Extraction of zinc-containing products from metallurgical sludge of low zinc content using a method of filtration combustion

The possibility of recovery of zinc and zinc-containing compounds from real technogenic waste, metallurgical sludge containing about 1.0% zinc by a filtration combustion method was studied. This method due to its features is distinguished by low energy consumption and can be effectively applied in cases where the use of traditional methods is economically unjustified. In a wide range of control parameters conditions of combustion of slurry samples, the degree of extraction of zinc-containing products were found. The optimal process conditions were determined, under which recovery of zinc from poor sludge (～1.0% Zn) was possible.