CN107244907A - A kind of toughening aluminum oxide hollow balls brick - Google Patents

A kind of toughening aluminum oxide hollow balls brick Download PDF

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Publication number
CN107244907A
CN107244907A CN201710395327.7A CN201710395327A CN107244907A CN 107244907 A CN107244907 A CN 107244907A CN 201710395327 A CN201710395327 A CN 201710395327A CN 107244907 A CN107244907 A CN 107244907A
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Prior art keywords
brick
aluminum oxide
parts
hollow balls
toughening
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CN201710395327.7A
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Chinese (zh)
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徐华
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Changxin Huayue Refractory Material Factory
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Changxin Huayue Refractory Material Factory
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Priority to CN201710395327.7A priority Critical patent/CN107244907A/en
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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
    • C04B35/10—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
    • C04B35/106—Refractories from grain sized mixtures containing zirconium oxide or zircon (ZrSiO4)
    • 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
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
    • 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
    • C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
    • 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
    • C04B2235/3262—Manganese oxides, manganates, rhenium oxides or oxide-forming salts thereof, e.g. MnO
    • C04B2235/3267—MnO2
    • 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
    • C04B2235/34—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
    • C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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    • 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
    • C04B2235/404—Refractory metals
    • 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
    • C04B2235/52—Constituents or additives characterised by their shapes
    • C04B2235/528—Spheres
    • 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
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    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

The invention provides a kind of toughening aluminum oxide hollow balls brick, the toughening aluminum oxide hollow balls brick includes the component of following parts by weight：0.5~1 part of 50~70 parts of alumina hollow ball, 7~13 parts of electro-corundum powder, 1~3 part of calcium carbonate, 3~6 parts of silica, 0.5~1 part of zirconium oxide, 2~5 parts of manganese dioxide and metal molybdenum.The present invention adds a variety of auxiliary agents in recipe ingredient, the synergy occurred by auxiliary agent and alumina hollow ball, improves the intensity and usage cycles of toughening aluminum oxide hollow balls brick, its resistance to heat shocks is greatly strengthen, so as to extend service life.

