Method for extracting and recovering zinc from high leaching residue flotation tailing water

A technology of flotation tailings and high leaching slag, which is applied in the field of zinc extraction and recovery, can solve the problems of loss of extraction zinc transfer volume, difficulty in production system balance, increase of silver system volume, etc., to reduce the amount of carried oil, ensure time, Effect of reducing zinc loss by washing

Inactive Publication Date: 2021-01-08
CHIFENG ZHONGSE ZINC IND CO LTD
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Problems solved by technology

[0003] At present, we adopt the technology of "extracting and recovering zinc from lead-silver slag beneficiation tailings water of zinc hydrometallurgy" disclosed in CN105838886B patent, which adopts the production process of secondary extraction, secondary water washing and primary stripping. The water consumption per wash is 20-30m³, about 90m³ per day, about 2700m³ per month, and about 32400m³ per year, which increases the volume of the silver system and brings difficulties to the balance of the production system
The water washing process is started, and the transfer amount of extracted zinc is lost by about 2g / L, which affects the extraction rate

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  • Method for extracting and recovering zinc from high leaching residue flotation tailing water

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Embodiment 1

[0019] Embodiment 1: as figure 1 Shown, a kind of method for extracting and recovering zinc from high leaching slag flotation tailings water, it comprises pre-extract treatment, secondary extraction, secondary water washing, strip extraction, strip treatment and raffinate treatment steps, the The above-mentioned pre-extraction treatment includes the following steps: (1) neutralization and removal of impurities: adding lime to the high leaching residue flotation tailings water, adjusting the pH value to 5.5, filtering and removing the filter residue, and obtaining the neutralization filtrate; (2) replacement Adsorption and impurity removal: Add zinc powder and activated carbon to the neutralization filtrate, heat to 38°C, and perform a displacement reaction for 50 minutes. Add 1.0-1.5kg of activated carbon to each cubic meter of neutralization filtrate. 2+ Ions and Cu 2+ Determine the content of ions, add zinc powder replacement reaction to neutralize the water-soluble Ca in t...

Embodiment 2

[0020] Embodiment 2: as figure 1 Shown, a kind of method for extracting and recovering zinc from high leaching slag flotation tailings water, it comprises pre-extract treatment, secondary extraction, secondary water washing, strip extraction, strip treatment and raffinate treatment steps, the The above-mentioned pre-extraction treatment includes the following steps: (1) neutralization and removal of impurities: adding lime to the high leaching residue flotation tailings water, adjusting the pH value to 6, filtering and removing the filter residue, and obtaining the neutralization filtrate; (2) replacement Adsorption and impurity removal: Add zinc powder and activated carbon to the neutralization filtrate, heat to 36°C, and perform a displacement reaction for 55 minutes. Add 1.0-1.5kg of activated carbon to each cubic meter of neutralization filtrate, and the amount of zinc powder depends on the Ca in the neutralization filtrate. 2+ Ions and Cu 2+ Determine the content of ions...

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Abstract

The invention discloses a method for extracting and recovering zinc from high leaching residue flotation tailing water. The method comprises the steps of pre-extraction liquid treatment, extraction, washing, back extraction, strip liquor treatment and raffinate treatment, wherein the pre-extraction liquid treatment comprises the steps of adding lime for neutralization and impurity removal, and adding activated carbon and zinc powder for replacement adsorption and impurity removal; and the washing comprises the steps of performing two-stage countercurrent washing on an extracted loaded organicphase by using a dilute acid solution, determining whether the dilute acid solution is added or not according to the content of Cu <2+> ions in the loaded organic phase, monitoring the content of theCu <2+> ions in the loaded organic phase, adding the dilute acid solution for washing when the content of the Cu <2+> ions in the loaded organic phase is greater than or equal to 0.5mg/L, stopping adding the dilute acid solution when the content of the Cu <2+> ions in the loaded organic phase is less than 0.5mg/L, and not performing washing. The method disclosed by the invention can save water resources, reduce the loss of zinc caused by washing, reduce the phenomenon of plate burning caused by too high oil content and improve the yield and the quality of electrodeposited zinc sheets.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, in particular to a method for extracting and recovering zinc from high leaching slag flotation tailings water. Background technique [0002] The high leaching slag produced in the process of hydrometallurgy is rich in valuable metals, such as gold, silver, zinc, etc. After the high leaching slag is pulped, the gold and silver in it can be recovered by flotation. Flotation After the liquid-solid separation of the tailings water, the liquid contains about 25g / L of zinc ions, and then the zinc ions are separated from the solution by solvent extraction, and the zinc sulfate liquid is obtained through the stripping process with sulfuric acid. Electrolytic zinc flakes are obtained by electrolysis. The process of recovering valuable metals from high leaching slag includes three steps: silver flotation, pressure filtration and zinc extraction. Among them, the content of harmful impurities in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B19/30C22B1/00C22B3/20C22B3/22C22B3/46C22B3/26
CPCC22B7/006C22B19/30C22B1/005C22B3/20C22B3/22C22B3/46C22B3/26Y02P10/20
Inventor 孙磊赵锐锋谷翠刚王文祥关旭东魏景文李文涛季洪辉
Owner CHIFENG ZHONGSE ZINC IND CO LTD
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