废旧钢材和边角余料,通称为废钢铁。废旧钢材和边角余料的利用是我们国家长期坚持的“勤俭建国”方针的一项重要内容。“先利用,后回炉”是节约钢材的一种好办法。它是指把可以直接利用的废钢铁,从废钢中挑选分离出来,经过整理加工直接用于生产和维修。确实不能利用的再回炉炼钢。随着钢材供求关系的变化,在废旧钢材和边角余料的再生利用上 Scrap steel and scrap more than the corner, commonly known as scrap iron. The utilization of scrap steel and scrap materials is an important part of our country’s long-established policy of “building a thrift economy”. “The first use, after the furnace” is a good way to save steel. It refers to the scrap steel that can be directly used, separated from scrap selection, after finishing processing directly for the production and maintenance. Really can not be used to return to steelmaking. With the changes in the relationship between supply and demand of steel, scrap steel and scrap more than the expected recycling of materials