METHOD FOR DECARBURIZATION OF HIGH-CARBON COPPER-CONTAINING MOLTEN IRON BY BLOWING CO2

摘要

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.