Method of electrolytically recovering zinc
AssigneeRuhr-Zink GmbH
InventorsAdolf von Ropenack, Gunter Stock, Ulrich Heubner
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Abstract
A lead alloy anode for a cell for the electrowinning or electrolytic recovery of zinc consists of 0.05 to 0.25% by weight strontium and/or 0.05 to 0.1% by calcium in combination with 0.1 to 0.5 silver, balance lead. The cell is used in a method for the recovery of zinc at, for example, a current density of 160 to 630 amp/m.sup.2, a temperature of 30.degree. to 46.degree. C. and an electrolyte containing 40 to 70 g/l zinc and 165 to 220 g/l sulfuric acid.
Claims3
A method of electrolytically recovering zinc from an acid eletrolyte comprising the steps of immersing an anode consisting of essentially 0.1 to 0.5% by weight silver, at least one element selected from the group which consists of 0.05 to 0.25% by weight strontium and 0.05 to 0.1% by weight calcium, balance lead, in said electrolyte and juxtaposing said anode with a cathode;
- and electrolyzing said electrolyte between said anode and said cathode to deposit zinc on said cathode.
Dependencies are inferred from the claim text.