CN105859271A - Muscovite-based refractory brick for gas producer - Google Patents

Muscovite-based refractory brick for gas producer Download PDF

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Publication number
CN105859271A
CN105859271A CN201610307420.3A CN201610307420A CN105859271A CN 105859271 A CN105859271 A CN 105859271A CN 201610307420 A CN201610307420 A CN 201610307420A CN 105859271 A CN105859271 A CN 105859271A
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powder
refractory brick
andalusite
white mica
gas generator
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姚成立
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Zongyang Haili Machinery Manufacturing Co Ltd
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Zongyang Haili Machinery Manufacturing Co Ltd
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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
    • C04B35/16—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 silicates other than clay
    • C04B35/18—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 silicates other than clay rich in aluminium oxide
    • C04B35/19—Alkali metal aluminosilicates, e.g. spodumene
    • 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
    • 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
    • C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
    • 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
    • C04B2235/3201—Alkali metal 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
    • C04B2235/3205—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
    • C04B2235/3217—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
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3241—Chromium oxides, chromates, 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
    • C04B2235/34—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
    • 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
    • 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
    • C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite

Abstract

The invention relates to the field of gas producers, in particular to a muscovite-based refractory brick for a gas producer, made with: 35-45% of muscovite, 15-25% of bauxite, 15-25% of clay, 10-20% of saw dust, 5-10% of tabular corundum, 1-6% of silica powder, 1-6% of oxidized alumina powder, 1-4% of andalusite, 0.5-2% of calcium aluminate, 1-5% of an additive, and 0.5-2% of a coagulant; a production method of the brick includes the following steps: (1), crushing; (2), mixing; (3), ageing; (4), sintering; (5), holding temperature; (6), forming; (7), curing. The refractory brick of the invention is simple to manufacture, controllable in cost and good in high temperature resistance; since a large quantity of muscovite is used herein and muscovite has inherent characteristics, the refractory brick of the invention is better in high temperature resistance, physiochemical performances, acid resistance, alkali resistance and compressive strength than traditional refractory bricks.

