CN106966708B - Unburned alumina-magnesia carbon brick and preparation method thereof - Google Patents

Unburned alumina-magnesia carbon brick and preparation method thereof Download PDF

Info

Publication number
CN106966708B
CN106966708B CN201710284549.1A CN201710284549A CN106966708B CN 106966708 B CN106966708 B CN 106966708B CN 201710284549 A CN201710284549 A CN 201710284549A CN 106966708 B CN106966708 B CN 106966708B
Authority
CN
China
Prior art keywords
parts
equal
percent
granularity
magnesia
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201710284549.1A
Other languages
Chinese (zh)
Other versions
CN106966708A (en
Inventor
孙光
郭全营
洪学勤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DASHIQIAO GUANCHENG REFRACTORY Co.,Ltd.
Original Assignee
Dashiqiao Guancheng Refractory Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dashiqiao Guancheng Refractory Co ltd filed Critical Dashiqiao Guancheng Refractory Co ltd
Priority to CN201710284549.1A priority Critical patent/CN106966708B/en
Publication of CN106966708A publication Critical patent/CN106966708A/en
Application granted granted Critical
Publication of CN106966708B publication Critical patent/CN106966708B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C04B35/101—Refractories from grain sized mixtures
    • C04B35/103—Refractories from grain sized mixtures containing non-oxide refractory materials, e.g. carbon
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
    • C04B2235/3222—Aluminates other than alumino-silicates, e.g. spinel (MgAl2O4)
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • C04B2235/3227—Lanthanum oxide or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • C04B2235/3229—Cerium oxides or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38—Non-oxide ceramic constituents or additives
    • C04B2235/3817—Carbides
    • C04B2235/3826—Silicon carbides
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/40—Metallic constituents or additives not added as binding phase
    • C04B2235/402—Aluminium
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
    • C04B2235/422—Carbon
    • C04B2235/425—Graphite
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
    • C04B2235/428—Silicon
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/48—Organic compounds becoming part of a ceramic after heat treatment, e.g. carbonising phenol resins
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54—Particle size related information
    • C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54—Particle size related information
    • C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
    • C04B2235/5427—Particle size related information expressed by the size of the particles or aggregates thereof millimeter or submillimeter sized, i.e. larger than 0,1 mm
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74—Physical characteristics
    • C04B2235/77—Density
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance

Abstract

The invention belongs to the technical field of high-grade refractory materials for electric furnaces, converter linings and ladle linings and preparation thereof, and relates to an unburned alumina-magnesia carbon brick and a preparation method thereof. An unburned alumina-magnesia carbon brick comprises aggregate, powder, an additive and a bonding agent, and is composed of the following components in parts by weight: the composite material is prepared from brown corundum (or special-grade bauxite 60-70 parts, magnesia-alumina spinel 1-3 parts, high-purity magnesia 9-11 parts, sub-white corundum 11-13 parts, additive 2-4 parts, graphite 5-7 parts, high-temperature asphalt 1-3 parts, rare earth oxide 0.2-0.5 part, ceramic binder 3-5 parts, complexing magnesium-aluminum cementing agent 3-4 parts, and water 1-3 parts.

