Red mud iron separation method

A technology for selecting iron and red mud, applied in the field of metallurgy, can solve the problem of high sulfur content in iron concentrates

Pending Publication Date: 2020-09-11
云南九州再生资源开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of the above problems, the present invention provides a method for iron separation from red mud, which solves the problem of high sulfur content in iron concentrate, improves the metal recovery rate, and improves the concentrate grade

Method used

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Experimental program
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Effect test

Embodiment 1

[0025] Example 1: as figure 1 As shown, a red mud iron separation method includes a rough and fine red mud iron separation operation process, and an SLon2000 vertical ring pulse high gradient magnetic separator is added at the rear end of the rough separation tailings for the rough separation tailings sweeping process , the magnetic field strength is at 1.0T, before the rougher concentrate enters the beneficiation section, the rougher concentrate cyclone desliming process is added, and the iron concentrate slurry selected in the beneficiation section is added with a cyclone desliming process, The gangue and mud carried by the high-gradient magnetic separator during the beneficiation process are thrown away; the desliming process of the cyclone is added to the beneficiation tailings.

Embodiment 2

[0026] Example 2: as figure 1 As shown, a red mud iron separation method includes a rough and fine red mud iron separation operation process, and an SLon2000 vertical ring pulse high gradient magnetic separator is added at the rear end of the rough separation tailings for the rough separation tailings sweeping process , the magnetic field strength is at 0.9T, before the roughing concentrate enters the concentrating section, the roughing concentrate cyclone desliming process is added, and the iron concentrate slurry selected in the concentrating section is added with a cyclone desliming process, Throw away the gangue and mud entrained by the high gradient magnetic separator during the beneficiation process; add a cyclone desliming process to the selected tailings; mix the rough tail sweeping concentrate and the roughing concentrate into the roughing concentrate After the ore cyclone is deslimed and concentrated, the bottom flow of the cyclone enters the high gradient magnetic ...

Embodiment 3

[0027] Example 3: as figure 1 As shown, a red mud iron separation method includes a rough and fine red mud iron separation operation process, and an SLon2000 vertical ring pulse high gradient magnetic separator is added at the rear end of the rough separation tailings for the rough separation tailings sweeping process , the magnetic field strength is at 0.8T, before the rougher concentrate enters the beneficiation section, increase the rougher concentrate cyclone desliming process, and increase the cyclone desliming process at the rear end of the iron concentrate slurry selected in the beneficiation section, Throw away the gangue and mud entrained by the high gradient magnetic separator during the beneficiation process; add a cyclone desliming process to the selected tailings; mix the rough tail sweeping concentrate and the roughing concentrate into the roughing concentrate After the ore cyclone is deslimed and concentrated, the bottom flow of the cyclone enters the high grad...

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Abstract

The invention provides a red mud iron separation method and relates to a method for recovering iron from red mud. On the basis of a rough and fine red mud iron separation operation process, a tailingsscavenging process, a rough concentrate cyclone desliming process, a fine concentrate pulp desliming process, a tailings desliming process and a desulfurization process are added. The problem of highsulfur content in iron concentrate is solved, the metal recovery rate is increased, and the concentrate grade is improved.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a method for recovering iron from red mud. Background technique [0002] Red mud is a very fine-grained strong alkaline solid waste produced during the production of alumina from bauxite. For every ton of alumina produced, about 1.5 tons of red mud are produced. At present, the comprehensive utilization rate of red mud in my country is only 4%, and the cumulative stockpiles have exceeded 250 million tons. With the annual increase of alumina production in my country and the gradual decrease of bauxite grade, the annual production of red mud will continue to increase. A large amount of red mud is piled up, which not only occupies land, wastes resources, but also easily causes environmental pollution and potential safety hazards. [0003] my country has conducted a lot of research on how to comprehensively utilize red mud. The technology that has been put into industrial production is ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03B9/06
CPCB03B7/00B03B9/06Y02W30/52
Inventor 徐昊卢晋江
Owner 云南九州再生资源开发有限公司
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