Located in wedbank coalfield, South Africa, Kral coal mine invested in the construction of a 3.0mt/a dry coal preparation plant in 2010 to separate No. 2 thermal coal. The ash content of raw coal is 40.4%, the ash content of cleaned coal after beneficiation is 30.6%, and the recovery rate is 85%. It is mainly sold to power plants. The dry separation plant has an hourly processing capacity of 500 tons and an annual operation of 6000 hours. It has the advantages of short investment payback period, low operation cost and high recovery rate.