Zhengzhou Tong Ding machine is the first triple cylinder rotary dryer manufacturer in Zhongyuan, Zhongyuan sand dryer leading enterprise. Our three return drier has advanced technology, good production, stable performance, low coal consumption and high cost performance. The equipment is widely used in drying yellow sand, river sand, quartz sand, slag, clay and other raw materials. It is very suitable for the investment and development of the broad masses of customers.