SU1296617A1 - Method for removing admixtures from zinc sulfate solution - Google Patents

Abstract

The invention relates to non-ferrous metallurgy, mainly to zinc metallurgy, and can be used to remove from impurities zinc sulphate solutions obtained from the hydrometallurgical processing of zinc concentrates. The purpose of the invention is to reduce the consumption of potassium permanganate and increase the degree of purification of cadmium and cobalt. The zinc sulphate solution is purified from impurities by cementation on zinc metal with the addition of potassium permanganate to the solution. Manganese (II) sulfate is additionally introduced into the solution at a mass ratio of manganese (II) and manganese (VII) (t, 5-700): 1. 1 tab. Q S (L

Description

The invention relates to non-ferrous metallurgy, mainly to zinc metallurgy, and can be used to remove from impurities zinc sulphate solutions obtained from the hydrometallurgical processing of zinc concentrates.

The aim of the invention is to reduce the consumption of potassium permanganate and increase the degree of purification from cadmium and cobalt.

Example. 0.800 dm solution having a pH of 5.12 and composition, g / dm: zinc 118; copper 0.190; cadmium 0,213j iron 0,144; cobalt 0.014; Nickel 0.015, is subjected to cementation with zinc dust of particle size + 0.25-0.09 mm at 60 ° C and stirring

Examples, et Consumption KMPO, n MnSO in the experiments of the quality of MpO ,, as in experiment 1.

Using the proposed method of cleaning a solution of sulfate, zinc from impurities reduces the consumption of permanganate (2.5 times), eliminates the consumption of sulfuric acid and reduces the consumption of metal

Uh

solution mixer with a frequency of 6, 7 1 / s. Duration of cementation

3.0-10 q. A potassium permanganate solution with a concentration of 12.6 g / dm and a solution of manganese sulphate (II) with a concentration of 40.0 g / dm are used to activate zinc dust.

When carrying out the process, portions of zinc powder are loaded into a preheated solution of the indicated composition with stirring, after which portions of solutions of manganese sulfate and potassium permanganate are loaded and the beginning of the experiment is recorded,

The table shows the effect of the consumption of manganese (II) sulphate on the results of the cementing purification of zinc sulphate solution.

3-10 selected I9 conditions of the same colic zinc for cementation (by 10–15% relative)} simplification of the cementation cleaning technology by eliminating sulfuric acid in the solution being cleaned} reducing the concentration of cadmium and cobalt impurities

Claims (1)

a corresponding improvement in plant quality with the addition of potassium permanganate to the solution, the resultant potassium purification, characterized in that, with a chain of decreasing the consumption of potassium permanganate and increasing the degree of formula 5 of the purification of cadmium and cobalt, manganese sulfate is introduced into the solution. The method of purification of a sulfate (II) solution with a mass ratio of manganzinc from impurities, including their ca (II) to manganese (VII), equal to the carburization on metallic zinc (1.5-700): 1.