CN108002851A - Refractory brick containing mullite and preparation method thereof - Google Patents

Refractory brick containing mullite and preparation method thereof Download PDF

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Publication number
CN108002851A
CN108002851A CN201610958632.8A CN201610958632A CN108002851A CN 108002851 A CN108002851 A CN 108002851A CN 201610958632 A CN201610958632 A CN 201610958632A CN 108002851 A CN108002851 A CN 108002851A
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refractory brick
mullite
containing mullite
magnesia
adobe
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张微微
计富宝
吉飞虎
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Henan World Intellectual Property Operation Co Ltd
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Henan World Intellectual Property Operation Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/44Shaped 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 aluminates
    • C04B35/443Magnesium aluminate spinel
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/6303Inorganic additives
    • C04B35/6306Binders based on phosphoric acids or phosphates
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/6303Inorganic additives
    • C04B35/6316Binders based on silicon compounds
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/66Monolithic refractories or refractory mortars, including those whether or not containing clay
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/08Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
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    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3206Magnesium oxides or oxide-forming salts thereof
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    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
    • C04B2235/3222Aluminates other than alumino-silicates, e.g. spinel (MgAl2O4)
    • CCHEMISTRY; METALLURGY
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    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3427Silicates other than clay, e.g. water glass
    • C04B2235/3463Alumino-silicates other than clay, e.g. mullite

Abstract

The present invention provides a kind of refractory brick containing mullite, it includes the raw material of following mass percents:Magnesium aluminate spinel bulky grain 20%~30%, calcium hexaluminate little particle 12%~24%, andalusite fines 19%~27%, mullite miropowder 10%~26.5%, magnesia 10%~15%, magnesia sintering aid 0.5%~2%, composite anti-penetrating agent 3%~8%, compound binding agent 3.5%~7%, surplus are pulp-water.The refractory brick component collocation containing mullite is reasonable, has higher corrosion resistance, good dimensional stability and higher refractoriness under load.The present invention also provides a kind of preparation method of the above-mentioned refractory brick containing mullite, this method step is simple, is easy to industrialized production.

