Flame spraying process and apparatus
First Claim
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1. Apparatus for forming a coherent refractory mass on a surface, the apparatus comprising:
- a combustion chamber having an outlet adjacent to a surface to be coated;
a single supply line for transporting one or more metallic combustible powders, one or more non-combustible materials and air, oxygen or a combination of the two to the combustion chamber;
a mixing chamber disposed downstream of the supply line and upstream of the combustion chamber for combining the one or more metallic combustible powders, one or more non-combustible materials and air, oxygen or a combination of the two in a mixture; and
an igniter disposed in the combustion chamber and operative to ignite the combustible powder and oxidizer in the mixture in the combustion chamber to cause the metallic combustible powder in the mixture to react in an exothermic manner with the oxidizer in the combustion chamber, and release sufficient heat to form a refractory mass of melted or softened non-combustible materials, which is projected from the combustion chamber and against the surface to be coated so that the mass adheres durably to the surface.
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Abstract
A process, apparatus and material composition for forming a coherent refractory mass on a surface wherein one or more non-combustible materials are mixed with one or more metallic combustible powders and an oxidizer, igniting the mixture in a combustion chamber so that the combustible metallic particles react in an exothermic manner with the oxidizer and release sufficient heat to form a coherent mass of material under the action of the heat of combustion, and projecting this mass against the surface so that the mass adheres durably to the surface.
68 Citations
18 Claims
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1. Apparatus for forming a coherent refractory mass on a surface, the apparatus comprising:
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a combustion chamber having an outlet adjacent to a surface to be coated; a single supply line for transporting one or more metallic combustible powders, one or more non-combustible materials and air, oxygen or a combination of the two to the combustion chamber; a mixing chamber disposed downstream of the supply line and upstream of the combustion chamber for combining the one or more metallic combustible powders, one or more non-combustible materials and air, oxygen or a combination of the two in a mixture; and an igniter disposed in the combustion chamber and operative to ignite the combustible powder and oxidizer in the mixture in the combustion chamber to cause the metallic combustible powder in the mixture to react in an exothermic manner with the oxidizer in the combustion chamber, and release sufficient heat to form a refractory mass of melted or softened non-combustible materials, which is projected from the combustion chamber and against the surface to be coated so that the mass adheres durably to the surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. Apparatus for forming a coherent refractory mass on a surface, the apparatus comprising:
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a combustion chamber having an outlet adjacent to a surface to be coated; a single supply line for transporting one or more metallic combustible powders, one or more non-combustible materials and air, oxygen or a combination of the two to the combustion chamber; a mixing chamber disposed downstream of the supply line and upstream of the combustion chamber for combining the one or more metallic combustible powders, one or more non-combustible materials and air, oxygen or a combination of the two in a mixture; and an electric arc igniter disposed in the combustion chamber and operative to ignite the combustible powder and oxidizer within the mixture in the combustion chamber to cause the metallic combustible powder in the combustion chamber to react in an exothermic manner with the oxidizer, and release sufficient heat to form a refractory mass of melted or softened non-combustible materials, which is projected from the combustion chamber and against the surface to be coated so that the mass adheres durably to the surface. - View Dependent Claims (10, 11, 12, 13)
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14. Apparatus for forming a coherent refractory mass on a surface, the apparatus comprising:
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a combustion chamber having an outlet adjacent to a surface to be coated; a single supply line for transporting one or more metallic combustible powders, one or more non-combustible materials and air, oxygen or a combination of the two to the combustion chamber; a mixing chamber disposed downstream of the supply line and upstream of the combustion chamber for combining the one or more metallic combustible powders, one or more non-combustible materials and air, oxygen or a combination of the two in a mixture; and a plasma arc igniter disposed in the combustion chamber and operative to ignite the combustible powder and oxidizer in the combustion chamber to cause the metallic combustible powder in the mixture to react in an exothermic manner with the oxidizer, and release sufficient heat to form a refractory mass of melted or softened non-combustible materials, which is projected from the combustion chamber and against the surface to be coated so that the mass adheres durably to the surface. - View Dependent Claims (15, 16, 17, 18)
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Specification