CN110423101A - A kind of carbon-free spinel brick of micropore lower thermal conductivity novel composite environment-friendly and preparation method - Google Patents
A kind of carbon-free spinel brick of micropore lower thermal conductivity novel composite environment-friendly and preparation method Download PDFInfo
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- CN110423101A CN110423101A CN201910842840.5A CN201910842840A CN110423101A CN 110423101 A CN110423101 A CN 110423101A CN 201910842840 A CN201910842840 A CN 201910842840A CN 110423101 A CN110423101 A CN 110423101A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/02—Linings
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- 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
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- 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
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- 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)
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- 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
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- 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
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- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
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Abstract
The invention discloses a kind of carbon-free spinel bricks of micropore lower thermal conductivity NEW TYPE OF COMPOSITE and preparation method thereof, the carbon-free spinelle of NEW TYPE OF COMPOSITE includes the high temperature low-heat conducting shell as active face portion and the insulating as non-working surface part, carbon-free spinel brick is plane wedge type, the close non-working surface part of brick body is right angle Z-type bending part, the end face composite, insulating layer of Z-type bending part at right angle.Preparation method includes step A: the preparation of high temperature low-heat conducting shell, step B: insulating preparation, step C: compression moulding and brick bat drying can also include step D: the broached-tooth design of metal antiradiation thermal insulation board are pressed into insulating.The drying temperature of step C is 280-300 DEG C, drying time 12-16 hour.The carbon-free spinel brick of the present invention is while enhancing product performance, moreover it is possible to which improving production efficiency compared with low production cost and realizes environmentally friendly purpose, has good Social benefit and economic benefit.
Description
Technical field
The present invention relates to magnesia refractories technical fields, carbon-free more particularly to a kind of micropore lower thermal conductivity NEW TYPE OF COMPOSITE
Spinel brick and preparation method thereof.
Background technique
Magnesia carbon brick is with high-melting-point alkalinity oxides magnesium (2800 DEG C of fusing point) and the high-melting-point for being difficult to be infiltrated by clinker
Graphite material does not burn product containing carbon composite refractory as raw material made of resin-bonded, is widely used in various operating conditions
Ladle furnace on.Magnesia carbon brick has that good high temperature resistance, anti-slag ability be strong, good thermal shock.
There is the introducing that fatal weakness is exactly graphite, high thermal conductivity graphites to increase magnesia carbon brick thermal conductivity for magnesia carbon brick,
Liquid steel temperature is caused sharply to decline in use.Kiln declines in use in order to reduce liquid steel temperature, it is necessary to
Heat insulating refractory material is largely used, also will increase construction complexity and difficulty.On the one hand due to the thermal coefficient of magnesia carbon brick itself
Height, it is not highly desirable for leading to heat insulation effect.On the other hand, especially now with the steel grade of iron and steel enterprise be increasing and
Steel-making temperature constantly increases, and the requirement to molten steel temperature drop in smelting process is increasingly stringenter, and current magnesia carbon brick and heat preservation are resistance to
The cooperation of fiery material is difficult to meet the smelting requirements of steel mill.
Further more, magnesia carbon brick generally uses phenolic resin as bonding agent at present, cause in the production and use process, phenol
It is exceeded in the environment with formaldehyde, it not only causes damages to human body health, but also pollute environment.Especially resin is in use process
In will form reticular structure, generate short texture in applied at elevated temperature, influence the service life of magnesia carbon brick.
Summary of the invention
One of the technical problem to be solved in the present invention is to provide that a kind of thermal conductivity is low, intensity is high, the service life is long, energy-efficient etc.
A kind of novel carbon-free spinel brick of micropore lower thermal conductivity of feature；Another to be solved technical problem is to provide above-mentioned carbon-free point
The preparation method of spar brick.
A kind of carbon-free spinel brick of micropore lower thermal conductivity NEW TYPE OF COMPOSITE of the present invention the technical solution adopted is that: including as work
Make the high temperature low-heat conducting shell of face part and the insulating as non-working surface part, carbon-free spinel brick is plane wedge
Body, the close non-working surface part of brick body are right angle Z-type bending part, the end face composite, insulating layer of Z-type bending part at right angle.
The carbon-free spinel brick preferred embodiment of micropore lower thermal conductivity NEW TYPE OF COMPOSITE of the present invention is that the high temperature low-heat is led
Layer component content is that fused magnesite 10-15%, corundum 55-65%, spinelle 5-10%, aluminium oxide are hollow by weight percentage
One kind or mixture 5-10% of ball 5-10%, activated alumina Ultramicro-powder or the nano oxidized magnesium powder of highly pure active；As knot
Nano aluminum spinel powder 4-6%, lignosulfite 3-5% and the carboxyethyl cellulose of mixture, acetic acid cellulose formiate,
One or more 0.1-2% of hydroxypropyl methyl cellulose；Water-reducing agent calgon, dodecane sulfonic acid sodium, in long chain alkanol
One or more 0.1-0.3%.
