GAS BURNER DEVICE OF ROTARY KILN FOR REDUCING CHROMIUM ORE

摘要

PURPOSE:To effectively utilize hydrocarbon having high reducing power for reduction of chromium ore by installing a lance which bombards a gaseous fuel contg. the hydrocarbon to the raw material pellet layer in a rotary kiln to said rotary kiln separately from a main burner. CONSTITUTION:The lance 4 is provided separately from the main burner 2 at the time of heating and reducing the chromium ore pellet layer 3 in the rotary kiln 1. A coke oven gas 5 contg. the hydrocarbon and air 6 for combustion are supplied to the main burner 2 and only the coke oven gas 5 is supplied to the lance 4, by which said gas is bombarded to the pellet layer 3. The distribution ratio of the gas 5 is preferably adjusted to about 30-70% of the burner 2 side. The reducibility of the chromium ore pellets is thereby improved by about 5-10%.