Processing of steel galvanizing waste using the method of melt immersion

Abstract

The article describes the methods of steel galvanizing waste processing by immersion in a zinc melt, furnaces and devices for processing hard zink and drosses into usable products for zink pots, the methods for zinc extraction from waste and their use in industry. It is demonstrated that the hot-dip galvanizing wastes is a serious resource in reducing the consumption of primary zinc, what is more their use does not entail deterioration in the quality of the hot-dip zinc coating. However, not all technologies and types of equipment for processing zinc-containing waste are equally effective. It is appropriate to use vibro-deburring closed machines for processing dross (liming), and furnace with a “roof” heated for processing hard zinc, and in the latter case, according to the technology of fractional loading of reagent – aluminum scrap – processing floating aluminum-iron intermetallic compounds carnallite-cryolite fluxing agent.