The carbon-free spinel brick preferred embodiment of micropore lower thermal conductivity NEW TYPE OF COMPOSITE of the present invention is heat-insulation and heat-preservation layer component
Content is alumina 60-70%, spinelle 5-15% and alumina hollow ball, porous magnesia aggregate, work by weight percentage
One of property aluminium oxide Ultramicro-powder, titanium oxide powder, silicon dioxide powder or a variety of 15-25%；Nano aluminum point as bonding agent
Spar powder 4-6%, lignosulfite 3-5% and carboxyethyl cellulose, acetic acid cellulose formiate, hydroxypropyl methyl fiber
One or more 0.1-2% of element, one of water-reducing agent calgon, dodecane sulfonic acid sodium, long chain alkanol or a variety of
0.1-0.3%.
Further, the diameter of the working face alumina hollow ball is 0.2-0.5mm.
The carbon-free spinel brick preferred embodiment of micropore lower thermal conductivity NEW TYPE OF COMPOSITE of the present invention be further include setting every
The metal antiradiation thermal insulation board of hot insulating layer end face.
Further, the broached-tooth design of stretching is set on metal antiradiation thermal insulation board, and broached-tooth design is embedded into heat-insulation and heat-preservation
In layer.
Further, the angle between broached-tooth design and metal antiradiation thermal insulation board is 30-45 °.
A kind of technology that the preparation method such as the carbon-free spinel brick of micropore lower thermal conductivity NEW TYPE OF COMPOSITE uses of the present invention
Scheme is: including the following steps:
Step A: high temperature low-heat conducting shell preparation
A1. prepared by premix, by alumina hollow ball, activated alumina Ultramicro-powder or the nano oxidized magnesium powder of highly pure active
One kind or mixture, nano aluminum spinel powder, carboxyethyl cellulose, acetic acid cellulose formiate, hydroxypropyl methyl cellulose, six
One or more ingredients by weight percentage of sodium metaphosphate, dodecane sulfonic acid sodium, long chain alkanol, put into high speed premixing machine in into
It is spare after row premix stirring；
A2. fused magnesite be classified, by fused magnesite crushing and screening at granularity be 0.5-1mm, 0.088- < 0.5mm,
0.045- < 0.088mm three grades；Three grades fused magnesite accounts for the 30-35% of fused magnesite total weight, 35- respectively
40%, 30-35%；
A3. corundum is classified, by corundum crushing and screening at granularity at 5-8mm, 3- < 5mm, < 3mm three grades, three etc.
Grade corundum accounts for 30-40%, 35-45%, 25-35% of corundum total weight respectively；
A4. it is kneaded, corundum, fused magnesite and spinel particle material, part subdivision material is put into sand mixer and is mixed only first
3-8 minutes, premix is then added and mixes 5-8 minutes only, adds lignosulfite aqueous solution and is kneaded 20-40 minutes；
Step B: insulating preparation
B1. prepared by premix, by porous magnesia aggregate, activated alumina Ultramicro-powder, the nano oxidized magnesium powder of highly pure active
One of or a variety of, spinel powder, nano aluminum spinel powder, carboxyethyl cellulose, acetic acid cellulose formiate, hydroxypropyl methyl
One of cellulose, calgon, dodecane sulfonic acid sodium, long chain alkanol or a variety of ingredients by weight percentage, investment are high
It is spare that premix stirring is carried out in fast premixing machine；
B2. alumina hollow ball screens, and screens alumina hollow ball by diameter and is classified as > 0.2-0.5mm and 0.5-
Two ranks of 1mm, 50-60%, 40-50% of two rank alumina hollow ball difference Zhan total alumina hollow ball weight；
B3. alumina is classified, and is classified as 5-8mm, 3- < 5mm, < 3mm three grades, three ranks by particle filter alumina
Alumina accounts for the 30-35% of alumina total weight, 35-40%, 30-35% respectively；
B4. first alumina, alumina hollow ball, part subdivision material are put into sand mixer and are mixed only 3-8 minutes, is then added pre-
Mixing mixes 5-8 minutes only, adds lignosulfite aqueous solution and is kneaded 20-40 minutes；
Step C: compression moulding and brick bat drying
The pug being kneaded is respectively charged into the mold for being separated high temperature low-heat conducting shell and insulating with baffle, is suppressed
It is shaped to subscribe the adobe of size, then the adobe of compression moulding is put into dry kiln and is dried.
The carbon-free spinel brick preparation method preferred embodiment of micropore lower thermal conductivity NEW TYPE OF COMPOSITE of the present invention is to further include
Step D: the broached-tooth design of metal antiradiation thermal insulation board is pressed into insulating.
The carbon-free spinel brick preparation method preferred embodiment of micropore lower thermal conductivity NEW TYPE OF COMPOSITE of the present invention is step C
Drying temperature be 280-300 DEG C, drying time 12-16 hour.
