in a semiliquid form 3.
Wirtgen Surface Mining: Maximizing coal recovery by minimizing fines. Most coal mines measure the particle size distribution (PSD) of their plant feed to obtain information about the suitability of the feed for their process, especially regarding the fines content.