A continuous refining device for blister copper by fire method

Abstract

The invention provides a crude copper fire continuous refining device comprising a furnace body and a floss hole formed in the top of the furnace body. The furnace body is internally provided with a charging oxidation zone, a reduction zone and a casting zone which are partitioned through partition walls, but the bottoms of the charging oxidation zone, the reduction zone and the casting zone communicate mutually; and the reduction zone is located between the charging oxidation zone and the casting zone. The crude copper fire continuous refining device has the advantages of lower energy consumption, environmental friendliness, high automation level, high production efficiency and the like; crude copper continuous feeing and anode copper continuous casting can be achieved, the oxidation andreduction processes are conducted simultaneously during running, the operation time can be shortened, the utilization rate of the crude copper fire continuous refining device is increased, meanwhile,the flue gas volume and the flue gas ingredient are stable, centralized treatment can be achieved, and waste heat is recycled.

Description

technical field [0001] The invention relates to the technical field of nonferrous metal metallurgy, in particular to a continuous refining device for blister copper by fire method. Background technique [0002] The pyrometallurgical process of copper generally includes three steps: copper concentrate smelting, copper matte blowing and blister copper refining. The blister copper produced by copper matte converting generally contains 98.5-99.5% copper, and the remaining impurity elements include sulfur, oxygen, iron, arsenic, antimony, zinc, tin, lead, bismuth, nickel, cobalt, etc., and usually also contain selenium, tellurium , gold and silver and other rare metals and precious metals. Impurity elements will have adverse effects on the conductivity and mechanical properties of copper, while valuable elements such as scattered metals and precious metals need to be comprehensively recycled to improve resource utilization. On the one hand, the purpose of blister copper fire re...

AI Technical Summary

Problems solved by technology

Among them, the reverberatory furnace has a low degree of automation, manual intubation redox labor intensity, and more flue gas leakage lead to poor working environment, high energy consumption, and low production efficiency; the rotary refining furnace has a high level of automation, large processing capacity, and production The efficiency is high, but because of its deep melting pool, small heating area, and slow material conversion, it is not suitable for processing cold materials, and the converter control system is complicated; the tilting furnace combines the characteristics of the reverberatory furnace and the rotary refining furnace, but the shape of the furnace body Special, complex structure, high investment, and the furnace body tilts during operation, which has a great impact on the stability of the furnace roof and furnace wall

More importantly, these three widely used blister copper pyro-refining processes have a common disadvantage, that is, periodic operations. The refining process is divided into four cycles: feeding and melting period, oxidation and slag removal period, reduction period and casting period.

When periodic operation is adopted, the flue gas in the oxidation period contains SO 2 High concentration needs to be treated separately, high concentration of CO in the flue gas during the reduction period requires secondary combustion, fluctuating fluctuating flue gas volume in the four cycles makes centralized treatment impossible, and the follow-up flue gas treatment system is complicated, and the heat taken away by the flue gas cannot be recovered

At the same time, periodic operations lead to long operation time per furnace, large fuel consumption, low utilization rate of casting equipment, and affect production efficiency

Images