Continuous Rolling of Narrow Strip with Planetary mill as Roughing mill

Jor the production of narrow strip of less than 600 mm in width, a hot strip mill with a planetary mill as roughing mill and three to four 4-high mills as finishing mill was suggested. The features of the said mill are less in number of mill stands, lower in investment and easily operate. Hot strip mills of 750 and 450mm has been designed which can be used to produce strips of 1.25mm minimum thickness, up to 620 and 320mm in width and up to 6.5 and 3 tons in coil weight respectively. The planetary mill used is of the clam type which we have developed and used successfully twice in a pilot plant. The important features of clam type planetary mill are: higher in mill rigidity, lower in weight simpler in synchronous mechanism of upper and lower planetary rolls. The feasibility of using this hind of hot strip mill to roll narraw strip has been discussed.