High quality magnetic separator
PTMS magnetic separation
what is magnetic separation in Feldspar？
(1) The yttrium ore is added with water and dispersant according to the set concentration requirement, and is slurried in a mixer or a pulverizer. The purpose of pulping is to disperse the kaolin and separate it from the sandy minerals and plant impurities to prepare a suitable concentration of slurry for the next process.
(2) Spiral classifiers In addition to coarse sand kaolin ore, quartz, feldspar, mica and other impurities have coarser grain sizes, generally larger than 325 mesh, while kaolin has finer grain size and is mainly enriched in -2 μm. Most of the quartz and feldspar grit can be removed by a spiral classifier.
(3) The hydrocyclone is sorted by hydrocyclone. The operation is to remove the fine sand of kaolin (fine grain quartz, feldspar and other impurities). Generally, hydrocyclones of different diameters such as Ø75, Ø50 and Ø25 are used. Perform multiple sortings.
(4) The horizontal spiral centrifuge is classified by horizontal spiral centrifuge, and the process parameters (such as separation factor) can be adjusted according to different materials to maintain the stability of product quality. At present, domestic kaolin mineral processing also uses hydrocyclone to select and classify. However, due to the influence of flow and pressure changes, the product quality is difficult to stabilize at -2μm, accounting for more than 90%. The classification efficiency is not as good as that of horizontal spiral centrifugal classifier.
(5) Magnetic separation If high-quality or high-quality kaolin is required, in most cases, strong magnetic separation or high-gradient magnetic separation, chemical bleaching, and even flotation and selective flocculation are required. The dyeing mineral impurities in kaolin, such as limonite, hematite, siderite, pyrite, anatase, rutile, etc., have weak magnetic properties, so the kaolin after sand removal can be further developed with a strong magnetic separator or high gradient. The magnetic separator performs magnetic separation. Because most of the iron and titanium minerals in kaolin have a fine grain size, generally the strong magnetic separation often has a high removal rate. Therefore, most of the current industrial use of high gradient magnetic separators for magnetic separation of kaolin. In addition, the super-permeability magnetic separator with better performance has also been used for magnetic separation and de-ironing of kaolin. This magnetic separator not only further increases the magnetic field strength, but also obtains high-quality kaolin with higher quality and reduces energy consumption. After the magnetic separation of kaolin, if the whiteness index still does not meet the requirements of high-quality kaolin, chemical bleaching is generally used. The special magnetic separator for washing kaolin is a wet magnetic magnetic separator. The magnetic strength of up to 16000 GS can remove the regenerated iron in the kaolin during the kaolin milling process to improve the whiteness. And other weak magnetic substances.
(6) Chemical bleaching of chemically bleached kaolin is often related to the performance of kaolin and the impurities contained therein. The main impurities affecting the performance of kaolin are iron minerals, titanium minerals and organic matter. Commonly used chemical bleaching methods include reduction, oxidation, oxidation-reduction combined bleaching, and acid leaching.
(7) The pressure filtration process uses high pressure slurry to increase productivity, ensuring that the product moisture is less than 32 to 35%, saving energy and improving the working environment.
(8) The drying process can be strongly dried.