Description

A kind of toughening aluminum oxide hollow balls brick
Technical field
The present invention relates to technical field of refractory materials, more particularly to the toughness reinforcing oxidation that a kind of stability is good, resistance to heat shocks is high Aluminium hollow ball brick.
Background technology
Alumina bubble brick is because with alumina content is high, bulk density is small, elevated temperature strength is big, temperature in use is high, lead Hot coefficient is small, be widely used in petrochemical industry high temperature kiln the advantages of save the energy, and it both can be used as heat-insulating heat-preserving material, Available for hot operation lining material.It is unstable based on part composition performance in existing alumina bubble brick so that existing oxygen Change aluminium hollow ball brick and have the shortcomings that broken, resistance to heat shocks is not high, cause its usage cycles short, the consequence of waste of materials, greatly The big extensive use for hindering alumina bubble brick.
" a kind of new alumina bubble brick " is disclosed in Chinese patent literature, its notification number is CN105294024A, the invention forms CA6 combination phases by being introduced into calcium carbonate in matrix, is effectively reduced or avoids material from making The generation of silicon migration during, while can also improve the temperature in use of material, is effectively reduced heat and scatters and disappears, energy-conserving and environment-protective. But, the invention does not have the shortcoming for solving that alumina bubble brick is broken, resistance to heat shocks is not high.Therefore, how to tradition It is those skilled in the art's technical problem urgently to be resolved hurrily that the formula of alumina bubble brick, which is modified and improves its resistance to heat shocks,.
The content of the invention
There is provided one kind in order to overcome the problem of conventional aluminium oxide hollow ball brick is broken, resistance to heat shocks is not high by the present invention The toughening aluminum oxide hollow balls brick that stability is good, resistance to heat shocks is high.
To achieve these goals, the present invention uses following technical scheme：
A kind of toughening aluminum oxide hollow balls brick, the toughening aluminum oxide hollow balls brick includes the component of following parts by weight：Aluminum oxide 50~70 parts of hollow ball, 7~13 parts of electro-corundum powder, 1~3 part of calcium carbonate, 3~6 parts of silica, 0.5~1 part of zirconium oxide.
A small amount of zirconium oxide is added in the formula of the alumina bubble brick of the present invention, can be to alumina bubble brick Obvious toughening effect is produced, its principle is as follows：The thermal coefficient of expansion of alumina hollow ball in the system is big, modulus of elasticity Height, acts on strong, cut off diameter Dc is larger after sintering cooling to the constraints of zirconia particles, tetragonal zircite particle can with it is more more Effectively remain, it is therefore, also obvious to the toughening effect of alumina bubble brick, so as to reach its resistance to thermal shock of raising Property effect, the intensity of obtained toughening aluminum oxide hollow balls brick is big, and non-breakable, usage cycles are long.
Calcium carbonate and silica are added, CaO+SiO can be formed in sintering process2System, not only produces liquid phase, and And the flat crystal with straight crystal grain is produced in the base, the resistance to thermal shock of toughening aluminum oxide hollow balls brick can be greatly improved Property.
Preferably, the toughening aluminum oxide hollow balls brick also includes 0.5~1 part of 2~5 parts of manganese dioxide and metal molybdenum.
Metal molybdenum, is approached, difference only 2.3 × 10 as a kind of refractory metal and aluminum oxide thermal coefficient of expansion-6, with good Heat endurance, its sintering character is also close with aluminum oxide, and interoperability is good；Metal molybdenum and dioxy are added in system simultaneously Changing manganese has following synergy：In sintering process, with alumina hollow ball chemical reaction generation occurs for manganese dioxide MnAl2O4, with paste of the metal molybdenum formation containing hole, now, the silica of molten can soak and fill this some holes Gap, by Mo, MnAl2O4、Al2O3Three's secure bond together, greatly reduces the porosity of toughening aluminum oxide hollow balls brick, Bulk density is increased, it is achieved thereby that the significantly lifting of intensity and resistance to heat shocks.
Preferably, the granularity of the alumina hollow ball is 5~3mm, 3~1mm and 0.5~0.1mm.
The consistency of the paired base substrate of particle group of blank has a great impact, and certain amount is added in the composition of bulky grain The less particle of size, is filled in the gap of bulky grain, and the porosity of base substrate can be caused to decline, bulk density increase, makes embryo Body becomes the product with certain size, shape and structural strength so that the bulk density of material, compressive resistance and high temperatures It can be improved, be obviously improved the physicochemical property of toughening aluminum oxide hollow balls brick.
Preferably, the granularity of the electro-corundum powder is not more than 500 mesh, particle is thinner, easier sintering, sintering Temperature is also lower, can reduce energy consumption, cost-effective.
Preferably, the natural deposited dry density of the calcium carbonate is less than 0.2g/cm3。
The present invention has the advantages that：Acted synergistically by a variety of auxiliary agents and alumina hollow ball, improve and increase The intensity and usage cycles of tough alumina bubble brick, greatly strengthen its resistance to heat shocks, so as to extend service life.
Embodiment
Below by specific embodiment, technical scheme is described in further detail.
In the present invention, if not refering in particular to, all devices and raw material are commercially available or the industry is conventional, following Method in embodiment, is this area conventional method unless otherwise instructed.
Embodiment 1：
A kind of toughening aluminum oxide hollow balls brick, including following component：Alumina hollow ball 50g (5~3mm alumina hollow balls 30g, 3~1mm alumina hollow ball 15g, 0.5~0.1mm alumina hollow ball 5g), electro-corundum powder 7g (granularities 400 mesh), calcium carbonate (natural deposited dry density 0.1g/cm3) 1g, silica 3g, zirconium oxide 0.5g, manganese dioxide 2g, metal molybdenum 0.5g。
Embodiment 2：
A kind of toughening aluminum oxide hollow balls brick, including following component：Alumina hollow ball 70g (5~3mm alumina hollow balls 40g, 3~1mm alumina hollow ball 20g, 0.5~0.1mm alumina hollow ball 10g), electro-corundum powder 13g (granularities 350 mesh), calcium carbonate (natural deposited dry density 0.15g/cm3) 3g, silica 6g, zirconium oxide 1g, manganese dioxide 5g, metal molybdenum 1g。
Embodiment 3：
A kind of toughening aluminum oxide hollow balls brick, including following component：Alumina hollow ball 60g (5~3mm alumina hollow balls 25g, 3~1mm alumina hollow ball 18g, 0.5~0.1mm alumina hollow ball 17g), electro-corundum powder 10g (granularities 500 mesh), calcium carbonate (natural deposited dry density 0.05g/cm3) 2g, silica 5g, zirconium oxide 0.7g, manganese dioxide 3g, metal Molybdenum 0.7g.
Comparative example
Comparative example, which is used, is not added with oxidation in commercial alumina hollow ball brick, the recipe ingredient of the commercial alumina hollow ball brick Any one of zirconium, manganese dioxide and metal molybdenum.
Performance detection is carried out to embodiment 1-3 and the alumina bubble brick of comparative example, as a result as shown in table 1.
The physical and chemical index testing result of table 1.
The toughening aluminum oxide hollow balls brick of the present invention is empty relative to commercial alumina it can be seen from the physical and chemical index result of table 1 Bulbus cordis brick has good compressive resistance and thermal shock resistance energy, and work is cooperateed with alumina hollow ball by a variety of auxiliary agents With the intensity and usage cycles of raising toughening aluminum oxide hollow balls brick, so as to extend service life.

