中国有色冶金

Copper matte bottom blowing technology has become a current development trendin copper smelting industry. The smelting process is divided into fully hot material, cold and hot mixture materialand fully cold material. The heat balance in the furnace is different for different raw materials, and the oxygen concentration ofthe gas entering the furnace is different.Qinghai Copper Industry Co., Ltd. is the first domestic smelting company that adopts continuous blowing process treating the full-cooled raw material for copper production. This article analyzes the influence of oxygen concentration on the bottom blowing of copper smelting based on the companys production practice.The results show that increasing the effective flux of a single oxygen lance, reducing the number of oxygen lances, and controlling the oxygen concentration of 36% to 38% are important measures to prolong the life of the oxygen lance and shorten the time for shutting down and replacing the oxygen lance;a reasonable oxygen concentration should be used to control the appropriate three-phase thickness to ensure that all production indicators of the converting furnace. It is recommended that the oxygen-enriched concentration corresponding to cold copper matte blowing, hot copper matte blowing, and cold and hot copper matte mixed blowing is 36%~38%, 28%~32%, 31%~34%.