关于连轧管机组几个工艺问题的讨论

目前连轧管机组已成为我国无缝钢管生产的主力机型。就连轧管机组管坯加热炉炉型的选择、脱管/定径工序的分、合布置问题,对比分析了国内外连轧管机组的异同,并设想在限动芯棒上增加导向段以降低生产运行成本;提出了有关应用热送热装、控制冷却等技术节约能源、提高产品质量的想法。特别指出:使用环形炉加热管坯不应该是连轧管机组的唯一选择。

Discussion on Several Technologica Issues Relating to Mandrel Pipe Mil

Up to now, the mandrel pipe mill has been used as the main type of pipe mills in domestic seamless steel tube-making circles, similarities and differences between mandrel pipe mill at home and abroad are analyzed, involving such issues as determination of type of the billet heating furnace, the combined and separate arrange- ments of the extracting/sizing process. It is proposed as a concept that a guide section be incorporated with the retained mandrel in a bid to reduce the operation costs. Also proposed are some ideas with respect to saving energies and improving product quality via such techniques as material hot-charging and hot-conveying, and controlling of cooling condition, etc. At last, it is emphasized that for billet heating for the mandrel pipe mill, the rotary hearth furnace should not be regarded as the only choice.