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1. (WO2018058952) METHOD OF REMOVING CARBON IN COPPER-CONTAINING MOLTEN IRON BY USING VORTEX TO DRAW IN LIMESTONE

Pub. No.:    WO/2018/058952    International Application No.:    PCT/CN2017/082309
Publication Date: Fri Apr 06 01:59:59 CEST 2018 International Filing Date: Sat Apr 29 01:59:59 CEST 2017
IPC: C21C 7/068
Applicants: NORTHEASTERN UNIVERSITY
东北大学
Inventors: ZHANG, Ting'an
张廷安
DOU, Zhihe
豆志河
ZHANG, Zimu
张子木
LIU, Yan
刘燕
NIU, Liping
牛丽萍
LV, Guozhi
吕国志
Title: METHOD OF REMOVING CARBON IN COPPER-CONTAINING MOLTEN IRON BY USING VORTEX TO DRAW IN LIMESTONE
Abstract:
A method of removing carbon in a copper-containing molten iron by using a vortex to draw in limestone. The method belongs to the technical field of metallurgy, and comprises the specific steps of: (1) feeding copper-containing molten iron, obtained by adding a carbonaceous reducing agent into copper slag for reduction, and ensuring that the temperature is ≥1450°C, into an induction furnace; (2) centrally stirring the copper-containing molten iron to form a vortex with a height-diameter ratio of 0.5 to 2.5; (3) spraying limestone powder into the center of the vortex while the central stirring continues, and performing eccentric stirring after the limestone powder has been sprayed so as to allow more homogeneous mixing of generated CO2 in the vortex; (4) enabling the limestone powder to be directly drawn into the molten iron by the vortex to fully react with the molten iron and to obtain decarbonized copper-containing molten iron and molten slag; and (5) discharging the decarbonized copper-containing molten iron and the molten slag in different layers. The method is simple, requires little investment, is capable of saving energy and protecting the environment and is low in cost, has high economic value, achieves decarbonization, and protects a copper element in the copper-containing molten iron against loss through burning.