论文部分内容阅读
我厂是生产连续铸铁管的专业厂,由于近几年生铁、焦炭的购入较杂,造成铁水温度低、化学成份不稳定。为使这种低质铁水在结晶器内有较好的拉铸熔合工艺性,我们采用了超短结晶器(按《特种铸造手册》设计,φ200铸铁管外结晶器长应为510mm～530mm,而我厂为430mm)。它除了有较好的拉铸工艺外,还有制造容易,维修方便,拉铸力小,排除抱管故障容易等优点。但长期以来φ200铸铁管内壁沟陷问题一直没有得到解决。83年5月我们分析了沟陷形成机理,在不改变结晶器长度情况下较好地解决了这一问题。
I plant is the production of continuous cast iron pipe factory, due to the pig iron, coke purchase more mixed in recent years, resulting in low temperature of molten iron, chemical composition is not stable. In order to make this kind of low-quality hot metal in the mold have better casting and fusing process, we use a very short mold (according to “Special Casting Manual” design, φ200 cast iron pipe outside the mold length should be 510mm ~ 530mm, And my factory is 430mm). In addition to its good casting process, it is easy to manufacture, easy maintenance, small drawing force, easy to rule out the problem of holding the tube. However, the problem of ditching the inner wall of φ200 cast iron pipe has not been solved for a long time. 83 May We analyzed the formation mechanism of groove ditch, which could be well solved without changing the mold length.