Claims
- 1. An insulating material suitable for use as a header in continuous molten metal casting and comprising about:
- (a) 15-40 wt % lime;
- (b) 15-40 wt % siliceous component;
- (c) 10-70 wt % delaminated vermiculite or spodumene or lithium aluminate or mixtures thereof;
- (d) 0-55 wt % wollastonite; and
- (e) 0-10 wt % organic fiber.
- 2. An insulating material as claimed in claim 1 comprising about:
- (a) 15-35 wt % lime;
- (b) 15-35 wt % siliceous component;
- (c) 12-25 wt % delaminated vermiculite;
- (d) 15-50 wt % wollastonite; and
- (e) 1-10 wt % organic fiber.
- 3. An insulating material as claimed in claim 1 comprising about:
- (a) 15-25 wt % lime;
- (b) 15-25 wt % siliceous component;
- (c) 12-20 wt % delaminated vermiculite;
- (d) 30-50 wt % wollastonite; and
- (e) 1-8 wt % organic fiber.
- 4. An insulating material as claimed in claim 1 wherein said material is substantially asbestos-free.
- 5. An insulating material as claimed in claim 1 wherein said material is made by mixing lime, the siliceous component, delaminated vermiculite, wollastonite, and organic fiber with water to form an aqueous slurry; molding the aqueous slurry into a wet shape; expelling water from the wet shape; heating the wet shape in the presence of steam; and drying the wet shape to remove free water.
- 6. An insulating material as claimed in claim 5 wherein said material has a matrix comprising calcium silicate hydrate.
- 7. An insulating material as claimed in claim 5 wherein said material has a matrix comprising predominantly tobermorite.
- 8. An asbestos-free insulating material consisting essentially of about:
- (a) 15-40 wt % lime;
- (b) 15-40 wt % silica;
- (c) 10-70 wt % delaminated vermiculite or spodumene or lithium aluminate or mixtures thereof;
- (d) 0-55 wt % wollastonite; and
- (e) 1-8 wt % organic fiber.
- 9. An insulating material as claimed in claim 8 wherein said insulating material is made by mixing lime, silica, delaminated vermiculite, wollastonite, and organic fiber with water to form an aqueous slurry; molding the aqueous slurry into a wet shape; expelling water from the wet shape; heating the wet shape above 100.degree. C. in the presence of steam; and drying the wet shape to remove free water.
- 10. An asbestos-free insulation material made by the steps of:
- (a) mixing a dry mixture comprising about 15-25 wt % lime, about 15-25 wt % silica, about 12-20 wt % delaminated vermiculite, about 30-50 wt % wollastonite, and about 1-8 wt % organic fiber with water to form an aqueous slurry;
- (b) molding the aqueous slurry into a wet shape;
- (c) expelling water from the wet shape;
- (d) heating the wet shape above about 100.degree. C. in the presence of steam; and
- (e) drying the wet shape to remove free water.
CROSS REFERENCE TO RELATED PATENT APPLICATION
This application is a continuation-in-part of U.S. Ser. No. 123,336 filed Nov. 19, 1987 and entitled "Casting Aluminum Alloys with a Mold Header Comprising Delaminated Vermiculite.", now U.S. Pat. No. 4,773,470.
US Referenced Citations (4)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
123336 |
Nov 1987 |
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