COURSE OVERVIEW

 This practical and highly-interactive course includes real-life case studies and exercises where participants will be engaged in a series of interactive small groups and class workshops. 

This course is designed to provide delegates with a detailed and up-to-date overview of roll mills reheating furnace (walking hearth) operation and optimization. It covers the mill layout and reheating furnace (walking hearth); the billets/blooms movement through the reheating furnace, cycle time of walking hearth furnaces and positions of billets/blooms; and the heat balance inside furnace, heat transmission, temperature differences between billets/blooms; and estimation of billet/bloom temperature. 

 

Further, the course will also discuss the thermal radiation between billet/bloom and furnace walls; the heat transfer between billets/blooms, the furnace atmosphere and the hearths; the heat transfer coefficient, thermal conduction, thermal properties of materials and specific heat; the emissivity/absorption rate, thermal conductivity and mesh construction; the heat balance modeling in each component, factors from furnace walls, hearths and ceiling to a mesh; the heat transmission between billets/blooms and the hearths; and the local temperature of the hearths and interaction between billets/blooms. 

 

During this interactive course, participants will learn the reheating during steel rolling; the methods of reducing the fuel cost; the primary causes of non-optimal furnace operation and prior work on reheating furnace control strategies; the effect of thermal conductivity on center temperature and parameters selection for optimization; estimating extraction temperature of billets/blooms; the selection of model and parameters for reheating furnace control; the optimization of furnace operation; the initial solution, unit increment of furnace temperature and schedule matrix and upper limit of temperature change; the effective zone and time period targeting for estimating billet temperature; the classified searching for efficient temperature changes; and the final treatment for the optimal control solution.