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US 4,307,197 AGranted
Refractory insulating veneer
AssigneeNalco Chemical Company
InventorsJohn G. Daniel, David S. Kerr, Frederick V. Reven
Life of this patent
Estimating the term…
Abstract
A tundish veneer composition comprising about 45-80 percent by weight of MgO, about 1-7 percent by weight of a refractory clay filler, about 1-15 percent by weight of a refractory glass wool fiber, about 3-10 percent of aqueous colloidal silica binder, and optionally, up to about 15 percent by weight of graphite, a foaming agent, or a dispersing agent.
Claims9
A tundish veneer composition comprising:
- about 45 to 80 percent by weight of MgO;
- about 1 to 7 percent by weight of a refractory clay filler;
- about 1 to 15 percent by weight of a refractory glass wool fiber;
- and,
- about 3 to 10 percent of aqueous colloidal silica binder.
2 more elements
A tundish veneer composition comprising:
- about 70 to 80 percent by weight of dead-burned MgO;
- about 2 to 7 percent by weight of a refractory kiln dried kaolin clay;
- about 5 to 10 percent by weight of silica-alumina glass wool fiber;
- about 5 to 10 percent by weight of a flaky large grain graphite;
- about 0.1 to 0.5 percent by weight of a foaming agent for introducing entrained air bubbles into the composition;
- and,
- about 5 to 7 percent by weight of an aqueous colloidal silica binder.
4 more elements
A tundish veneer composition comprising:
- about 75 percent by weight of dead-burned MgO;
- about 2 percent by weight of a refractory kiln dried kaolin clay;
- about 10 percent by weight of silica-alumina glass wool fiber;
- about 6 percent by weight of graphite;
- about 0.2 percent by weight of trimethyltallow ammonium chloride;
- about 6 percent of an aqueous colloidal silica binder containing about 37.5 percent by weight SiO.sub.2 ;
- and,
- about 0.5 percent by weight of an agent for dispersing said glass wool fiber.
5 more elements
A method of insulating and protecting tundish surfaces comprising:
- combining about 45 to 80 percent by weight of dead-burned MgO, about 1 to 7 percent by weight of a highly refractory kiln dried kaolin clay, about 1 to 15 percent by weight of glass wool fiber, and, about 3 to 10 percent of aqueous colloidal silica binder to make a gunning mix;
- gunning said mixture with the required amount of water onto a tundish interior surface to produce a tundish veneer;
- and,
- drying said tundish veneer.
1 more element
Dependencies are inferred from the claim text.