Description

Refractory brick containing mullite and preparation method thereof
Technical field
The invention belongs to technical field of refractory materials, specifically, relate to a kind of refractory brick and its system containing mullite Preparation Method.
Background technology
Refractory material is due to the corrosion resistance good to high-temperature medium, and the performance with insulation, it is metallurgical, The high temperature industry such as petrochemical industry, glass is widely used.As energy-saving attention degree is continuously improved in China, there is good protect The lightweight refracrory of warm heat insulation has obtained more research and developments.Unshape refractory due to construction just Profit, production cost are low, and the advantage such as overall structure is good of liner body, and receive special attention, wherein being poured especially with fire resisting Material feeding is applied the most extensive.
Existing refractory brick is mostly cement insulating fire brick, clay brick mainly by mullite, glass phase and cristobalite and Quartz is formed.Usually using hard paste as raw material, advance mature calcined material, is then equipped with mild-clay, with semidry method or can Modeling method is molded, and temperature burns till clay tile product at 1300 DEG C~1400 DEG C.The bonding agents such as a small amount of waterglass, cement can also be added Not burned product and unsetting material is made.Also this refractory brick service life is short, non-reusable.It is further, since traditional Pore size is larger in refractory aggregate, and aperture is in grade more, so when the material in hot environment in use, due to logical The aggravation of gas radiation heat transfer and convection current heat transfer, can raise the thermal conductivity factor of refractory material, thereby reduce resistance in air passing hole The heat insulation and preservation effect of fiery material, increases the loss of thermal energy, causes the rising of energy cost.
In order to solve the problems, such as present on, people are seeking a kind of preferable technical solution always.
The content of the invention
The purpose of the present invention is in view of the deficiencies of the prior art, thus provide it is a kind of have higher refractoriness under load, Refractory brick containing mullite of higher corrosion resistance and preparation method thereof.
To achieve these goals, the technical solution adopted in the present invention is:A kind of refractory brick containing mullite, it includes The raw material of following mass percents:Magnesium aluminate spinel bulky grain 20%~30%, calcium hexaluminate little particle 12%~24%, andalusite are thin Material 19%~27%, mullite miropowder 10%~26.5%, magnesia 10%~15%, magnesia sintering aid 0.5%~2%, composite anti-penetrating agent 3% ~8%, compound binding agent 3.5%~7%, surplus are pulp-water.
Based on above-mentioned, the refractory brick containing mullite, it includes the raw material of following mass percents:Magnesium aluminate spinel is big Particle 24%~27.3%, calcium hexaluminate little particle 13%~21%, andalusite fines 20%~25.5%, mullite miropowder 13%~ 23.6%th, magnesia 13%~14%, magnesia sintering aid 1%~2%, composite anti-penetrating agent 4.5%~7%, compound binding agent 4%~6%, surplus For pulp-water.
Based on above-mentioned, the compound binding agent is by mass ratio(2~3):1 phosphate aqueous solution and silica sol group Into.
Based on above-mentioned, the composite anti-penetrating agent is by mass ratio(3~4):1:3 nano strontium carbonate, nanometer strontium sulfate and Nano barium sulfate forms.
Based on above-mentioned, the magnesia sintering aid is attaclay or magnesium chloride hexahydrate.
Based on above-mentioned, the granularity of the magnesium aluminate spinel bulky grain is the mm of 3 mm~4;The calcium hexaluminate is short grained Granularity is the mm of 1 mm~2.
Based on above-mentioned, the granularity of the andalusite fines is less than 0.074 mm, the granularity of the magnesia is less than 0.074 mm; The granularity of the mullite miropowder is less than 0.043 mm.
The present invention also provides a kind of preparation method of the refractory brick containing mullite, comprise the following steps:
(1)Calculated according to the raw material of above-mentioned mass percent, by magnesium aluminate spinel bulky grain, calcium hexaluminate little particle, andalusite Fines, magnesia and pulp-water carry out mixed grind and prefabricated pug are made;Then mullite miropowder, magnesia is added into the prefabricated pug Sintering aid, composite anti-penetrating agent and compound binding agent simultaneously carry out mixed grind mixed grind pug are made;
(2)The mixed grind pug is pressed into adobe, the refractory brick containing mullite is made in the adobe after drying and calcining.
Based on above-mentioned, the step(2)Including:The mixed grind pug is pressed into using the pressure of the MPa of 50 MPa~90 Adobe, and by the adobe spontaneously dry 18 it is small when be placed in dry kiln, dry 24 is small at a temperature of 100 DEG C~150 DEG C When~30 it is small when;Then by the dried adobe carried out at a temperature of 1200 DEG C~1330 DEG C calcining 10 it is small when~it is 15 small When, so that the refractory brick containing mullite be made.
The present invention has prominent substantive distinguishing features and significant progress compared with the prior art, specifically, the present invention with Magnesium aluminate spinel bulky grain is skeleton raw material, using calcium hexaluminate little particle, andalusite fines, mullite miropowder, magnesia as auxiliary material, Under the action of magnesia sintering aid, composite anti-penetrating agent and compound binding agent, above-mentioned auxiliary material filling out in the skeleton raw material is realized Fill, so that the mixed grind pug be made.The adobe being pressed into by the mixed grind pug is in high-temperature sintering process, because in raw material Including the calcium hexaluminate little particle with loose structure, can to produce in a short time inside the adobe a large amount of small Stomata, and the Minute pores will not with the progress of sintering process agglomeration, finally in the product formed micron order and The stomata of even distribution.Therefore, by the reasonably combined so as to ensure that the refractory brick containing magnesium aluminate spinel has of raw material Good dimensional stability.
At the same time in high-temperature sintering process, the part iron species contained in raw material can be from the magnesium aluminate spinel bulky grain Precipitation comes out, and counterdiffusion is produced with the magnesia on periphery, sutures the gap of each raw material to improving the fire resisting containing mullite The mechanical property of brick is highly beneficial, has not only improved its elevated temperature strength but also has reduced its firing temperature, and therefore, the point containing magnalium is brilliant The refractory brick of stone has higher surface erosion resistance and higher refractoriness under load.
The present invention also provides a kind of preparation method of the above-mentioned refractory brick containing magnesium aluminate spinel, it is by the way that above-mentioned raw materials are mixed Conjunction forms mixed grind pug, and the adobe, is then sintered by the repressed formation adobe of mixed grind pug under the high temperature conditions So as to which the refractory brick containing magnesium aluminate spinel be made, this method step is simple, is easy to industrialized production.
Embodiment
Below by embodiment, technical scheme is described in further detail.
Embodiment 1
The present embodiment provides a kind of refractory brick containing mullite, it includes the raw material of following mass percents:Magnesium aluminate spinel is big Particle 30%, calcium hexaluminate little particle 12%, andalusite fines 19%, mullite miropowder 10%, magnesia 10%, magnesium chloride hexahydrate 0.5%, Composite anti-penetrating agent 3%, compound binding agent 3.5%, pulp-water 12%.
Wherein, the compound binding agent is 2 by mass ratio:1 phosphate aqueous solution and silica sol composition;It is described multiple It is 3 that permeability-reducing admixture, which is closed, by mass ratio:1:3 nano strontium carbonate, nanometer strontium sulfate and nano barium sulfate composition.The magnesium aluminate spinel The granularity of bulky grain is the mm of 3 mm~4, the short grained granularity of the calcium hexaluminate is the mm of 1 mm~2, the andalusite fines Granularity be less than 0.074 mm, the magnesia granularity be less than 0.074 mm, the mullite miropowder granularity be less than 0.043 mm.Chemical composition in each raw material is as shown in table 1.
Table 1, each raw material main chemical compositions
The present embodiment also provides a kind of preparation method of the refractory brick containing mullite, and specific preparation process includes:
(1)Calculated according to the raw material of above-mentioned mass percent, by magnesium aluminate spinel bulky grain, calcium hexaluminate little particle, andalusite Fines, magnesia and pulp-water carry out mixed grind and prefabricated pug are made;Then mullite miropowder, six water are added into the prefabricated pug Magnesium chloride, composite anti-penetrating agent and compound binding agent simultaneously carry out mixed grind mixed grind pug are made;
(2)The mixed grind pug is pressed into by adobe under the pressure of 90 MPa using brickmaking machine, and by the adobe in nature Drying 18 is placed in dry kiln when small, when drying 30 is small under 150 DEG C of temperature conditionss;Then by the dried adobe Carried out at a temperature of 1300 DEG C calcining 15 it is small when, so that the refractory brick containing mullite be made.
Embodiment 2
The present embodiment provides a kind of refractory brick containing mullite, it includes the raw material of following mass percents:Magnesium aluminate spinel is big It is particle 27%, calcium hexaluminate little particle 13%, andalusite fines 20%, mullite miropowder 13%, magnesia 13%, magnesium chloride hexahydrate 1%, multiple Close permeability-reducing admixture 5%, compound binding agent 4%, pulp-water 4%.Wherein, the compound binding agent is 3 by mass ratio:1 phosphate is water-soluble Liquid and silica sol composition;The composite anti-penetrating agent is 4 by mass ratio:1:3 nano strontium carbonate, nanometer strontium sulfate and nanometer Barium sulfate forms.The granularity of the magnesium aluminate spinel bulky grain is the mm of 3 mm~4, the short grained granularity of the calcium hexaluminate is 1 The mm of mm~2, the andalusite fines granularity less than 0.074 mm, the magnesia granularity less than 0.074 mm, described do not come The granularity of stone micro mist is less than 0.043 mm.
The preparation method of the refractory brick containing mullite described in the present embodiment and the substantially phase of the preparation method in embodiment 1 Together, difference is:
The step(2)The mixed grind pug is pressed into by adobe under the pressure of 80 MPa using brickmaking machine, and by the brick Base natural drying 18 is placed in dry kiln when small, when drying 24 is small at a temperature of 100 DEG C;Then by the dried brick Base carried out at a temperature of 1330 DEG C calcining 10 it is small when, so that the refractory brick containing mullite be made.
Embodiment 3
The present embodiment provides a kind of refractory brick containing mullite, it includes the raw material of following mass percents:Magnesium aluminate spinel is big It is particle 25%, calcium hexaluminate little particle 15%, andalusite fines 19%, mullite miropowder 13%, magnesia 10%, attaclay 1%, compound Permeability-reducing admixture 3%, compound binding agent 4%, pulp-water 10%.Wherein, the compound binding agent is 2 by mass ratio:1 phosphate is water-soluble Liquid and silica sol composition;The composite anti-penetrating agent is 4 by mass ratio:1:3 nano strontium carbonate, nanometer strontium sulfate and nanometer Barium sulfate forms.The granularity of the magnesium aluminate spinel bulky grain is the mm of 3 mm~4, the short grained granularity of the calcium hexaluminate is 1 The mm of mm~2, the andalusite fines granularity less than 0.074 mm, the magnesia granularity less than 0.074 mm, described do not come The granularity of stone micro mist is less than 0.043 mm.
The preparation method of the refractory brick containing mullite described in the present embodiment is identical with the preparation method in embodiment 1.
Refractory brick performance detection containing mullite
The resistance to pressure of Air permenbility, bulk density, refractoriness, room temperature of the refractory brick containing mullite prepared respectively to embodiment 1~3 Degree and 1350 DEG C of high temperature break resistant intensity performances are detected, and testing result is as shown in table 2, and wherein air permeability test condition is:It is resistance to Firebrick area 2 × 10-3m2, gas pressure 0.3MPa.
Table 2, the refractory brick performance detection containing mullite
As can be seen from the above table:Embodiment 1~3 provide the refractory brick containing mullite fire resisting softening point be more than 1700 DEG C, Cold crushing strength is more than 90MPa, flexural strength is more than 20MPa, bulk density is more than 2.5g/cm3, Air permenbility be less than 0.6m3/ H, therefore the refractory brick property indices containing mullite meet GB/T3994-2013 set quotas, while the product There is higher surface erosion resistance and higher refractoriness under load.
Finally it should be noted that:The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof;To the greatest extent The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that:Still It can modify to the embodiment of the present invention or equivalent substitution is carried out to some technical characteristics;Without departing from this hair The spirit of bright technical solution, it should all cover among the claimed technical solution scope of the present invention.

Claims (10)

1. a kind of refractory brick containing mullite, it is characterised in that it includes the raw material of following mass percents:Magnesium aluminate spinel is big Particle 20%~30%, calcium hexaluminate little particle 12%~24%, andalusite fines 19%~27%, mullite miropowder 10%~26.5%, Magnesia 10%~15%, magnesia sintering aid 0.5%~2%, composite anti-penetrating agent 3%~8%, compound binding agent 3.5%~7%, surplus are paper Pulp-water.
2. the refractory brick according to claim 1 containing mullite, it is characterised in that it includes the original of following mass percents Material:Magnesium aluminate spinel bulky grain 24%~27.3%, calcium hexaluminate little particle 13%~21%, andalusite fines 20%~25.5%, not Come stone micro mist 13%~23.6%, magnesia 13%~14%, magnesia sintering aid 1%~2%, composite anti-penetrating agent 4.5%~7%, compoiste adhering Agent 4%~6%, surplus are pulp-water.
3. the refractory brick according to claim 1 or 2 containing mullite, it is characterised in that the compound binding agent is by quality Than for(2~3):1 phosphate aqueous solution and silica sol composition.
4. the refractory brick according to claim 3 containing mullite, it is characterised in that the composite anti-penetrating agent is by mass ratio (3~4):1:3 nano strontium carbonate, nanometer strontium sulfate and nano barium sulfate composition.
5. the refractory brick according to claim 4 containing mullite, it is characterised in that the magnesia sintering aid is attaclay Or magnesium chloride hexahydrate.
6. the refractory brick according to claim 5 containing mullite, it is characterised in that the grain of the magnesium aluminate spinel bulky grain Spend for the mm of 3 mm~4.
7. the refractory brick according to claim 6 containing mullite, it is characterised in that the short grained granularity of calcium hexaluminate For the mm of 1 mm~2.
8. the refractory brick according to claim 7 containing mullite, it is characterised in that the granularity of the andalusite fines is less than 0.074 mm, the granularity of the magnesia are less than 0.074 mm;The granularity of the mullite miropowder is less than 0.043 mm.
9. a kind of preparation method of the refractory brick containing mullite, comprises the following steps:
(1)Raw material according to any one of claim 1~8 mass percent calculates, by magnesium aluminate spinel bulky grain, six aluminium Sour calcium little particle, andalusite fines, magnesia and pulp-water carry out mixed grind and prefabricated pug are made;Then add into the prefabricated pug Enter mullite miropowder, magnesia sintering aid, composite anti-penetrating agent and compound binding agent and carry out mixed grind and mixed grind pug is made;
(2)The mixed grind pug is pressed into adobe, the refractory brick containing mullite is made in the adobe after drying and calcining.
10. the preparation method of the refractory brick according to claim 9 containing mullite, it is characterised in that the step(2)Bag Include:The mixed grind pug is pressed into by adobe using the pressure of the MPa of 50 MPa~90, and it is small that the adobe is spontaneously dried 18 When be placed in dry kiln, at a temperature of 100 DEG C~150 DEG C it is dry 24 it is small when~30 it is small when;Then will be dried described Adobe carried out at a temperature of 1200 DEG C~1330 DEG C calcining 10 it is small when~15 it is small when, so that the fire resisting containing mullite be made Brick.
CN201610958632.8A 2016-10-28 2016-10-28 Refractory brick containing mullite and preparation method thereof Withdrawn CN108002851A (en)

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CN108997026A (en) * 2018-09-19 2018-12-14 山东潍耐节能材料有限公司 A kind of strong lightweight thermal insulation brick of roaster superelevation and preparation method thereof
CN109437936A (en) * 2018-12-26 2019-03-08 武汉如星科技有限公司 A kind of prefabricated insulating brick of moulding by casting ladle
CN110790579A (en) * 2019-12-04 2020-02-14 冷水江市鑫达耐火材料制造有限公司 Chromium-free refractory brick and preparation method thereof

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