Coal preparation plant - WikipediaA coal preparation plant is a facility that washes coal of soil and rock, crushes it into graded . The coal delivered from the mine that reports to the coal preparation plant is called run-of-mine, or ROM, coal. This is the raw . There are several points in the wash plant that many coal operations choose to sample. The raw coal.mining and washing of coal industry,Coal Mining Processing Methods | Griffin CoalProcessing takes place at Griffin Coal's Ewington Mine. . Most cleaning processes involve washing the coal in order to separate coal particles from stone.