SU865988A1 - Method of zinc extraction from sulfate solutions by electrolysis - Google Patents

Description

(54) METHOD FOR EXTRACTING ZINC FROM SERIOUS SUSTAINABLE ELECTROLYSIS SOLUTIONS

The invention relates to colored 1 "plastic, in particular, to the extraction of zinc by electrolysis from sulphate solutions. Known methods for the extraction of zinc from sulphate solutions of electrolysis with the introduction of such additives as gelatin, gum arabic, olecine glass, various grades of adhesive PZ into the electrolyte. Introduction of additives improves the performance of the electrolysis process. The closest in technical essence and the achieved result is a method of extracting zinc from. sulfate solutions by electrolysis with the introduction of an additive to the electrolyte of an additive of mesarwood glue in the amount of 20-60 mg / lN of Odax} the introduction of all the listed additives does not sufficiently increase the current efficiency, which leads to an unproductive expenditure of electrical power. The purpose of the invention is to increase the current output when zinc is extracted by electrolysis from sulphate solutions. This goal is achieved by the fact that according to the method of extracting zinc from sulfuric acid solutions by electrolysis with the introduction of an additive into the electrolyte, the corrosion inhibitor XOSP-10 in an amount of 10-20 mg / l is used as the last. TU on HOSP-10 are made and decorated in accordance with GOST 2.114-70, GOST 2.115-70 and OST 6-35-1-72. The introduction of HOSD-10 into the electrolyte ensures the achievement of a higher current efficiency of zinc, which leads to energy savings. PRI me R. Of the sulfate electrolyte composition of zinc 50 g / l; sulfuric acid 135 g / l; iron 30 mg / l; copper 0.3 mg / l; cobalt 2 mg / l; antimony and 3 mg / l electrolytically precipitate zinc.

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All electrolysis experiments were performed with xHOSP-10, both in the solution, the current density of 600 A / m, which was found in the cell, and in its composition. The composition of the electrolytic cell was controlled by a neutral solution.

by continuous feeding into the electrolyte, the results of experiments on the effect of different neutral solution of zinc sulphate, 5 personal amounts of the HOSP-10 additive on with a concentration of 140 g / l, the current output of zinc are given in the study.

As can be seen from the table, the introduction of XOCn-iO into the electrolyte as an additive to the corrosion inhibitor allows an increase in the zinc current efficiency.

Considering that in industrial production the process of zinc extraction by electrolysis from sulphate solutions lasts 24 hours, laboratory studies were carried out for the same duration i

The use of the proposed method for the extraction of zinc by electrolysis from sulfuric acid solutions with the introduction of the HOSP-S additive to the electrolyte provides an increase in current output of zinc by an average of 3% compared to the known and, consequently, a decrease in the specific energy consumption per 100 kW / h, and the use of synthetic reagent instead of scarce glue of animal origin.

Claims (2)

1. A method of extracting zinc from sulfate solutions by electrolysis with the addition of an additive to the electrolyte, characterized in that, in order to increase the current efficiency of zin5 865988 ka, to the electrolyte as an additive. Sources of information KIs are introduced to the HOSP-Y corrosion inhibitor. 2. Spozsb under item I, about tl and h and -1. Osio metallurgy, M. t. 2 and with the fact that the inhibitor corro-1962, p. 362. sia XOCn-lQ is introduced in the amount of 10-s 2. Press with a butt xi1 osh 11. AND 20 mg / l. 8, 1979, p. 1763-1766. V