Beneficial effects of the present invention:
1. not including graphite material in the raw material components of carbon-free spinel brick, thermal conductivity can be significantly reduced, is added simultaneously
Spinel can be improved refractoriness, and prolong the service life length.Alumina hollow ball is added, alumina hollow ball is in conduct
Micropore is formed in the high temperature low-heat conducting shell of active face portion and the insulating as non-working surface part, can further be dropped
The diameter of alumina hollow ball is especially to control in 0.2-0.5mm in the working face of brick by the thermal conductivity of low brick body, formation
Thermal conductivity can either be effectively reduced in micropore, additionally it is possible to brick body be made to keep high intensity and refractoriness.
2. being used since the carbon-free spinel brick of the present invention has relatively low thermal coefficient as lining material in the ladle
Shi Buzai needs plus outer layer thermal insulation material, can be improved construction efficiency, reduces thermal insulation material use cost.
3. without using resin as bonding agent in the raw material components of carbon-free spinel brick, with nano aluminum spinel powder, sulfurous
The materials such as sour spent pulping liquor 3-5% and carboxyethyl cellulose formed bonding agent, both reduced resinous material again high temperature when have
The discharge of noxious material and pollution on the environment also avoid the thermal coefficient liter further resulted in by the carbon of resin introducing
It is high.
4. carbon-free spinel brick of the invention makes the adjacent brick used form structure of grinding one's teeth using Z-type bending part, can guarantee
Brickwork joint fits closely, eliminate between layers through brickwork joint, improve the safety coefficient used.
5. carbon-free spinel brick of the invention is while enhancing product performance, moreover it is possible to which improving production efficiency lower is produced into
Originally it and realizes environmentally friendly purpose, there is good Social benefit and economic benefit.
Detailed description of the invention
Fig. 1 is the carbon-free spinel brick structural schematic diagram of one embodiment of the present invention；
Fig. 2 is the metal antiradiation thermal insulation board brick schematic diagram of the carbon-free spinelle of one embodiment of the present invention；
Fig. 3 is the broached-tooth design schematic diagram of metal antiradiation thermal insulation board.
1- high temperature low-heat conducting shell (working face), 2- heat-insulation and heat-preservation layered material (non-working surface), 3- antiradiation thermal insulation layer, 4- sawtooth
Structure, 5- metal antiradiation thermal insulation board
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Refering to Figure 1, the carbon-free spinel brick of micropore lower thermal conductivity NEW TYPE OF COMPOSITE includes the height as active face portion
Warm low-heat conducting shell 1 and insulating 2 as non-working surface part, high temperature low-heat conducting shell 1 are plane wedge body, high temperature low-heat
1 non-working surface part of conducting shell is right angle Z-type bending part, the end face composite, insulating layer 2 of Z-type bending part at right angle.Brick knot
Structure forms convex-concave profile in Z-type bending part of the high temperature low-heat conducting shell close to insulating non-working surface part, solves and is building
Brickwork joint in building runs through problem, and reduction air-flow directly passes through brickwork joint and reaches steel ladle, improves and build the safety that resistance to material uses.
High temperature low-heat conducting shell constituent content is fused magnesite 10-15%, corundum 55-65%, spinelle by weight percentage
5-10%, alumina hollow ball 5-10%, activated alumina Ultramicro-powder or the nano oxidized magnesium powder of highly pure active one kind or mixed
Close object 5-10%；Nano aluminum spinel powder 4-6%, lignosulfite 3-5% and carboxyethylcellulose as bonding agent
One or more 0.1-2% of element, acetic acid cellulose formiate, hydroxypropyl methyl cellulose；Water-reducing agent calgon, dodecane
One of sodium sulfonate, long chain alkanol or a variety of 0.1-0.3%.
The heat-insulated antiradiation heat insulation layer of insulating accumulation of heat, constituent content are alumina 60-70%, point by weight percentage
Spar 5-15% and alumina hollow ball, porous magnesia aggregate, activated alumina Ultramicro-powder, titanium oxide powder, silica
One of powder or a variety of 15-25%；As bonding agent nano aluminum spinel powder 4-6%, lignosulfite 3-5% with
And one or more 0.1-2% of carboxyethyl cellulose, acetic acid cellulose formiate, hydroxypropyl methyl cellulose；Water-reducing agent six is inclined
One of sodium phosphate, dodecane sulfonic acid sodium, long chain alkanol or a variety of 0.1-0.3%.
Thermal conductivity can either be effectively reduced in alumina hollow ball, additionally it is possible to brick body be made to keep high intensity and refractoriness.One
As selection commercial alumina in electric furnace melting blowing made of alumina hollow ball, crystal form a-Al2O3Microcrystal, highest
Using 1800 DEG C of temperature, products machinery intensity is high, is the several times of general light weight product, and bulk density is only the two of corundum products
/ mono-.Alumina hollow ball is introduced into carbon-free spinel brick, the thermal coefficient of refractory brick can not only be reduced, and aoxidize
Aluminium hollow sphere can form spinelle with nano active magnesia powder, moreover it is possible to improve refractoriness.
The technical indicator of alumina hollow ball: Al2O3% > 99%.
