Analysis of Temperature loss of Hot Metal during Hot Rolling Process at Steel Plant
Journal Title: International Journal of Modern Engineering Research (IJMER) - Year 2014, Vol 4, Issue 8
Abstract
Hot metal is travelling a long distance (around 126 m) between roughing mill and a Steckel finishing mill during hot rolling process in a steel plant which resulted in heat loss. Since, the metallurgical qualities of finished product are closely related to the accurate control of temperature of the material during the hot rolling process, the heat in the furnaces maintains the slab temperature at high level at the cost of more fossil fuels. Temperature of the work piece influences spread appreciably. Lower the temperature of raw material input, greater is the spread. Similarly, higher the temperature, lesser is the spread. Lesser speed of rolling results in greater spread and vice-versa. Hence, temperature is playing a vital role in hot rolling process. Temperature loss of semi finished work pieces between the mill stand is inevitable until it protected from the open atmosphere. If a low-emissivity material (radiation shield) is placed between two surfaces, the radiation heat transfer can be considerably reduced. The shield increases the thermal resistance to radiation heat flow. Because radiation is a major source of heat loss at the temperatures involved (around 1060° C.) Thermal shields may be fixed over the path of the hot strip to reduce heat loss and in particular such heat shields can be employed to reduce the head-to-tail temperature variation along the length of a transfer bar. The result of this study is the development of an effective procedure for computer calculation of processes of hot rolling to optimize its parameters
Authors and Affiliations
K. K. Anantha Kirthan , S. Sathurtha Mourian , M. Vignesh , A. Nisanth
Keywords
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