A Comparison of Current Descaling Systems To Developing Linearized Systems

• Aliyah Ellis
• Kyle Palmer
• Eamonn O’Connor
• Agnieszka Szudy

Descaling of hot rolled steel is affected by several parameters. In industry, it is normal to remove this scale as it is hot rolled with a line of hydraulic nozzles that spray the steel as it rolls by. The buildup of unnecessary scale can cause the grade of the steel to be downgraded. Descaling can reduce the percent of steel downgraded which results in a higher quality of product. The impact force from the spray as well as the shock from the heat change helps to crack and dislodge the scale that forms when hot rolled. The normal set up of nozzles has a lead angle of 10° which is the angle from perpendicular between the nozzle spray and the steel. There is also an offset angle of 15° to help remove interference between the two nozzles. It has been found that there is interference between nozzles that have this offset angle. This analysis looks at the impact force of a linear setup and how that will affect the impact force on a steel plate. It is found that there is an average peak force of 5.18 N with a standard deviation of 0.55 N at comparable points between the triplicate trials of the three nozzles. The spray distribution is seen to have peak impact forces at the edges of the width of the spray. When compared to the traditional setup it is observed to have more evenly distributed forces with the peak values changing by as much as +/- 5%. The traditional setup also has interference issues from spray next to it which is resolved with a linear setup.