Method of protecting carbon-containing component parts of metallurgical units from oxidation
First Claim
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1. A method of producing carbon-containing component parts of metallurgical units which are protected against oxidation, comprising the steps of:
- (a) impregnating a porous carbon-containing component part with orthophosphoric acid to substantially fill the pores thereof with said orthophosphoric acid;
(b) drying said component part until the moisture is completely removed from the pores of the carbon-containing material;
(c) further impregnating the thus orthophosphoric acid-impregnated component part with an organoelement compound based on an element selected from the group consisting of Si, Ti, and Al, which organoelement compound is capable of reacting with orthophosphoric acid to form phosphates of said elements; and
(d) heating the thus further impregnated component part to a temperature at which said organoelement compound reacts with orthophosphoric acid to form the corresponding phosphates, said phosphates being formed both in the pores and on the surface of the carbon-containing material.
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Abstract
A method of protecting carbon-containing component parts of metallurgical units from oxidation comprises impregnating a component part with orthophosphoric acid to form a glassy mass in the pores of the component part when the latter is heated, drying the component part until the moisture is removed from the pores thereof, additionally impregnating the component part with an elemental organic compound comprising an element: Si, or Ti, or Al and capable of forming a phosphate, and heating the impregnated component part to the temperature at which phosphates are formed.
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Citations
18 Claims
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1. A method of producing carbon-containing component parts of metallurgical units which are protected against oxidation, comprising the steps of:
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(a) impregnating a porous carbon-containing component part with orthophosphoric acid to substantially fill the pores thereof with said orthophosphoric acid; (b) drying said component part until the moisture is completely removed from the pores of the carbon-containing material; (c) further impregnating the thus orthophosphoric acid-impregnated component part with an organoelement compound based on an element selected from the group consisting of Si, Ti, and Al, which organoelement compound is capable of reacting with orthophosphoric acid to form phosphates of said elements; and (d) heating the thus further impregnated component part to a temperature at which said organoelement compound reacts with orthophosphoric acid to form the corresponding phosphates, said phosphates being formed both in the pores and on the surface of the carbon-containing material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification