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Applications in Iron and Steel Making
Published in Nirupam Chakraborti, Data-Driven Evolutionary Modeling in Materials Technology, 2023
The argon–oxygen decarburization (AOD) process is an economic and efficient way of making stainless steel. In AOD process relatively cheap high carbon ferrochrome is used instead of more expensive low carbon ferrochrome as the source of Cr. Here an argon–oxygen mixture is injected at the bottom of the steel making vessel. In some cases pure oxygen is replaced by oxygen enriched air. Some specially designed copper tuyeres are used for the gas injection, which leads to a faster rate of carbon oxidation, leading to a relatively short processing time and enhanced productivity.
Primary and Secondary Steelmaking
Published in Vladimir B. Ginzburg, Metallurgical Design of Flat Rolled Steels, 2020
Argon-oxygen decarburization (AOD) process is primarily designed for stainless steel production. The process is conducted at atmospheric pressure. It consists of the following steps [2]: Charging the electric-arc furnaceMelting, tapping, deslagging and weighing the heatPouring the heat into the AOD vesselDecarburization by blowing argon and oxygen with fluxes to be added during blowingAdding ferrosilicon and stirringSample inspection with necessary alloy adjustmentTapping.
Secondary Steelmaking Processes
Published in Vladimir B. Ginzburg, Steel-Rolling Technology, 1989
Argon-oxygen decarburization (AOD) process is primarily designed for stainless steel production (Fig. 9.9). The process is conducted at atmospheric pressure. It consists of the following steps [1]: Charging the electric-arc furnaceMelting, tapping, deslagging and weighing the heatPouring the heat into the AOD vesselDecarburization by blowing argon and oxygen with fluxes to be added during blowingAdding ferrosilicon and stirringSample inspection with necessary alloy adjustmentTapping.
Themed issue on ‘converters in metals processing’
Published in Mineral Processing and Extractive Metallurgy, 2019
In the case of steel converters, basic linings have been advantageously used considering the impurities like S. Oxygen blowing has become common. The implications of bottom blowing, top blowing and combined blowing have all been well-investigated. The lance design has undergone tremendous improvements. The steel converter concept has evolved into Argon Oxygen Decarburization (AOD) for the decarburisation of high alloy steels like stainless steel. In the case of Peirce-Smith converters for copper, improved design in the form of Teniente converter has come up. Refractory design to withstand the erosion by sulphide melts and molten fayalite slags have been developed. The technology evolution has been progressing steadily.