A method for removing carbon from high-carbon copper-containing hot metal by injecting CO2

Abstract

A method for injecting CO2 to remove carbon content from high-carbon copper-containing hot metal belongs to the field of metallurgy. The method includes the following steps: (1) introducing high-carbon copper-containing molten iron into an induction furnace; (2) blowing CO2 gas into the high-carbon copper-containing molten iron and stirring; (3) when the high-carbon copper-containing molten iron is When the mass percentage of carbon is ≤0.2%, the injection is stopped; (4) CO is post-processed to generate CO2 for reuse; copper-containing molten iron and slag are separated. In this method, the introduced CO2 gas reacts with the carbon in the melt to generate CO. After the CO escapes, it is burned to regenerate CO2 and reused. As a weak oxidizing gas, CO2 does not react with copper and also has dephosphorization properties. , The role of desiliconization. This method has a simple process, adding a stirring system to the induction furnace, which is energy-saving, environmentally friendly, and low-cost. It utilizes greenhouse gases and has high economic value and environmental protection. It can not only achieve the purpose of decarbonization, but also protect the copper element. Not burned.

Description

technical field [0001] The invention belongs to the field of metallurgy, in particular to a CO injection 2 A method for removing carbon from high-carbon copper-containing iron water. Background technique [0002] With the rapid development of copper smelting technology, the production of blister copper in my country has increased rapidly. At the same time, the stockpiling of copper slag has also increased greatly. As of 2015, the stockpiling of copper slag in my country has reached more than 270 million tons. The storage of such a large amount of waste not only occupies a large amount of land and pollutes the environment, but also contains a large amount of valuable metal elements in the copper slag, and the copper and iron content is higher than the grade of the ore. The waste of copper slag is also a waste of resources. [0003] At present, the utilization of copper slag is still focused on extracting copper and iron separately, and the recovery value is limited. The sim...

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Problems solved by technology

Patent application number 201010108198.7 proposes an electromagnetic induction furnace blowing CO 2 Clean steel smelting method for decarburization, using CO injection 2 The gas is decarburized, and the amount of decarburization is controlled by the furnace gas analysis system, but it does not involve the application of valuable metal elements, and there is no decarburization and copper preservation involved.

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