Method of and vessel for removing samples from a bath of molten metal

US4603590A · kind A · utility

Assignee

• Aktiengesellschaft der Dillinger Hüttenwerke · DE

Inventors

• Gotthard Staats · Beckingen, DE
• Horst Thome · Nalbach, DE

Key dates

• Filing date: May 29, 1985
• Grant date: Aug 5, 1986
• Expiry date: May 29, 2005

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S73/09
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A sample from a bath of killed molten steel which contains aluminum is removed with a vessel having a cover which undergoes at least partial disintegration on contact with molten metal and allows molten metal to fill the vessel as soon as the latter is lowered to a preselected level. The internal space of the vessel contains a strip of magnesium and a strip of zirconium. Magnesium evaporates with an explosion as soon as it is contacted by molten metal and thereby enters into a chemical reaction with oxygen in the vessel while also expelling the remaining air through the partially disintegrated cover to further reduce the likelihood of reaction between aluminum and air which is entrained with the immersed vessel. Zirconium dissolves in the metal which fills the vessel and bonds oxygen close to the surface surrounding the internal space of the vessel. The vessel has an inner envelope consisting of foundry sand and a suitable binder, a metallic outer envelope, and a liner which is surrounded by the inner envelope and includes a quartz tube as well as a bottom wall of sheet metal. When the molten metal hardens, the resulting billet is cut in half and the thus exposed surface is analyze…