Description

Unburned alumina-magnesia carbon brick and preparation method thereof
Technical Field
The invention belongs to the technical field of high-grade refractory materials for electric furnaces, converter linings and ladle linings and preparation thereof, and particularly relates to an unburned alumina-magnesia carbon brick and a preparation method thereof.
Background
The alumina-magnesia-carbon brick is made of Al2O3The carbon-containing refractory material with MgO and C as main components contains Al2O 360-69 wt%, MgO 7-14 wt% and C5-12 wt%. Has better slag corrosion resistance and thermal shock resistance, has micro-scale re-burning expansion, and is mainly used for lining of electric furnaces and converters and ladle linings. The existing alumina-magnesia carbon brick can meet certain use requirements, but still has the problems of high price, short service life and the like. Therefore, how to reduce the cost and develop a high-efficiency, long-service-life, green and environment-friendly refractory material is always a technical and economic problem which is highly valued by the refractory industry.
At present, in order to reduce haze and protect the environment, in the preparation method of the alumina-magnesia carbon brick, natural gas is selected to replace fuel oil to provide heat energy in the brick firing process, so that a large amount of natural gas is required to provide heat energy in the firing process, the cost of the natural gas required by firing each ton of bricks is about 600 yuan plus 800 yuan, the product cost is still high, a certain amount of greenhouse gas is still generated by the combustion of natural gas in the firing process, and the overall greenhouse effect of the earth can be influenced. Although natural gas is colorless and tasteless, when the natural gas is gathered in a certain proportion in a closed environment, powerful explosion can be triggered, so that the natural gas is used for providing heat energy, certain potential safety hazards exist, details in the preparation link are relatively rough to master, and the appearance and the density of the prepared formed green bricks are insufficient.
Therefore, the development of the unburned alumina-magnesia carbon brick which has the advantages of simple and safe preparation method, low cost, no need of high-temperature sintering, high density, high strength, strong corrosion resistance, strong molten metal resistance and oxidation resistance, energy conservation and emission reduction is very necessary.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide an unburned alumina-magnesia carbon brick and a preparation method thereof. The unburned alumina-magnesia carbon brick has the advantages of high density, high strength, good high-temperature thermal shock stability, strong oxidation resistance and the like; the preparation method is simple, low in cost, energy-saving and safe in preparation, and high-temperature sintering is not needed.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows.
The unburned alumina-magnesia carbon brick is characterized in that: the aggregate comprises aggregate, powder, an additive and a bonding agent, wherein the aggregate comprises the following raw materials in parts by weight: brown corundum (Al)2O3Not less than 94.5 percent, the particle size is 0.1-1mm) and/or special alumina (Al)2O3More than or equal to 88 percent and the granularity is 1-5mm)60-70 parts; the powder comprises the following raw materials in parts by weight: magnesium aluminate spinel (MgO is more than or equal to 33 percent, Al)2O3More than or equal to 65 percent, the granularity of 300 plus 400 meshes) 1-3 parts, high-purity magnesia (the MgO is more than or equal to 97 percent, the granularity of 300 plus 400 meshes, the particle volume density of more than or equal to 3.28g.cm-3 and the water content of less than or equal to 4 percent) 9-11 parts, sub-white corundum (the Al2O3 is more than or equal to 97 percent and the granularity of 300 plus 400 meshes) 11-13 parts; 2-4 parts of an additive; 5-7 parts of graphite (C is more than or equal to 97 percent and the water content is less than or equal to 0.5 percent), 1-3 parts of high-temperature asphalt (softening is more than or equal to 150 ℃, the residual carbon is more than or equal to 50 percent and the granularity is 200 meshes), 0.2-0.5 part of rare earth oxide (the granularity is 300 meshes and 350 meshes), 3-5 parts of ceramic bonding agent, 3-4 parts of complexing magnesium aluminum cementing agent and 1-3 parts of water.
The invention relates to a preferable scheme, which comprises aggregate, powder, an additive and a bonding agent, wherein the aggregate comprises the following raw materials in parts by weight: special grade alumina (Al)2O3Not less than 88 percent, granularity of 1-5mm)53 parts, brown corundum (Al)2O33Not less than 94.5 percent and granularity of 0.1-1mm)12 parts; the powder comprises the following raw materials in parts by weight: magnesium aluminate spinel (MgO is more than or equal to 33 percent, Al)2O3More than or equal to 65 percent, granularity of 300 plus 400 meshes) 2 parts, high-purity magnesia (MgO more than or equal to 97 percent, granularity of 300 plus 400 meshes, particle volume density more than or equal to 3.28g.cm-3 and water content less than or equal to 4 percent) 10 parts, sub-white corundum (Al2O3More than or equal to 97 percent and the granularity is 300-400 meshes) 12 parts; 3 parts of an additive; 6 portions of graphite (C is more than or equal to 97 percent and the water content is less than or equal to 0.5 percent), 2 portions of high-temperature asphalt (softening is more than or equal to 150 ℃, residual carbon is more than or equal to 50 percent and the granularity is 200 meshes), and 350 portions of rare earth oxide (the granularity is 300 meshes))0.4 part of ceramic bonding agent, 4 parts of complexing magnesium aluminum cementing agent and 1-3 parts of water.
Further, the additive is silicon carbide
The other preferable scheme of the invention comprises aggregate, powder, additive and binding agent, wherein the aggregate comprises the following raw materials in parts by weight: brown corundum (Al)2O33More than or equal to 94.5 percent and the granularity of 0.1-1mm)65 parts; the powder comprises the following raw materials in parts by weight: magnesium aluminate spinel (MgO is more than or equal to 33 percent, Al)2O3More than or equal to 65 percent, the granularity of 300 plus 400 meshes), 10 parts of high-purity magnesia (the MgO is more than or equal to 97 percent, the granularity of 300 plus 400 meshes, the particle volume density of more than or equal to 3.28g.cm-3 and the water content of less than or equal to 4 percent), and 12 parts of sub-white corundum (the Al2O3 is more than or equal to 97 percent and the granularity of 300 plus 400 meshes); 3 parts of an additive; 6 parts of graphite (C is more than or equal to 97 percent and the water content is less than or equal to 0.5 percent), 2 parts of high-temperature asphalt (softening is more than or equal to 150 ℃, the residual carbon is more than or equal to 50 percent and the granularity is 200 meshes), 0.4 part of rare earth oxide (the granularity is 300 meshes and 350 meshes), 4 parts of ceramic bonding agent, 3.5 parts of complexing magnesium aluminum cementing agent and 1-3 parts of water.
Further, the additive is metal aluminum powder and metal silicon powder, and the weight part ratio of the metal aluminum powder to the metal silicon powder is 1: 1.
According to a third preferred scheme of the invention, the high-purity magnesite comprises high-purity fused magnesite (MgO is more than or equal to 97%, the granularity is 300-400 meshes, the volume density of the particles is more than or equal to 3.45g.cm-3, and the water content is less than or equal to 4%) and high-purity sintered magnesite (MgO is more than or equal to 97%, the granularity is 300-400 meshes, the volume density of the particles is more than or equal to 3.28g.cm-3, and the water content is less than or equal to 4%), and the weight part ratio of the high-purity fused magnesite to the high-purity sintered magnesite is 1: 1.
In the fourth preferred scheme of the invention, the additive is one or two of silicon carbide (SiC is more than or equal to 97 percent and the granularity is 200 meshes), metal aluminum powder (Al is more than or equal to 98 percent and the granularity is 200 meshes) and metal silicon powder (Si is more than or equal to 98 percent and the granularity is 200 meshes).
In a fifth preferred embodiment of the present invention, the rare earth oxide is one or two of cerium oxide, praseodymium oxide, lanthanum oxide and rubidium oxide.
In a sixth preferred embodiment of the present invention, the weight ratio of the special alumina (particle size 1-3mm) to the special alumina (particle size 3-5mm) is 8-9: 4-5.
A preparation method of unburned alumina-magnesia carbon bricks comprises the following steps:
(1) processing of raw materials
Aggregate: weighing brown corundum and/or special-grade alumina according to parts by weight, putting the brown corundum and/or special-grade alumina into a jaw crusher for crushing, crushing the brown corundum and/or special-grade alumina into large particles by using double rollers, screening aggregate with the particle size of 0.1-5mm by using a vibrating screen, and clearing away the accumulated materials of a storage bin and a crushing equipment system when crushing, crushing and replacing materials;
powder lot: weighing high-purity fused magnesia, high-purity sintered magnesia, magnesia-alumina spinel and sub-white corundum according to parts by weight, putting the high-purity fused magnesia, the high-purity sintered magnesia, the magnesia-alumina spinel and the sub-white corundum into a jaw crusher for crushing, crushing the fused magnesia into large particles, crushing the large particles by using double rollers, performing vibration screening to obtain particles with the particle size of 1-5mm, putting the particles into a Raymond mill to obtain 150-mesh fine powder, adding the fine powder into a ball mill for ball milling, wherein the ball milling rotation speed is 200 plus materials for 250r/min, and the ball milling time is 20-30min to; weighing an additive, high-temperature asphalt, a rare earth oxide and a ceramic binder according to parts by weight, and adding the additive, the high-temperature asphalt, the rare earth oxide and the ceramic binder into the powder to support the premixed powder;
(2) mixing material
Putting the prepared aggregate into a pug mixing mill, wherein the mixing rotating speed is 20-30r/min, and the mixing time is 2-3 min; adding 2/3 parts by weight of complex magnesium aluminum cementing agent, adding water during stirring until the binding agent forms slurry to wrap the surface of the aggregate, and mixing at the speed of 20-30r/min for 4-5 min; adding graphite, mixing at 20-30r/min for 4-5 min; adding the premixed powder, mixing at the rotating speed of 20-30r/min, and stirring for 7-8 min; adding 1/3 parts by weight of complex magnesium aluminum cementing agent, mixing at 20-30r/min for 7-8min, wherein the material temperature is not lower than 20 ℃ in winter and not higher than 45 ℃ in summer;
(3) molding: weighing a certain amount of mixed materials, putting the mixed materials into a press for forming, wherein the pressure of the press is 700-1000 tons, the mixed materials in a mold are required to be scraped back and forth, four corners are filled, the mixed materials are light and heavy, the first hammer and the second hammer are used for hanging hammer operation and mold stripping and air exhausting, the number of times of mold stripping and air exhausting is 3-5, then the hammers are lifted by 3-5 hammers for heavy impact, the density of a formed body is more than or equal to 3.32/g.cm3；
(4) And (3) drying: putting the formed composite green brick into an electric heating drying device for drying, wherein the temperature is raised to 20-55 ℃, and the heating time is 3 hours; keeping the temperature at 55 +/-10 ℃ and heating for 3 h; the temperature is raised to 55-100 ℃, and the heating time is 3 h; keeping the temperature at 100 +/-15 ℃ and heating for 4 h; heating for 6 hours at the temperature of 100-210 ℃; keeping the temperature at 210 +/-10 ℃ and heating for 5 h; and obtaining a finished product.
The invention has the beneficial effects that:
(1) the performance is superior.
The unburned magnesia-alumina-carbon brick adopts the complex magnesia-alumina cementing agent and the ceramic bonding agent, and the comparison of the tables 3 and 4 shows that the performance of the unburned magnesia-alumina-carbon brick is far higher than the performance index of the existing alumina-magnesia-carbon brick, and the unburned magnesia-alumina-carbon brick has the advantages of high purity, high density, high strength, small porosity, low shrinkage, strong slag corrosion resistance, strong oxidation resistance and the like. The complex magnesium-aluminum cementing agent adopted by the invention mainly comprises MgO and Al2O3The powder is prepared by nano technology, when used as the bonding agent of the invention, impurity components are not introduced, the bonding effect is achieved after hydration at normal temperature, and after drying, a penetrating structure is formed and embedded between particles and fine powder, so that the invention has ideal bonding strength.
(2) The cost is reduced.
Compared with high-temperature sintering, the cost in the preparation process of the invention is reduced by 500 plus 550 yuan/ton (the firing cost of natural gas bricks is about 600 yuan/ton, and the baking-free baking cost is 50-100 yuan/ton.) which saves huge economic cost for society, creates huge economic benefit and has huge influence.
(3) Energy saving and no potential safety hazard.
The invention does not adopt natural gas to provide heat energy for high-temperature sintering in the preparation process, adopts the electric energy low-temperature baking technology, and overcomes the defects of high price of the natural gas and CO generated after the natural gas is combusted2Greenhouse effect, etc. The complexing magnesium-aluminum cementing agent adopts advanced technology, is nontoxic and tasteless, and is energy-saving and environment-friendly; compared with the traditional magnesia-chrome brick, the invention does not add chromium-containing raw materials into the ingredients, does not pollute the environment, and has no working strip for workersThe parts are greatly improved; and no potential safety hazard problem caused by natural gas exists.
(4) The preparation method improves the forming effect of the brick.
The invention can ensure the compactness of the green brick, prevent the generation of the spalling, ensure the uniform structure of the demoulded green brick, avoid the phenomenon that coarse particles are concentrated at corner parts and have no obvious pockmark, white point, spalling and flash on the surface. The protection is very careful in the process of storage and transportation, and the forming completion degree is improved.
Drawings
FIG. 1 is a scanning electron micrograph of an unfired alumina-magnesia carbon brick prepared according to example 1 of the present invention (300X, 20 μm).
FIG. 2 is an XRD pattern of a polished unburned alumina-magnesia carbon brick prepared in example 1 of the present invention.
Detailed Description
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate features and advantages of the invention, and not to limit the scope of the claims.
Example 1.
The raw materials were weighed out according to the components specified in table 1 below, respectively, and the preparation method was as follows.
(1) Processing of raw materials
Aggregate: weighing brown corundum and/or special-grade alumina according to parts by weight, putting the brown corundum and/or special-grade alumina into a jaw crusher for crushing, crushing the mixture into large particles by using double rollers, screening aggregate with the particle size of 0.1-5mm by using a vibrating screen, and clearing accumulated materials in a storage bin and a crushing equipment system when crushing, crushing and changing materials.
Powder lot: weighing high-purity fused magnesia, high-purity sintered magnesia, magnesia-alumina spinel and sub-white corundum according to parts by weight, putting the high-purity fused magnesia, the high-purity sintered magnesia, the magnesia-alumina spinel and the sub-white corundum into a jaw crusher for crushing, crushing the fused magnesia into large particles, crushing the large particles by using double rollers, performing vibration screening to obtain particles with the particle size of 1-5mm, putting the particles into a Raymond mill to obtain 150-mesh fine powder, adding the fine powder into a ball mill for ball milling, wherein the ball milling rotation speed is 200 plus materials for 250r/min, and the ball milling time is 20-30min to; weighing the additive, the high-temperature asphalt, the rare earth oxide and the ceramic binder according to the parts by weight, and adding the additive, the high-temperature asphalt, the rare earth oxide and the ceramic binder into the powder to support the premixed powder.
(2) Mixing material
Putting the prepared aggregate into a pug mixing mill, wherein the mixing rotating speed is 20-30r/min, and the mixing time is 2-3 min; adding 2/3 parts by weight of complex magnesium aluminum cementing agent, adding water during stirring until the binding agent forms slurry to wrap the surface of the aggregate, and mixing at the speed of 20-30r/min for 4-5 min; adding graphite, mixing at 20-30r/min for 4-5 min; adding the premixed powder, mixing at the rotating speed of 20-30r/min, and stirring for 7-8 min; 1/3 parts by weight of complex magnesium aluminum cementing agent is added, the mixing speed is 20-30r/min, the stirring time is 7-8min, the material temperature in winter is not lower than 20 ℃, and the material temperature in summer is not higher than 45 ℃.
Note that: the pug after mixing is fully lubricated and does not contain dry fine powder, pug balls, pug cakes and the like. The dosage of the binding agent can be increased or decreased according to the dry or wet condition of the pug. The empirical rule for judging the dryness and the humidity of the mud materials is as follows: "kneading into a ball with hand, and pressing once to disperse"; when mixing materials, the liquid binding agent is added slowly and uniformly without being too fast or too fast so as to avoid uneven or conglomeration of pug; waste materials generated in the material mixing process can be mixed according to the same material, and cannot be used in a centralized way, and the reclaimed materials and the fine powder are added together, wherein the adding amount is not more than 15% of the total mixing amount; putting the mixed pug into a flexible container, ageing the pug for 1-2 hours and then forming.
(3) Molding: weighing a certain amount of mixed materials, putting the mixed materials into a press for forming, wherein the pressure of the press is 700-1000 tons, the mixed materials in a mold are required to be scraped back and forth, four corners are filled, the mixed materials are light and heavy, the first hammer and the second hammer are used for hanging hammer operation and mold stripping and air exhausting, the number of times of mold stripping and air exhausting is 3-5, then the hammers are lifted by 3-5 hammers for heavy impact, the density of a formed body is more than or equal to 3.32/g.cm3；
Note that: the taper of the brick mold is 0.6%, and the clearance between the mold wall lining plate and the bottom plate is not more than 0.5 mm. The footage rate was 0. When a mould is newly installed and a machine is started up for a shift, the first brick and the second brick are pressed and must be carefully checked to ensure that the brick shape size conforms to the drawing, the demoulded green brick needs to be lightly taken and placed, in order to ensure the green brick density and prevent the generation of layer cracks, the molding pug needs to be accurately weighed, and the particles are uniform. The demoulded green brick has uniform structure, and does not allow the phenomenon that coarse particles are concentrated at corner parts, and obvious pockmarks, white spots, layer cracks and flashes on the surface. The shape of the green brick is in accordance with the table 2, and the distance between green bricks is kept between 5 and 10 mm.
(4) And (3) drying: putting the formed composite green brick into an electric heating drying device for drying, wherein the temperature is raised to 20-55 ℃, and the heating time is 3 hours; keeping the temperature at 55 +/-10 ℃ and heating for 3 h; the temperature is raised to 55-100 ℃, and the heating time is 3 h; keeping the temperature at 100 +/-15 ℃ and heating for 4 h; heating for 6 hours at the temperature of 100-210 ℃; keeping the temperature at 210 +/-10 ℃ and heating for 5 hours, wherein the total time is 24 hours; and obtaining a finished product.
Note that: the green bricks without heat treatment can be stored for no more than 5 days.
(5) Inspecting and packaging the quality of finished products: the quality testing personnel perform appearance inspection on the finished products which are put in storage according to the standard requirements, the finished products are packaged and put in storage after being inspected to be qualified, meanwhile, the finished products are sampled and sent for inspection according to the marks and are subjected to physical and chemical property detection, and the waste products are classified according to the material quality and are treated in a centralized way; the moisture-proof packaging of the inner layer plastic film and the outer layer paper box is adopted, and the weight of each box is not more than 2.0 tons.
(6) Storage and transportation: the products are placed in a warehouse according to user, brand and variety classification codes, and are prevented from being affected with damp. When the data is sent to the user, the data should be sent in advance. The finished product should be accompanied with a quality certificate when leaving the factory, which indicates the brand, specification and inspection result of the product. After the goods are delivered to the user, the goods are stored in a warehouse to prevent from being affected with damp.
The physical and mechanical property indexes of the prepared finished product in the embodiment 1 of the invention are tested. The test results are listed in table 3.
The prepared finished product of the embodiment 1 of the invention is subjected to electron microscope scanning, and the result is shown in figure 1; the X-ray diffraction detection is carried out on the product, and the result is shown in the attached figure 2.
Example 2.
The procedure of example 1 was repeated with the respective component contents specified in table 1 below, and the test results are listed in table 3.
Example 3.
The procedure of example 1 was repeated with the respective component contents specified in table 1 below, and the test results are listed in table 3.
Comparative example 1.
The process of example 1 was repeated with the component contents specified in table 1 below, with the only difference that the drying ramp temperature was increased to 1400 ℃ in preparation process step 4, the heating time being 5h, and the test results are listed in table 3.
Comparative example 2.
The process of example 2 was repeated with the respective component contents specified in table 1 below, with the only difference that the drying ramp temperature was increased to 1400 ℃ in preparation process step 4, the heating time being 5h, and the test results are listed in table 3.
Comparative example 3.
The procedure of example 3 was repeated with the respective component contents specified in table 1 below, with the only difference that the drying ramp temperature was increased to 1400 ℃ in preparation process step 4, the heating time being 5h, and the test results are listed in table 3.
Table 1 raw material proportioning table of examples 1-3 of the present invention.
Figure BDA0001279007250000051
Figure BDA0001279007250000061
Figure BDA0001279007250000071
Table 2 a specified data table to which the green brick shape should be conformed.
Figure BDA0001279007250000072
Firstly, detecting the performance.
1. The unburned alumina-magnesia carbon bricks prepared in examples 1 to 3 and comparative examples 1 to 3 were subjected to the performance test, and the results are shown in Table 3.
TABLE 3 physicochemical indices of examples 1 to 3 of the present invention and comparative examples 1 to 3.
Figure BDA0001279007250000073
2. The performance indexes of the magnesia carbon bricks with different types on the market are shown in table 4.
Table 4 performance indexes of various types of magnesia carbon bricks on the market at present.
Figure BDA0001279007250000081
As can be seen from tables 3 and 4, the volume density of the unburned alumina-magnesia carbon brick prepared by the present invention is more than 3.20g.cm-3The porosity is less than 14%, the volume density in the performance indexes of the magnesia carbon bricks with different types on the market at present is more than or equal to 2.65g.cm-3, and the porosity is less than or equal to 21%, so that the volume density of the magnesia carbon brick is greater than the volume density in the performance indexes of the magnesia carbon bricks with different types on the market at present, and the porosity is less than the porosity in the performance indexes of the magnesia carbon bricks with different types, which shows that the magnesia carbon brick has strong corrosion resistance, molten metal resistance and strong oxidation resistance; the compression strength of the magnesia carbon brick is more than 70Mpa at 200 ℃ for 24h, the high-temperature breaking strength (1450 ℃ for 1h) is more than or equal to 9Mpa, and the normal-temperature compression strength in the performance indexes of the magnesia carbon bricks of different types on the market is more than 40Mpa at present, so that the compression strength of the magnesia carbon brick is greater than that in the performance indexes of the magnesia carbon bricks of different types on the market at present; the refractoriness under load of 0.2Mpa of the invention is not less than 1680 ℃, the refractoriness under load of 0.2Mpa in the performance indexes of the magnesia carbon bricks with different types on the market at present is not less than 1420 ℃, and the refractoriness under load of 0.2Mpa of the invention is higher than the refractoriness under load of 0.2Mpa in the performance indexes of the magnesia carbon bricks with different types on the market at present, therefore, the invention has the advantages of high temperature stress resistance, high normal temperature compressive strength and high temperature bending strength.
As can be seen from Table 3, the unburned alumina-magnesia carbon brick prepared by baking at 200 ℃ for 24h for dehydration has the normal-temperature compressive strength of more than 70MPa, which is caused by hydration bonding, so that the unburned alumina-magnesia carbon brick has higher normal-temperature compressive strength; the sintering at 1400 ℃ of the invention is the transitional sintering of the nano ceramics, so that the high-temperature bending strength of the unburned alumina-magnesia carbon brick is more than 9 Mpa; the invention has the characteristic of sintering while applying in the using process.
3. The finished product prepared in example 1 of the present invention was subjected to electron microscope scanning, and the results are shown in fig. 1.
FIG. 1 is an electron microscope scanning image of a finished product prepared in example 1 of the present invention, and it can be seen that the present invention has a compact packing by adding ceramic binder particles, the sintering performance is also significantly improved, and the low temperature, medium temperature, high temperature compressive strength and flexural strength are all improved by adopting a ceramic sintering technique.
4. The X-ray diffraction measurements of the finished product prepared in example 1 of the present invention are shown in fig. 2.
(1) The detection conditions and the detection results are as follows.
Spectrogram processing result, possibly neglected peaks: 2.134, 9.704 keV; and (4) processing options: oxygen by stoichiometry (normalized); the repetition times are 4; the standard samples are shown in table 5; the XRD measurement results are shown in table 6 and fig. 2.
Table 5.
C CaCO3 1-Jun-1999 12:00AM
Na Albite 1-Jun-1999 12:00AM
Mg MgO 1-Jun-1999 12:00AM
Al Al2O3 1-Jun-1999 12:00AM
Si SiO2 1-Jun-1999 12:00AM
K MAD-10Feldspar 1-Jun-1999 12:00AM
Table 6.
Element(s) Percent by weight/%) Atomic percent/%) Percent of compound/%) Chemical formula (II)
C K 9.39 14.06 34.39 CO2
Na K 0.14 0.11 0.18 Na2O
Mg K 0.37 0.28 0.62 MgO
Al K 33.85 22.57 63.97 Al2O3
Si K 0.31 0.20 0.67 SiO2
K K 0.14 0.06 0.17 K2O
O 55.80 62.73
Total amount of 100.00
As can be seen from tables 5-6 and FIGS. 1-2, unfired alumina-magnesia carbon bricks having high purity and high bonding strength can be prepared using the formulation and preparation method of the present invention.
It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the invention.

Claims (3)

1. The unburned alumina-magnesia carbon brick is characterized in that: comprises aggregate, powder, additive and bonding agent,
the aggregate comprises the following raw materials in parts by weight:
60-70 parts of brown corundum and/or special-grade bauxite, wherein the brown corundum is Al2O3 Not less than 94.5 percent and the granularity is 0.1-1 mm; special grade alumina Al2O3 More than or equal to 88 percent, and the granularity is 1-5 mm;
the powder comprises the following raw materials in parts by weight:
1-3 parts of magnesium aluminate spinel, more than or equal to 33 percent of MgO and Al2O3More than or equal to 65 percent, and the granularity is 300-400 meshes;
9-11 parts of high-purity magnesia, more than or equal to 97 percent of MgO, 400 meshes of granularity of 300-3The water content is less than or equal to 4 percent;
11-13 parts of sub-white corundum, Al2O3More than or equal to 97 percent, and the granularity is 300-400 meshes;
2-4 parts of an additive;
5-7 parts of graphite, more than or equal to 97 percent of C and less than or equal to 0.5 percent of water content;
1-3 parts of high-temperature asphalt, the softening temperature is more than or equal to 150 ℃, the residual carbon is more than or equal to 50 percent, and the granularity is 200 meshes;
0.2-0.5 part of rare earth oxide with the granularity of 300-;
3-5 parts of ceramic binder;
3-4 parts of complexing magnesium aluminum cementing agent;
1-3 parts of water;
the additive is silicon carbide or metal aluminum powder and metal silicon powder, wherein the weight part ratio of the metal aluminum powder to the metal silicon powder is 1: 1;
the high-purity magnesite comprises high-purity fused magnesite, MgO is more than or equal to 97%, the granularity is 300-400 meshes, and the volume density of particles is more than or equal to 3.45g/cm 3The water content is less than or equal to 4 percent, and the high-purity sintered magnesia has MgO more than or equal to 97 percent, the granularity of 300-400 meshes and the volume density of particles more than or equal to 3.28g/cm 3The water content is less than or equal to 4 percent, and the weight part ratio of the high-purity fused magnesia to the high-purity sintered magnesia is 1: 1;
the silicon carbide SiC is more than or equal to 97 percent, the granularity is 200 meshes, the metal aluminum powder Al is more than or equal to 98 percent, the granularity is 200 meshes, the silicon powder Si is more than or equal to 98 percent, and the granularity is 200 meshes;
the rare earth oxide is one or two of cerium oxide, praseodymium oxide and lanthanum oxide;
wherein the weight part ratio of special-grade alumina with the granularity of 1-3mm to special-grade alumina with the granularity of 3-5mm is 8-9: 4-5;
the preparation method of the unburned alumina-magnesia carbon brick comprises the following steps:
(1) processing of raw materials
Aggregate: weighing brown corundum and/or super alumina according to parts by weight, putting the brown corundum and/or super alumina into a jaw crusher for crushing, crushing the brown corundum and/or super alumina into large particles by using double rollers, screening out brown corundum and/or super alumina with the particle size of 0.1-1mm and/or 1-5mm by using a vibrating screen, and clearing accumulated materials of a storage bin and a crushing equipment system when crushing, crushing and changing materials;
powder lot: weighing high-purity fused magnesia, high-purity sintered magnesia, magnesia-alumina spinel and sub-white corundum according to parts by weight, putting the weighed high-purity fused magnesia, high-purity sintered magnesia, magnesia-alumina spinel and sub-white corundum into a jaw crusher for crushing, crushing the crushed magnesia-alumina spinel, magnesium-alumina spinel and sub-white corundum into large particles by double rollers, performing vibration screening to obtain particles with the particle size of 1-5mm, putting the particles into a Raymond mill to obtain 150-mesh fine powder, adding the fine powder into a ball mill for ball milling, wherein the ball milling speed is 200 plus materials/min, and the ball milling time is 20-30; weighing an additive, high-temperature asphalt, a rare earth oxide and a ceramic binder according to the parts by weight, and adding the additive, the high-temperature asphalt, the rare earth oxide and the ceramic binder into the powder to prepare premixed powder;
(2) mixing material
Putting the prepared aggregate into a pug mixing mill, wherein the mixing rotating speed is 20-30r/min, and the mixing time is 2-3 min; adding 2/3 parts by weight of complex magnesium aluminum cementing agent, adding water during stirring until the binding agent forms slurry to wrap the surface of the aggregate, and mixing at the speed of 20-30r/min for 4-5 min; adding graphite, mixing at 20-30r/min for 4-5 min; adding the premixed powder, mixing at the rotating speed of 20-30r/min, and stirring for 7-8 min; adding 1/3 parts by weight of complex magnesium aluminum cementing agent, mixing at 20-30r/min for 7-8min, wherein the material temperature is not lower than 20 ℃ in winter and not higher than 45 ℃ in summer;
(3) molding: weighing a certain amount of mixed materials, putting the mixed materials into a press for forming, wherein the pressure of the press is 700-1000 tons, the mixed materials in a mold are required to be scraped back and forth, four corners are filled, the mixed materials are light and heavy, the first hammer and the second hammer are used for hanging hammer operation and mold stripping and air exhausting, the number of times of mold stripping and air exhausting is 3-5, then the hammer head is lifted for heavy impact by 3-5 hammers, and the density of a formed body is more than or equal to 3.32g/cm3；
(4) And (3) drying: the formed composite green brick is put into an electric heating drying device for drying,
heating for 3h at the temperature of 20-55 ℃;
keeping the temperature at 55 +/-10 ℃ and heating for 3 h;
the temperature is raised to 55-100 ℃, and the heating time is 3 h;
keeping the temperature at 100 +/-15 ℃ and heating for 4 h;
heating for 6 hours at the temperature of 100-210 ℃;
keeping the temperature at 210 +/-10 ℃ and heating for 5 h;
and obtaining a finished product.
2. The unburned almag of claim 1, wherein: comprises aggregate, powder, additive and bonding agent,
the aggregate comprises the following raw materials in parts by weight:
53 parts of special-grade alumina, Al2O3More than or equal to 88 percent, and the granularity is 1-5 mm;
brown corundum 12 parts, Al2O3Not less than 94.5 percent and the granularity is 0.1-1 mm;
the powder comprises the following raw materials in parts by weight:
2 portions of magnesia-alumina spinel, more than or equal to 33 percent of MgO and Al2O3More than or equal to 65 percent, and the granularity is 300-400 meshes;
10 portions of high-purity magnesia, the MgO is more than or equal to 97 percent, the granularity is 300-400 meshes, and the volume density of the particles is more than or equal to 3.28g/cm3The water content is less than or equal to 4 percent;
sub-white corundum 12 parts, Al2O3More than or equal to 97 percent, and the granularity is 300-400 meshes;
3 parts of silicon carbide;
6 parts of graphite, more than or equal to 97 percent of C and less than or equal to 0.5 percent of water content;
2 parts of high-temperature asphalt, the softening temperature is more than or equal to 150 ℃, the residual carbon is more than or equal to 50 percent, and the granularity is 200 meshes;
0.4 part of rare earth oxide with the granularity of 300-;
4 parts of ceramic bond;
3.5 parts of complexing magnesium aluminum cementing agent;
1-3 parts of water.
3. The unburned almag of claim 1, wherein: comprises aggregate, powder, additive and bonding agent,
the aggregate comprises the following raw materials in parts by weight:
65 portions of brown corundum, Al 2O 3Not less than 94.5 percent and the granularity is 0.1-1 mm;
the powder comprises the following raw materials in parts by weight:
2 portions of magnesia-alumina spinel, more than or equal to 33 percent of MgO and Al2O 3More than or equal to 65 percent, and the granularity is 300-400 meshes;
10 portions of high-purity magnesia, the MgO is more than or equal to 97 percent, the granularity is 300-400 meshes, and the volume density of the particles is more than or equal to 3.28g/cm3The water content is less than or equal to 4 percent;
sub-white corundum 12 parts, Al2O3More than or equal to 97 percent, and the granularity is 300-400 meshes;
3 parts of an additive, wherein the additive comprises metal aluminum powder and metal silicon powder, and the weight part ratio of the metal aluminum powder to the metal silicon powder is 1: 1;
6 parts of graphite, more than or equal to 97 percent of C and less than or equal to 0.5 percent of water content;
2 parts of high-temperature asphalt, the softening temperature is more than or equal to 150 ℃, the residual carbon is more than or equal to 50 percent, and the granularity is 200 meshes;
0.4 part of rare earth oxide with the granularity of 300-;
4 parts of ceramic bond;
3.5 parts of complexing magnesium aluminum cementing agent;
1-3 parts of water.
CN201710284549.1A 2017-04-25 2017-04-25 Unburned alumina-magnesia carbon brick and preparation method thereof Active CN106966708B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710284549.1A CN106966708B (en) 2017-04-25 2017-04-25 Unburned alumina-magnesia carbon brick and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710284549.1A CN106966708B (en) 2017-04-25 2017-04-25 Unburned alumina-magnesia carbon brick and preparation method thereof

Publications (2)

Publication Number Publication Date
CN106966708A CN106966708A (en) 2017-07-21
CN106966708B true CN106966708B (en) 2020-12-08

Family

ID=59332669

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710284549.1A Active CN106966708B (en) 2017-04-25 2017-04-25 Unburned alumina-magnesia carbon brick and preparation method thereof

Country Status (1)

Country Link
CN (1) CN106966708B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107805058B (en) * 2017-11-01 2020-09-25 瑞泰马钢新材料科技有限公司 Corundum bottom-covering brick for steel ladle and preparation method thereof
CN107793166A (en) * 2017-12-11 2018-03-13 辽宁科技大学 Zn Rotary Kiln electric smelting is in conjunction with alumina magnesia-chrome fire brick and preparation method thereof
CN112279655A (en) * 2020-10-30 2021-01-29 攀钢冶金材料有限责任公司 Binding agent, magnesium ramming mass and preparation method thereof
CN112358305A (en) * 2020-11-17 2021-02-12 武汉钢铁集团耐火材料有限责任公司 Electric furnace ladle wall magnesia carbon brick capable of preventing longitudinal cracking and preparation process thereof
CN113045299A (en) * 2021-05-19 2021-06-29 鞍山市安力耐火材料有限公司 Machine-pressed carbon-free steel ladle brick containing composite binder and preparation method thereof
CN115974564A (en) * 2022-12-30 2023-04-18 东北大学 In-situ reinforced low-carbon magnesia-carbon refractory material and preparation method thereof
CN117303919B (en) * 2023-10-19 2024-03-08 郑州金河源耐火材料有限公司 Unfired chrome corundum refractory brick and preparation method thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100194333B1 (en) * 1996-12-24 1999-06-15 서상기 Magnesia-alumina-carbon basic bricks for ladle
CN101985223A (en) * 2010-07-20 2011-03-16 郑州振东耐磨材料有限公司 Secondary mould returning method of magnesium carbon brick and alumina-magnesite carbon brick used for steel ladle
CN102167569A (en) * 2010-12-28 2011-08-31 高树森 Bauxite-based nanometer composite oxide ceramic bond A1203-MgO-C unfired product and preparation method thereof
CN103787678A (en) * 2012-11-03 2014-05-14 无锡成博科技发展有限公司 Preparation method of aluminum-magnesium carbon steel ladle refractory bricks
CN103992126A (en) * 2014-05-30 2014-08-20 浙江自立股份有限公司 Method for preparing tabular corundum brick for working lining of carbon-free steel ladle
CN106278324A (en) * 2016-08-22 2017-01-04 大石桥市中建镁砖有限公司 A kind of modified high-purity magnesium-aluminum spinel composite brick and preparation method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100194333B1 (en) * 1996-12-24 1999-06-15 서상기 Magnesia-alumina-carbon basic bricks for ladle
CN101985223A (en) * 2010-07-20 2011-03-16 郑州振东耐磨材料有限公司 Secondary mould returning method of magnesium carbon brick and alumina-magnesite carbon brick used for steel ladle
CN102167569A (en) * 2010-12-28 2011-08-31 高树森 Bauxite-based nanometer composite oxide ceramic bond A1203-MgO-C unfired product and preparation method thereof
CN103787678A (en) * 2012-11-03 2014-05-14 无锡成博科技发展有限公司 Preparation method of aluminum-magnesium carbon steel ladle refractory bricks
CN103992126A (en) * 2014-05-30 2014-08-20 浙江自立股份有限公司 Method for preparing tabular corundum brick for working lining of carbon-free steel ladle
CN106278324A (en) * 2016-08-22 2017-01-04 大石桥市中建镁砖有限公司 A kind of modified high-purity magnesium-aluminum spinel composite brick and preparation method thereof

Also Published As

Publication number Publication date
CN106966708A (en) 2017-07-21

Similar Documents

Publication Publication Date Title
CN106966708B (en) Unburned alumina-magnesia carbon brick and preparation method thereof
US7939458B2 (en) Refractory brick
CN106866117B (en) Unfired modified high-purity magnesium aluminate spinel composite brick and preparation method thereof
US8821633B2 (en) Cast bodies, castable compositions, and methods for their production
CN103204691A (en) Low-heat conductance silicon corundum brick material and silicon corundum composite brick made of same
JP5943032B2 (en) Manufacturing method of lightweight heat-insulating alumina / magnesia refractory
CN108083765A (en) Low heat conduction anti-strip brick and preparation method thereof
CN103508740B (en) Ramming mass for repairing gap bridge magnesia-alumina spinel bricks of sleeve lime kiln
CN106830955B (en) Method for preparing unfired modified high-purity magnesium aluminate spinel composite brick by microwave drying
CN106631061B (en) A kind of flue wall high thermal conductivity magnesium-rich spinel composite brick and preparation method thereof
Mohammadihooyeh et al. Effect of magnesium-aluminate spinel nano-particles on microstructure and properties behaviors of doloma-containing refractories
CN113968724B (en) Metal modified magnesia, low-carbon converter magnesium sliding plate and preparation method thereof
Othman et al. Recycling of spent magnesite and ZAS bricks for the production of new basic refractories
JP4546934B2 (en) Manufacturing method of irregular refractories using refractories after use
JP4141158B2 (en) SiC for amorphous refractories with excellent corrosion resistance, spalling resistance, and drying properties, and raw materials for amorphous refractories
Hubble Steel plant refractories
CN112707719A (en) Method for preparing periclase-spinel composite material by coating process
JP2604310B2 (en) Pouring refractories
CN103172394B (en) Refractory brick and preparation method thereof
Doroganov et al. Plastic molding refractory mixes based on highly concentrated ceramic binding suspensions of high alumina fireclay
JP3523807B2 (en) Tundish lining structure
Pivinskii New refractory concretes and binding systems: Basic trends of development, production, and use of refractories in the 21st century. Part IV. Low-cement concretes and cement-free unshaped refractories
CN111825433A (en) Special high-strength wear-resistant high-alumina brick for lime kiln lining and preparation method thereof
JPH08169754A (en) Monolithic refractory molded body and its production
JPH10236881A (en) Basic spray material

Legal Events

Date Code Title Description
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
TA01 Transfer of patent application right
TA01 Transfer of patent application right

Effective date of registration: 20201113

Address after: Boluopu town Boluopu village, Dashiqiao City, Yingkou City, Liaoning Province

Applicant after: DASHIQIAO GUANCHENG REFRACTORY Co.,Ltd.

Address before: 118000, Wanda Plaza, A, Garden Street, Zhenxing District, Liaoning, Dandong, 1403

Applicant before: Sun Guang

Applicant before: Guo Quanying

Applicant before: Hong Xueqin

GR01 Patent grant
GR01 Patent grant