Description

A kind of gas generator refractory brick based on white mica
Technical field
The present invention relates to gas generator field, a kind of gas generator refractory brick based on white mica.
Background technology
Gas generator is the production that coal is converted into imflammable gas coal gas (being mainly composed of CO, H2, CH4 etc.) Equipment, part gas generator uses refractory brick to pile up and forms.Its operation principle is: sieved by the coal meeting gasifying process index After choosing, firing machine join in gas stove, blast self-produced steam with air gas mixture as gasifying agent from furnace bottom.Coal exists Through physics, chemical reaction in stove, generating imflammable gas, gas in upper segment is through cyclone oil remover, electric trapper filtered tar. hypomere Coal gas, through cyclone dust extractor dust out, is transported to user after mixing and uses.
Refractory brick is called for short firebrick.The refractory material being fired into refractory clay or other refractory raw materials.Faint yellow or band brown.Energy The high temperature of resistance to 1580 DEG C 1770 DEG C.Also firebrick it is.There is the refractory material of definite shape and size.By process of preparing Division can be divided into burnt brick, unburned brick, fused cast refractories (molten-cast brick), refratory insulating brick；Standard type can be divided into by shape and size Brick, common brick, special shaped brick etc..Can be used as building kiln and the high temperature construction material of various Thermal Equipment and structural material, and At high temperature it is amenable to various physicochemical change and mechanism.Such as chamotte brick, high-alumina brick, silica brick, magnesia brick etc..
White mica (Muscovite) be also common Muscovitum, muscovite or Muscovitum, is the one in mica mineral.White mica It is good electrical insulator and heat insulator, and it can be produced in a large number, therefore has important economic worth.Its product general In metamorphic rock, but also originate in the rocks such as granite.
The characteristic of white mica is insulation, high temperature resistant, glossy, physical and chemical performance is stable, has good thermal insulation, elasticity And toughness.The industrial insulating properties mainly utilizing it and thermostability, and antiacid, alkali resistance, resistance to compression and dividing property of stripping, be used as electricity Gas equipment and the insulant of electrotechnical apparatus；Secondly for manufacturing steam boiler, the stove window of smelting furnace and part mechanically.
Summary of the invention
For the problems of the prior art, present invention is primarily targeted at, promote the fire resistant quality of existing refractory brick, improve resistance to Firebrick service life, so that refractory brick has more the value in industry.
The object of the invention to solve the technical problems realizes by the following technical solutions.The one proposed according to the present invention Gas generator refractory brick based on white mica, its formula consists of: white mica 35%-45%, bauxite 15%-25%, clay 15%-25%, wood flour 10%-20%, plate diamond spar 5%-10%, silicon powder 1%-6%, alumina powder 1%-6%, andalusite 1%-4%, Calcium aluminate 0.5%-2%, additive 1%-5%, coagulant 0.5%-2%；
Preferably, its formula consists of: white mica 40%, bauxite 15%, clay 15%, wood flour 15%, plate diamond spar 5%, Silicon powder 2%, alumina powder 2%, andalusite 1%, calcium aluminate 0.5%, additive 2%, coagulant 1.5%.
Preferably, described additive is Cr2O3, and described coagulant is sodium aluminate.
A kind of gas generator refractory brick based on white mica of the present invention, its preparation process comprises the following steps:
(1) pulverize: the components in certain proportion in above-mentioned formula is configured, use double-roll crusher above-mentioned formula will to remove andalusite and wood Material outside bits mixes and pulverizes, and then wears into mixed-powder with ball mill and sieves, and mixed-powder fineness is 205 mesh, Wood flour Raymond machine is levigate and sieves, and wood flour fineness is less than 1mm, and andalusite double-roll crusher is individually pulverized and enters ball mill Pulverizing powder also sieves, and andalusite fineness of powder is 86 mesh；
(2) batch mixing: use Secondary mixing, above-mentioned mixed-powder, wood flour and andalusite powder are together placed in blender, Mixing time is 2-3min for the first time, and rotating speed is 80-120r/min, is subsequently adding the water of 10%-12% and is allowed to be mixed into plastic Shape, mixing time is 4-5min for the second time, and rotating speed is 150-210r/min；
(3) ageing mixture: ageing mixture is carried out in ageing mixture storehouse, the ageing mixture time is 10h, and ageing mixture equipment uses reversible moving formula distributing device；
(4) sintering: firing temperature uses 1400-1600 DEG C；
(5) insulation: temperature retention time is 4-6h；
(6) molding: molding uses semi-hard plastic double-stage vacuum extruding machine, and briquetting pressure is 10MPa, a size of 240mm × 115mm × 90mm or 390mm × 190mm × 190mm；
(7) maintenance: at room temperature maintenance 48h.
Preferably, firing temperature uses 1450-1500 DEG C, and optimum temperature is 1500 DEG C.
By technique scheme, the refractory brick of the present invention at least has the advantage that
The refractory brick of the present invention is simple to manufacture, and cost is controlled, and resistance to elevated temperatures is excellent, and making in a large number due to white mica of the present invention With, and the inherent character of white mica itself so that high temperature resistant, physical and chemical performance, antiacid, the alkali resistant of refractory brick of the present invention Property, the more traditional refractory brick of resistance to compression are the most higher.
Detailed description of the invention
For the technological means making the present invention realize, creation characteristic, reach purpose and be easy to understand with effect, below in conjunction with tool Body embodiment, is expanded on further the present invention.
Embodiment 1
A kind of gas generator refractory brick based on white mica of the present invention, its formula consists of: white mica 40%, aluminum Alumina 15%, clay 15%, wood flour 15%, plate diamond spar 5%, silicon powder 2%, alumina powder 2%, andalusite 1%, aluminic acid Calcium 0.5%, additive 2%, coagulant 1.5%.
Preferably, described additive is Cr2O3, and described coagulant is sodium aluminate.
A kind of gas generator refractory brick based on white mica of the present invention, its preparation process comprises the following steps:
(1) pulverize: the components in certain proportion in above-mentioned formula is configured, use double-roll crusher above-mentioned formula will to remove andalusite and wood Material outside bits mixes and pulverizes, and then wears into mixed-powder with ball mill and sieves, and mixed-powder fineness is 205 mesh, Wood flour Raymond machine is levigate and sieves, and wood flour fineness is less than 1mm, and andalusite double-roll crusher is individually pulverized and enters ball mill Pulverizing powder also sieves, and andalusite fineness of powder is 86 mesh；
(2) batch mixing: use Secondary mixing, above-mentioned mixed-powder, wood flour and andalusite powder are together placed in blender, Mixing time is 2-3min for the first time, and rotating speed is 80-120r/min, is subsequently adding the water of 10%-12% and is allowed to be mixed into plastic Shape, mixing time is 4-5min for the second time, and rotating speed is 150-210r/min；
(3) ageing mixture: ageing mixture is carried out in ageing mixture storehouse, the ageing mixture time is 10h, and ageing mixture equipment uses reversible moving formula distributing device；
(4) sintering: firing temperature uses 1400-1600 DEG C；
(5) insulation: temperature retention time is 4-6h；
(6) molding: molding uses semi-hard plastic double-stage vacuum extruding machine, and briquetting pressure is 10MPa, a size of 240mm × 115mm × 90mm or 390mm × 190mm × 190mm；
(7) maintenance: at room temperature maintenance 48h.
Preferably, firing temperature uses 1450-1500 DEG C, and optimum temperature is 1500 DEG C.
The ultimate principle of the present invention, principal character and advantage have more than been shown and described.Skilled person will appreciate that of the industry, The present invention is not restricted to the described embodiments, the principle that the present invention is simply described of the description in above-mentioned embodiment and description, Without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, and these changes and improvements all fall Enter in the scope of protection of present invention.Claimed scope is defined by appending claims and equivalent thereof.

