Henan Zhengzhou Mining Machinery is constructing a 2500TPD cement clinker production line by our new dry process precalcining production process. The calcining equipment used a Φ4.0X60m rotary kiln and the precalcining system use a five stage cyclone preheater and a decomposing furnace. The production line is energy-saving, environmental friendly and efficiency. It greatly improves the resource utilization. The whole cement plant is 4000 TPD and will be finished by the end of June 2012.