COURSE OVERVIEW

This practical and highly-interactive course includes reallife
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.