On July 6, one SLon-2500 (1.7T) and two SLon-2000 (1.3T) WHIMS independently developed by SLon Magnetic Separator Co., Ltd. were installed in a copper mine in Yunnan, realizing the first application of high gradient magnetic separator in chalcopyrite separation process.

      For a long time, due to the good floatability of chalcopyrite, the separation process of chalcopyrite is mainly flotation. Although chalcopyrite has weak magnetism, its specific magnetic susceptibility coefficient is very low, and it is difficult to effectively recover with general magnetic field strength. At the same time, chalcopyrite flotation needs to use a lot of flotation reagents. The production cost is not only high, but also the tailings cause great pollution to the environment. Therefore, SLon has cooperated with a copper mining enterprise in Yunnan for more than 2 months, and conducted dozens of small-scale tests and semi-industrial tests. Finally we have determined the process flow of one rougher and one scavenger magnetic separation. In the case that the raw ore copper grade is only 0.299%, it is possible to obtain the comprehensive concentrate copper grade of 0.888% with the yield rate of 29.53% and the recovery rate of 87.7%. It reduces the use of flotation reagents, improves the production efficiency, reduces the production cost, and fills the technical gap in the application of strong magnetic separation in the field of chalcopyrite.

      In recent years, SLon has adhered to innovation as the guide, made breakthroughs in a number of key core technologies in key areas, made every effort to create high-end strong magnetic equipment and mineral processing technology that reached the international leading level, and carefully developed SLon-5000 WHIMS with the world’s largest processing capacity, the intelligent treasure in the industry. Besides, it has invented the pre-selection and discarding process of high-pressure roller mill and large particle WHIMS for weak magnetic ores, and created a precedent for copper-molybdenum strong magnetic separation technology. A series of advanced equipment and technologies serve the mine construction, open up a wider mining field and market in the world, comprehensively improve the independent innovation ability and modernization level of the manufacturing industry, and greatly promote the strong magnetic separation technology and equipment of weak magnetic minerals. The upgrade has significantly promoted the technological progress of the industry, and has made significant contributions to the large-scale development of low-grade weak magnetic mineral resources, the protection of the strategic security of mineral resources, and the sustained and rapid development of the national economy in China.