THE EFFECTIVE USE OF TECHNICAL GASES AND ENERGY-EFFICIENT TECHNOLOGIES FOR MANUFACTURING ELECTRIC STEEL
DOI:
https://doi.org/10.18198/j.ind.gases.2004.0117Keywords:
alternative source of energy, oxygen, natural gas, liquid steel degassing, dust collectionAbstract
Steelmakers from the Moldova Steel Works, Rybnitsa, Moldova (MSW) have been seriously striving for lower costs and higher quality of the steel. This is successfully achieved by an intense use of the alternative sources of energy, such as natural gas and coke contributing to the oxidation reactions. The optimal use of the alternative energy has considerably reduced the electricity consumption, which stands at present at only 390 kW•h per 1 t of liquid steel with the oxygen consumption being 38.5 nm3 per 1 t of liquid steel. Development of new value-added steel products has necessitated the MSW to recently commission a 125 t vacuum degasser. The article outlines an innovative application of «dry» mechanical vacuum pumps which ensure the effective operation of three-stage «deep degassing» system. For the dust collection there has been implemented a new improved multichannel duster with feedbacks. Degassing of liquid steel with the use of mechanical vacuum pumps has allowed the MSW to adjust the production of high carbon high quality wire rods.
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