Magnesia and aluminium oxide in use through pyroreaction generate In-suit spinel have fusing point is high, intensity is good,
The excellent characteristics that high temperature resistant corrodes, but there is volume expansion during the reaction, up to 6-8% causes adobe coefficient of expansion mistake
Greatly, service life is influenced, and during introducing alumina hollow ball, hollow sphere forms point under the package of magnesia powder
Spar, and hollow position just give to be formed spinelle expansion leave room, by rational gradation composition ratio and additional amount, null position is simultaneously
It does not allow expansion to be filled up completely, and forms small airtight air vent, form micropore, not only increase the thermal shock resistance of product, and
And reduce product thermal conductivity.Meanwhile corundum and electric smelting sand activity do not have magnesia powder and alumina hollow ball, activated alumina
Powder is big, and reaction speed is slow, forms gradient reaction, equally also improves the thermal shock resistance of product, improve properties of product.
Traditional magnesia carbon brick thermal coefficient is up to 10-15W/m.k, and the product thermal coefficient substantially reduces, 0.9-1.5 it
Between.Service life is also improved largely, and applies on the ladle furnace of same operating condition, magnesia carbon brick using furnace life in 110-120 furnace,
And it is up to 150-180 times using the product furnace life.And ladle temperature drop is substantially reduced, and at 200-300 DEG C, temperature does not have casing temperature
It is widely varied, and the steel clad temperature of normal use magnesia carbon brick is higher at 350-450 DEG C, or even to latter temperature.
It please refers to shown in Fig. 2, Fig. 3, the carbon-free spinel brick of micropore lower thermal conductivity NEW TYPE OF COMPOSITE further includes being arranged in heat-insulated guarantor
The antiradiation thermal insulation layer 3 of warm 2 end face of layer, antiradiation thermal insulation layer 3 include metal antiradiation thermal insulation board 5, metal antiradiation thermal insulation board 5
The broached-tooth design 4 that upper setting is stretched out, broached-tooth design 4 are embedded into insulating 2, and broached-tooth design 4 and metal antiradiation are heat-insulated
Angle between plate 5 is 30-45 °, is embedded just below in insulating in forming process, i.e., securely and safe, is being suppressed
It is done directly in molding, it is convenient and efficient without the sticky object of any glue etc.
Insulating is the material component of the heat-insulated antiradiation heat insulation layer of accumulation of heat by alumina and contains inorganic non-metallic nanometer
Material, metal oxide or nonmetal oxide simultaneously add heat-insulated group of the metals antiradiation plates such as galvanized sheet in the heat-insulated position of back heat
At multi-layer heat preserving.
The preparation method of the carbon-free spinel brick of micropore lower thermal conductivity NEW TYPE OF COMPOSITE includes the following steps:
Step A: high temperature low-heat conducting shell preparation
A1. prepared by premix, by alumina hollow ball, activated alumina Ultramicro-powder or the nano oxidized magnesium powder of highly pure active
One kind or mixture, nano aluminum spinel powder, carboxyethyl cellulose, acetic acid cellulose formiate, hydroxypropyl methyl cellulose, six
Sodium metaphosphate, dodecane sulfonic acid sodium, long chain alkanol it is one or more after ingredient is checked the weight by weight percentage, investment high speed premixes
It is carried out in machine spare after premix stirring；
A2. fused magnesite be classified, by fused magnesite crushing and screening at granularity be 0.5-1mm, 0.088- < 0.5mm,
0.045- < 0.088mm three grades；Three grades fused magnesite accounts for the 30-35% of fused magnesite total weight, 35- respectively
40%, 30-35%；
A3. corundum is classified, by corundum crushing and screening at granularity at 5-8mm, 3- < 5mm, < 3mm three grades, three etc.
Grade corundum accounts for 30-40%, 35-45%, 25-35% of corundum total weight respectively；
A4. it is kneaded, corundum, fused magnesite and spinel particle material, part subdivision material is put into sand mixer and is mixed only first
3-8 minutes, then be added premix only mix 5-8 minute, add lignosulfite aqueous solution mixing 20-40 minutes, one
As mixing mixing carried out using circulating high speed mixing smelting machine；
Step B: insulating preparation
B1. prepared by premix, by porous magnesia aggregate, activated alumina Ultramicro-powder, the nano oxidized magnesium powder of highly pure active
One of or a variety of, spinel powder, nano aluminum spinel powder, carboxyethyl cellulose, acetic acid cellulose formiate, hydroxypropyl methyl
One of cellulose, calgon, dodecane sulfonic acid sodium, long chain alkanol are a variety of after ingredient is checked the weight by weight percentage,
It is spare that premix stirring is carried out in investment high speed premixing machine；
B2. alumina hollow ball screens, and screens alumina hollow ball by diameter and is classified as > 0.2-0.5mm and 0.5-
Two ranks of 1mm, 50-60%, 40-50% of two rank alumina hollow ball difference Zhan total alumina hollow ball weight；
B3. alumina is classified, and is classified as 5-8mm, 3- < 5mm, < 3mm three grades, three ranks by particle filter alumina
Alumina accounts for the 30-35% of alumina total weight, 35-40%, 30-35% respectively；
B4. first alumina, alumina hollow ball, part subdivision material are put into sand mixer and are mixed only 3-8 minutes, is then added pre-
Mixing mixes 5-8 minutes only, adds lignosulfite aqueous solution and is kneaded 20-40 minutes；
Group after high temperature low-heat conducting shell compression moulding can be made by carrying out grading to fused magnesite and corundum raw material in step A
Knit finer and close, raising mechanical strength and fire resistance.Grading is carried out to insulating to alumina raw in step B
It influences to be also in this way, being finally the mechanical strength and fire resistance for improving brick body.Using varigrained fused magnesite, corundum,
Alumina etc. can also significantly reduce apparent porosity by rational gradation composition.
