Friday 20 April 2018

Rolling Mill Plant

Typical Working Of a Hot Rolling Mill Plant

Steel rolling mill plant is a mechanized system where steel in mass is processed into large slabs and rods. Later these intermediate or semi-finished components are processed further to form finished components. From setup to production each and every stage requires precision and complete attention.

Nonetheless, all of the imperfections in a steel bar/rod and the slabs due to poor rolling, improper heating, irregular thicknesses, surface defects, and the like can be avoided with the best possible use of a hot rolling mill.

Here is a concise illustration to help you get an idea about the working of hot rolling mill plant utilized in a typical steel plant:

Construction: The hot rolling mills comprise of individual units that serve their specific physical processes of shaping, molding, heating, compressing, etc. It features re-heating units, de-scaling (cooling) sprays, roughing mill rolls, edging (compressing) molds, croppers (cutters), and finishing units. These units run in complete harmony to work upon the semi-molten steel, in order to form the rods of desired dimensions.

The rolling mill basically contains three-high rolls, running from 24 to 32 inches in diameter, and an oxygen gas torch, that cuts the semi-molten steel into bars. The cooling and backup system for these rolls is homogenized with a complex arrangement of coilers, motors, gears and process control systems.

Operation: The walking beam furnace reheats the beam with combustion airs coming to over 1000° F. The hot metal at that point goes into the enclosures of descaling units that spritz, 1500 psi pressurized cold water, to extinguish the steel. Thus, removing iron oxide formed on its external surface.

Here, a scale breaker is brought in to prune the thickness of the slab further, by heavy rolls. They are later processed via vertical rolling stands that help roughen the edges, and keep uniformity of the product. The molten metal is then cast into molds, which form the final bars. They are finally surface-treated for finishing and are additionally processed for packaging.

Conclusion

In the conclusion, the entire hot rolling mill plant process is performed, with the help of latest tools and technologies to ensure the fine quality of the finished products.

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