Heavy medium separation technology in China has developed rapidly since 21st Century. The main separation equipment is reported to be the heavy medium cyclone, which has now has 45 types of specification, whose maximum feed capacity is 1300t / h. Since 2014, the Chinese company Beijing Guohua Co., Ltd. has successfully developed a large processing capacity of the S-3GHMC series super heavy medium cyclone.
Through the optimization of structure and structure parameters, it can ensure that the high and low density materials enter the high and low density areas of the cone in the cyclone with a more accurate and faster route. The K value of 350 was obtained in the presence of S-3GHMC super heavy medium cyclone compared with that of 200 in the presence of conventional heavy medium cyclone.
Separation accuracy S-3GHMC series super heavy medium cyclone not only has large processing capacity, but also possesses high separation accuracy. A large number of laboratory and industrial experiments were carried to optimize the structure of the S-3GHMC series heavy medium cyclone. Experimental results showed that the Ep value of the first separation process was 0.03 and the Ep value of the second process was 0.04. Meanwhile, the lower limit of the effective selection can reach -0.25mm size fraction.
Compared with the same specifications of the 3GHMC heavy medium cyclone, the feed pressure of S-3GHMC heavy medium cyclone was greatly reduced, the corresponding reduction in energy consumption was 20% to 40%. The cost for the maintenance was also decreased since the abrasion during the separation process was reduced.
Good separation In January 2017, the S-3GHMC super heavy medium cyclone was tested in two coal preparation plants in china. Experimental results showed that a good separation result was obtained. The ash content of the clean coal and the tailings both met the requirements of the market. The Ep value of the first section and the second section were both less than 0.1, indicating the good separation accuracy of the S-3GHMC super heavy medium cyclone.
In order to evaluate the S-3GHMC cyclone, the 3GHMC cyclone was also tested in the two coal preparation plants. Experimental results indicated that the processing capacity of S-3GHMC cyclone was 105-150 t/h higher than that of 3GHMC cyclone, the feed pressure was 0.04-0.06 MPa lower than that in the presence of 3GHMC and the power consumption in the process was 0.11-0.17 kwh/t lower compared with that of 3GHMC cyclone.
The S-3GHMC cyclone possesses much higher processing capacity and higher separation accuracy than conventional 3GHMC cyclone. The lower limit of the effective selection reached -0.25mm size fraction. The feed pressure of S-3GHMC heavy medium cyclone was greatly reduced, the corresponding reduction in energy consumption was 20% to 40%. The cost for the maintenance was also decreased since the abrasion during the separation process was reduced.
Contact Liang Shen Email: shen654520@126.com College of Material Science and Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China
Authors Zhou Wei, Shen Liang, Chai Chuanchuan School of Material science and engineering, Anhui University of Science and Technology,
Zhang Shilong Beijing GuoHua technology group, BeiJing, China, 100000
Acknowledgments The authors are grateful the support provided by Natural science Foundation of Anhui province (1608085QE12), (1708085QE128) and (1808085QE120), the Key University Science Research Project of AnHui Province (KJ2017A071), thanks should also be given to scientific research personnel in the laboratory of Beijing GuoHua technology group.
