Primary Coal Crushers Grow To Meet Demand Coal Age
In the eastern U.S., where a majority of the coal production is washed, primary crushers are usually reducing a 20- to 24-inch feed to a more easily conveyed 4- to 6-inch top size. In the West, especially at large surface mines such as those found in the Powder River Basin PRB, the raw feed to the primary crusher can be as high as 60 to 70 inches. Because the RoM characteristics, these mines do not wash coal and they are looking to create a direct-ship, 2-inch product. Employing some of the largest primary coal crushers, they are reducing 20- to 70-inch RoM coal to 2 inches in a single pass.