Step C: compression moulding and brick bat drying
The pug being kneaded is respectively charged into the mold for being separated high temperature low-heat conducting shell and insulating with baffle, is suppressed
It is shaped to subscribe the adobe of size.It can also include step D, the broached-tooth design of metal antiradiation thermal insulation board is pressed into heat-insulated guarantor
In warm layer.The adobe of compression moulding is put into dry kiln again and is dried, drying temperature is 280-300 DEG C, drying time 12-
It is 16 hours, general using using the brick machine compression moulding of 630N semi-brake.
Embodiment 1
The carbon-free spinel brick of the lower thermal conductivity of an embodiment of the present invention is led including the high temperature low-heat as active face portion
Layer and insulating as non-working surface part, are arranged antiradiation thermal insulation layer in insulating end face, antiradiation is heat-insulated
Layer includes the metal antiradiation thermal insulation board for being provided with the broached-tooth design of stretching, and broached-tooth design is embedded into insulating, sawtooth
Angle between structure and metal antiradiation thermal insulation board is 30 °.
High temperature low-heat conducting shell constituent content is by weight percentage, fused magnesite 10%, corundum 65%, spinelle 5.8%,
0.2-0.5mm alumina hollow ball 5%, activated alumina Ultramicro-powder and highly pure active nano magnesia powder mixture 5%；As
Nano aluminum spinel powder 4%, lignosulfite 5% and the carboxyethyl cellulose 0.1% of bonding agent, the inclined phosphorus of water-reducing agent six
Sour sodium 0.05%, dodecane sulfonic acid sodium 0.05%.Wherein 0.5-1mm, 0.088- < 0.5mm, 0.045- < 0.088mm tri- etc.
Grade fused magnesite accounts for the 30% of fused magnesite total weight, 35%, 35% respectively；5-8mm, 3- < 5mm, < 3mm three grades are rigid
Jade accounts for 30%, 45%, the 25% of corundum total weight respectively.
Insulating constituent content is by weight percentage, alumina 70%, spinelle 5% and alumina hollow ball,
Porous magnesia aggregate and activated alumina Ultramicro-powder 15%；Nano aluminum spinel powder 5%, sulfite cellulose as bonding agent
Waste liquid 4.7% and carboxyethyl cellulose, acetic acid cellulose formiate, hydroxypropyl methyl cellulose, calgon, dodecane sulphur
One of sour sodium, long chain alkanol or a variety of 0.2%.Wherein > 0.2-0.5mm and 0.5-1mm, two rank aluminium oxide are hollow
Ball distinguishes 50%, the 50% of the total alumina hollow ball weight of Zhan；5-8mm, 3- < 5mm, < 3mm three grades alumina account for respectively
The 35% of alumina total weight, 35%, 30%.
Preparation method:
Step A: high temperature low-heat conducting shell preparation.A1. premix preparation, the classification of a2. fused magnesite, by the broken sieve of fused magnesite
It is divided into granularity for 0.5-1mm, 0.088- < 0.5mm, 0.045- < 0.088mm three grades, the classification of a3. corundum, corundum is broken
The broken granularity that is sieved into is kneaded at 5-8mm, 3- < 5mm, < 3mm three grades, a4., first by corundum, fused magnesite and spinelle
Particulate material, part subdivision material are put into sand mixer to be mixed 3 minutes only, and premix is then added and mixes 8 minutes only, adds sulfite paper
Pulp waste aqueous solution is kneaded 20 minutes, carries out mixing mixing using circulating high speed mixing smelting machine；
Step B: insulating preparation.B1. premix preparation, the screening of b2. alumina hollow ball, are screened by diameter and are aoxidized
Aluminium hollow sphere is simultaneously classified as two ranks of > 0.2-0.5mm and 0.5-1mm, the classification of b3. alumina, is classified as by particle filter alumina
Alumina, alumina hollow ball, part subdivision material are first put into sand mixer net by 5-8mm, 3- < 5mm, < 3mm three grades, b4.
It is 8 minutes mixed, premix is then added and mixes 5 minutes only, adds lignosulfite aqueous solution and is kneaded 40 minutes；
Step C: compression moulding and brick bat drying.The pug being kneaded is respectively charged into high temperature low-heat conducting shell with baffle and
The mold that insulating separates, compression moulding are to subscribe the adobe of size.
