1．钢质外结晶器的试验连续铸造工艺,生产铸管情况如图1所示铁水在内、外结晶器的强制．冷却下成形、凝固,并连续不断地拉出。外结晶器的工作条件很恶劣:内壁接触一千多度的高温铁水,外壁接触高压的冷却水,它的工作壁和转角处容易炸裂,一般炸裂情况如图2所示。这使冷却水渗入铁水中发生爆炸,而不能拉管。几年来这是我厂铸管生产的一大难关,也是国内同行业工厂的一大关键。各厂在这方面作了不少的试验研究工作。一般大中型工厂采 1. Test of steel outside the mold continuous casting process, the production of cast pipe as shown in Figure 1, including hot and cold, outside the mold force. Cooled, formed, solidified, and continuously pulled out. Working conditions outside the mold is very harsh: the inner wall of more than a thousand degrees of contact with high temperature hot metal, outer wall contact with high pressure cooling water, its wall and corner of the work easy to burst, the general burst situation shown in Figure 2. This makes the cooling water into the molten iron explosion, but can not pull the tube. Over the past few years this is my factory cast pipe production a major obstacle, but also the domestic industry with a major factory key. The factory made a lot of experimental research in this area. General large and medium-sized mining plant