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High iron bauxite dressing method

A technology for high-speed iron bauxite and beneficiation methods, applied in chemical instruments and methods, flotation, wet separation and other directions, can solve problems such as adverse effects and adverse effects on the grade of iron concentrates, and achieve continuous and stable production and improve quality. , the effect of high degree of automation

Active Publication Date: 2009-04-29
中铝国际南方工程有限公司
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AI Technical Summary

Problems solved by technology

In the original test process, the grade of the aluminum concentrate I product was adversely affected by the magnetically concentrated middle ore and the swept concentrate returned to the roughing of the magnetic separation in the first roughing, fineness, and three times of magnetic selection. The selection of closed-circuit flotation also has an adverse effect on the grade of iron concentrate

Method used

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  • High iron bauxite dressing method
  • High iron bauxite dressing method
  • High iron bauxite dressing method

Examples

Experimental program
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Embodiment

[0022] The raw ore goes through crushing and grinding 1 and 2, and the particle size of the product reaches 72%-200 mesh. It enters the first coarse and first sweep magnetic separation operation drum sieve 3 to separate the slag, and the pulp of the drum sieve 3 enters the vertical ring pulsating high gradient magnetic separator 4, the vertical ring The concentrate from the pulsating high-gradient magnetic separator 4 enters the vertical ring pulsating high-gradient magnetic separator 5, and the magnetically separated concentrates from the magnetic separation operations 4 and 5 pass through concentration 6 and the bottom flow is pumped into the cyclone 11 by the sand pump 12; the vertical ring pulsating The tailings of high-gradient magnetic separator 4 and 5 go into the thickener 7 filter 8 and the filtered product is high-grade aluminum concentrate I9, Al 2 o 3 The grade is 65-70%, and the recovery rate is 55%. The underflow of the cyclone 11, the underflow concentration is...

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Abstract

The invention provides a beneficiation method for high iron bauxite. The invention adopts strengthening magnetic separating-anionic reverse flotation flow, stage grinding and stage magnetic separating. Under the condition of ensuring the magnetic separating iron concentrate recovery rate, strengthening magnetic separating has the priority to obtain higher quality aluminum concentrate one and high grade iron rough concentrate, thus improving the selection grade of the reverse flotation and opening circuit fully in the reverse flotation process, a reverse flotation rougher flotation device adopts a flotation column with large charge and fine even bubbles, thus obtaining iron concentrate with higher quality. In addition, the beneficiation method optimizes and reduces the production rate of material entering reverse flotation operation, and achieving the purposes of energy saving and consumption reducing.

Description

technical field [0001] The invention relates to a beneficiation method, in particular to a beneficiation method of high-iron bauxite. Background technique [0002] High-iron bauxite (iron oxide content greater than 15%) has a wide geological distribution in my country, and there are relatively large deposits in Guangxi (500 million tons), Henan (100 million tons), Shanxi (100 million tons), Guizhou and Shaanxi. Large geological reserves, high-iron bauxite resources have not yet been comprehensively developed and utilized. Direct use in alumina production (such as Pingguo Aluminum Plant) will not only increase the cost of alumina production, but also cause waste of resources. Therefore, a low-cost and high-efficiency beneficiation method is used to separate aluminum and iron in advance to make full use of resources. Fe in ore 2 o 3 If the content is greater than 15% or less than 3%, it will be difficult to operate the kiln when the clinker is fired; the ore contains goethit...

Claims

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Application Information

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IPC IPC(8): B03B7/00B03B1/00B03C1/025B03D1/14B02C17/00B02C23/08
Inventor 黄光洪马士强彭雪清吉红
Owner 中铝国际南方工程有限公司
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