Comprehensive recycling method for valuable components in zinc smelting high-sulfur slag

A zinc smelting, high-sulfur technology, applied in chemical instruments and methods, wet separation, solid separation, etc., can solve the problems of surrounding environmental pollution, poor environmental protection, inability to effectively separate coarse ores and concentrates, etc. Improve efficiency and reduce pollution

Pending Publication Date: 2022-05-06
XUZHOU GUOMAO VALUABLE & RARE METAL COMPREHENSIVE UTILIZATION INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the process of the above-mentioned process, only a single flotation can be performed, and the coarse ore and the concentrate cannot be effectively separated, resulting in a low recovery rate of the sulfur concentrate, and the toxic elements such as arsenic, cadmium, and mercury in the high-sulfur slag cannot be separated. Recycled, directly discharged will easily cause pollution to the surrounding environment, and the environmental protection is not good

Method used

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  • Comprehensive recycling method for valuable components in zinc smelting high-sulfur slag
  • Comprehensive recycling method for valuable components in zinc smelting high-sulfur slag
  • Comprehensive recycling method for valuable components in zinc smelting high-sulfur slag

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Effect test

Embodiment 1

[0027] A method for comprehensive recovery and utilization of valuable components in zinc smelting high-sulfur slag, the method comprising the following steps:

[0028] S1: Put the high-sulfur slag from zinc smelting into a pulverizer for crushing, and screen the crushed high-sulfur slag fragments to obtain high-sulfur slag with a particle size of 10mm. The screened high-sulfur slag is added to the flotation tank, and pure water is added to the flotation tank for slurry adjustment. After stirring at a speed of 50r / min, slurry A is obtained after 0.5h. The temperature of the flotation tank is controlled at 30°C. The concentration of slurry A is 20wt%;

[0029] S2: Add 0.2mol / L NaOH solution to the flotation cell, and when the pH value is 8.0, add the inhibitor and foaming agent in turn to make the inside of the flotation cell generate foam, and add the capture agent to the flotation cell The generated foam is scraped and roughed to obtain tailings A, sulfur concentrate A and s...

Embodiment 2

[0035] A method for comprehensive recovery and utilization of valuable components in zinc smelting high-sulfur slag, the method comprising the following steps:

[0036]S1: Put the high-sulfur slag from zinc smelting into a pulverizer for crushing, and screen the crushed high-sulfur slag fragments to obtain high-sulfur slag with a particle size of 15mm, and re-pulverize high-sulfur slag with a particle size exceeding 30mm. The screened high-sulfur slag is added to the flotation tank, and pure water is added to the flotation tank to adjust the slurry. After stirring at a speed of 75r / min, the slurry A is obtained after 0.7h, and the temperature of the flotation tank is controlled at 30°C. The concentration of slurry A is 30wt%;

[0037] S2: Add 0.25mol / L NaOH solution to the flotation cell, and when the pH value is 8.5, add inhibitors and foaming agents in turn to make foam inside the flotation cell The generated foam is scraped and roughed to obtain tailings A, sulfur concentr...

Embodiment 3

[0043] A method for comprehensive recovery and utilization of valuable components in zinc smelting high-sulfur slag, the method comprising the following steps:

[0044] S1: Put the high-sulfur slag from zinc smelting into a pulverizer for crushing, and screen the crushed high-sulfur slag fragments to obtain a high-sulfur slag with a particle size of 25mm, and re-pulverize the high-sulfur slag with a particle size exceeding 30mm. The screened high-sulfur slag is added to the flotation cell, and pure water is added to the flotation cell to adjust the slurry. After stirring at a speed of 100r / min for 1 hour, the slurry A is obtained. The temperature of the flotation cell is controlled at 40°C. The concentration of A is 40wt%;

[0045] S2: Add 0.3mol / L NaOH solution to the flotation cell, and when the pH value is 9.0, add inhibitors and foaming agents in turn, so that the inside of the flotation cell generates foam, and add a capture agent to the flotation cell The generated foam...

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Abstract

The invention relates to the technical field of high-sulfur slag recovery treatment, in particular to a comprehensive recycling method for valuable components of zinc smelting high-sulfur slag, which comprises the following steps: putting the zinc smelting high-sulfur slag into a crusher for crushing, and screening the crushed high-sulfur slag to obtain the high-sulfur slag with the particle size of 5-30mm, the high-sulfur slag with the particle size exceeding 30 mm is smashed again; according to the method, secondary flotation is conducted on the high-sulfur slag in the mode that rough flotation is conducted and then fine flotation is conducted, the coarse ore and the concentrate are separated out, the sulfur concentrate and the tailings are effectively separated, the sulfur concentrate recycling efficiency is improved, toxic and harmful elements such as arsenic, cadmium and mercury can be effectively recycled, metal pollutants in sewage are completely eradicated, and environmental pollution is avoided. According to the method, the toxic elements are completely treated, the pollution to the surrounding environment is reduced, and the problems that the toxic elements are not completely treated and the recovery rate of sulfur concentrate and elemental sulfur is low when the zinc smelting high-sulfur slag is treated by adopting a flotation-hot filtration method at present are solved.

Description

technical field [0001] The invention relates to the technical field of recovery and treatment of high-sulfur slag, in particular to a method for comprehensive recycling and utilization of valuable components of zinc smelting high-sulfur slag. Background technique [0002] Zinc exists mainly in the form of sulfide in nature, and the sulfide ores of zinc are mainly sphalerite and high-iron sphalerite. The zinc sulphide concentrate zinc smelting process is divided into pyrometallurgy and hydrometallurgy zinc smelting process, among which the mainstream hydrometallurgy zinc smelting process includes conventional hydrometallurgy zinc smelting (roasting-leaching-purification-electrowinning) and direct leaching process (oxygen pressure / Atmospheric pressure leaching - purification - electrowinning). The mainstream zinc sulfide concentrate direct leaching process will produce a large amount of high-sulfur slag, which is a highly toxic and hazardous waste. The pollutants in the slag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03B9/04B03D1/018B03D1/14B03D3/06C22B7/04C22B1/00C22B30/04C22B17/00C22B43/00B03D101/06B03D101/04B03D101/02B03D103/02
CPCB03B7/00B03B9/04B03D1/018B03D1/1406B03D3/06C22B7/04C22B7/006C22B1/005C22B30/04C22B17/04C22B43/00B03D2201/06B03D2201/04B03D2201/02B03D2203/02
Inventor 刘贵清解雪张邦胜王芳张帆龚卫星吴祖璇张金池刘昱辰
Owner XUZHOU GUOMAO VALUABLE & RARE METAL COMPREHENSIVE UTILIZATION INST
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