唐山钢厂在用土铁炼好钢的实践中,已经摸索出一套如下的炉前看硫的经验。 (1)1959年初时,要求钢的含硫量不大于0.20％。硫在0.20％左右时样子比较容易看,如钢中硫超过0.20％,钢水在模内凝固时有一圈不易凝固,形成比较亮的一条线。这不易凝固的线越宽,凝固得越慢,就说明硫越高。 In practice, Tangshan Iron and Steel Mills has developed a set of following experience of looking at sulfur in front of furnaces. (1) At the beginning of 1959, the sulfur content of steel is required not to exceed 0.20%. When the sulfur is about 0.20%, it looks easier to see, for example, when the sulfur in the steel exceeds 0.20%, the molten steel will not solidify in a circle when it is solidified in the mold to form a relatively bright line. This is not easy to solidified the line is wider, the slower the solidification, it shows that the higher the sulfur.