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1. (WO2018058953) METHOD OF REMOVING CARBON IN HIGH-CARBON COPPER-CONTAINING MOLTEN IRON BY INJECTION OF CARBON DIOXIDE

Pub. No.:    WO/2018/058953    International Application No.:    PCT/CN2017/082310
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
NIU, Liping
牛丽萍
DOU, Zhihe
豆志河
LIU, Yan
刘燕
LV, Guozhi
吕国志
Title: METHOD OF REMOVING CARBON IN HIGH-CARBON COPPER-CONTAINING MOLTEN IRON BY INJECTION OF CARBON DIOXIDE
Abstract:
A method of removing carbon in a high-carbon copper-containing molten iron by injection of carbon dioxide. The method comprises the following steps: (1) feeding the high-carbon copper-containing molten iron into an induction furnace; (2) injecting carbon dioxide gas into the high-carbon copper-containing molten iron, and stirring; (3) stopping injection when the mass percent of the carbon in the high-carbon copper-containing molten iron is less than or equal to 0.2%; and (4) post-processing carbon monoxide to generate carbon dioxide for recycling, and separating the copper-containing molten iron from molten slag. According to the method, the injected carbon dioxide reacts with carbon in a melt to generate carbon monoxide. After escaping, the carbon monoxide is combusted to regenerate carbon dioxide, and the carbon dioxide is recycled. The carbon dioxide is a weak-oxidation gas and cannot react with copper. The carbon dioxide also has dephosphorization function and desiliconization function.