A Novel Proposal for Manufacturing Steel: OSRAM's CO2 Steel Making Process
Abstract
In this paper, we propose a concept to utilise Carbon-dioxide for Steel-Making and would like to name it after the first author as OSRAM-CO2-SM process. We found in our lab experiments that the carbon content in high-carbon ferro-chrome metallic powders has come down from 7% to 1% when pure CO2 gas with partial pressure of 1 atmosphere is passed through a horizontal retort furnace maintained at 1100o C for 24 hours. Our results clearly demonstrated that decarburisation can be very effective, when CO2 is used at temperatures where it is unstable and the Boudouard reaction which is endothermic in nature is more favoured. Based on these findings, we propose the OSRAM-CO2-SM process in which CO2 shall be used as the decarburising agent. CO2 is to be passed into a specially designed converter provided with heating mechanism to maintain the contents from blast furnace in a molten state for decarburisation of the melt. The out coming hot gases consisting of CO has to be burnt in a combustion chamber with stochiometric proportions of pure O2 to produce CO2 at a partial pressure close to 1 atm.The process will be extremely useful as it involves reuse and recycle of CO2 and in turn would reduce the overall amount of CO2 discharged into the atmosphere.
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