Rail Steel Production at Evraz ZSMK with MSR
1. Danieli Centro Met,Danieli Officine Meccaniche SpA2. Danieli Automation,Danieli Officine Meccaniche SpA
摘要：Evraz ZSMK Novokuznetsk（Russian Federation） CC n.2 has been revamped by Danieli in November 2012,keeping same CC radius and leading to 25% increased productivity（140 ton/h） with significantly improved internal quality for a wide production mix,including rail steel.In this paper it will be presented the caster design and the quality of the cast product.Tundish design has been optimized through a CFD study,aiming to low temperature difference among strands and low velocity at meniscus and on refractory,in order to avoid slag entrapment and refractory wear.One of the main technological packages which allowed the above performances was the Mechanical Soft Reduction,performed with advanced mechanical and software solutions,allowing optimal results in terms of internal quality also during fly-tundish.In order to reach a steady bloom thickness regardless of the steel grade and casting speed,hard reduction technology was applied,slightly improving internal quality.Caster was equipped with the state-of-art of automation package,including automatic continuous tundish temperature measurement,mould powder additions,secondary cooling,MSR automatically managed,giving to customer the chance to pursue the zero operator philosophy.