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A method for comprehensive recovery of copper and iron minerals in metal tailings

A technology for metal tailings and iron minerals, applied in chemical instruments and methods, wet separation, solid separation, etc., can solve the problems of insufficient recovery of copper and iron resources, low recovery rates of copper and iron, etc. Good effect, reducing tailings grinding and reducing copper content

Active Publication Date: 2021-04-27
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the process is relatively simple, the recovery rate of copper and iron is low, and the recovery of copper and iron resources is not fully extracted by this process

Method used

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  • A method for comprehensive recovery of copper and iron minerals in metal tailings
  • A method for comprehensive recovery of copper and iron minerals in metal tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Step 1) Tailings pretreatment process

[0037] Process 1) Screening and removing impurities: carry out dry screening on the tailings (1) on a vibrating sieve (model SPB-200) with a sieve aperture of 6 mm to obtain impurities (28) on the sieved product, and remove impurities from the under-sieved product mine(2);

[0038] Process 2) Stirring and pre-slurry: put the impurity-removing tailings (2) obtained in process 1) into a mixing tank, add water to prepare a slurry with a concentration of 30% by mass, add water glass (a) 100g / t, Stirring for 5 minutes at a stirring speed of 240r / min to prepare pulping tailings (3);

[0039] Process 3) tailings classification: classify the slurry tailings (3) through a cyclone (model XCS-Ф25), the feeding pressure is 0.3Mpa, and the cyclone overflows to obtain fine tailings (4) and underflow coarse Granular tailings (5), the particle size range of the fine-grained tailings (4) is less than or equal to 0.074mm, the particle size range ...

Embodiment 2

[0055] Step 1) Tailings pretreatment process

[0056] Process 1) Screening and removing impurities: carry out dry screening on the tailings (1) on a vibrating sieve (model SPB-200) with a sieve aperture of 6 mm to obtain impurities (28) on the sieved product, and remove impurities from the under-sieved product mine(2);

[0057] Process 2) Stirring and pre-slurry: put the impurity-removing tailings (2) obtained in process 1) into a mixing tank, add water to prepare a slurry with a concentration of 30% by mass, add water glass (a) 50g / t, Stirring for 5 minutes at a stirring speed of 240r / min to prepare pulping tailings (3);

[0058] Process 3) tailings classification: classify the slurry tailings (3) through a cyclone (model XCS-Ф25), the feeding pressure is 0.24Mpa, and the cyclone overflows to obtain fine tailings (4) and underflow coarse Granular tailings (5), the particle size range of the fine-grained tailings (4) is less than or equal to 0.074mm, the particle size range ...

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Abstract

The invention discloses a method for comprehensively recovering copper and iron minerals in metal tailings, which comprises three steps, the first step is a tailings pretreatment process, the second step is a fine-grained tailings first copper and then iron process, and the second step is a tailings pretreatment process. The three-step process is the first iron and then copper process of coarse-grained tailings. According to the method of the present invention, by carrying out the pretreatment process to the tailings, including processes such as screening and slag removal, slurry mixing and tailings classification, most of the large waste rocks and organic impurities in the tailings can be removed, so that the tailings The composition is more simple, the amount of water glass used in the slurry mixing is reduced, the separation efficiency of minerals is improved, and the separation effect of mineral particle size is better. Adopting the process of "fine-grained tailings first copper and then iron" can reduce the grinding of tailings, make the separation effect of fine-grained copper better, reduce the iron content in copper concentrate, and fully recover iron minerals as much as possible. By adopting the process of "coarse tailings first iron and then copper", iron minerals can be fully recovered, the copper content in iron concentrate can be reduced, and copper minerals can be fully recovered as much as possible.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of tailings resources, and in particular relates to a method for comprehensively recovering copper and iron minerals in metal tailings. Background technique [0002] The accumulative stockpile of industrial solid waste in my country exceeds 60 billion tons, most of which are tailings, and it is increasing at a rate of 300 million tons per year. Most of these tailings are stockpiled in tailings ponds. It occupies a large amount of land resources, pollutes the environment, and faces the danger of dam failure, which brings great hidden dangers to the safety of people's lives and properties. At the same time, the grades of metal minerals contained in many old tailings have resource attributes due to the improvement of existing technologies, and have certain economic value for development and utilization, while the development and utilization of metal tailings in existing technologies are mainly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03B9/00
CPCB03B7/00B03B9/00
Inventor 李金惠孙乾予曾现来刘丽丽谭全银张国斌
Owner TSINGHUA UNIV