Practice of technological process renovation at Laoshidan Coal Preparation Plant

For improving the adaptability and hence the efficiency of the plant's coal washing processes, and based on analysis of raw coal feed property and proof of demonstration, the existing washing process is renovated by shifting to an all heavy-medium separation system. Practice shows that the revovated system works reliably with a rise of the feed tonnage from 420 t/h to 440 t/h and a drop of medium consumption from 1.8 kg/t to 1.2 kg/t, creating as a result a cumulative annual economic revenue of 32.15 million yuan for the plant.