Optimized Solution for the Kr-Impeller

by Dr. Patrick Tassot, J. Wang, J. Sun

Publisher - CALDERYS ASIA PACIFIC

Category - General Novel

Current demands of steelmaking need improvement of technological solutions in desulfurization of hot metal with maintenance of high efficiency and minimization of refining cycle time, stable ironmaking with sulphur content lower than 0.002 %. Simplifying the converter's function has increased refining efficiency in 2 ways. It has virtually eliminated the need to reblow heats to achieve target chemistries, and it has shortened refining times. The desulphurization process is much more favourable to carry on in pig iron than in steel. Therefore the desulphurization process was transferred to vessels, which originally served only as transport vessels, i.e. iron ladles. In Asia a very efficient method consists adding the reactant at the surface of the pig and dispersing of it using mechanical agitation, the so called Kanbara Refining (KR). The biggest advantage of the method is good desulfurization dynamic conditions, the desulfurization rate is high (>90%). In this paper we will concentrate on the optimization of the impeller. Specific Finite element modelling and new concept of material and installation have contribute to a rise in the performance lastly in Taiwan.

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