Claims (5)

1. a kind of toughening aluminum oxide hollow balls brick, it is characterised in that the toughening aluminum oxide hollow balls brick includes following parts by weight Component：50~70 parts of alumina hollow ball, 7~13 parts of electro-corundum powder, 1~3 part of calcium carbonate, 3~6 parts of silica, oxygen Change 0.5~1 part of zirconium.
2. a kind of toughening aluminum oxide hollow balls brick according to claim 1, it is characterised in that the toughened aluminum oxide is hollow Ball brick also includes 0.5~1 part of 2~5 parts of manganese dioxide and metal molybdenum.
3. a kind of toughening aluminum oxide hollow balls brick according to claim 1 or 2, it is characterised in that the aluminum oxide is hollow The granularity of ball is 5~3mm, 3~1mm and 0.5~0.1mm.
4. a kind of toughening aluminum oxide hollow balls brick according to claim 1, it is characterised in that of the electro-corundum powder Granularity is not more than 500 mesh.
5. a kind of toughening aluminum oxide hollow balls brick according to claim 2 or 4, it is characterised in that the calcium carbonate from Right bulk density is less than 0.2g/cm3。
CN201710395327.7A 2017-05-26 2017-05-26 A kind of toughening aluminum oxide hollow balls brick Pending CN107244907A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101508562A (en) * 2009-04-07 2009-08-19 广东东方锆业科技股份有限公司 Aluminum oxide toughening structure ceramic material and method of producing the same
CN102234201A (en) * 2010-05-05 2011-11-09 孝感正华电真空材料有限责任公司 Metallization process of isostatic pressing porcelain tube for vacuum switch tube
CN103708841A (en) * 2013-12-05 2014-04-09 山东耐材集团鲁耐窑业有限公司 High strength and high thermal shock alumina bubble brick and preparation method thereof
CN104193356A (en) * 2014-08-12 2014-12-10 宜兴瑞泰耐火材料有限公司 High-purity hollow alumina sphere brick applied to coal water slurry gasifier and preparation process thereof
CN105294024A (en) * 2015-11-19 2016-02-03 长兴县新宏信耐火材料有限公司 Novel alumina bubble brick

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101508562A (en) * 2009-04-07 2009-08-19 广东东方锆业科技股份有限公司 Aluminum oxide toughening structure ceramic material and method of producing the same
CN102234201A (en) * 2010-05-05 2011-11-09 孝感正华电真空材料有限责任公司 Metallization process of isostatic pressing porcelain tube for vacuum switch tube
CN103708841A (en) * 2013-12-05 2014-04-09 山东耐材集团鲁耐窑业有限公司 High strength and high thermal shock alumina bubble brick and preparation method thereof
CN104193356A (en) * 2014-08-12 2014-12-10 宜兴瑞泰耐火材料有限公司 High-purity hollow alumina sphere brick applied to coal water slurry gasifier and preparation process thereof
CN105294024A (en) * 2015-11-19 2016-02-03 长兴县新宏信耐火材料有限公司 Novel alumina bubble brick

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