Feldspar is an important raw material for ceramics, glass and other manufacturing industries. As glass and ceramic products become more and more high-grade, the demand for high-purity and low- iron feldspar raw materials continues to expand. Although China's feldspar resources are abundant, it generally has a high iron content and must be applied after iron removal and purification. At present, China's feldspar processing and purification has problems such as low grinding efficiency, backward ore processing technology, and outdated production equipment, and has not formed scale and industrialization. In view of the above problems, the ore-bearing properties and characteristics of the Yichun potassium-sodium feldspar mine in Jiangxi Province were studied, and the high-efficiency wet continuous grinding was used instead of the traditional stone wheel milling or intermittent gravel grinding. Grinding fineness under porcelain ball, steel bar and steel ball medium. For the characteristics of iron, titanium and other impurity minerals mainly concentrated in fine-grain grade ore, the fineness of grinding is controlled to -74μm 55%~60%. Based on the above test results, laboratory small-scale tests, semi-industrial tests and industrial tests were carried out, and satisfactory selection indexes were obtained. The laboratory small-scale experiment adopts the process of “selective grinding-flotation-de-sludge-magnetic separationâ€, which can be effectively treated by selective grinding, butyl xanthate flotation pyrite, deliming classification and high gradient magnetic separation. The iron and titanium minerals in the ore were removed, and a high quality feldspar concentrate with a yield of 72.70%, Fe2O3 0.17%, and TiO2 0.058% was obtained. The semi-industrial test adopts the process of “selective grinding-classification-pyrite flotation-magnetic separation- mica flotationâ€, selective grinding and spiral grading closed circuit, flocculent flotation of pyrite, and weak magnetic Selecting and high-gradient magnetic separation, as well as Zhongnan mica flotation agent ZN116 flotation mica and other processes, can obtain high-quality feldspar concentrate with a yield of 67.85%, Fe2O3 0.17%, and TiO2 0.06%. The test results show that under the conditions of expanding the test scale and continuous grinding and sorting, the process used in the laboratory small test has good adaptability and stability. Industrial tests were conducted based on the results of laboratory small and semi-industrial tests. The final feldspar concentrate yield is 66.10%, Fe2O3 content is 0.10%, TiO2 content is 0.03%, K2O+Na2O is 13.54%, which meets China's Changshi special grade and export grade standards. Currently, the process has been put into production. Through the research of this paper and related topics, the new technology and reasonable process route for low-quality potassium-sodium feldspar ore processing and purification have been obtained, and the second- and third-grade low-quality feldspar resources in Yichun, Jiangxi Province, have been processed and purified. The standard or premium product standard has expanded the resources of high-quality feldspar raw materials that are in short supply in China.
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