Method and device for improving beneficiability of niobium mineral in niobium-containing tailings

A technology for minerals and tailings, applied in the field of microbial pretreatment of niobium-containing tailings, can solve the problems of low recovery rate and low grade, and achieve the effect of easy floating and improving the difference of floatability.

Active Publication Date: 2014-06-04
INNER MONGOLIA UNIV OF SCI & TECH
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Problems solved by technology

[0003] The purpose of the present invention is to improve the buoyancy difference between niobium minerals and other minerals in complex ores containing niobium, and solve the technical problems of low recovery rate and grade in the flotation recovery process of niobium minerals in complex ores containing niobium

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  • Method and device for improving beneficiability of niobium mineral in niobium-containing tailings

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Embodiment Construction

[0021] specific implementation plan

[0022] figure 1 It is an illustration of a device for recovering niobium minerals from niobium-containing tailings. The device includes: ore pile 1, acid-resistant slope foundation 2, pipeline 3, liquid collection tank 4, pipeline 5, liquid delivery pump 6, pipeline 7, Valve 8, pipeline 9, pipeline 10, spray pipe 11, gas pipeline 12, gas pipeline 13, medium storage tank 14, pipeline 15, liquid delivery pump 16, pipeline 17, valve 18 and valve 19.

[0023] (1) Surface modification of niobium minerals

[0024] Pile the niobium-containing complex tailings to be processed on the impermeable, acid-resistant slope foundation 2 to form an ore pile 1, install a spray pipe 11 on the surface of the ore pile 1, and build a liquid collection pool 4 at a lower position to collect leachate. First add Thiobacillus ferrooxidans ( Thiobacillus ferrooxidans ) medium and Thiobacillus ferrooxidans, each liter of medium contains (NH 4 ) 2 SO 4 0.15g, K...

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Abstract

The invention provides a method and a device for improving beneficiability of a niobium mineral in niobium-containing tailings. The method comprises the following steps: spraying a culture solution containing ferrous oxide thiobacilli to a niobium-containing tailing heap, wherein the ferrous oxide thiobacilli can oxidize Fe<2+> on the surface of the niobium mineral in the niobium-containing tailings into Fe<3+> so as to be dissolved out, thereby changing the category and density of particles on the surface of the mineral and improving the floatability difference between the niobium mineral and other minerals in the niobium-containing tailings; reducing Fe<3+> on the surface of hematite or magnetite into Fe<2+> ions so as to be dissolved out by using iron-reducing bacteria; meanwhile enabling Fe<2+> to rapidly form a sulfide precipitate on the surface of hematite or magnetite in the presence of sulfate reducing bacteria or Na2S, thereby improving the floatation difference between the hematite or magnetite and the niobium mineral. By using the method, the recovery rate and grade of the niobium mineral in the niobium-containing tailings can be improved, meanwhile the environmental pollution and the use of chemical agents such as an inhibitor and a regulator in a floatation process can be reduced; the method has high social benefits.

Description

technical field [0001] The invention relates to a method and a device for improving the selectivity of niobium minerals in niobium-containing tailings. In particular, the present invention relates to microbiological pretreatment of niobium-containing tailings to increase their selectability. Background technique [0002] At present, the proven reserves of niobium resources in the world are about 25 million tons, mainly distributed in Brazil, China and Canada. Brazil's niobium resource reserves are greater than 70% of the world's proven reserves, ranking first in the world, while my country's niobium resource reserves rank second in the world. For niobium minerals with coarse particle size and simple occurrence state, higher-grade niobium concentrates can generally be obtained through a relatively simple sorting process. For example, the Alaksa Mine in Brazil is the largest and richest niobium resource base in the world, and the original ore grade is Nb 2 o 5 The content ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/18B03B1/00B03D1/00
CPCY02P10/20
Inventor 李侠蒋海明司万童张金山
Owner INNER MONGOLIA UNIV OF SCI & TECH
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