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Method for dewatering micro-particle tailing ore pulp

A technology of fine particles and tailings, applied in the direction of separation methods, chemical instruments and methods, and separation of sediments by centrifugal force, etc., can solve problems such as solid-liquid separation, ecological environment damage, restrictions, etc., to achieve solid-liquid separation and overcome filtrate Unclear, the effect of improving dry stacking efficiency

Inactive Publication Date: 2012-12-05
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

After 2000, more than 600 million tons of solid tailings have been discharged every year. Based on this calculation, the total amount of tailings has exceeded 10 billion tons. The stock of these tailings occupies a large amount of farmland and forest land and causes great damage to the ecological environment.
[0010] For oxygen-sulfur mixed copper ore, due to the limitation of the nature of the ore, the process of combining flotation and wet leaching has to be used to recover copper resources. Although this process has achieved a high recovery rate, the problem of solid-liquid separation in tailings leaching has become a problem. The technical bottleneck problem of the normal application of the process limits the application of this method

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  • Method for dewatering micro-particle tailing ore pulp
  • Method for dewatering micro-particle tailing ore pulp

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Experimental program
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Effect test

Embodiment 1

[0030] Embodiment 1: The specific steps of the dehydration of fine tailings pulp in this embodiment: Feed the iron tailings pulp with a content of -0.074mm of 70wt% and a solid mass percentage concentration of 25% into the inclined plate thickener, and obtain a solid mass of 100% by thickening. Thickener underflow with a concentration of 45%, which is fed into a horizontal screw discharge centrifuge for dehydration, to obtain tailings with a solid mass percentage concentration of 75%, which is suitable for dry transportation and stockpiling; the horizontal screw discharge centrifuge The slurry that comes out of the discharge centrifuge and has a solid mass percentage concentration of less than 5% is returned to the inclined plate thickener for thickening, forming an inclined plate thickener—a closed-circuit thickening dehydration process of the horizontal screw discharge centrifuge, and the inclined plate thickener The supernatant is return water whose solid content reaches the...

Embodiment 2

[0031]Example 2: The specific steps for the dehydration of the fine-grained tailings slurry in this example: feed the tailings slurry with a content of -0.074mm of 80wt%, and a solid mass percentage concentration of 30% zinc (after flocculation treatment) into the inclined plate thickener. Thicken to obtain the underflow of the thickener with a solid mass percentage concentration of 40%, and the underflow is fed into a horizontal screw discharge centrifuge for dehydration to obtain tailings with a solid mass percentage concentration of 80%, which is suitable for dry transportation and storage ; The ore pulp with a solid mass percentage concentration of less than 4% from the horizontal screw discharge centrifuge is returned to the inclined plate thickener for thickening, forming a closed circuit thickening dehydration process of the inclined plate thickener-horizontal screw discharge centrifuge, The supernatant of the inclined plate thickener is the return water whose solid cont...

Embodiment 3

[0032] Embodiment 3: The specific steps of the dehydration of the fine tailings pulp in this embodiment: the content of -0.074mm is 85wt%, and the solid mass percentage concentration is 10% iron tailings pulp is thickened to obtain an underflow with a solid mass percentage concentration of 45%. , carry out centrifugal dehydration on the underflow to obtain tailings with a solid mass percentage concentration of 85%, which is suitable for dry transportation and stockpiling; return the ore pulp with a solid mass percentage concentration of less than 5% from the centrifuge and return it for thickening. The supernatant obtained from thickening is backwater whose solid content reaches the national mineral processing industrial water standard, and can be returned to the mineral processing process for use.

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Abstract

A method for dewatering micro-particle tailing ore pulp belongs to the technical field of beneficiation. The method comprises: condensing the micro-particle tailing ore pulp after the beneficiation to obtain bottom flow in 40%-50% of solid mass percentage concentration; then centrifugally dewatering to obtain the tailing ore in 70%-85% of solid mass concentration; and obtaining dry stack tailing ore. The centrifugally dewatered pulp in a less than 5% of solid mass concentration is re-condensed, and the obtained supernatant can be recycled in the beneficiation process flow. The method disclosed by the invention adopts a centrifugal dewatering technology, obtains the dry stack tailing ore in the mass percentage concentration as high as 85%, improves dry stack efficiency, overcomes the defects of unclear filtrate, high moisture in slag, blockage and breakage of a conventional condensation and filtration system such as filtration cloth, low work rate, large tailing roe dewatering system investment and the like, and realizes the efficient dewatering of the micro-particle tail ores.

Description

technical field [0001] The invention relates to a method for dehydrating fine-grain tailings slurry in a mineral processing plant, and belongs to the technical field of mineral processing. Background technique [0002] Tailings are the mixture of gangue minerals and water left after the raw ore of the concentrator has been crushed, ground, and sorted to separate useful minerals. The water content is 90% to 70%. It is formed during the mining development process. Solid waste in the form of a slurry. In recent years, my country's mining industry has developed rapidly, and there are more than 100,000 mines. Therefore, the discharge and stockpiling of mining solid waste produced by the development of mineral resources every year is very huge. According to statistics, before 2000, the total amount of solid tailings in mines in my country exceeded 5 billion tons. After 2000, more than 600 million tons of solid tailings have been discharged every year. Based on this calculation, ...

Claims

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Application Information

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IPC IPC(8): B01D21/26B01D21/00
Inventor 文书明周兴龙龙泽毅柏少军刘丹曹沁波沈海英
Owner KUNMING UNIV OF SCI & TECH