Claims (5)

1. a gas generator refractory brick based on white mica, it is characterised in that: its formula consists of: white mica 35%-45%, Bauxite 15%-25%, clay 15%-25%, wood flour 10%-20%, plate diamond spar 5%-10%, silicon powder 1%-6%, aluminium oxide are micro- Powder 1%-6%, andalusite 1%-4%, calcium aluminate 0.5%-2%, additive 1%-5%, coagulant 0.5%-2%.
A kind of gas generator refractory brick based on white mica the most according to claim 1, it is characterised in that: its formula Consist of: white mica 40%, bauxite 15%, clay 15%, wood flour 15%, plate diamond spar 5%, silicon powder 2%, aluminium oxide are micro- Powder 2%, andalusite 1%, calcium aluminate 0.5%, additive 2%, coagulant 1.5%.
A kind of gas generator refractory brick based on white mica the most according to claim 1, it is characterised in that: described Additive is Cr2O3, and described coagulant is sodium aluminate.
A kind of gas generator refractory brick based on white mica the most according to claim 1 and 2, it is characterised in that: system Standby process comprises the following steps:
(1) pulverize: the components in certain proportion in above-mentioned formula is configured, use double-roll crusher above-mentioned formula will to remove andalusite and wood Material outside bits mixes and pulverizes, and then wears into mixed-powder with ball mill and sieves, and mixed-powder fineness is 205 mesh, Wood flour Raymond machine is levigate and sieves, and wood flour fineness is less than 1mm, and andalusite double-roll crusher is individually pulverized and enters ball mill Pulverizing powder also sieves, and andalusite fineness of powder is 86 mesh；
(2) batch mixing: use Secondary mixing, above-mentioned mixed-powder, wood flour and andalusite powder are together placed in blender, Mixing time is 2-3min for the first time, and rotating speed is 80-120r/min, is subsequently adding the water of 10%-12% and is allowed to be mixed into plastic Shape, mixing time is 4-5min for the second time, and rotating speed is 150-210r/min；
(3) ageing mixture: ageing mixture is carried out in ageing mixture storehouse, the ageing mixture time is 10h, and ageing mixture equipment uses reversible moving formula distributing device；
(4) sintering: firing temperature uses 1400-1600 DEG C；
(5) insulation: temperature retention time is 4-6h；
(6) molding: molding uses semi-hard plastic double-stage vacuum extruding machine, and briquetting pressure is 10MPa, a size of 240mm × 115mm × 90mm or 390mm × 190mm × 190mm；
(7) maintenance: at room temperature maintenance 48h.
A kind of gas generator refractory brick based on white mica the most according to claim 4, it is characterised in that: burn till temperature Degree uses 1450-1500 DEG C, and optimum temperature is 1500 DEG C.
CN201610307420.3A 2016-05-11 2016-05-11 Muscovite-based refractory brick for gas producer Pending CN105859271A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115286367A (en) * 2022-06-23 2022-11-04 江苏苏嘉集团新材料有限公司 Acid-resistant heat-insulating refractory brick

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102924104A (en) * 2012-11-23 2013-02-13 刘鹏 Refractory brick and fabricating method thereof
CN102992783A (en) * 2011-09-14 2013-03-27 中钢集团耐火材料有限公司 Corundum brick used for gas channel parts of bottle, can, glass kiln and combustion chamber of rangette
CN104072159A (en) * 2013-03-27 2014-10-01 开县顺意页岩砖厂 Preparing method of refractory brick
CN104446568A (en) * 2014-12-15 2015-03-25 山东鲁阳股份有限公司 Fireproof insulating brick and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102992783A (en) * 2011-09-14 2013-03-27 中钢集团耐火材料有限公司 Corundum brick used for gas channel parts of bottle, can, glass kiln and combustion chamber of rangette
CN102924104A (en) * 2012-11-23 2013-02-13 刘鹏 Refractory brick and fabricating method thereof
CN104072159A (en) * 2013-03-27 2014-10-01 开县顺意页岩砖厂 Preparing method of refractory brick
CN104446568A (en) * 2014-12-15 2015-03-25 山东鲁阳股份有限公司 Fireproof insulating brick and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115286367A (en) * 2022-06-23 2022-11-04 江苏苏嘉集团新材料有限公司 Acid-resistant heat-insulating refractory brick

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