Design and application of secondary cooling water dynamic control system for bloom caster of alloy steel

Secondary cooling water dynamic control system for bloom caster of alloy steel in Laigang was designed based on residence time model and advanced control strategy of multiple model controller.In the system,interlock protection system of L1 and L2 and data diagnosis and processing functions were included.The control system also offers technological interface for adding new steel grade in production and/or revising secondary cooling parameters by user.Quality track and metallurgical effect analysis show that operation of the control system was precise and stable,no surface crack,mid-crack and center crack were in bloom,and center soundness and equiaxed crystallinity of bloom were improved.