Metal refining with refractory coated pipe
AssigneeRichland Industrial, Inc. of Columbia, SC
InventorHarry P. Sullins
Life of this patent
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Abstract
Disclosed is a heat resistant composite comprising a refractory coating on a metal substrate. The refractory coating is provided by mixing a refractory mortar with water, impregnating a water absorbent web of fibrous material with the liquid mixture, placing at least one layer of the impregnated web on a surface of the substrate as a coating, and drying the coating to remove the water and cause the refractory mixture to chemically bond. The substrate may be a pipe protected by the coating for use in injecting a refining agent beneath the surface of a molten metal composition comprising a scrap metal such as copper or aluminum.
Claims29
A method of refining a molten metal composition comprising:
- mixing a dry refractory mortar with water to provide a liquid refractory mixture;
- impregnating a water absorbent web of fibrous material with said mixture;
- coating a surface of a metal pipe by placing at least one layer of said impregnated web on said surface as a coating;
- drying said coating to remove said water from said web and said liquid refractory mixture and to cause said liquid refractory mixture to set and dry as a chemically bonded refractory composition adhered to said metal surface and having said web embedded therein, said dry refractory mortar being suitable for laying refractory brick in the lining of metal refining furnaces and for causing said liquid refractory mixture when dried to form said chemically bonded refractory composition at ambient temperature and a ceramically bonded refractory composition at a fusing temperature above said ambient temperature;
- and,
- injecting a refining agent through said coated metal pipe into an area beneath the surface of a bath of said molten metal composition.
A method of refining a molten metal composition comprising:
- mixing a dry refractory mortar with water to provide a liquid refractory mixture;
- impregnating a water absorbent web of fibrous material with said mixture;
- coating at least a portion of the exterior suface of a metal pipe by placing at least one layer of said impregnated web on said surface portion;
- drying said coating to remove said water form said web and said liquid refractory mixture and to cause said liquid refractory mixture to set and dry as a chemically bonded refractory composition adhered to said surface portion of the metal pipe and having said web embedded therein, said metal pipe being made of steel, said fibrous web comprising a porous organic material, and said dry refractory mortar being suitable for use in laying refractory brick in the lining of metal refining furnaces and for causing said liquid refractory mixture when dried to form said chemically bonded refractory composition at ambient temperature and a ceramically bonded refractory composition at a fusing temperature above said ambient temperature;
- and,
- injecting a refining agent through said coated metal pipe into an area beneath the surface of a bath of said molten metal composition.
Dependencies are inferred from the claim text.