A kind of preparation method of zinc electrowinning anode

Abstract

The invention discloses a method for preparing a zinc electrodeposited anode, which comprises: batching and mixing powder: batching lead powder, silver powder, and lead dioxide powder, rolling and mixing the batched powder until uniform; in mass percentage, The silver powder is 0.1-1%, the lead dioxide powder is 0.1-10%, and the rest is lead powder; pressing and sintering: pressing the uniformly mixed powder and sintering in a reducing and protective atmosphere; cooling: cooling the sintered material naturally. The invention has low equipment requirements and is easy to prepare the anode. The anode prepared by the invention has the advantages of low oxygen evolution overpotential, high mechanical strength, good corrosion resistance, long service life, etc., and can replace the traditional casting Pb-Ag anode.

Description

technical field

[0001] The invention belongs to the technical field of nonferrous metal hydrometallurgy, and in particular relates to a preparation method of a zinc electrodeposition anode. Background technique

[0002] Zinc is a non-ferrous metal that is widely used in machinery manufacturing, automobiles, aviation, ships, batteries and other fields, and plays a vital role in the national economy. Metal zinc is dominated by hydrosmelting, accounting for about 85% of the total zinc output, and about 80% of the electricity consumption in hydrosmelting is used for electrowinning. In the zinc electrowinning process, the cast Pb-Ag (0.3~1%) anode is widely used in the zinc electrowinning industry due to the advantages of easy availability of raw materials and good stability, but the cast Pb-Ag (0.3~1%) anode At the same time, there are also the following problems: 1) The useless power consumption due to the high oxygen evolution overpotential accounts for about 20-30% of the to...