Method for pre-enriching precious metal mineral in baiyuneboite

Abstract

The invention discloses a method for pre-enriching precious metal mineral in baiyuneboite. Firstly, the baiyuneboite ore is smashed in a first stage, strongly-magnetic mineral in the ore is removed through one-stage or two-stage low-intensity magnetic separation, then obtained weakly-magnetic mineral is smashed in a second stage, water is added, the materials are stirred, ore pulp is prepared, a dispersing agent is added, the ore pulp is fed into a sorting cavity of a super-conducting magnetic separator, the magnetic field intensity and the pulsation frequency are controlled, and weakly-magnetic concentrate adsorbed on a magnetism gathering medium in the sorting cavity and non-magnetic tailings are sorted out. Aiming at pre-enrichment of the precious metal mineral in the raw baiyuneboite ore with the extremely-fine existence granularity and the high content of the strongly-magnetic mineral, recycling and pre-tailing-discarding of extremely weakly-magnetic precious metal resources of the baiyuneboite can be achieved, and efficient utilization of the precious metal resources is improved. Compared with a conventional magnetic separator, the magnetism gathering medium in the sorting cavity of the super-conducting magnetic separator can generate the higher magnetic field intensity and gradient, and the problem about recycling of lean, fine, miscellaneous and scattered precious metalresources is effectively solved.

Description

technical field [0001] The invention relates to the field of ore dressing, in particular to a method for pre-enrichment of precious metal minerals in Baiyun Obo Mine. Background technique [0002] With the continuous development of metallurgy and material industries, my country's demand for various precious metal mineral elements continues to increase. However, with the development of mining work, high-grade precious metal resources are decreasing day by day, and mineral resources are increasingly poor, fine, and miscellaneous. It stands out that there are many small and medium-sized deposits, and few large and super-large deposits. [0003] The Baiyun Obo Mine is a rare super-large deposit in the world where polymetallic resources such as iron, rare earth, niobium, scandium, and thorium coexist. It has been proven that the iron ore reserves of Baiyun Obo are 1.4 billion tons; the rare earth reserves (all in REO) are about 100 million tons, and the industrial reserves are 43...

AI Technical Summary

Problems solved by technology

The current beneficiation process of this ore deposit is a weak magnetic-strong magnetic-flotation process, with priority for iron selection, and the rare earth flotation feedstock is strong magnetic medium ore, tailings, and reverse flotation and sedimentation. At the same time, the whole process also includes defluorination , desulfurization process, the beneficiation process of Baiyun Obo Mine is complex and the loss of rare earth is serious, and resources such as niobium, thorium and scandium are piled up in the form of tailings, resulting in serious waste of resources and environmental pollution

[0005] Patent CN106799300A, a rare earth ore beneficiation method, the ore is first ground to 50% below 200 mesh, and the strong magnetic substance is removed with a magnetic field strength below 0.5T, and the obtained weak magnetic tailings have a magnetic field strength of 5T superconducting magnetic separator , to obtain high-grade rare earth ores by enrichment. This method is suitable for minerals with coarse rare earth particle size and few strong magnetic minerals, but not for rare earth, niobium, thorium, scandium and other minerals with extremely fine particle size and strong The pre-enrichment operation of Baiyun Obo raw ore with a large content of magnetic minerals, and the method of this patent is relatively complicated and the operation is relatively cumbersome

Images