CN112079629A - Anti-oxidation high-strength magnesia carbon brick - Google Patents
Anti-oxidation high-strength magnesia carbon brick Download PDFInfo
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- CN112079629A CN112079629A CN201910515908.9A CN201910515908A CN112079629A CN 112079629 A CN112079629 A CN 112079629A CN 201910515908 A CN201910515908 A CN 201910515908A CN 112079629 A CN112079629 A CN 112079629A
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- 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
- C04B35/03—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 magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—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 magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
- C04B35/043—Refractories from grain sized mixtures
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- 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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- 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
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- 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
- C04B2235/3225—Yttrium oxide or oxide-forming salts thereof
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- C—CHEMISTRY; METALLURGY
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- 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
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
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- 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
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- 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
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- 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
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
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- Ceramic Engineering (AREA)
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- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention relates to an antioxidant high-strength magnesia carbon brick, which mainly comprises the following components: 40-60 parts of magnesia particles, 8-25 parts of magnesia-alumina spinel particles, 20-30 parts of magnesia fine powder, 5-8 parts of corundum fine powder, 1-5 parts of crystalline flake graphite, 2-4 parts of silicon carbide, 1.5-2.5 parts of sodium tripolyphosphate, 3-8 parts of pyrophyllite particles, 2-6 parts of a mixture of high furan resin and phenolic resin and 1.5-3.5 parts of rare earth oxide; the magnesia carbon brick has the advantages of high strength at medium and high temperature and good oxidation resistance.
Description
Technical Field
The invention relates to the technical field of refractory brick preparation, in particular to an antioxidant high-strength magnesia carbon brick.
Background
Magnesia carbon bricks are produced by using a high-melting point basic oxide magnesium oxide (melting point 2800 ℃) and a high-melting point carbon material which is difficult to be infiltrated by slag as raw materials, and adding various non-oxide additives. The non-burning carbon composite refractory material is formed by combining carbon binders. The magnesia carbon brick is mainly used for the inner liners of converters, alternating current electric arc furnaces and direct current electric arc furnaces, slag lines of ladles and other parts.
The existing magnesia carbon brick is still easy to be lost when being used at a slag line part, and is easy to be corroded in the process of being washed by molten steel, and the conventional magnesia carbon brick has poor high-temperature plasticity and is easy to crack when bearing stress.
Disclosure of Invention
In order to solve the technical problems, the invention provides a magnesia carbon brick with good durability and corrosion resistance, and the invention provides the following technical scheme:
an antioxidant high-strength magnesia carbon brick comprises the following components: 40-60 parts of magnesia particles, 8-25 parts of magnesia-alumina spinel particles, 20-30 parts of magnesia fine powder, 5-8 parts of corundum fine powder, 1-5 parts of crystalline flake graphite, 2-4 parts of silicon carbide, 1.5-2.5 parts of sodium tripolyphosphate, 3-8 parts of pyrophyllite particles, 2-6 parts of a mixture of high furan resin and phenolic resin and 1.5-3.5 parts of rare earth oxide. According to the formula, the silicon carbide and the pyrophyllite particles are mixed, so that the high-temperature strength of the refractory brick can be improved, and meanwhile, the high-furan resin is used for replacing part of phenolic resin, so that a better combination effect can be achieved.
Further, the corundum fine powder comprises one or a mixture of two of brown corundum fine powder and colorless corundum fine powder. Experiments prove that the mixture of two corundum fine powders is beneficial to improving the compactness and uniformity of the internal structure of the magnesia carbon brick.
Further, the silicon carbide is activated silicon carbide.
Further, the pyrophyllite particles are low-aluminum-grade pyrophyllite particles. Avoids the loss of high-temperature strength caused by introducing excessive aluminum elements into the magnesia carbon brick product.
Further, the mass ratio of the high furan resin to the phenolic resin is 1: 3-5. Too high a furan resin ratio easily causes too high dispersibility of the material, and too high a phenolic resin ratio is not favorable for improving the associativity of the material.
Further, the rare earth oxide is yttrium oxide.
The invention has the beneficial effects that:
(1) the high-temperature strength of the refractory brick can be improved by mixing silicon carbide and pyrophyllite particles;
(2) the high furan resin is adopted to replace part of phenolic resin, so that a better combination effect can be achieved;
(3) the mixture of two kinds of corundum fine powder is favorable for improving the compactness and uniformity of the internal structure of the magnesia carbon brick.
