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Dry-type graded concentration method for precious metal tenuousness grainy tailings

A technology of precious metals and fine particles, applied in classification, chemical instruments and methods, solid separation, etc., to achieve the effects of high sorting efficiency, good environmental protection, improved recovery rate and comprehensive recovery level

Inactive Publication Date: 2004-03-17
WUHAN UNIV OF TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the enrichment of precious metal fine tailings that cannot be recovered by the existing traditional separation methods and the defects of the newly developed fine tailings separation technology due to the wet process, the purpose of the present invention is to provide a high-efficiency , Good environmental protection and precious metal fine particle tailings dry classification enrichment method

Method used

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  • Dry-type graded concentration method for precious metal tenuousness grainy tailings
  • Dry-type graded concentration method for precious metal tenuousness grainy tailings
  • Dry-type graded concentration method for precious metal tenuousness grainy tailings

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Embodiment Construction

[0013] The present invention is implemented in the following manner:

[0014] (1) Pretreatment of precious metal fine-grained tailings: magnetic separation and enrichment of tailings with magnetic (or weakly magnetic) substances followed by drying treatment, and non-magnetic tailings are directly dried to obtain a moisture content of ≤ 2 % of tailings powder; carry out particle size test on tailings powder, and get the particle size distribution range: d max ~ d min .

[0015] (2) Carry out the first step of dry classification on the dried tailings powder, and use a dry ultra-fine precision classification device to classify the precious metal fine-grained tailings powder into particle size structure classification, and divide it into n-grain segments. The grade structure conforms to the principle of equal velocity sedimentation and separation of target ore and non-target ore particles, specifically:

[0016] Particle size range of the first particle stage: ...

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Abstract

The present invention relates to mineral separation technology, and is dry graded enriching process of fine noble heavy metal tailings. The fine noble heavy metal tailings separating process includes the first step of dry grading, in which fine noble heavy metal tailings powder is graded into n grades according to grain size in a dry superfine precise grading unit and each grain size grade is measured and analyzed in destination mineral content before discarding the grades with lower destination mineral content; and the second step of dry grading, in which each grade of tailings powder is further divided into two parts, i. e., coarse powder as the heavier destination mineral of noble heavy metal and fine powder of lighter non-destination mineral impurity. Thus, the enrichment of fine noble heavy metal ore powder is realized. The present invention has the features of high efficiency and environment friendship.

Description

technical field [0001] The invention relates to the field of mine comprehensive utilization engineering, in particular to non-ferrous metal tailings beneficiation technology. Background technique [0002] With the sustained and stable development of the national economy, the demand for mineral resources is increasing year by year, and as a non-renewable natural resource, mineral resources will bear the burden of an overloaded population and the environment. Therefore, the full and reasonable development and utilization of national mineral resources must not only be achieved by increasing the amount of resource mining, but more importantly, by improving the level of comprehensive utilization of resources. There are more than 7,650 state-owned mines and more than 140,000 non-state-owned mines in my country. For a long time, extensive utilization methods have caused excessive consumption and waste of mineral resources. On the other hand, the annual discharge of mineral processi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B07B13/08
Inventor 叶菁高惠民
Owner WUHAN UNIV OF TECH
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