CN109851376A - A kind of bottom brick of molten tin bath and preparation method thereof is used to prepare the composition of bottom brick of molten tin bath - Google Patents
A kind of bottom brick of molten tin bath and preparation method thereof is used to prepare the composition of bottom brick of molten tin bath Download PDFInfo
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Abstract
The present invention relates to a kind of bottom brick of molten tin bath and preparation method thereof, it is used to prepare the composition of bottom brick of molten tin bath, belongs to technical field of refractory materials.Bottom brick of molten tin bath of the invention, is mainly prepared from the following raw materials in parts by weight: 50~70 parts of aggregate, 5~15 parts of pure calcium aluminate cement, 6~25 parts of high alumina fine powder, 4~12 parts of clay powder, 2~8 parts of mineralizer, 0.1~0.3 part of water-reducing agent；The aggregate is sial clinker.Bottom brick of molten tin bath of the invention has bulk density more appropriate and lower apparent porosity, there is lower thermal coefficient, low hydrogen diffusance, lower elasticity modulus and low linear expansion coefficient and higher refractoriness simultaneously, for having many advantages, such as no nephelinization, long service life when molten tin bath bottom, heat insulation effect is good simultaneously, heat loss is few, efficiency of heating- utilization can be significantly improved, realizing reduces energy consumption, energy saving purpose.
Description
Technical field
The present invention relates to a kind of bottom brick of molten tin bath and preparation method thereof, it is used to prepare the composition of bottom brick of molten tin bath, belongs to fire resisting
Field of material technology.
Background technique
Molten tin bath is the key that floatation glass production line Thermal Equipment.In float glass process, the glass metal that melts
Molten tin bath is successively flowed into through fluid passage, at a certain temperature, by the effect of surface tension and gravity, and in drive roller
Under traction, completes shakeout, polish on molten tin bath, opens up thin, float up.Therefore, the stability of the structure of molten tin bath restricts production
Continuity, and influence the yield and quality of glass.Bottom brick of molten tin bath is the key position of molten tin bath, it is desirable that used refractory material
With strong erosion resisting, high resistance to slag and good anti-H2Diffusivity, no foamed phenomenon, and require the outer dimension of bottom brick
It is very accurate, surface it is smooth it is straight, corner angle are complete, while requiring Fe in product2O3、K2O、Na2O content is lower, and apparent porosity is suitable
In, good thermal shock.
In the prior art, a kind of bottom brick of molten tin bath is disclosed in the Chinese invention patent that Authorization Notice No. is CN1269748C,
The bottom brick of molten tin bath is made of the composition of following parts by weight: the low aluminum fine powder 20~30 of 60~90 parts of sial clinker, 220~250 mesh
Part, greater than 0.05~0.2 part of 3~5 parts of 4~6 parts of 5~10 parts of silica brick powder, silicon powder, bonding agent, water-reducing agent, the water 5.0 of 250 mesh
~7.5 parts；Wherein low aluminum fine powder is any one of mullite powder, bauxite powder, flint clay powder；Bonding agent is high aluminum water
Mud；Water-reducing agent is sodium tripolyphosphate.The stomata of the base portion of the bottom brick of molten tin bath largely exists with sealed porosity, is not easy to be formed
Nepheline has been able to extend the service life of bottom brick of molten tin bath, but the thermal coefficient of the bottom brick of molten tin bath is higher, so that molten tin bath was using
There is a problem of that energy consumption is high, the thermal efficiency is low, energy-saving effect is poor in journey.
Summary of the invention
The present invention provides a kind of bottom brick of molten tin bath with compared with low thermal conductivity, can be improved thermal effect in molten tin bath use process
Rate, to reduce energy consumption and improve energy-saving effect.
The present invention also provides a kind of preparation methods of the bottom brick of molten tin bath of simple process.
The present invention also provides a kind of compositions for being used to prepare bottom brick of molten tin bath, can reduce the thermally conductive system of bottom brick of molten tin bath
Number.
