Composition and method for manufacturing steel-containment equipment
AssigneeMagneco/Metrel, Inc.
InventorsSubrata Banerjee, Charles W. Connors, Jr.
Life of this patent
Estimating the term…
Abstract
An improved casting composition utilizes an aqueous finely dispersed silica binder to provide reduced drying times and reduced cracking and explosion of troughs, runners and other containment equipment designed for use by the iron and steel industry. The composition is prepared by mixing 8-14% by weight of the aqueous silica binder with 55-90% by weight of a refractory base material and up to 35% by weight of silicon carbide. Preferably, the composition will also include 5-10% by weight of calcined alumina, 1-10% by weight of microsilica, and 0.02-1% by weight of a setting agent. Troughs and runners manufactured from the composition also exhibit increased strength and improved resistance to oxidation, corrosion and erosion.
Claims19
A method for manufacturing steel containment equipment, comprising the steps of:
- forming a pumpable casting composition by mixing a compound comprising 55-90% by weight of a granular base material selected from the group consisting of calcined clay, mullite, brown fused alumina, tabular alumina and mixtures thereof, 5-20% by weight of calcined alumina, and 8-14% by weight of a silica binder formed from a dispersion of 15-70% by weight colloidal silica in water, the colloidal silica having an average particle diameter of 4-100 millimicrons;
- transporting the casting composition to a mold assembly using a concrete pump;
- and
- molding the casting composition to form a steel containment device.
A method for manufacturing steel containment equipment, comprising the steps of:
- forming a pumpable casting composition by mixing a composition comprising 55-90% by weight of a granular base material selected from the group consisting of calcined clay, mullite, brown fused alumina, tabular alumina and mixtures thereof, 5-20% by weight silicon carbide, and 8-14% by weight of a silica binder formed from a dispersion of 15-70% by weight colloidal silica in water;
- transporting the casting composition to a mold assembly using a concrete pump;
- and
- molding the casting composition to form a steel containment device.
A casting composition for use in the construction of troughs and runners for the iron and steel industry, comprising:
- 5- 85% by weight of a granular base material selected from the group consisting of calcined clay, mullite, brown fused alumina, tabular alumina, and mixtures thereof;
- 5-25% by weight silicon carbide;
- and
- 8-14% by weight of a binder formed from a dispersion of 15-70% by weight silica in water, the silica consisting essentially of colloidal silica having an average particle diameter of between 4-100 millimicrons;
- mixed together to form a damp, pumpable mixture.
Dependencies are inferred from the claim text.