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A mathematical model is proposed for the mill arrangement equivalent to semi continuous type in a hot strip mill. The rolling schedule is arranged so that a slab is rolled from 230mm into 60mm in bar thickness by 3 passes roughing with only one reverse mill and 60mm into 1.2mm, 2.0mm, and 2.5mm in final thickness by 7 passes finishing. The possibility of rolling in this case is analytically examined in due consideration of slab weight, temperature change, rolling power, rolling capacity, and rolling speed. As a result, the rolling of the comparably heavy slab with 30t/m in unit weight is enabled, and the temperature condition is sufficiently fulfilled. The length of the rolling mill line can be geometrically shortened very much in comparison with the case of other type hot strip mill.

transactions of the iron and steel institute of japan/transaction of the iron and steel institute of japan

Examination of Slab Temperature Change, Rolling Power and Rolling Capacity in a Hot Strip Mill with Mill Arrangement Equivalent to Semi Continuous Type