Method for flotation of cryptocrystalline magnesite

Abstract

The invention relates to a method for flotation of cryptocrystalline magnesite. According to the technical scheme, magnesite lean ore is smashed and then ground, the obtained magnesite lean ore powder is sequentially subjected to primary ore grinding, low intensity magnetic separation, high intensity magnetic separation, third-time reverse flotation, secondary ore grinding and fifth-time direct flotation, and finally the upper-layer foam material which is received is dried. By adopting the method disclosed by the invention, the content of MgO in the low-grade cryptocrystalline magnesite can be effectively increased, the impurity content can be reduced, and the existing cryptocrystalline magnesite resources can be effectively developed and utilized, so that not only is the energy saved, but also the resource environment is protected, and better economic benefits and social benefits are created.

Description

technical field

[0001] The invention belongs to the field of flotation methods, and in particular relates to a flotation method for processing lean aphanitic magnesite ore into high-quality magnesite. Background technique

[0002] Magnesite is widely used in metallurgy, building materials, chemical industry, light industry, agriculture and animal husbandry, and magnesium extraction due to its high refractoriness, cohesiveness and other excellent physical and chemical properties. Magnesite is one of the advantageous mineral resources in my country. Its main type is crystalline magnesite. Its reserves, output and export volume all rank first in the world. The total reserves of magnesite in my country are about 3 billion tons, among which, the first and second grade products with MgO content above 43% account for 53% of the total reserves, and the reserves of first grade or above (including special grade) magnesite reach 1.17 billion tons , accounting for 37.6% of the total res...