top of page

               VIEW OUTLINE - PDF 


Start Date : 1 Dec,2024
End Date   : 5 Dec,2024
Duration    : 5 Days
Price          : $ 3,995 ( SAR 14,981.25 )


Course Content:

Module # 1. BACKGROUND

  • Reheating during steel rolling
  • Methods to reduce the fuel cost
  • Primary causes of non-optimal furnace operation
  • Prior work on reheating furnace control strategies


Line and reheating furnace performances

  • Mill layout
  • Reheating furnace
  • Billets/blooms movement through the reheating furnace
  • Cycle time of walking hearth furnaces
  • Positions of billets/blooms

Heat balance inside the furnace

Definition of heat transmission

  • Temperature differences between billets/blooms
  • The unit length of the heating time period is need as follows
  • Estimation of billet/bloom temperature

Heat transfer 

  • Heat transfer from gas to billets/blooms 
  • Heat transfer coefficient
  • Thermal conduction

Thermal Properties of Materials

  • Specific heat
  • Emissivity/Absorption rate
  • Thermal conductivity

Furnace Modeling

  • Mesh construction
  • Heat balance modeling in each component.
  • Heat transmission between billets/blooms and the hearths
  • Local temperature of the hearths
  • Interaction between billets/bloom


Billet/Bloom initial orders and their parameters

  • Operational conditions
  • Model of thermal property of material
  • Computer specie cation for simulation

Performance of the simulation model

  • Trend of simulated temperature
  • Difference of simulated sectional temperature
  • Heat transmission in billet longitudinal direction

Selection of appropriate mesh size

  • Relationship between mesh size and simulated temperature
  • Mesh size and time increments

Effect of thermal conductivity on center temperature

  • Thermal conductivity effect
  • Impact of thermal conductivity on billet temperature

Parameters selection for optimization

  • Estimating extraction temperature of billets/blooms
  • Selection of model and parameters for reheating furnace control


Optimization Problem

  • Objective function  
  • Decision variables
  • Constraints
  • Optimization method
  • Outline of the optimization method
  • Determining the initial solution
  • Unit increment of furnace temperature
  • Determination of the schedule matrix and the upper limit of temperature change
  • Effective zone and time period targeting for estimating billet temperature changes
  • Classed searching for efficient temperature changes
  • Updating the feasible region
  • Decrease phase
  • Final treatment for the optimal control solution
  • Initial performance check

Shortening computation time

  • Amply and lower limiter for furnace temperature changes
  • Selective billet tracking
  • Effects of selective tracking, amplifying and lower limiter

Overall Control Performance

  • Fundamental example
  • Effects of initial furnace temperature
  • Effects of inserting billets with higher goal temperatures
  • Initial control action when unexpected stoppage occur
  • Adjustment of furnace temperature


  • Conclusion summary
  • Insight for better furnace structure based on simulation results


Course Methodology:

The course uses a mix of interactive techniques such as brief presentations by the consultant and the participants, group exercises and case studies. The course also includes live instructions, video presentations, and practical examples & case studies. The trainer uses up-to-date training techniques and a variety of training methods, to give all participants the best opportunities for learning, including:

  • Class Session
  • Group Discussions
  • Case studies
  • Simulation
  • Evaluation


Reheating Furnace Walking Hearth Operation and Optimization Training

    bottom of page