Detailed Description
Examples 1,
An antioxidant high-strength magnesia carbon brick comprises the following components: 50 parts of magnesia particles, 16 parts of magnesia-alumina spinel particles, 25 parts of magnesia fine powder, 3.5 parts of brown corundum fine powder, 2.5 parts of colorless corundum fine powder, 3 parts of crystalline flake graphite, 3 parts of active silicon carbide, 2 parts of sodium tripolyphosphate, 5.5 parts of low-aluminum pyrophyllite particles, 1.5 parts of high furan resin, 4 parts of phenolic resin and 2.5 parts of yttrium oxide.
Examples 2,
An antioxidant high-strength magnesia carbon brick comprises the following components: 40 parts of magnesia particles, 8 parts of magnesia-alumina spinel particles, 20 parts of magnesia fine powder, 3 parts of brown corundum fine powder, 2 parts of colorless corundum fine powder, 1 part of crystalline flake graphite, 2 parts of active silicon carbide, 1.5 parts of sodium tripolyphosphate, 3 parts of low-aluminum pyrophyllite particles, 1 part of high furan resin, 3 parts of phenolic resin and 1.5 parts of yttrium oxide.
Examples 3,
An antioxidant high-strength magnesia carbon brick comprises the following components: 60 parts of magnesia particles, 25 parts of magnesia-alumina spinel particles, 30 parts of magnesia fine powder, 4 parts of brown corundum fine powder, 3 parts of colorless corundum fine powder, 5 parts of crystalline flake graphite, 4 parts of active silicon carbide, 2.5 parts of sodium tripolyphosphate, 8 parts of low-aluminum pyrophyllite particles, 2 parts of high furan resin, 5 parts of phenolic resin and 3.5 parts of yttrium oxide.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The oxidation-resistant high-strength magnesia carbon brick is characterized by comprising the following components: 40-60 parts of magnesia particles, 8-25 parts of magnesia-alumina spinel particles, 20-30 parts of magnesia fine powder, 5-8 parts of corundum fine powder, 1-5 parts of crystalline flake graphite, 2-4 parts of silicon carbide, 1.5-2.5 parts of sodium tripolyphosphate, 3-8 parts of pyrophyllite particles, 2-6 parts of a mixture of high furan resin and phenolic resin and 1.5-3.5 parts of rare earth oxide.
2. The oxidation-resistant high-strength magnesia carbon brick according to claim 1, wherein: the corundum fine powder comprises one or a mixture of two of brown corundum fine powder and colorless corundum fine powder.
3. The oxidation-resistant high-strength magnesia carbon brick according to claim 1, wherein: the silicon carbide is active silicon carbide.
4. The oxidation-resistant high-strength magnesia carbon brick according to claim 1, wherein: the pyrophyllite particles are low-aluminum-grade pyrophyllite particles.
5. The oxidation-resistant high-strength magnesia carbon brick according to claim 1, wherein: the mass ratio of the high furan resin to the phenolic resin is 1: 3-5.
6. The oxidation-resistant high-strength magnesia carbon brick according to claim 1, wherein: the rare earth oxide is yttrium oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910515908.9A CN112079629A (en) | 2019-06-14 | 2019-06-14 | Anti-oxidation high-strength magnesia carbon brick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910515908.9A CN112079629A (en) | 2019-06-14 | 2019-06-14 | Anti-oxidation high-strength magnesia carbon brick |
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| Publication Number | Publication Date |
|---|---|
| CN112079629A true CN112079629A (en) | 2020-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910515908.9A Pending CN112079629A (en) | 2019-06-14 | 2019-06-14 | Anti-oxidation high-strength magnesia carbon brick |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115259839A (en) * | 2022-07-25 | 2022-11-01 | 中冶武汉冶金建筑研究院有限公司 | Integral refractory castable for preheating section side wall of belt type roasting machine and preparation method thereof |
-
2019
- 2019-06-14 CN CN201910515908.9A patent/CN112079629A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115259839A (en) * | 2022-07-25 | 2022-11-01 | 中冶武汉冶金建筑研究院有限公司 | Integral refractory castable for preheating section side wall of belt type roasting machine and preparation method thereof |
| CN115259839B (en) * | 2022-07-25 | 2023-03-21 | 中冶武汉冶金建筑研究院有限公司 | Integral refractory castable for preheating section side wall of belt type roasting machine and preparation method thereof |
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20201215 |
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| WD01 | Invention patent application deemed withdrawn after publication |