Abstract
Since the amount of slag generated in ferrous and non-ferrous metals production isconsiderably large, its effective utilization is one of the most significant issues in the industries. Therefore the great effort has beenmade to develop their new applications.In this paper, the current situation and problems on this matter are discussed.In the steel industry, most of ferrous slag is now utilized as a law material for cement production, road construction and so on. Non-ferrous slags are becoming widely used in these days, the usage is however far from satisfactory level in respect both of quantity and price. It is important for these industries to resolve these problems in order to develop new processes or to produce new materials which have higher values added.
