Ultrasonic-assisted pulp electrolysis method for tailing sand

A pulp electrolysis and ultrasonic technology, which is applied in the direction of photographic auxiliary process, photographic process, instrument, etc., can solve the problems of low metal recovery rate, poor sorting effect and high added value

Inactive Publication Date: 2016-02-03
SUN YAT SEN UNIV +2
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AI Technical Summary

Problems solved by technology

It can effectively overcome the shortcomings of long hydrometallurgical process and high energy consumption. It is suitable for minerals with a small processing capacity but complex components and high added value, such as: lead-zinc-silver mi

Method used

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  • Ultrasonic-assisted pulp electrolysis method for tailing sand

Examples

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example 1

[0025] Example 1. Take 500g of copper-bearing tailings from Chenzhou Nonferrous Garden, Hunan Province. The minerals contained in the copper-bearing tailings mainly include chalcopyrite, pyrite, chalcocite, arsenic tetrahedrite, etc., and the particle size is less than 300 mesh. The process conditions of the pulp electrolysis are: the electrolyte of the pulp is HCl+NaCl system, the liquid-solid ratio is 10:1, the anode is a ruthenium-plated titanium mesh, the cathode is a stainless steel plate, the pole distance between the electrodes is 5cm, PH=1, and the chloride ion concentration is : 200g / L, electrolysis temperature is 65℃, cathode current density is 160A / m 2 , The electrolysis time of each batch of mineral powder is 2 hours, and the ultrasonic power is 50W.

[0026] The main electrochemical reaction in the process of ultrasonic assisted pulp electrolysis is.

[0027] 2CuFeS 2 +3 / 2O 2 +4H + =2Cu + +2FeOOH+4S 0 +H 2 O.

[0028] CuFeS 2 +3Cu 2+ =4Cu + +Fe 2+ +2S ...

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Abstract

The invention discloses an ultrasonic-assisted pulp electrolysis method for tailing sand. The hydrometallurgy process is greatly simplified by applying the pulp electrolysis technology. The method can effectively overcome the defects that the hydrometallurgy process is long, and energy consumption is high, and is suitable for a mineral which is not very high in processing amount but complex in component and high in additional value. By means of the pulp electrolysis technology, mineral powder leaching, leaching agent purifying, target metal electrolytic deposition, impurity component separating and other processes are combined in a pulp electrolytic cell to proceed. According to the technical purposes, the leaching rate of the mineral powder can be increased through the assisting function of ultrasonic waves, the leaching rate of the target metal in the mineral is improved to more than 90%, and time is shorter. By means of ultrasonic waves, metal ions can be promoted to be evenly scattered in an electrolyte, the phenomenon of cathode passivation of cations is eliminated, the current efficiency and the purity of precipitated metal are improved, and the purity of metal precipitated on a cathode reaches more than 98%. The ultrasonic technology is free of pollution, easy to operate and low in cost, the pulp electrolysis efficiency is improved, and the environment protection effect is obvious.

Description

technical field [0001] The invention relates to an ultrasonic-assisted slurry electrolysis method for tailings sand, which relates to a slurry electrolysis process for leaching tailings sand, selective electrodeposition of target metals, and separation of impurity metals under the assisted action of ultrasonic waves in a hydrometallurgical process. Background technique [0002] Tailings sand is an industrial solid waste with complex components, containing harmful elements such as sulfur, arsenic, lead, etc. recovery and utilization. [0003] Slurry electrolysis is a promising hydrometallurgical process, which has been widely used in many fields. In comparison, the disadvantage of traditional pyrometallurgy is that it is difficult to completely overcome the pollution to the environment, and it is only suitable for high-grade refined Mining and large-scale production, if the mineral composition is complex, the fire method is difficult to do. [0004] Slurry electrolysis is a...

Claims

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Application Information

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IPC IPC(8): C25C7/00C25C1/10C25C1/06
Inventor 雷恒毅陈凯白涛
Owner SUN YAT SEN UNIV
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