Dense solid-liquid separation method in wet zinc smelting solution capable of improving clarification effect

Abstract

The invention discloses a dense solid-liquid separation method in a wet zinc smelting solution capable of improving the clarification effect, and belongs to the technical field of wet zinc smelting. According to the dense solid-liquid separation method in a wet zinc smelting solution capable of improving the clarification effect disclosed by the invention, the roasted ore granularity is properly increased, so that the problems that solid-liquid separation and clarification effects of leaching slurry are not good, the speed is slow, the middle and upper clear liquid is small in capacity, mudflow of a thick supernatant is caused, the solid content of the liquid is increased, the quality of the supernatant is worsened, or even a qualified middle and upper clear liquid containing zinc cannot be produced, and the wet production cannot be lastingly carried out are solved. A physical state of roasted ore is optimized; the roasted ore granularity is properly increased; the content of soluble silicon and iron is reduced; the liquid-to-solid ratio of a feed pulp is increased; the temperature of the pulp is improved; and the dense clarification effect is improved by a combined step of optimizing the operation method of a flocculant and changing the adding point of 3# polyacrylamide.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy zinc smelting, in particular to a dense liquid-solid separation method in a hydrometallurgy zinc solution which improves clarification effect. Background technique [0002] In the process of zinc hydrometallurgy, zinc calcined sand is dissolved in the leaching process and zinc sulfate enters the solution. Zinc ferrite and insoluble solids form a residue to form a mixed slurry. The solid and liquid must be separated by concentration and filtration. Large-scale zinc wet Generally, thickeners are used for clarification and separation of pulp separation. Factors affecting the thickening and settling effect of ore pulp include physical state of roasted ore, SiO in solution 2 with Fe 3+ The content of ions, the liquid-solid ratio of the feed pulp, the acidity of the pulp, temperature, the amount and point of flocculant added. The degree of dense separation effect of leaching production determ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is aimed at the poor clarification effect and slow speed of the liquid-solid separation thickener in the prior art, resulting in low production capacity of the middle and supernatant liquid, and in severe cases, the dense supernatant is muddy, the liquid contains solids, and the upper The deterioration of the quality of clear liquid causes difficult problems in production control and provides a method for the separation of dense liquid and solid in zinc hydrometallurgy solution that improves the clarification effect