Beneficiation method for recovering ultra-low-grade rare earth and fluorite from rare earth tailings

Abstract

The invention discloses a beneficiation method for recovering ultra-low-grade rare earth and fluorite from rare earth tailings. The beneficiation method includes the following steps of 1, performing rare earth and fluorite mixed flotation on the rare earth tailings to obtain mixed floatation concentrates with the qualified grade; 2, performing wet magnetic separation on the mixed flotation concentrates obtained in the step 1 to obtain magnetic separation concentrates and magnetic separation tailings; and 3, performing fluorite flotation on the magnetic separation tailings obtained in the step2 to obtain high-grade fluorite concentrates. By means of the beneficiation method, the unified technological process that mixed flotation is preferentially performed on the rare earth and the fluorite to obtain the fluorite and rare earth mixed concentrates, the fluorite and rare earth mixed concentrates are then subjected to magnetic separation to separate the rare earth, and the fluorite is separated from the magnetic separation tailings is adopted, when the high-grade fluorite concentrates and the rare earth concentrates are separated from the ultra-low-grade rare earth and fluorite tailings and the fluorite is separated from the magnetic separation tailings, the flotation concentration is 5%-25%, the process adaptability is relatively good, and the defects that an existing separationprocess is high in process cost, poor in sorting effect, low in economic benefit and the like are overcome.

Description

technical field [0001] The invention relates to the technical field of rare earth ore beneficiation, in particular to a beneficiation method for recovering ultra-low-grade rare earth and fluorite from rare earth tailings. Background technique [0002] With the increase of our country's population and the development of our economy, the contradiction of our country's relative shortage of resources will become increasingly prominent. Adhering to the simultaneous development of resources and conservation, doing everything possible to reduce the occupation and consumption of resources, and actively developing comprehensive utilization of resources is a major technological economy in our country. Policy is also a long-term strategic policy in national economic and social development. It is important for saving resources, improving the environment, improving economic efficiency, promoting the transformation of economic growth mode from extensive to intensive, and realizing optimal ...

AI Technical Summary

Problems solved by technology

[0007] The object of the invention of the present invention is to: aim at the above-mentioned existing problems, provide a kind of beneficiation method that recovers ultra-low grade rare earth, fluorite from rare earth tailings, by utilizing fluorite, rare earth, barite and gangue in acid-base The characteristics of separation under certain conditions, using preferentially floating rare earth and fluorite, to obtain fluorite rare earth mixed concentrate, fluorite rare earth mixed concentrate and then magnetic separation to separate rare earth, magnetic tail and then separation of fluorite combined process, Sorting high-grade fluorite concentrates and rare earth concentrates from ultra-low-grade rare earth and fluorite tailings, and utilizing the tailings as resources to obtain high-quality rare earth and fluorite resources, thereby reducing operating costs and The discharge of tailings increases the benefits of the enterprise and overcomes the defects of the existing sorting process, such as high cost, poor sorting effect, and low economic benefits

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