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A method for recovering fine-grained pyrite from sulfur-containing slime tailings

A technology of sulfur-containing ore and pyrite, which is applied in the direction of solid separation and flotation, can solve the problems of environmentally harmful secondary ore slime tailings, loss of fine-grained pyrite, and reduction of metal recovery rate, etc., to achieve selectivity Ideal effect, increase floating difference, and easy operation

Active Publication Date: 2022-07-19
JIANGXI COPPER CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, increasing the desliming process will inevitably result in the loss of a part of the fine-grained pyrite, reduce the metal recovery rate, and produce secondary slime tailings that are harmful to the environment

Method used

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  • A method for recovering fine-grained pyrite from sulfur-containing slime tailings
  • A method for recovering fine-grained pyrite from sulfur-containing slime tailings

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] like figure 2 As shown, the sulfur-containing slime tailings of this embodiment contain 7.42 wt % of sulfur, and the fineness is -0.019 mm, and the minerals account for 80 wt %. Among them, the main metal minerals are pyrite, with a small amount of chalcopyrite, and the gangue minerals are mainly quartz, feldspar, mica, kaolinite and montmorillonite.

[0048] (1) Concentration and dehydration: the sulfur-containing mud tailings slurry with sulfur content of 7.42wt%, concentration of 10wt%, and fineness of -0.019mm granular minerals accounting for 80wt% was first concentrated to a slurry concentration of 22wt% by a thickener, Then, it is concentrated under the condition of rotating speed of 2770r / min by a horizontal screw centrifuge, so that the mass concentration of the pulp reaches 50wt%, and the water and the residual flotation agent in the pulp are removed;

[0049] (2) Slurry mixing: add water to the concentrated ore pulp to adjust the slurry to a concentration of...

Embodiment 2

[0055] The sulfur-containing slime tailings of this embodiment contain 5.89 wt % of sulfur, and the minerals with a fineness of -0.019 mm account for 82 wt %. Among them, the main metal minerals are pyrite, with a small amount of chalcopyrite, and the gangue minerals are mainly quartz, feldspar, mica, kaolinite and montmorillonite.

[0056] (1) Concentration and dehydration: the sulfur-containing slime tailings slurry with sulfur content of 5.89wt%, concentration of 8wt%, and fineness of -0.019mm granular minerals accounting for 90wt% is first concentrated to a slurry concentration of 18wt% by a thickener, Then, it is concentrated under the condition of rotating speed of 2920r / min through a horizontal screw centrifuge, the mass concentration of the pulp reaches 55wt%, and the water and the residual flotation agent in the pulp are removed;

[0057] (2) Slurry mixing: add water to the concentrated ore pulp to adjust the slurry to a concentration of 25wt%, and add 300g / t of conce...

Embodiment 3

[0063] The sulfur-containing slime tailings in this embodiment contain 8.51 wt% of sulfur, and the fineness of -0.019mm size minerals accounts for 83 wt%. Among them, the main metal minerals are pyrite, with a small amount of chalcopyrite, and the gangue minerals are mainly quartz, feldspar, mica, kaolinite and montmorillonite.

[0064] (1) Concentration and dehydration: The sulfur-containing sludge tailings slurry with sulfur content of 8.51wt%, concentration of 12wt%, and fineness of -0.019mm granular minerals accounting for 83wt% was first concentrated to a slurry concentration of 25wt% by a thickener, and then Concentrate by horizontal screw centrifuge under the condition of rotating speed 2870r / min, the mass concentration of pulp reaches 52wt%, remove water and residual flotation agent in pulp;

[0065] (2) Slurry mixing: add water to the concentrated ore pulp to adjust the slurry to a concentration of 35wt%, and add 500g / t of concentrated sulfuric acid to the mixing barr...

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Abstract

The invention belongs to the technical field of mineral processing, and relates to a method for recovering fine-grained pyrite from sulfur-containing slime tailings. The method comprises the following steps: firstly concentrating the sulfur-containing slime tailings pulp to be treated, Then carry out dehydration treatment to increase the concentration of the pulp and remove the residual flotation agent in the pulp; add water to dilute the concentrated and dehydrated pulp, and then adjust the pH value of the diluted pulp; introduce the adjusted pulp into the rougher flotation In the selection unit, inhibitor YN and flotation reagents are added in sequence for roughing to obtain roughing concentrate and roughing tailings; then YN inhibitor and flotation reagents are added to the roughing tailings for sweeping. , the obtained foam product is the scavenging ore dressing, and the product in the tank is the final tailings. The method of the invention treats the sulfur-containing slime tailings, and can realize the high-efficiency flotation of fine-grained pyrite without a desliming process.

Description

technical field [0001] The invention belongs to the technical field of mineral processing engineering, in particular to a method for recovering fine-grained pyrite from sulfur-containing slime tailings. Background technique [0002] For the separation of copper-sulfur ore with high gangue content, especially high slime content, the preferential flotation process is often used, that is, copper is preferentially selected under alkaline conditions. The cyclone overflow is often discharged directly into the tailings pond as sludge tailings. In fact, such slime tailings often contain varying amounts of fine-grained pyrite. If not recovered, on the one hand, resources are wasted. On the other hand, the oxidation of iron sulfide minerals often produces acid water, which is easy to damage. serious pollution of the environment. Therefore, it is necessary to recover fine-grained pyrite from sulfur-containing slime tailings, which can not only improve the economic benefits of mines, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/018B03D101/06B03D103/02
CPCB03D1/018B03D2201/005B03D2201/06B03D2203/02
Inventor 林清泉曾令明张红华林智炜
Owner JIANGXI COPPER CORP