(1) strong magnetic minerals, than the susceptibility of greater than 3000 × 10-6 cm3 / g-magnetic iron ore, etc. pyrrhotite, i.e. with a weak magnetic separation device can be effectively separated from gangue minerals. (2) magnetic minerals than the susceptibility of 500 ~ 3000 × 10-6 cm3 / g, such as semi martite certain titanium and iron ore, chromium ore and the like, sorted by the magnetic separator apparatus . (3) weakly magnetic minerals, than the susceptibility of 15 ~ 500 × 10-6 cm3 / g, such as hematite, limonite, iron carbonate, iron manganese ore, manganese hard, rhodochrosite, rutile and Some ilmenite ore, etc., are recovered by strong magnetic separation and other methods, and the specific magnetic susceptibility is less than 15×10-6 cm 3 /g for non-magnetic minerals such as quartz , feldspar , fluorite and the like. The magnetic separation process should be selected through experiments. For magnetite ore, generally large and medium-sized magnetic separation plants use a grinding magnetic separation when the grinding particle size is larger than 0.2 mm; two-stage grinding is used when the grinding size is less than 0.2 mm. Magnetic separation, if some qualified concentrates can be selected under rough grinding conditions, the process of sorting in the stage grinding stage is adopted. If the tailings can be discarded by rough selection under coarse grinding conditions, coarse roughing and roughing, coarse ore re-grinding and re-selection can be used. When the ore contains weak magnetic minerals and strong magnetic minerals, a weak magnetic-strong magnetic combined process can be used. When the ore can discard the waste rock under the condition of large block size, the magnetic pulley can be used to pre-select a portion of the tailings. In dry water areas, dry grinding is used for dry magnetic separation. Magnetization roasting magnetic separation mainly deals with weak magnetic iron ore. The ore is heated in a roaster and the weak magnetic iron mineral is changed into a ferromagnetic iron mineral in a suitable atmosphere, and then magnetic separation can be performed to obtain a better selection. index. China's 75 to 20 mm lump ore has been used for the long-term production practice of shaft furnace reduction roasting. High-gradient magnetic separation is mainly used for sorting fine-grained minerals with fine particle size (below 20-30 microns). In addition to metal ore, it can be used for de- ironing of kaolin to improve whiteness. It can also be used for sewage purification, etc., and has been used in industrial production. . Custom Printed Poly Mailers,Custom Poly Mailing Bags,Courier Mailing Bags,Poly Mailers Bags Dongguan Pasike Packaging Co., Ltd. , https://www.nbdgpasike.com
Magnetic separation is an effective method of mineral processing
Magnetic separation is an effective beneficiation method. According to the difference of specific magnetic susceptibility of various minerals, magnetic separation with different magnetic field strengths is generally divided into three categories: