RU2352541C2 - Carbon-bearing mass - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: carbon-bearing mass includes fire-resistant granular filler, graphite, carbon-bearing solid and liquid components with high carbon residue, antioxidant additives. According to invention antioxidant additives used in fire-resistant mass are aluminium and multiphase ingredient of the following phase composition, wt %: Al₂OC 37.0-45.0, Al₈B₄C₇ 20.0-28.0, Al₄O₄C 15.0-22.0, Al₂O₃ 4.0-12.0, Al₄C₃ 1.0-11.0 at the following ratio of fire-resistant mass components, wt %: multiphase ingredient 0.25-5.0, graphite 4.0-20.0, antioxidant additive from Al 1.0-3.0, solid carbon-bearing component 1.0-4.7, liquid carbon-bearing component 0.8-1.5, fire-resistant granular filler - the rest to 100. Multiphase ingredient is introduced in the form of finely dispersed powder with particle size of not more than 60 mcm, which has been produced by crushing and grinding of mixture baked at the temperature of 1150-1450°C in neutral argon medium and consisting of boron oxide B₂O₃, graphite C and aluminium Al, taken in ratio of B₂O₃:C:Al equal to 1:(2.0-3.5):(5.0-6.0).

EFFECT: production of carbon-bearing mass for manufacture of products with improved physical-technical and operational properties, reduction of their cost, prolongation of accident-free service life of brickwork.

2 cl, 24 ex, 5 tbl

Description

The invention relates to the production of refractories from a carbon-containing mass, and in particular to the composition of a carbon-containing mass, and can be used to obtain carbon-containing products.

It is known to use a pre-synthesized additive of boron aluminum carbide Al ₈ B ₄ C ₇ to improve the properties of refractories based on silicon carbide SiC. The additive is obtained by firing at a temperature of 1800-1950 ° C in an argon gas of Ar powders B ₄ C and Al in the presence of a phenolic resin as a binder, taken in the ratio 1: (0.1-0.6) :( 0.4- 1,5), patent CN 1369463, С04В 35/565, publication date September 18, 2002.

The disadvantages of the known composition are: the use of high temperatures for the synthesis of Al ₈ B ₄ C ₇ , the use of phenolic resins and the allocation of substances harmful to human health and the environment.

The known composition of periclase carbon-containing mass with the introduction of antioxidant additives. Products made of periclase carbon-containing mass are intended for lining metallurgical units. The refractory mass consists of magnesian clinker, graphite, as well as ligaments and antioxidant additives (Al and Al-Mg) in an amount of 5 wt.%, Introduced in excess of 100%. Carbon-containing refractories of the indicated mass with a carbon content of 15-20% have an apparent density of 2.87 ÷ 2.91 g / cm ³ , a flexural strength at 1400 ° C of 9.1 ÷ 10.5 MPa (patent JP 8217529, С04В 35 / 043, publication date 08/27/1996).

The disadvantages of the known composition are: the use of pyrophoric explosive antioxidant additives based on Al-Mg alloy, their increased content in the composition of the refractory, the lack of protection of graphite from oxidation, which leads to deterioration of the technical characteristics of carbon-containing refractory products during operation, including due to the formation of large amounts of Al ₄ C ₃ easily susceptible to hydration.

A carbon-containing mass is known containing an antioxidant synthesized at a temperature of 1500 ° C and above, obtained from the group of compounds based on aluminum Al, boron B, graphite C, aluminum carbide Al ₄ C ₃ , boron carbide B ₄ C and boron oxide B ₂ O ₃ . The additive reduces the oxidation of carbon in carbon-containing products (patent JP 7018255, С04В 35/10, publication date 01/20/1995).

The disadvantages are: the use of antioxidant additives synthesized at temperatures above 1500 ° C; the content in the synthesized antioxidant additive of a large amount of aluminum carbide, prone to hydration; achieving a positive effect only when you enter in large quantities (at least 5 wt.%) of the synthesized antioxidant additives with the addition of Al ₂ O ₃ .

Closest to the claimed is a carbon-containing refractory mass set forth in patent RU 2171243, class. СВВ 35/035, publ. 07/27/2001, which includes a refractory granular filler, graphite, carbon-containing components with a high coke residue: powdered phenolic resin as a solid, ethyl cellosolve, furfuryl alcohol and urotropin as a liquid, antioxidant additives from aluminum and boron-containing compounds.

The disadvantages of the closest analogue (prototype) is the use of antioxidant additives in the form of a mechanical mixture with a large number of components, the mixed multicomponent antioxidant additive does not prevent the formation of aluminum carbide in quantities that are dangerous for the degradation of the refractory properties due to hydration instability of aluminum carbide, the use of boron carbide in the antioxidant composition additives significantly increases the cost of refractory, slightly reduces the burnup of the refractory, but does not provide protection during operation, from devastating effects of water vapor and condensates, there are significant deviations - the scatter of technical properties, which negatively affects the life of the refractory due to local destruction of carbon-containing refractories, especially in the lining zones, which are subject to extreme values of operating production factors during operation.

The objective of the proposed technical solution is to obtain a carbon-containing mass for the manufacture of carbon-containing products with improved physical, technical and operational properties by increasing the efficiency of the multiphase ingredient, reducing the cost of products, reducing the risk of local destruction of the carbon-containing refractory and increasing the duration of trouble-free operation of the lining.

The problem is achieved in that the carbon-containing mass, including refractory granular filler, graphite, carbon-containing components with a high coke residue: powder phenolic resin as a solid, ethyl cellosolve, furfuryl alcohol and urotropin as a liquid, antioxidant additives from aluminum and boron-containing compounds, according to the invention, according to the invention as antioxidant additives contains aluminum aluminum and a multiphase ingredient, including boraluminium carbide, aluminum hydroxycarbides, carbide Luminos and corundum phases at a ratio, wt.%:

Al ₂ OC 37.0-45.0 Al ₈ B ₄ C ₇ 20.0-28.0 Al ₄ About ₄ C 15.0-22.0 Al ₂ About ₃ 4.0-12.0 Al ₄ C ₃ 1.0-11.0 in the following ratio of components, wt.% multiphase ingredient 0.25-5.0 graphite 4.0-20.0 antioxidant additive from Al 1.0-3.0 solid carbon component 1.0-4.7 liquid carbon component 0.8-1.5 refractory granular filler the rest is up to 100

The problem is also achieved by the fact that the carbon-containing mass contains a multiphase ingredient, which is represented by a fine powder with a particle size of not more than 60 microns, fired at a temperature of 1150-1450 ° C of a mixture of boron oxide, graphite and aluminum, in the ratio of B ₂ O ₃ : C: Al equal to 1: (2.0-3.5) :( 5.0-6.0). The presence of a multiphase ingredient provides an effective improvement in the performance of technical properties that are important for increasing the service life of linings made of carbon-containing refractories, by increasing the heat resistance to values 33-37 of heat exchange in the 1300 ° C mode - water, the ultimate tensile strength at 1300 ° C to 21, 8-23.0 MPa, reducing the depth of decarburization of products at 1600 ° C to 1.5-1.7 mm.

The advantages of the carbon-containing mass and the refractory from it are: the presence in the composition of the multiphase ingredient Al ₄ C ₃ in quantities of not more than 1-11 wt.%, Not dangerous for hydration and degradation of the properties of the refractory, the introduction of the multiphase ingredient into the composition of the refractory mass in minimal quantities to achieve a positive effect - improving the properties of carbon-containing refractory products.

The synthesis of a multiphase ingredient, including compounds of aluminum oxycarbide Al ₂ OS, aluminum boron carbide Al ₈ B ₄ C ₇ , aluminum oxycarbide Al ₄ O ₄ C, corundum Al ₂ O ₃ , aluminum carbide Al ₄ C ₃ , is carried out at a temperature not exceeding 1150-1450 ° C. The content of Al ₄ C ₃ in the composition of the integrated multiphase ingredient in an amount of 1-11 wt.% Does not adversely affect the technical properties of carbon-containing refractories.

The advantages of a multiphase ingredient synthesized at temperatures up to 1450 ° C include the reduction in the cost of obtaining fine powder from it, and high (more than 120 days) stability in 100% air humidity.

The multiphase ingredient provides the creation of a high-strength microporous refractory microstructure with a predominant pore size of less than 5 μm (more than 75%), increases the oxidation resistance of graphite and the carbon-containing components of the refractory, forms a protective layer, prevents the entry of a carbon-oxidizing gas medium into the refractory, significantly increases the heat resistance and strength carbon refractory.

In the study of the prior art, no similar technical solutions were identified that would be characterized by an identical set of essential features with the same result as obtained in the proposed technical solution, which allows us to conclude that it meets the criteria of "novelty" and "inventive step".

The inventive composition of the carbon-containing mass can be implemented in the manufacture of refractory products with improved technical properties and increased service life in the design of refractory linings of converters, electric furnaces, steel casting ladles, etc., using known components and technical means, which indicates that the proposed technical solution meets the criterion "Industrial applicability."

The properties of carbon-containing refractories from the claimed mass are provided subject to the composition in the declared amounts.

When the content in the carbon-containing mass is less than 4 wt.% Graphite, the carbon-containing refractory has reduced characteristics of heat resistance, slag and wear resistance, high temperature bending strength, and service life in lining. Carbon-containing masses with a graphite content higher than 20 wt.% Contain a large amount of entrained air and have a reduced bulk density, it is difficult to compress refractory products from such masses.

The introduction into the composition of the carbon-containing mass of an antioxidant additive of Al and a multiphase ingredient in amounts of less than 1.0 and 0.25 wt.%, Respectively, does not provide oxidation resistance of the carbon-containing refractory and improvement of strength characteristics. The increased content of antioxidant additives from Al and the multiphase ingredient in the carbon-containing mass, respectively, above 3 and 5 wt.% Leads to the formation of Al ₄ C ₃ in large quantities, which are dangerous for hydration and degradation of the properties of carbon-containing refractories.

The content of the solid carbon-containing component in the composition of the carbon-containing mass is less than 1.0 wt.% Leads to a sharp decrease in the apparent density and strength, an increase in the open porosity of the carbon-containing refractory after heat treatment. The increase in the amount of solid carbon-containing component above 4.7 wt.% Worsens the molding properties of carbon-containing masses, is the reason for the release of a large number of substances (phenols, aldehydes, etc.), harmful to human health and the environment.

A liquid carbon-containing component (plasticizer) is introduced to give the mass good formability. The decrease in the amount of liquid carbon-containing component less than 0.8 wt.% Leads to dusting of the mass and the difficulty of its formation. The content of the liquid carbon-containing component above 1.5 wt.% Increases the moisture content of the mass, complicates the molding of products and leads to the appearance of re-cracking cracks of raw carbon-containing refractory.

In the development of the carbon-containing mass, the following raw materials were used: coarse crystalline fused and clinker periclase with MgO content higher than 97 and 98 wt.%, Coarse-grained graphite with carbon content of 96 and 98 wt.%, Phenolic powder resin grade CT 2163 according to TU 2257-004-05761778 -2002, powdered aluminum grade ASD-1 according to TU 48-5-2266-87, boron oxide grade 12-3, TU 6-09-3558-78 and other solids. To obtain a liquid carbon-containing component (plasticizer), furfuryl alcohol in accordance with GOST 28960-91, ethyl cellosolve in accordance with GOST 8313-88, and technical urotropine in accordance with GOST 1381-73 were used.

The proposed solution allows to obtain refractory products with properties that exceed the prototype.

In examples 1 ÷ 23 shows the implementation of the invention.

Example 1. 76.25 wt.% Fused periclase granular filler of a polyfraction composition (MgO content 97.0 wt.%), 16.0 wt.% Graphite (C 96.2 wt.%), 0.25 wt.% Multiphase ingredient of composition No. 1 are introduced into the mixer (table .1), 2.5 wt.% Aluminum powder, 4.0 wt.% Solid carbon-containing component. Resins ST 2163, 1.0 wt.% liquid carbon component (plasticizer) with an intensity that does not allow the mixture to be heated above 55 ± 10 ° C until they form a mass with a bulk density of at least 1.6 ± 0.2 t / m ³ , the mass is unloaded from the mixer subjected to aging for 6 hours to evacuate gas emissions, after which the product is molded and subjected to heat treatment at a temperature of 270 ± 30 ° C.

The properties of the refractory of the claimed mass are shown in table 2.

Example 2. Into the mixer, 76.25 wt.% Fused periclase granular filler of a polyfraction composition (MgO content 97.0 wt.%), 16.0 wt.% Graphite (C 96.2 wt.%), 0.25 wt.% Multiphase ingredient of the composition are introduced No. 2 (Table 1), 2.5 wt.% Aluminum powder, 4.0 wt.% Solid carbon-containing component of resin CT 2163, 1.0 wt.% Liquid carbon component (plasticizer) with an intensity that does not allow the mixture to be heated above a temperature of 55 ± 10 ° С , until they form a mass with a bulk density of at least 1.6 ± 0.2 t / m ³ , the mass is unloaded from the mixer, subjected to irrigation for 6 hours to evacuate gas emissions, after which the products are molded and subjected to heat treatment at a temperature of not more than 270 ± 30 ° C.

The properties of the refractory of the claimed mass are shown in table 2.

Example 3. Into the mixer, 76.25 wt.% Fused periclase granular filler of a polyfraction composition (MgO content 97.0 wt.%), 16.0 wt.% Graphite (C 96.2 wt.%), 0.25 wt.% Multiphase ingredient of composition No. 3 are introduced (table .1), 2.5 wt.% Aluminum powder, 4.0 wt.% Solid carbon-containing component of resin CT 2163, 1.0 wt.% Liquid carbon component (plasticizer) with an intensity that prevents the mixture from heating above 55 ± 10 ° C until they form masses with a bulk density of not less than 1.6 ± 0.2 t / m ³ , the mass is unloaded from the mixer, subjected to irrigation for 6 hours to evacuate gas emissions, after which the products are molded and subjected to heat treatment at a temperature of not more than 270 ± 30 ° C.

The properties of the refractory of the claimed mass are shown in table 2.

Example 4. Into the mixer, 76.0 wt.% Fused periclase granular filler of a polyfraction composition (MgO content 97.0 wt.%), 16.0 wt.% Graphite (content C 96.2 wt.%), 0.5 wt.% Multiphase ingredient of composition No. 1 are introduced (table .1), 2.5 wt.% Aluminum powder, 4.0 wt.% Solid carbon-containing component of resin CT 2163, 1.0 wt.% Liquid carbon component (plasticizer) with an intensity that prevents the mixture from heating above 55 ± 10 ° C until they form masses with a bulk density of at least 1.4 ± 0.2 t / m ³ , the mass is unloaded from the mixer, subjected to lying for 6 hours to evacuate gas emissions, after which the products are molded and subjected to heat treatment at a temperature of not more than 270 ± 30 ° C.

The properties of the refractory of the claimed mass are shown in table 2.

Example 5. Into the mixer, 76.0 wt.% Fused periclase granular filler of a polyfraction composition (MgO content 97.0 wt.%), 16.0 wt.% Graphite (C 96.2 wt.%), 0.5 wt.% Multiphase ingredient of composition No. 2 are introduced (table .1), 2.5 wt.% Aluminum powder, 4.0 wt.% Solid carbon-containing component of resin CT 2163, 1.0 wt.% Liquid carbon component (plasticizer) with an intensity that prevents the mixture from heating above 55 ± 10 ° C until they form masses with a bulk density of at least 1.6 ± 0.2 t / m ³ , the mass is unloaded from the mixer, subjected to lying for 6 hours to evacuate gas emissions, after which the products are molded and subjected to heat treatment at a temperature of not more than 270 ± 30 ° C.

The properties of the refractory of the claimed mass are shown in table 2.

Example 6. 76.0 wt.% Fused periclase granular filler of a polyfraction composition (MgO content 97.0 wt.%), 16.0 wt.% Graphite (C 96.2 wt.%), 0.5 wt.% Multiphase ingredient of composition No. 3 are introduced into the mixer (table .1), 2.5 wt.% Aluminum powder, 4.0 wt.% Solid carbon-containing component of resin CT 2163, 1.0 wt.% Liquid carbon component (plasticizer) with an intensity that prevents the mixture from heating above 55 ± 10 ° C until they form masses with a bulk density of at least 1.6 ± 0.2 t / m ³ , the mass is unloaded from the mixer, subjected to lying for 6 hours to evacuate gas emissions, after which the products are molded and subjected to heat treatment at a temperature of not more than 270 ± 30 ° C.

The properties of the refractory of the claimed mass are shown in table 2.

Example 7. 75.75 wt.% Fused periclase granular filler of a polyfraction composition (MgO content 97.0 wt.%), 16.0 wt.% Graphite (C 96.2 wt.%), 0.75 wt.% Multiphase ingredient of composition No. 1 are introduced into the mixer (table .1), 2.5 wt.% Aluminum powder, 4.0 wt.% Solid carbon-containing component of resin CT 2163, 1.0 wt.% Liquid carbon component (plasticizer) with an intensity that prevents the mixture from heating above 55 ± 10 ° C until they form masses with a bulk density of not less than 1.6 ± 0.2 t / m ³ , the mass is unloaded from the mixer, subjected to irrigation for 6 hours to evacuate gas emissions, after which the products are molded and subjected to heat treatment at a temperature of not more than 270 ± 30 ° C.

The properties of the refractory of the claimed mass are shown in table 2.

Example 8. 75.75 wt.% Fused periclase granular filler of polyfraction composition (MgO content 97.0 wt.%), 16.0 wt.% Graphite (C content 96.2 wt.%) Is introduced into the mixer. 0.75 wt.% Multiphase ingredient of composition No. 2 (Table 1), 2.5 wt.% Aluminum powder, 4.0 wt.% Solid carbon-containing component of resin ST 2163, 1.0 wt.% Liquid carbon component (plasticizer) with an intensity that prevents the mixture from heating above a temperature of 55 ± 10 ° C, until they form a mass with a bulk density of not less than 1.6 ± 0.2 t / m ³ , the mass is unloaded from the mixer, subjected to aging for 6 hours to evacuate gas emissions, after which the products are molded and heat treated at temperature no more than 270 ± 30 ° С.

The properties of the refractory of the claimed mass are shown in table 2.

Example 9. 75.75 wt.% Fused periclase granular filler of a polyfraction composition (MgO content 97.0 wt.%), 16.0 wt.% Graphite (C 96.2 wt.%), 0.75 wt.% Multiphase ingredient of composition No. 3 are introduced into the mixer (Table 3) .1), 2.5 wt.% Aluminum powder, 4.0 wt.% Solid carbon-containing component of resin CT 2163, 1.0 wt.% Liquid carbon component (plasticizer) with an intensity that prevents the mixture from heating above 55 ± 10 ° C until they form masses with a bulk density of not less than 1.6 ± 0.2 t / m ³ , the mass is unloaded from the mixer, subjected to irrigation for 6 hours to evacuate gas emissions, after which the products are molded and subjected to heat treatment at a temperature of not more than 270 ± 30 ° C.

The properties of the refractory of the claimed mass are shown in table 2.

Example 10. 75.5 wt.% Fused periclase granular filler of a polyfraction composition (MgO content 97.0 wt.%), 16.0 wt.% Graphite (C 96.2 wt.%), 1.0 wt.% Multiphase ingredient of composition No. 1 are introduced into the mixer (table .1), 2.5 wt.% Aluminum powder, 4.0 wt.% Solid carbon-containing component of resin CT 2163, 1.0 wt.% Liquid carbon component (plasticizer) with an intensity that prevents the mixture from heating above 55 ± 10 ° C until they form mass having a bulk density of at least 1.6 ± 0.2 t / m ^{3, the} mass is discharged from the mixer is subjected to lezhivaniyu for 6 hours to evacuate gas discharge, after which the product is molded and subjected to heat treatment at a temperature of not more than 270 ± 30 ° C.

The properties of the refractory of the claimed mass are shown in table 2.

Example 11. 75.5 wt.% Fused periclase granular filler of a polyfraction composition (MgO content 97.0 wt.%), 16.0 wt.% Graphite (C content 96.2 wt.%), 1.0 wt.% Multiphase ingredient of composition No. 2 are introduced into the mixer (table .1), 2.5 wt.% Aluminum powder, 4.0 wt.% Solid carbon-containing component of resin CT 2163, 1.0 wt.% Liquid carbon component (plasticizer) with an intensity that prevents the mixture from heating above 55 ± 10 ° C until they form mass having a bulk density of at least 1.6 ± 0.2 t / m ^{3, the} mass is discharged from the mixer is subjected to lezhivaniyu for 6 hours to evacuate gas discharge, after which the product is molded and subjected to heat treatment at a temperature of not more than 270 ± 30 ° C.

The properties of the refractory of the claimed mass are shown in table 2.

Example 12. 75.5 wt.% Fused periclase granular filler of a polyfraction composition (MgO content 97.0 wt.%), 16.0 wt.% Graphite (C 96.2 wt.%), 1.0 wt.% Multiphase ingredient of composition No. 3 are introduced into the mixer (table .1), 2.5 wt.% Aluminum powder, 4.0 wt.% Solid carbon-containing component of resin CT 2163, 1.0 wt.% Liquid carbon component (plasticizer) with an intensity that prevents the mixture from heating above 55 ± 10 ° C until they form mass having a bulk density of at least 1.6 ± 0.2 t / m ^{3, the} mass is discharged from the mixer is subjected to lezhivaniyu for 6 hours to evacuate gas discharge, after which the product is molded and subjected to heat treatment at a temperature of not more than 270 ± 30 ° C.

The properties of the refractory of the claimed mass are shown in table 2.

Example 13. 74.0 wt.% Fused periclase granular filler of a polyfraction composition (MgO content 97.0 wt.%), 16.0 wt.% Graphite (C content 96.2 wt.%) Was added to the mixer. 2.5 wt.% Multiphase ingredient of composition No. 1 (Table 1), 2.5 wt.% Aluminum powder, 4.0 wt.% Solid carbon-containing component of resin ST 2163, 1.0 wt.% Liquid carbon component (plasticizer) with an intensity that does not allow heating of the mixture above a temperature of 55 ± 10 ° C, until they form a mass with a bulk density of not less than 1.6 ± 0.2 t / m ³ , the mass is unloaded from the mixer, subjected to aging for 6 hours to evacuate gas emissions, after which the products are molded and heat treated at temperature no more than 270 ± 30 ° С.

The properties of the refractory of the claimed mass are shown in table 2.

Example 14. Into the mixer, 74.0 wt.% Fused periclase granular filler of a polyfraction composition (MgO content 97.0 wt.%), 16.0 wt.% Graphite (content C 96.2 wt.%), 2.5 wt.% Multiphase ingredient of composition No. 2 are introduced (table .1), 2.5 wt.% Aluminum powder, 4.0 wt.% Solid carbon-containing component of resin CT 2163, 1.0 wt.% Liquid carbon component (plasticizer) with an intensity that prevents the mixture from heating above 55 ± 10 ° C until they form mass having a bulk density of at least 1.6 ± 0.2 t / m ^{3, the} mass is discharged from the mixer is subjected to lezhivaniyu for 6 hours to evacuate gas discharge, after which the product is molded and subjected to heat treatment at a temperature of not more than 270 ± 30 ° C.

The properties of the refractory of the claimed mass are shown in table 2.

Example 15. To the mixer, 74.0 wt.% Fused periclase granular filler of a polyfraction composition (MgO content 97.0 wt.%), 16.0 wt.% Graphite (content C 96.2 wt.%), 2.5 wt.% Multiphase ingredient of composition No. 3 are introduced (table .1), 2.5 wt.% Aluminum powder, 4.0 wt.% Solid carbon-containing component of resin CT 2163, 1.0 wt.% Liquid carbon component (plasticizer) with an intensity that prevents the mixture from heating above 55 ± 10 ° C until they form mass having a bulk density of at least 1.6 ± 0.2 t / m ^{3, the} mass is discharged from the mixer is subjected to lezhivaniyu for 6 hours to evacuate gas discharge, after which the product is molded and subjected to heat treatment at a temperature of not more than 270 ± 30 ° C.

The properties of the refractory of the claimed mass are shown in table 2.

Example 16. 71.5 wt.% Of fused periclase granular filler of a polyfraction composition (MgO content 97.0 wt.%), 16.0 wt.% Graphite (C 96.2 wt.%), 5.0 wt.% Multiphase ingredient of composition No. 1 are introduced into the mixer (table .1), 2.5 wt.% Aluminum powder, 4.0 wt.% Solid carbon-containing component of resin CT 2163, 1.0 wt.% Liquid carbon component (plasticizer) with an intensity that prevents the mixture from heating above 55 ± 10 ° C until they form mass having a bulk density of at least 1.6 ± 0.2 t / m ^{3, the} mass is discharged from the mixer is subjected to lezhivaniyu for 6 hours to evacuate gas discharge, after which the product is molded and subjected to heat treatment at a temperature of not more than 270 ± 30 ° C.

The properties of the refractory of the claimed mass are shown in table 2.

Example 17. 71.5 wt.% Fused periclase granular filler of a polyfraction composition (MgO content of 97.0 wt.%), 16.0 wt.% Graphite (C content of 96.2 wt.%), 5.0 wt.% Multiphase ingredient of composition No. 2 are introduced into the mixer (table .1), 2.5 wt.% Aluminum powder, 4.0 wt.% Solid carbon-containing component of resin CT 2163, 1.0 wt.% Liquid carbon component (plasticizer) with an intensity that prevents the mixture from heating above 55 ± 10 ° C until they form mass having a bulk density of at least 1.6 ± 0.2 t / m ^{3, the} mass is discharged from the mixer is subjected to lezhivaniyu for 6 hours to evacuate gas discharge, after which the product is molded and subjected to heat treatment at a temperature of not more than 270 ± 30 ° C.

The properties of the refractory of the claimed mass are shown in table 2.

Example 18. 71.5 wt.% Fused periclase granular filler of a polyfraction composition (MgO content 97.0 wt.%), 16.0 wt.% Graphite (C 96.2 wt.%), 5.0 wt.% Multiphase ingredient of composition No. 3 are introduced into the mixer (table .1), 2.5 wt.% Aluminum powder, 4.0 wt.% Solid carbon-containing component of resin CT 2163, 1.0 wt.% Liquid carbon component (plasticizer) with an intensity that prevents the mixture from heating above 55 ± 10 ° C until they form mass having a bulk density of at least 1.6 ± 0.2 t / m ^{3, the} mass is discharged from the mixer is subjected to lezhivaniyu for 6 hours to evacuate gas discharge, after which the product is molded and subjected to heat treatment at a temperature of not more than 270 ± 30 ° C.

The properties of the refractory of the claimed mass are shown in table 2.

Example 19. 71.5 wt.% Fused periclase granular filler of a polyfraction composition (MgO content 97.0 wt.%), 16.0 wt.% Graphite (C 96.2 wt.%), 5.0 wt.% Multiphase ingredient of composition No. 4 are introduced into the mixer (table .1), 2.5 wt.% Aluminum powder, 4.0 wt.% Solid carbon-containing component of resin CT 2163, 1.0 wt.% Liquid carbon component (plasticizer) with an intensity that prevents the mixture from heating above 55 ± 10 ° C until they form mass having a bulk density of at least 1.6 ± 0.2 t / m ^{3, the} mass is discharged from the mixer is subjected to lezhivaniyu for 6 hours to evacuate gas discharge, after which the product is molded and subjected to heat treatment at a temperature of not more than 270 ± 30 ° C.

The properties of the refractory of the claimed mass are shown in table 2.

Example 20. 71.5 wt.% Of fused periclase granular filler of a polyfraction composition (MgO content 97.0 wt.%), 16.0 wt.% Graphite (C 96.2 wt.%), 5.0 wt.% Multiphase ingredient of composition No. 5 are introduced into the mixer (table .1), 2.5 wt.% Aluminum powder, 4.0 wt.% Solid carbon-containing component of resin CT 2163, 1.0 wt.% Liquid carbon component (plasticizer) with an intensity that prevents the mixture from heating above 55 ± 10 ° C until they form mass having a bulk density of at least 1.6 ± 0.2 t / m ^{3, the} mass is discharged from the mixer is subjected to lezhivaniyu for 6 hours to evacuate gas discharge, after which the product is molded and subjected to heat treatment at a temperature of not more than 270 ± 30 ° C.

The properties of the refractory of the claimed mass are shown in table 2.

Example 21. To the mixer, 71.5 wt.% Fused periclase granular filler of a polyfraction composition (MgO content 97.0 wt.%), 16.0 wt.% Graphite (C 96.2 wt.%), 5.0 wt.% Multiphase ingredient of composition No. 6 are introduced (table .1), 2.5 wt.% Aluminum powder, 4.0 wt.% Solid carbon-containing component of resin CT 2163, 1.0 wt.% Liquid carbon component (plasticizer) with an intensity that prevents the mixture from heating above 55 ± 10 ° C until they form mass having a bulk density of at least 1.6 ± 0.2 t / m ^{3, the} mass is discharged from the mixer is subjected to lezhivaniyu for 6 hours to evacuate gas discharge, after which the product is molded and subjected to heat treatment at a temperature of not more than 270 ± 30 ° C.

The properties of the refractory of the claimed mass are shown in table 2.

Example 22. 73.2 wt.% Fused periclase granular filler of a polyfraction composition (MgO content 97 wt.%), 16 wt.% Graphite (C content 96.2 wt.%), 5 wt.% Multiphase ingredient of composition 6 are introduced into the mixer (table 1 ), 1.0 wt.% Aluminum powder, 4.0 wt.% Solid carbon component of resin CT 2163, 0.8 wt.% Liquid carbon component (plasticizer) with an intensity that does not allow the mixture to be heated above 55 ± 10 ° С until they form a mass bulk density not less than 1.6 ± 0.2 t / m ³ , the mass is unloaded from the mixer, subjected to aging for 6 hours to evacuate gas emissions, after which the products are molded and subjected to heat treatment at a temperature of 270 ± 30 ° С

The properties of the refractory of the claimed mass are shown in tables 2, 5.

Example 23. 70.8 wt.% Fused periclase granular filler of a polyfraction composition (MgO content of 97 wt.%), 16 wt.% Graphite (C content of 96.2 wt.%), 5 wt.% Multiphase ingredient of composition 6 are introduced into the mixer (table 1 ), 3.0 wt.% Aluminum powder, 4.0 wt.% Solid carbon component of the resin CT 2163, 1.2 wt.% Liquid carbon component (plasticizer) with an intensity that does not allow the mixture to be heated above 55 ± 10 ° С until they form a mass of bulk density not less than 1.6 ± 0.2 t / m ³ , the mass is unloaded from the mixer, subjected to aging for 6 hours to evacuate gas emissions, after which the products are molded and subjected to heat treatment at a temperature of 270 ± 30 ° C.

The properties of the refractory of the claimed mass are shown in tables 2, 5.

Example 24. 71.0 wt.% Of fused periclase granular filler of a polyfraction composition (MgO content of 97 wt.%), 16 wt.% Graphite (C content of 96.2 wt.%), 5 wt.% Multiphase ingredient of composition 6 are introduced into the mixer (table 1 ), 2.5 wt.% Aluminum powder, 4.0 wt.% Solid carbon component of resin CT 2163, 1.5 wt.% Liquid carbon component (plasticizer) with an intensity that does not allow the mixture to be heated above a temperature of 55 ± 10 ° C until they form a mass of bulk density not less than 1.6 ± 0.2 t / m ³ , the mass is unloaded from the mixer, subjected to aging for 6 hours to evacuate gas emissions, after which the products are molded and subjected to heat treatment at a temperature of 270 ± 30 ° C.

The properties of the refractory of the claimed mass are shown in tables 2, 5.

Table 1 The composition of the multiphase ingredient Composition number The composition of the multiphase ingredient. wt.% Synthesis temperature, ° С Holding time, hour Resistance to hydration at γ _air = 100%, days Al ₂ OC Al ₈ B ₄ C ₇ Al ₄ About ₄ C Al ₂ About ₃ Al ₄ C ₃ one 37 28 twenty four eleven 1150 four > 120 2 43 26 fifteen 9 7 1300   > 120 3 45 24 eighteen 12 one 1450   > 150 four 45 twenty 22 eleven 2 1150 8 > 150 5 43 22 22 12 one 1300   > 150 6 44 26 17 12 one 1450   > 150 7 * - 84 - - 16 1550 - > 150 hours * - according to JP7018255, С04В 35/10

table 2 Properties of carbon-containing refractories of the claimed mass Example No. Bending strength, MPa (1300 ° С), average values Heat resistance, the number of heat exchangers in the regime of 1300 ° С - water Decarburization depth, mm at 1600 ° С * one 9.1 fourteen 3,7 2 9,4 fifteen 3,5 3 9.5 17 3.6 four 9.8 fifteen 3,7 5 10.5 fifteen 3,5 6 11.0 17 3,5 7 12.1 fifteen 3.2 8 12.3 16 3.0 9 13.3 17 2.9 10 14.8 fifteen 2.5 eleven 14.6 17 2.7 12 15,5 17 2.5 13 18.5 22 2.5 fourteen 19.0 22 2,3 fifteen 19.2 25 2,3 16 21.9 31 2.1 17 21.8 33 2.0 eighteen 22.0 37 1.7 19 22.2 35 1,6 twenty 22.6 38 1,5 21 23.0 40 1,5 22 12.8 16 3,1 23 24.4 34 2.0 24 20.6 eighteen 2,8 * The degree of oxidizability was evaluated by the depth of the decarburized layer of samples sawn in the center perpendicular to the axis of pressing, after they were held in a gas-flame furnace for 2 hours at 1600 ° C.

