Sudan is rich in coal mineral resource, traditional coal mine mining process and technological has a better demand, Liming heavy industry as one of the largest manufacture of the whole set of coal mining technological process and better service of our customers.

Our advanced machines for coal mining process including the crushing machines jaw crusher, impact crusher, and Grinding mill machines which including the lm vertical mill, TGM175 series trapezium grinding mill, TGM190 trapezium grinding mill and ball mill for coal crushing and grinding plant.
Traditional coal mining is surface mining, the ground covering the coal seam (the overburden) is first removed to expose the coal seam for extraction.

The elements of a surface mining operation are (1) topsoil removal and storage for later use, (2) drilling and blasting the strata overlying the coal seam, (3) loading and transporting this fragmented overburden material (called spoil), (4) primary crushing and grinding plant with the crusher machines and grinding mill machines(5) loading and transporting the coal, (6) backfilling with spoil and grading, Surface topography controls which of the surface mining methods—contour mining, area strip mining, or open-pit mining—is employed.

Liming designed coal mining process as follows:
Crushing and cleaning of mine-run coal is commonly referred to as beneficiation or preparation. Often, crushing and sizing is all that is required, but many coal seams, especially those in eastern and midwestern states, contain enough impurities to necessitate further cleaning. Whether the cleaning process is wet or dry, it is commonly referred to as washing. The dry washing method uses high pressure, pulsating airflow to blow dust from the coal. Wet washing starts with breaking and screening the coal to remove the large, hard pieces of impurities. Additional cleaning depends upon the amount, size, and nature of impurity, how it is dispersed in the coal, and how the coal is to be used. The best performance machines is the Sudan TGM175 series trapezium grinding mill.

Features of TGM175 series trapezium grinding mill:
the pressing springs have the functions of balancing and pressure increasing;
the flexible connection can make the mill stable, decrease the shocking and avoid sympathetic vibration;
high density powder separator impeller decreases the air resistance and increases powder collecting fineness and capacity;

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