Step D: the broached-tooth design of metal antiradiation thermal insulation board is pressed into insulating；
The adobe of compression moulding is put into dry kiln again and is dried, drying temperature is 280 DEG C, and drying time 12 is small
When, using using the brick machine compression moulding of 630N semi-brake.The detection method that technical target of the product uses is: according to national standards
GB/T2997-2000 carries out apparent porosity, porosity of holding one's breath and bulk density to sample and detects；GB/ according to national standards
The permanent line variation of 1550 DEG C of heating of T5988-2007 test sample；GB/T3997.2-1998 detection examination according to national standards
The compressive resistance of sample；1000 DEG C of thermal coefficients of the cross line measurement sample in GB/T5990-2006 according to national standards；It presses
Sample refractoriness under load is measured according to standard GB/T/T5989-2008；Sample is cut into the straight brick sample of 230*114*65,
GB/T30873-2014 carries out 950 DEG C of water cooling test according to national standards, measures the thermal shock resistance of sample.Properties of product
Technical indicator refers to table 1.
Table 1: for the technical indicator of the carbon-free spinel brick of the present embodiment lower thermal conductivity
Embodiment 2
The carbon-free spinel brick of the lower thermal conductivity of an embodiment of the present invention, between broached-tooth design and metal antiradiation thermal insulation board
Angle be 45 °, other are same as Example 1.
High temperature low-heat conducting shell constituent content is by weight percentage, fused magnesite 15%, corundum 55%, spinelle 5%,
0.2-0.5mm alumina hollow ball 10%, activated alumina Ultramicro-powder and highly pure active nano magnesia powder mixture 5%；Make
For the nano aluminum spinel powder 5.9%, lignosulfite 3% and carboxyethyl cellulose 1% of bonding agent, dodecane sulfonic acid
Sodium 0.05%, long chain alkanol 0.05%.Wherein 0.5-1mm, 0.088- < 0.5mm, 0.045- < 0.088mm three grades electric smelting
Magnesia accounts for the 30% of fused magnesite total weight respectively, and 40%, 30%；5-8mm, 3- < 5mm, < 3mm three grades corundum difference
Account for 40%, 35%, the 25% of corundum total weight.
Insulating constituent content is by weight percentage, alumina 60%, spinelle 15% and alumina hollow ball,
Porous magnesia aggregate and activated alumina Ultramicro-powder 15.6%；Nano aluminum spinel powder 6%, sulfite paper as bonding agent
Pulp waste 3% and carboxyethyl cellulose, acetic acid cellulose formiate, one or more the 0.1% of hydroxypropyl methyl cellulose, six
Sodium metaphosphate, dodecane sulfonic acid sodium, alphanol 0.3%.Wherein > 0.2-0.5mm and 0.5-1mm, two rank oxygen
Change 50%, the 50% of the total alumina hollow ball weight of aluminium hollow sphere difference Zhan；5-8mm, 3- < 5mm, < 3mm three grades alum
Soil accounts for the 30% of alumina total weight, 40%, 30% respectively.
Preparation method:
Step A: high temperature low-heat conducting shell preparation.A1. premix preparation, the classification of a2. fused magnesite, by the broken sieve of fused magnesite
It is divided into granularity for 0.5-1mm, 0.088- < 0.5mm, 0.045- < 0.088mm three grades, the classification of a3. corundum, corundum is broken
The broken granularity that is sieved into is kneaded at 5-8mm, 3- < 5mm, < 3mm three grades, a4., first by corundum, fused magnesite and spinelle
Particulate material, part subdivision material are put into sand mixer to be mixed 8 minutes only, and premix is then added and mixes 5 minutes only, adds sulfite paper
Pulp waste aqueous solution is kneaded 40 minutes, carries out mixing mixing using circulating high speed mixing smelting machine；
Step B: insulating preparation.B1. premix preparation, the screening of b2. alumina hollow ball, are screened by diameter and are aoxidized
Aluminium hollow sphere is simultaneously classified as two ranks of > 0.2-0.5mm and 0.5-1mm, the classification of b3. alumina, is classified as by particle filter alumina
Alumina, alumina hollow ball, part subdivision material are first put into sand mixer net by 5-8mm, 3- < 5mm, < 3mm three grades, b4.
It is 3 minutes mixed, premix is then added and mixes 8 minutes only, adds lignosulfite aqueous solution and is kneaded 20 minutes；
Step C: compression moulding and brick bat drying.The pug being kneaded is respectively charged into high temperature low-heat conducting shell with baffle and
The mold that insulating separates, compression moulding are to subscribe the adobe of size；
Step D: the broached-tooth design of metal antiradiation thermal insulation board is pressed into insulating；
The adobe of compression moulding is put into dry kiln again and is dried, drying temperature is 300 DEG C, and drying time 16 is small
When, using using the brick machine compression moulding of 630N semi-brake.Technical target of the product detection method is same as Example 1.Product
Energy technical indicator refers to table 2.
