Abstract:  Through comparison of the fineness of coal charge before and after the cross screen of coal crusher, the result shows that the additional pre-screen can reduce over-crushing, with the proportion of <0.5 mm coal drop by 14.68% and increase coal charge per oven by 1.1 tons, with dust reduction by 2.3 t/d. It also saves spare parts and power consumption for the system by CNY 906,000 each year, with direct economic benefit up to CNY 17, 400, 000 plus

Key words:  Pre-screening, Cross screen, Coal blend