In April 2015, the Jiangzhuang Coal Mine Coal Preparation Plant of Zaozhuang Mining (Group) Company successfully put into operation the heavy medium shallow groove renovation project. The project was provided by Shenyang Kedi Tongda Mining Machinery Co., Ltd. with a technical renovation plan, XZQ heavy medium shallow groove sorting machine, and dense control system. The renovated raw coal preparation system processes 540 tons of gross coal per hour, meeting the annual production capacity requirement of the mine of 3 million tons.