Table 2: the technical indicator of the carbon-free spinel brick of the present embodiment lower thermal conductivity
Embodiment 3
The carbon-free spinel brick of the lower thermal conductivity of an embodiment of the present invention is led including the high temperature low-heat as active face portion
Layer and as non-working surface part insulating, insulating end face be arranged antiradiation thermal insulation layer.
High temperature low-heat conducting shell constituent content is by weight percentage, fused magnesite 12%, corundum 56%, spinelle 6%,
0.2-0.5mm alumina hollow ball 5.9%, activated alumina Ultramicro-powder and highly pure active nano magnesia powder mixture 10%；
As the nano aluminum spinel powder 5%, lignosulfite 3% and carboxyethyl cellulose 2% of bonding agent, calgon
0.1%.Three grades fused magnesite accounts for the ratio of fused magnesite total weight respectively and three grades corundum accounts for corundum gross weight respectively
The ratio of amount is same as Example 2.
Insulating constituent content is by weight percentage, alumina 60%, spinelle 5% and alumina hollow ball,
Porous magnesia aggregate and activated alumina Ultramicro-powder 25%；Nano aluminum spinel powder 4.8%, sulfite paper as bonding agent
Pulp waste 3% and carboxyethyl cellulose, acetic acid cellulose formiate, one or more the 2% of hydroxypropyl methyl cellulose, six are partially
Sodium phosphate, dodecane sulfonic acid sodium, alphanol 0.2%.Wherein > 0.2-0.5mm and 0.5-1mm, two rank oxidations
The ratio of Zhan total alumina hollow ball weight and three grades alumina account for the ratio of alumina total weight to aluminium hollow sphere respectively respectively
Example is same as Example 2.
Preparation method does not include step D, other are same as Example 2.Technical target of the product detection method and 1 phase of embodiment
Together.Properties of product technical indicator refers to table 3.
Table 3: the technical indicator of the carbon-free spinel brick of the present embodiment lower thermal conductivity
Embodiment 4
The carbon-free spinel brick of the lower thermal conductivity of an embodiment of the present invention, structure are same as Example 3.
High temperature low-heat conducting shell constituent content is by weight percentage, fused magnesite 10%, corundum 55%, spinelle 10%,
0.2-0.5mm alumina hollow ball 10%, activated alumina Ultramicro-powder and highly pure active nano magnesia powder mixture 6%；Make
For the nano aluminum spinel powder 5%, lignosulfite 3% and carboxyethyl cellulose 1%, calgon of bonding agent
0.1%.Three grades fused magnesite accounts for the ratio of fused magnesite total weight respectively and three grades corundum accounts for corundum gross weight respectively
The ratio of amount is same as Example 2.
Insulating constituent content is by weight percentage, alumina 62%, spinelle 8% and alumina hollow ball,
Porous magnesia aggregate and activated alumina Ultramicro-powder 20%；Nano aluminum spinel powder 4.9%, sulfite paper as bonding agent
Pulp waste 3% and carboxyethyl cellulose, acetic acid cellulose formiate, one or more the 2% of hydroxypropyl methyl cellulose, six are partially
Sodium phosphate, dodecane sulfonic acid sodium, alphanol 0.1%.Wherein > 0.2-0.5mm and 0.5-1mm, two rank oxidations
The ratio of Zhan total alumina hollow ball weight and three grades alumina account for the ratio of alumina total weight to aluminium hollow sphere respectively respectively
It is same as Example 2.
Preparation method is same as Example 3.Technical target of the product detection method is same as Example 1.Properties of product technology
Index refers to table 4.
Table 4: the technical indicator of the carbon-free spinel brick of the present embodiment lower thermal conductivity
Comparative example
Carbon-free spinel brick (Type B) and the every technical performance index of same specification magnesia carbon brick (MT10A) are compared, compared
As a result referring to table 5.
Table 5: carbon-free spinel brick (Type B) and magnesia carbon brick (MT10A) technical performance index compare
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (10)
1. a kind of carbon-free spinel brick of micropore lower thermal conductivity NEW TYPE OF COMPOSITE, including as active face portion high temperature low-heat conducting shell and
Insulating as non-working surface part, which is characterized in that carbon-free spinel brick is plane wedge body, brick body close to non-
Face is divided into right angle Z-type bending part, the end face composite, insulating layer of Z-type bending part at right angle.
2. compound carbon-free spinel brick according to claim 1, which is characterized in that the high temperature low-heat conducting shell constituent content
It is by weight percentage fused magnesite 10-15%, corundum 55-65%, spinelle 5-10%, alumina hollow ball 5-10%, work
One kind or mixture 5-10% of property aluminium oxide Ultramicro-powder or the nano oxidized magnesium powder of highly pure active；Nano aluminum as bonding agent
Spinel powder 4-6%, lignosulfite 3-5% and carboxyethyl cellulose, acetic acid cellulose formiate, hydroxypropyl methyl are fine
Tie up one or more 0.1-2% of element；One of water-reducing agent calgon, dodecane sulfonic acid sodium, long chain alkanol are a variety of
0.1-0.3%.
