Baker, R and Normanton, A S and Davies, M W (1981) Developments in Oxygen Steelmaking Processes with particular reference to the Value of Bath Stirring. In: Proceedings of International Symposium on Modern Developments in Steelmaking, 1981, NML, Jamshedpur.
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The paper outlines the steps and disciplines necessary to ensure optimum economic processing of liquid metal via the oxygen steelmaking route. Particular consideration is given to the options available for treating a medium phos-phorus hot metal, with variable and often high silicon levels, to meet increasingly stringent requirements of a modern, high tempo steel plant linked to a continuous casting plant. The several procedures available for presenting a consi-stent, controlled charge blend, free from slag, plus the measures necessary to ensure maximum reproducibility of steel alloying practice are mentioned but major emphasis is placed on the in-vessel blowing and process control procedures. Here the conventional top blown practice with process control and end point location features is comp-ared with the fully bottom blown and top blown bottom-stirred systems. The latter practices are shown to offer advantages in terms of improved decarburisation control, more controlled slag-metal chemistry, improved oxygen efficiency and, most importantly, increased yield and alloying efficiency. The top blown bottom-stirred system offers potentially greater flexibility in terms of an ability to control slag/metal reactions over a wider range of final steel carbon levels and finishing temperature than the fully bottom blown process and does not suffer the same acute problems with respect to hydrogen pick-up, but is at an earlier stage of commercial development. Metallurgical investigations conducted on 1 tonne and 3 tonne pilot plants and a 120 tonne production vessel are described in some detail and recent trials on a 160 tonne vessel will be presented.
|Item Type:||Conference or Workshop Item (Paper)|
|Uncontrolled Keywords:||phosphorus; silicon; liquid; slag-metal chemistry|
|Divisions:||Metal Extraction and Forming|
|Deposited By:||Sahu A K|
|Deposited On:||08 Jun 2012 09:56|
|Last Modified:||08 Jun 2012 09:56|
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