The order has been received by a consortium of Mitsubishi Corporation (MC) and Larsen & Toubro (L&T). MC will be responsible for th eproject management as a consortium leader, and L&T will undertake civil construction, erection and local supply. Hitachi Ltd. will design, engineer, and supply electrical equipment/automation system.
The plant is to produce a wide range of steels, including high-quality gradesfor use in the automotive and household appliance industry, as well as for API grades. The stands of the finishing mill are being equipped with pair cross technology for optimum control of profile and flatness. The completed rolling mill is due to be handed over to SAIL at the end April 2018.
Scope of supply
Primetals Technologies is responsible for the design, engineeringand supply of the mechanical equipment of the hot-rolling mill. This includes a reheating furnace, a single-stand roughing mill, a seven-stand finishing mill, two down coilers, auxiliary systems and equipment for the roll workshop. Fourstands of the finishing mill are equipped with pair cross technology. In pair cross mills the upper and lower work and back-up rolls are crossed toward each other pairwise, so that the two pairs of rolls form anarrowX when viewed from above. This permits optimum adjustment of the roll gap contour and thus a fine control of the strip profile. Depending on the angle set, the crown of the strip can be varied in a wider range than can be achieved in a conventional 4Hi mill with work roll bending only. Worldwide, approximately 150 finishing mills equipped with pair cross stands are in service.
Improvement for the customer
SAIL, in which the Indian state is a majority stockholder, is currently engaged in an ambitious expansion program that aims to boost production capacity from 14 to 24 million metric tons of steel a year. The Rourkela Steel Plant, established in 1955 as the first integrated steelworks in India, will increase its production capacity from the current level of 5.6 million tons to 10.8 million tons of steel. The new hot strip mill from Primetals Technologies is to produce hot rolled strip, some of which will be further processed in a new cold-rolling mill that is also being planned. The range of products includes carbon steels for the construction industry, low and medium-carbon steels, LPG cylinder steel and API grade steels, including X100, up to high-grade products that meet the requirements of the automotive industry. The maximum coil weight is 35 metric tons.
(Source: Primetals Technologies Ltd.)