METHOD FOR CONTINUOUS PROCESSING OF IRON AND ZINC CONTAINING DUSTS AND ALLOYS Russian patent published in 2006 - IPC C22B19/30 C22B19/38 C22B7/02 

FIELD: ferrous metallurgy, possibly processing of iron and zinc containing materials being waste products, for example dusts and alloys of gas scrubbers of open hearth and blast furnaces, of converters.

SUBSTANCE: method comprises reduction annealing at presence of reducing agent in rotary tubular furnace without air access in controlled-temperature mode for producing metal plated iron-containing product and zinc product. Mixture of initial material and reducing agent is preliminarily processed at temperature no less than 400°C till humidity content no more than 0.05% and then such mixture is fed into rotary tubular furnace. Reduction annealing in such furnace is realized due to contact free heating with use of heat exchanger mounted in said furnace due to supplying combustion products into said heat exchanger. Zinc condensate is trapped and cooled for producing zinc product in the form of metallic zinc.

EFFECT: possibility for producing zinc product in the form of metallic zinc at lowered consumption of reducing agent.

2 cl, 1 tbl