PROCESSING METHOD OF ZINC-CONTAINING METALLURGICAL WASTE Russian patent published in 2014 - IPC C22B19/38 C22B1/02 C22B7/00 

FIELD: metallurgy.

SUBSTANCE: processing method of zinc-containing metallurgical waste involves mixing of waste with coke fines, pelletisation of charge and further performance of a Waelz process in a tube-type furnace. Besides, calcium hydroxide in the amount of 20-30% of silica content in the charge and coke fines with the size of less than 1 mm in the amount of 13-17% of the charge weight are added to the charge at mixing. Charge pelletisation is performed so that granules with the size of 2-4 mm and humidity of 10-12% are obtained. Waelz process treatment is performed at the temperature of 900-1000°C.

EFFECT: improving furnace capacity and reducing flow rate of coke fines of zinc-containing metallurgical waste, for example dusts of electric-arc furnaces.

2 cl, 1 dwg, 5 tbl, 5 ex