Refractory coating for metal
AssigneeRichland Industrial, Inc.
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.
Claims33
A heat resistant composite comprising a refractory coating adhered to a metal substrate, said composite being provided by:
- 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 said substrate by placing at least one layer of said impregnated web on said surface as a coating;
- and,
- 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 substrate 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.
A heat resistant composite comprising a refractory coating adhered to a metal pipe, said composite being provided by:
- 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 surface of said pipe by placing at least one layer of said impregnated web on said surface portion;
- 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 surface portion of the metal pipe and having said web embedded therein;
- said metal pipe being made of a carbon steel,
- said fibrous web being made of burlap,
- 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.
A heat resistant composite pipe comprising:
- a metal pipe;
- and,
- a chemically bonded refractory coating adhered to at least a portion of the exterior surface of said pipe and having embedded therein a web of water absorbent, non-refractory material such that said composite pipe is bendable at ambient conditions through an arc of 90.degree. having a radius of at least about 36 inches without fracture of said refractory coating or separation of said refractory coating from said pipe;
- said chemically bonded refractory coating having been formed by wrapping said exterior surface portion with a length of said web impregnated with a liquid refractory mixture made by mixing with water a dry refracory mortar suitable for laying refractory brick in the lining of metal refining furnaces, and drying said wrapping to remove said water from said web and said liquid refractory mixture and to cause said liquid refractory mixture to set and dry as said chemically bonded refractory coating, the composition of said dry refractory mortar being such that said liquid refractory mixture when dried forms said chemically bonded refractory composition at ambient temperature and a ceramically bonded refractory composition at a fusing temperature above said ambient temperature.
Dependencies are inferred from the claim text.