Abstract
The technique of aluminum addition into molton steel is very important on the steel processing of low carbon aluminum killed steels. In the first place, the yield of aluminium from a given addition is not constant since these steels are usually in the low carbon ranges, furthermore a very narrow range of Sol. Al value is required in such steels in view of the formability of their end products.
The steelmaking shop at Fukuyama Works, Nippon Kokan K. K. has been producing large quantities of continuously cast slabs having stable Sol. Al value and excellent surface and interior quality from those killed steels treated with ladle additions of aluminium wire by means of the “Al-wire feeder” developed by the company. As a result of application of this method, the standard deviation of Sol-Al content in steel has been reduced from 0.011 to 0.008 percent.
