A New Lance Design for BOF Steelmaking
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UCTION AND AIM OF WORK
THE worldwide increase in demand for steel has encouraged countries such as India with a good raw material base to seriously consider significantly augmenting their production capacity. Such an increase in the capacity would address the projected increase of per capita consumption of steel and help India’s projected economic development. TATA Steel, as part of its growth strategy, feels that the proposed capacity increase must be supported by advancements of the present day’s steelmaking processes with emphasis on improving steel quality and shortening of the processing time. Typical of Indian raw materials, the phosphorous content of the hot metal charged into the LD vessel at TATA Steel is as high as 0.22 pct. This level of input phosphorous is very high as compared to the world average given the fact that the demands for the lower phosphorus in the finished products for certain critical grades of steel are severe. Hence, at TATA Steel, efforts have been on studying the entire steelmaking process from a more fundamental point of view using numerical, experimental, and analytical tools in order to consistently produce steel with a low turndown phosphorous (
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