METHOD OF WAELZ PROCESS OF ZINC CAKES Russian patent published in 2013 - IPC C22B19/00 C22B1/02 

FIELD: metallurgy.

SUBSTANCE: method of Waelz process of zinc cakes involves mixing and pelletisation of zinc cakes together with solid carbon-containing material and Waelz process of pelletised material. With that, to the mixing stage there supplied is mixture of calcium- and magnesium-containing materials at content of magnesium oxide in mixture of 20-50% and ratio in the charge (CaO+MgO)/SiO₂=2÷4. Pelletisation of the mixture is performed together with solid carbon-containing material with fineness of less than 2 mm. Waelz process of pelletised material is performed with addition of carbon-containing material with fineness of more than 2 mm at the temperature of 1100°C. As carbon-containing material, wastes of coal and oil-processing industries are used.

EFFECT: increasing furnace capacity and reducing carbon-containing material consumption.

2 cl, 1 dwg, 5 tbl, 5 ex