Recycling method for mineral processing waste water with high leaching residue content in zinc hydrometallurgy

Abstract

The invention discloses a recycling method for mineral processing waste water with high leaching residue content in zinc hydrometallurgy. In the recycling method, a P204 extract phase is used to extract zinc-bearing solution; waste electrolyte in a zinc-metallurgical electrolysis system is used to reextract a P204 organic extraction phase to allow zinc in the P204 organic extraction phase to enter the waste electrolyte; and reextraction solution returns to a zinc hydrometallurgy leaching system after deoiling. In the recycling method, zinc sulphide concentrate is added to the mineral processing waste water with mineral processing reagent content exceeding 200mg/L after filtration treatment to be mixed for primary adsorption; and the zinc sulphide concentrate can effectively absorb aerofloat in the mineral processing waste water and remove excessive mineral processing reagent from the mineral processing waste water. The zinc recycled by the recycle method can be conveniently applied to the existing facility; the reextraction solution can directly return to the zinc hydrometallurgy leaching system after the deoiling; the process produces no pollution; the recyclable zinc metallicity can be increased; and better economic benefit is achieved.

Description

technical field [0001] The invention belongs to the recycling method of ore dressing wastewater in hydrometallurgy, in particular to the recycling method of hydrometallurgy zinc high leaching slag ore dressing wastewater. Background technique [0002] In the zinc hydrometallurgy process, a large amount of high leaching slag is produced every year. The high leaching slag contains silver, zinc, lead, copper and other valuable metals. Valence metals are recovered by flotation process. In the flotation process, a large amount of beneficiation wastewater will be produced. Through the laboratory analysis of the beneficiation wastewater, the zinc content in the beneficiation wastewater is 16g / l-18g / l, which is relatively high and has recovery value. In the prior art, the mineral processing wastewater is sent to the sewage treatment station for neutralization treatment before recycling, but this method in the prior art will not only cause the loss of zinc in the mineral processing ...

AI Technical Summary

Problems solved by technology

In the prior art, the mineral processing wastewater is sent to the sewage treatment station for neutralization treatment before recycling, but this method in the prior art will not only cause the loss of zinc in the mineral processing wastewater, but also increase the processing cost of the mineral processing wastewater

[0003] Mineral dressing wastewater contains a large amount of mineral dressing reagents. In the prior art, only activated carbon is used to adsorb mineral dressing reagents. However, when the mineral dressing wastewater contains more than 200mg / L of mineral dressing reagents, the adsorption effect of activated carbon is not ideal.

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