Table 3 The degree of oxidation of refractories from the claimed mass at 1600 ° C in comparison with the prototype Example Number The composition of the refractory, wt.% Decarburization depth, mm at 1600 ° С MgO FROM The composition of the integrated multiphase ingredient, wt.% (Number) Al Al ₂ About ₃ Al ₂ OS Al ₈ B ₄ C ₇ Al ₄ About ₄ C Al ₂ About ₃ Al ₄ C ₃ one 74.5 18.0 5.0 (No.1) 2.5 - 2.1 1.85 1.4 1,0 0.2 0.55 2 74.5 18.0 5.0 (No.2) 2.5 - 2.0 2.15 1.3 0.75 0.45 0.35 3 74.5 18.0 5.0 (No.3) 2.5 - 1.7 2.25 1,2 0.9 0.6 0.05 four 74.5 18.0 5.0 (No.4) 2.5 - 1,6 2.25 1,0 1,1 0.55 0.1 5 74.5 18.0 5.0 (No.5) 2.5 - 1,5 2.15 1,1 1,1 0.6 0.05 6 74.5 18.0 5.0 (No.6) 2.5 - 1,5 2.2 1.3 0.85 0.6 0.05 7 * 72.5 17.5 - 4.2 - - 0.8 - 5,0 2.2 8** 79.0 14.9 - - - - - 5.8 0.3 2,4 7 * - JP 7018255, С04В 35/10 8 ** - prototype RU 2171243, class СВВ 35/035, publ. 07/27/2001

As can be seen from tables 1-5, the inventive carbon-containing mass provides refractories with higher physical, technical and operational properties.

Table 4 Properties of carbon-containing refractories Test object Strength after thermal shock cycle 800 ° С - air, MPa The oxidation resistance,% Bending strength at 1400 ° С, MPa Resistance to hydration by exposure, days According to No. 2007107 049/03 (007660)

Not destroyed Prototype RU 2171243, class С04В 35/035

Destroyed after 14 * Strength after a thermal shock cycle of 20 ° С - 800 ° С (1 hour exposure) - 20 ° С was determined on products 220 × 80 × 190 mm. Products were passed through a tunnel kiln. In the zone of maximum temperatures of 1530 ° C, an exposure of 4.5 hours was made. ** Oxidation resistance was determined on products 220 × 80 × 190 mm. Products were passed through a tunnel kiln. In the zone of maximum temperatures of 1600 ° C, an exposure of 2 hours was made. In all cases, the total stay of products in the tunnel kiln is 36 hours.

Table 5 - The effect of the composition and quantity of liquid carbon-containing component on the properties of carbon-containing refractories Example No. Liquid content
carbon component
in mass, wt.% Liquid composition
carbon
component in
mass, wt.% Content
solid
carbon
component in
mass, wt.% The properties Tensile strength
when bending at
1300 ° C, MPa,
average value Heat resistance
heat transfer
1300 ° C - water Depth
decarburization
at 1600 ° C, mm furfuryl alcohol 0.53 22 0.8 ethyl cellosolve 0.22 4.0 12.8 16 3,1 urotropin 0.05 furfuryl alcohol 0.67 21 1,0 ethyl cellosolve 0.26 4.0 23.0 40 1,5 urotropin 0,07 furfuryl alcohol 0.36 23 1,2 ethyl cellosolve 0.66 4.0 24.4 34 2.0 urotropin 0.18 furfuryl alcohol 1,0 24 1,5 ethyl cellosolve 0.42 4.0 20.6 eighteen 2,8 urotropin 0.08

Claims (2)

1. Carbon-containing mass, including refractory granular filler, graphite, carbon-containing components with a high coke residue: phenolic powder resin as a solid, ethyl cellosolve, furfuryl alcohol and urotropin as a liquid, antioxidant additives from aluminum and boron-containing compound, characterized in that antioxidant additives contains aluminum Al and a multiphase ingredient, including boraluminium carbide, aluminum oxycarbides, aluminum carbide and corundum at a phase ratio, ma .%:
Al ₂ OS 37.0-45.0 Al ₈ B ₄ C ₇ 20.0-28.0 Al ₄ About ₄ C 15.0-22.0 Al ₂ About ₃ 4.0-12.0 Al ₄ C ₃ 1.0-11.0
in the following ratio of components, wt.%:
multiphase ingredient 0.25-5.0 graphite 4.0-20.0 antioxidant additive from Al 1.0-3.0 solid carbon component 1.0-4.7 liquid carbon component 0.8-1.5 refractory granular filler the rest is up to 100 2. The carbon-containing mass according to claim 1, characterized in that the multiphase ingredient is a finely divided powder with a particle size of not more than 60 μm fired at a temperature of 1150-1450 ° C of a mixture of boron oxide, graphite and aluminum in a ratio of B ₂ O ₃ : C: Al equal to 1: (2.0-3.5) :( 5.0-6.0).