Steel Making and Rolling (Metalworking): Process & Applications, Rod and Bar Rolling, Hot Rolling mill, Plate Mill, Hot Strip Mill, Rolling Mill for Steel Bars

Description:

The steelindustry has taken note of the continued growth in steel imports and a number ofprojects have been planned and are under implementation. It is estimated thatin the next 2-3 years about 10 million tons of new steel capacity will becreated. Finished steel products are broadly classified as flat products andlong products. In rolling mills, intermediate steel products are given theirfinal shape and dimension in a series of shaping and finishing operations.  Most of the slabs are heated in reheatingfurnaces and rolled into final shape in hot– or cold–rolling or finishingmills.   While some products (e.g.reinforcement bars, steel plates) only require hot-rolling, some others mayrequire both hot– and cold–rolling (steel for cars and white-goods). The primaryrolling mill for flat products is the hot strip mill. This mill by its inherentnature is of very high capacity, generally producing a minimum of 2 milliontons per year. Recent development of the thin slab casting and rollingtechnique has given rise to mills of lower capacity of 1 million tons per year.These mills however are coupled to the steel making casting unit and cannot beset up on a standalone basis. Standalone Rolling /Processing Mills usingpurchased/imported inputs for production of long & flat rolled steelproducts including coated sheet products. The industry is currently operatingat 70 per cent utilization of processing plants, and hopes that would be ableto achieve full capacity utilization by the year-end.

Rolling ofsteel is one of the most important manufacturing processes for steel. It isusually the first step in the processing of steel after it is made and casteither in Ingot or continuous cast product in a steel melting shop.

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