Mineral processing technology for recycling fluorite from baotite, magnetite and tailing

Abstract

The invention belongs to the technical field of mineral engineering and provides a mineral processing technology for recycling fluorite from baotite, magnetite and tailing. In the tailing, mineral particle size of the fluorite is thin, iron-bearing mineral, rare-earth mineral, gangue mineral and the fluorite mineral are closely symbiotic and floatability of minerals such as rear earth, barite, apatite, calcite and dolomite is close to the fluorite mineral, so that separation of the fluorite mineral is difficult. According to the mineral processing technology for recycling the fluorite from the baotite, the magnetite and the tailing, priority desulfuration, rear earth flotation, ore grinding, iron selection through magnetic separation, fluorite selection through direct flotation and a reverse flotation sorting technology are performed on the magnetite and the tailing to enable pyrite, the rare earth, the iron-bearing mineral and the fluorite to be picked out in sections, efficient, high selective, easy-to-operate inhibitor and collecting agent combination is utilized in sorting of fluorite which is mostly performed monomer separation, so that fine fluorite of high grade and high recovery rate is obtained, a purpose of synthetically recycling valuable minerals is achieved, and effective separation of the fluorite mineral and the gangue mineral is achieved.

Description

technical field [0001] The invention relates to a beneficiation process for recovering fluorite from magnetite tailings in Baotou Mine, belonging to the technical field of mining engineering. Background technique [0002] The Baiyan Obo Mine is a large-scale ore deposit dominated by iron, rare earth, niobium and fluorite, accompanied by polymetallic symbiosis, of which the magnetite weak magnetic tailings are about 3.6 million tons per year, containing about 20% of fluorite. Due to the fine particle size of fluorite minerals, iron minerals, rare earth minerals, gangue minerals and fluorite minerals are closely symbiotic, and the buoyancy of rare earth, barite, apatite, calcite, dolomite and other minerals is similar to that of fluorite minerals. It brings great difficulties to the separation of fluorite minerals. Although domestic fluorspar concentrates with a grade of about 95% have been obtained by direct flotation for fluorspar ores with relatively simple mineral composi...

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Problems solved by technology

Due to the fine particle size of fluorite minerals, iron minerals, rare earth minerals, gangue minerals and fluorite minerals are closely symbiotic, and the buoyancy of rare earth, barite, apatite, calcite, dolomite and other minerals is similar to that of fluorite minerals. It brings great difficulties to the separation of fluorite minerals

Although domestic fluorspar concentrates with a grade of about 95% have been obtained by direct flotation for fluorspar ores with relatively simple mineral composition and relatively fine particle size, the weak magnetic tailings of magnetite with complex mineral composition and fine particle size The fluorite minerals in the still cannot be effectively separated

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