Wet-process comprehensive recovery and utilization method for zinc replacement residues

A zinc smelting and wet process technology is applied in the field of comprehensive wet recovery and utilization of zinc smelting replacement slag, which can solve problems such as environmental pollution, and achieve the effects of solving environmental pollution, strengthening the leaching process and improving the metal leaching rate.

Inactive Publication Date: 2017-06-13
GUIZHOU HONGDA ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of the invention can effectively recover zinc, germanium, gallium, copper, iron and silicon dioxide in the zinc smelting replacement slag, and the leaching rate of each metal is greater than 94%; it is beneficial to improve the comprehensive recovery rate of metals, and the recovery rate is as high as 95%. At the same time, the energy consumption of the whole process is reduced, and the waste liquid generated is returned to leaching, which achieves the purpose of recycling, solves the problem of environmental pollution, and is environmentally friendly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A wet-process comprehensive recycling method for zinc smelting replacement slag, specifically comprising the following steps:

[0027] (1) After mixing zinc smelting replacement slag and sulfuric acid solution at a liquid-solid ratio of 7:1, add it to the reaction kettle, control the temperature at 60-100°C, and set the weight ratio of potassium permanganate to zinc smelting replacement slag as Add potassium permanganate at 2:1, the reaction time is 3h, and the resulting mixed material is subjected to solid-liquid separation to obtain oxidative acid leaching solution and lead leaching slag; the sulfuric acid solution is industrial sulfuric acid or electrolytic zinc waste liquid with a concentration of 120g / L;

[0028] (2) Mix the lead-containing leaching slag obtained in step (1) with sulfuric acid solution at a liquid-solid ratio of 7:1, then add it to the reaction kettle, control the temperature at 60-100°C, and mix the fluorinating agent and lead-containing leaching ...

Embodiment 2

[0035] A wet-process comprehensive recycling method for zinc smelting replacement slag, specifically comprising the following steps:

[0036] (1) Mix zinc smelting replacement slag and sulfuric acid solution at a liquid-solid ratio of 10:1, then add it to the reaction kettle, control the temperature at 60-100°C, and set the weight ratio of hydrogen peroxide to zinc smelting replacement slag at 4:1 Add hydrogen peroxide, the reaction time is 6h, and the obtained mixed material is subjected to solid-liquid separation to obtain oxidized acid leaching solution and lead leaching slag; the sulfuric acid solution is industrial sulfuric acid with a concentration of 200g / L;

[0037] (2) Mix the lead-containing leaching slag obtained in step (1) with sulfuric acid solution at a liquid-solid ratio of 10:1, then add it to the reaction kettle, control the temperature at 60-100°C, and mix the fluorinating agent and lead-containing leaching Potassium fluoride was added at a weight ratio of 0...

Embodiment 3

[0044] A wet-process comprehensive recycling method for zinc smelting replacement slag, specifically comprising the following steps:

[0045] (1) After mixing zinc smelting replacement slag and sulfuric acid solution at a certain liquid-solid mass ratio of 4:1, add it to the reaction kettle, control the temperature at 60-100°C, and adjust the weight ratio of ammonium persulfate to zinc smelting replacement slag Ammonium persulfate is added at a ratio of 1:1, the reaction time is 1h, and the resulting mixed material is subjected to solid-liquid separation to obtain oxidative acid leaching solution and lead leaching slag; the sulfuric acid solution is industrial sulfuric acid with a concentration of 50g / L;

[0046] (2) Mix the lead-containing leaching slag obtained in step (1) with sulfuric acid solution at a liquid-solid ratio of 4:1, then add it to the reaction kettle, control the temperature at 60-100°C, and mix the lead-containing leaching residue with ammonium fluoride and l...

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PUM

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Abstract

The invention discloses a wet-process comprehensive recovery and utilization method for zinc replacement residues. The wet-process comprehensive recovery and utilization method can efficiently recover zinc, germanium, gallium, copper, iron and silicon dioxide in the zinc replacement residues, and the leaching rates of all the metals are all higher than 94%. The wet-process comprehensive recovery and utilization method is conductive to improving the metal comprehensive recovery rate, meanwhile, the energy consumption in the whole technological process is reduced, generated waste liquid is returned for leaching to achieve the purpose of cyclic utilization, the problem of environmental pollution is solved, and the wet-process comprehensive recovery and utilization method is environment-friendly.

Description

technical field [0001] The invention relates to a method for comprehensive recovery and utilization of zinc-smelting substitution slag by wet method, in particular to a method for comprehensive recovery and utilization of zinc-smelting substitution slag by wet method with high leaching rate. Background technique [0002] Zinc replacement slag is a large amount of industrial solid waste generated when zinc powder is used to replace impurities in the purification section of the hydro-method zinc smelting enterprise. Discharge will cause serious environmental pollution and is a national hazardous waste. Zinc replacement slag usually contains valuable metals such as Zn, Pb, Cu, Ge, etc. The zinc grade in the slag is generally 20-25%, the copper grade is 3-8%, the germanium grade is 0.1-0.2%, and the lead grade is 5-8% %, has a very high comprehensive recycling value. When this kind of slag is recovered by the traditional rotary kiln volatilization process, most of the copper wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B19/20C22B15/00C22B41/00C22B58/00C22B13/00
CPCC22B7/006C22B13/045C22B15/0063C22B19/22C22B41/00C22B58/00Y02P10/20
Inventor 聂登攀薛涛王振杰薛安刘安荣朱明燕韦国龙曾光祥
Owner GUIZHOU HONGDA ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD
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