3. compound carbon-free spinel brick according to claim 1, which is characterized in that insulating constituent content is by weight
Percentage is that alumina 60-70%, spinelle 5-15% and alumina hollow ball, porous magnesia aggregate, activated alumina are super
One of micro mist, titanium oxide powder, silicon dioxide powder or a variety of 15-25%；Nano aluminum spinel powder 4- as bonding agent
6%, lignosulfite 3-5% and carboxyethyl cellulose, acetic acid cellulose formiate, hydroxypropyl methyl cellulose one kind
Or a variety of 0.1-2%；One of water-reducing agent calgon, dodecane sulfonic acid sodium, long chain alkanol or a variety of 0.1-0.3%.
4. compound carbon-free spinel brick according to claim 2 or 3, which is characterized in that the alumina hollow ball it is straight
Diameter is 0.2-0.5mm.
5. compound carbon-free spinel brick according to claim 1, which is characterized in that further include being arranged at insulating end
The metal antiradiation thermal insulation board in face.
6. compound carbon-free spinel brick according to claim 5, which is characterized in that be arranged on metal antiradiation thermal insulation board and stretch
Broached-tooth design out, broached-tooth design are embedded into insulating.
7. compound carbon-free spinel brick according to claim 6, which is characterized in that broached-tooth design and metal antiradiation are heat-insulated
Angle between plate is 30-45 °.
8. a kind of preparation side of the carbon-free spinel brick of micropore lower thermal conductivity NEW TYPE OF COMPOSITE as described in claim 1-4 any one
Method, which comprises the steps of:
Step A: high temperature low-heat conducting shell preparation
A1. prepared by premix, by the one of alumina hollow ball, activated alumina Ultramicro-powder or the nano oxidized magnesium powder of highly pure active
Kind or mixture, nano aluminum spinel powder, carboxyethyl cellulose, acetic acid cellulose formiate, hydroxypropyl methyl cellulose one kind
Or one of a variety of and water-reducing agent calgon, dodecane sulfonic acid sodium, long chain alkanol or a variety of match by weight percentage
Material is put into high speed premixing machine spare after carrying out premix stirring；
A2. fused magnesite be classified, by fused magnesite crushing and screening at granularity be 0.5-1mm, 0.088- < 0.5mm, 0.045- <
0.088mm three grades；Three grades fused magnesite accounts for the 30-35% of fused magnesite total weight, 35-40%, 30- respectively
35%；
A3. corundum is classified, and by corundum crushing and screening at granularity at 5-8mm, 3- < 5mm, < 3mm three grades, three grades is rigid
Jade accounts for 30-40%, 35-45%, 25-35% of corundum total weight respectively；
A4. it is kneaded, corundum, fused magnesite and spinel particle material, part subdivision material is put into sand mixer and mixes 3-8 points only first
Then clock is added premix and mixes 5-8 minutes only, adds lignosulfite aqueous solution and be kneaded 20-40 minutes；
Step B: insulating preparation
B1. prepared by premix, will be in porous magnesia aggregate, activated alumina Ultramicro-powder, the nano oxidized magnesium powder of highly pure active
One or more, spinel powder, nano aluminum spinel powder, carboxyethyl cellulose, acetic acid cellulose formiate, hydroxypropyl methyl fiber
One of element or one of a variety of and water-reducing agent calgon, dodecane sulfonic acid sodium, long chain alkanol are a variety of by weight
Percentage ingredient is measured, it is spare that premix stirring is carried out in investment horizontal high-speed premixing machine；
B2. alumina hollow ball screens, and screens alumina hollow ball by diameter and is classified as > 0.2-0.5mm and 0.5-1mm two
A rank, 50-60%, 40-50% of two rank alumina hollow ball difference Zhan total alumina hollow ball weight；
B3. alumina is classified, and is classified as 5-8mm, 3- < 5mm, < 3mm three grades, three rank alumina by particle filter alumina
The 30-35% of alumina total weight, 35-40%, 30-35% are accounted for respectively；
B4. alumina, alumina hollow ball, part subdivision material are put into sand mixer and are mixed only 3-8 minutes first, premix is then added
Material is net 5-8 minutes mixed, adds lignosulfite aqueous solution and is kneaded 20-40 minutes；
Step C: compression moulding and brick bat drying
The pug being kneaded is respectively charged into the mold for being separated high temperature low-heat conducting shell and insulating with baffle, compression moulding
For the adobe for subscribing size, then the adobe of compression moulding is put into dry kiln and is dried.
9. a kind of preparation method of the carbon-free spinel brick of NEW TYPE OF COMPOSITE as claimed in claim 8, which is characterized in that further include step
Rapid D: the broached-tooth design of metal antiradiation thermal insulation board is pressed into insulating.
10. a kind of preparation method of the carbon-free spinel brick of NEW TYPE OF COMPOSITE as claimed in claim 8 or 9, which is characterized in that step
The drying temperature of C is 280-300 DEG C, drying time 12-16 hour.
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