Main Features of a Modern Bar and Light Section Mill Feb01

Main Features of a Modern Bar and Light Section Mill...

Main Features of a Modern Bar and Light Section Mill The objective of a bar and light section mill is to reheat and roll steel billets into bars and light sections. The production of bar and light sections in these mills is subject to constant change. There is growing demands on the quality of these products as well as on the flexibility and cost effectiveness of these mills. This has necessitated the development of new and innovative technologies and processes. Modern bar and light section mills are high speed mills capable of rolling bars and light sections of special bar quality grades and engineering steels at high production rates, while keeping investments and operating costs at the reasonable levels. Modern bar and light section mills are expected to meet the following requirements. High mill availability coupled with high productivity and high yields. Meeting the need of low maintenance. Meeting the need of lower energy consumption. Close dimensional tolerances. Negative tolerances (In sectional weight). No variation in dimensions throughout the length. Uniform physical properties. For achieving these demanding requirements, many important features are incorporated in the modern bar and light section mills. Some of these are described below. Reheating furnace – Modern bar and light section mills are equipped with energy efficient walking beam furnaces which are normally computerized controlled. These reheating furnaces uniformly heat the billets to the target temperatures at the required production rates and without skid marks and without cold spots. These furnaces are capable of receiving cold or hot billets as the charge material in the furnace. The modern reheating furnaces have the features of (i) superior heated billet quality, (ii) better heating efficiency, (iii) very low fuel consumption, (iv) minimum scale loss, contributing to achieving high material yield, (v) low...