China's perlite deposits are mainly produced in the Mesozoic, where the continental crust activity is frequent in China. This generation of volcanoes formed a volcanic belt from Heilongjiang in the north, South China Sea and Hainan Island in the south, 3,000 kilometers long and 300-800 kilometers wide. This rock belt can be further divided into three sub-bands. The first sub-band is also called Daxinganling and Yanshan sub-band. The main perlite areas in this sub-band include Hebei's Kuancheng, Pingquan and Zhangjiakou, Weichang, Wuyuan; Liaoning's Lingyuan, Faku, Jianping, Jinzhou, Jinxi Yixian, Heishan; Shanxi's Lingqiu; Henan Xinyang; Inner Mongolia's Duolun, Taipusi Banner, Zhenglan Banner, Zhonghouqi and so on. The second sub-band is called the northeastern part of the mountain and the east of the mountain. The perlite deposits in this sub-band include Jilin Jiutai and Heilongjiang Muling. The third sub-band is called the southeast coastal sub-belt. The deposits in this sub-band include the Zhejiang Ninghai rosin deposit. Industrial type of deposit There are three types of perlite separation in geology. These three divisions are slightly different except for the chemical composition restrictions, and the other items are similar to each other or complement each other. The above three classifications of ore grades are mainly carried out according to the ore expansion performance. The actual grade should be determined according to the needs. The above three divisions associate the chemical composition of the rock with its expansion factor. We believe that the expansion ratio of perlite is not necessarily entirely dependent on its chemical composition. Because according to the data of the perlite mine in Lingqiu County, Shanxi Province, there are perlites with expansion ratio k greater than 10 and Na2O/K2O=1~1.5. Fire Pump Set,Electric Fire Pump Set,Dual Fire Pump Set,Vertical Turbine Fire Pump Set Shanxi Skysea Pump Lndustry Co.,Ltd. , https://www.skyseatianhai.com