作者：TATSUYA OUCHI;

作者单位：itt.edu

刊名：Taikabutsu Overseas

ISSN：0285-0028

出版年：2001-01-05

卷：21

期：4

起页：270

止页：275

分类号：TQ175

语种：英文

关键词：

内容简介

Molten steel tapped out of converters and electric furnaces is treated in a secondary refining process before casting. In many cases this secondary process involves introducing inert gas (especially Ar) through a porous plug. The purpose of inert gas bubbling is as follows (1) Uniformity of molten steel temperature in the ladle, (2) homogenization of molten steel components, (3) removal of nonmetallic inclusions (purification of the molten steel) and (4) improvement of refining effects. In order to attain these objectives, the porous plug must be reliable, safe and durable during bubbling. Therefore, a rigorous quality control test is required to check individual gas permeability. In this paper, the failures of porous plugs are outlined, together with a discussion of countermeasures in operation.