Claims
- 1. A ladle consisting essentially of a rigid metallic outer casing, at least one layer of permanent refractory material adjacent said casing, and a unitary, integrally-formed expendable inner lining of refractory material, said expendable lining made of a mix consisting of:
- ______________________________________ % by Wt.______________________________________Silica (SiO.sub.2) 16Alumina (Al.sub.2 O.sub.3) 1.5Iron Oxide (Fe.sub.2 O.sub.3) 3Lime (CaO) 1Magnesia (MgO) 75Accessory Oxides 1.5Loss on Ignition 2______________________________________
- having a thermal conductivity of less than about 4.2 BTU in/.degree. F..sup.2 hr. at 1600.degree. F. mean temperature and being chemically compatible with the molten metal to be placed in the ladle.
- 2. A unitary, integrally-formed expendable lining of refractory material for the interior of a ladle said refractory material consisting of:
- ______________________________________ % by Wt.______________________________________Silica (SiO.sub.2) 16Alumina (Al.sub.2 O.sub.3) 1.5Iron Oxide (Fe.sub.2 O.sub.3) 3Lime (CaO) 1Magnesia (MgO) 75Accessory Oxides 1.5Loss of Ignition 2______________________________________
- and having a thermal conductivity of less than about 4.2 BTU in/.degree. F. ft..sup.2 hr. at 1600.degree. F. mean temperature and being chemically compatible with the molten metal to be placed in the ladle.
Parent Case Info
This application is a continuation, of application Ser. No. 622,367 filed Dec. 5, 1990, now abandoned which in turn is a continuation of application Ser. No. 377,592 filed Jul. 10, 1989, now abandoned.
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Number |
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Date |
Kind |
4042229 |
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Aug 1977 |
|
4043543 |
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|
4760039 |
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Jul 1988 |
|
4839317 |
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Jun 1989 |
|
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Entry |
BNZ advertisement, Dense Castables and Gunning Mixes, BNZ Materials Inc., Sep. 1988. |
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Continuations (2)
|
Number |
Date |
Country |
Parent |
622367 |
Dec 1990 |
|
Parent |
377592 |
Jul 1989 |
|