Novel purification process for zinc hydrometallurgy solution

Abstract

The invention provides a novel purification process for zinc hydrometallurgy solution. The novel purification process for zinc hydrometallurgy solution comprises the following steps: adding novel impurity removal agent, namely, activated carbon in purification subsequent solution after purification filter pressing for conventional solution, directly feeding filter residue to a zinc leaching residue tailing filter pressing feeder trough and performing filter pressing, and feeding the filter residue after filter pressing to a volatilization kiln and performing recovery processing. Compared with the traditional solution purification process, the content of organic matters in the purification subsequent solution is reduced by more than 60%, and the contents of muddy fine particles and crystals such as calcium and magnesium are reduced by more than 80%, thus achieving the purpose of improving the quality of the solution, reducing the influence on an electrolytic process for the subsequent solution, and achieving good economic benefits.

Description

technical field [0001] The invention relates to a novel process for purifying a zinc hydrosmelting solution, which belongs to the field of nonferrous metal smelting. Background technique [0002] At present, activated carbon adsorption technology is usually used to reduce organic matter and oil in low-content heavy metal solutions or wastewater, which has better adsorption effect and long service life. The waste residue after activated carbon adsorption has low heavy metal content and can be directly treated in an open circuit. The invention relates to a technology for removing oil from zinc sulfate solution in the zinc hydrometallurgy industry. The main component of the slurry solution contains 100-200 g / l of zinc, which belongs to a high-content heavy metal solution. Activated carbon is also used to absorb and separate the zinc in the zinc sulfate solution. For organic matter, there are generally no evaluation report documents for its promotion and application effect, and ...

AI Technical Summary

Problems solved by technology

The invention relates to a technology for removing oil from zinc sulfate solution in the zinc hydrometallurgy industry. The main component of the slurry solution contains 100-200 g / l of zinc, which belongs to a high-content heavy metal solution. Activated carbon is also used to absorb and separate the zinc in the zinc sulfate solution. For organic matter, there are generally no evaluation report documents for its promotion and application effect, and its application has not been popularized. It can be seen that its effect is not ideal. Individuals who use this method usually add activated carbon directly to the solution in the leaching or purification stirring reactor. The effect of degreasing is not good, the amount of use is large, and even a large amount of use is used at multiple points. After use, the activated carbon will open the circuit with the filter residue, and there will be loss of heavy metals, and the treatment cost is high. This method cannot be good at the same time. Oil is opened and heavy metals are recovered, so the application is not as popular as wastewater treatment and household

[0003] For a long time, in the production process of hydrometallurgy, there are two obvious problems in the solution purification process: one is the inevitable existence of muddy and crystallization problems in the hydraulic filtration process after purification, and the other is that there is no organic matter in the purification process. The problem of purification and removal, the existence of these two problems causes the quality of the purified liquid to fluctuate, and ultimately has an adverse effect on the zinc electrolysis process, ranging from increased power consumption to severe burns, which increases the production cost of hydrometallurgy zinc

[0006] Generally, in order to reduce investment and operation steps, reduce labor intensity, and reduce costs in general hydrometallurgy enterprises, activated carbon is usually added directly to the solution in the leaching or purification stirring reactor. The adsorption effect is not good, and the usage is large, mainly for leaching the pulp The solid content is high, and various additives must be added. It is not a pure zinc sulfate solution, which will affect the surface area of ​​activated carbon adsorption, and cannot fully exert the adsorption function, resulting in a large amount of use, or even a large amount of use at multiple points, and high processing costs.

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