METHOD FOR HOLDING AND RAISING TEMPERATURE OF COPPER FLASH SMELTING FURNACE

摘要

PROBLEM TO BE SOLVED: To keep or raise the temp. in the whole furnace to a prescribed temp. by supplying powdery coke together with the air or oxygen-enriched air into a shaft from a concentrate burner, spattering a part of the powdery coke in a settler in the uncombusting state and burning the powdery coke, in the case of keeping and raising the temp. in the furnace at the charge stopping time of charging material or raising the temp. in the furnace after repairing. ;SOLUTION: This operating method is the one, with which the charging material of copper concentrate, flux and the other are supplied together with fuel and the air or the oxygen-enriched air by using the concentrate burner from the top part of the shaft. When the copper concentrate as the raw material is stopped to charge into the flash smelting furnace 1 and the furnace is made to the temp. keeping state, the powdery coke is supplied from the concentrate burner 9 at the top part of the shaft 2 and a part thereof is burnt in the shaft 2 and uncombusting powdery coke is spattered in the settler 3 to keep the temp. in the wide range over the settler 3 and a waste heat boiler 11. The target keeping temp. is 1250°C in the settler. The temp. in the whole furnace body can be raised and kept without disposing many oil burners in the settler.;COPYRIGHT: (C)2000,JPO