In order to achieve the goal above, technical solution used by bottom brick of molten tin bath of the invention is:
A kind of bottom brick of molten tin bath, is mainly prepared from the following raw materials in parts by weight: 50~70 parts of aggregate, pure calcium aluminate cement 5
~15 parts, 6~25 parts of high alumina fine powder, 4~12 parts of clay powder, 2~8 parts of mineralizer, 0.1~0.3 part of water-reducing agent；The aggregate is
Sial clinker.
Bottom brick of molten tin bath of the invention, using sial clinker as aggregate, by adding pure calcium aluminate cement, high alumina fine powder, clay
Powder, mineralizer and water-reducing agent, each raw material rational allocation, synergistic effect, bottom brick of molten tin bath have bulk density appropriate and lower
Apparent porosity, while there is lower thermal coefficient, low hydrogen diffusance, lower elasticity modulus and low linear expansion coefficient, it uses
Have many advantages, such as no nephelinization, long service life when molten tin bath bottom；Heat insulation effect is good simultaneously, and heat loss is few, can significantly mention
High efficiency of heating- utilization, realizing reduces energy consumption, energy saving purpose.
Preferably, the raw material further includes 5~10 parts of silicon powder.In the feed using SILICA FUME can preparation (including
Maintenance) increase the intensity of material during bottom brick of molten tin bath, and the active SiO in silicon powder is realized in sintering process2With material
In Al2O3Reaction forms the good mullite phase of thermal shock resistance and improves the elevated temperature strength of bottom brick of molten tin bath, so that molten tin bath bottom
The elevated temperature strength and thermal shock resistance of brick are improved.In addition, the nanoscale SiO in silicon powder2Active particle (especially nanoscale
SiO2Active particle) and water generation hydration reaction formation Si-OH key, when so that green body is generated very high intensity, and being able to maintain longer
Between, after being able to maintain intensity to body drying when being prepared using conventional method.
Preferably, the bulk density of the sial clinker is 2.1~2.5g/cm3, apparent porosity is 0.65~10%.Control
Bulk density in sial clinker processed makes aggregate compare conventional aluminium silicon clinker specific gravity more with apparent porosity in above range
Lightly, apparent porosity is bigger, is conducive to the promotion of bottom brick of molten tin bath heating conduction, thermal shock resistance.In order to further increase molten tin bath
Heating conduction, the thermal shock resistance of bottom brick, it is preferred that the apparent porosity of the sial clinker is 2~10%.
Preferably, Al in the sial clinker2O3Mass fraction be 42~47%, Fe2O3Mass fraction be not more than
0.9%.Control Al in sial clinker2O3Mass fraction can be crossed in above range aggregate is made to compare conventional aluminium silicon clinker specific gravity
Gentlier, thermal coefficient is smaller, can further decrease the density and thermal coefficient of bottom brick of molten tin bath.
Preferably, the sial clinker is made by method comprising the following steps: by kaolin, clay, alumina powder and
Mineralizer add water mix after base, then conserve, dry, then 1600~1700 DEG C be burnt into, be crushed to get.Control firing
Temperature is more advantageous to form uniform mullite phase and quartzy phase at 1600~1700 DEG C, and keeps gas cell distribution more uniform.
Can be carried out in tunnel oven, shuttle kiln or down-draft kiln in 1600~1700 DEG C of firings, preferably in tunnel oven into
Row.Firing is carried out in tunnel oven can reduce energy consumption, and be heated evenly green body in sintering process.
Hydration reaction, shape occur for a calcium aluminate, Calcium dialuminate, calcium hexaluminate active particle and water in pure calcium aluminate cement
At Al-OH key, generate Al (OH)3Crystal makes green body generate very high intensity, and is able to maintain the long period, such as uses routine side
After being able to maintain intensity to body drying when prepared by method；And it is heated at high temperature during forming bottom brick of molten tin bath, has and live
Al in the CaO and substrate material of property2O3Pyroreaction occurs, forms high-strength calcium hexaluminate.Preferably, the pure calcium aluminate water
Al in mud2O3Mass fraction be not less than 80%.Al2O3Content it is high pure calcium aluminate cement performance it is more stable, more favorably in tin
More stable, higher intensity is provided in slot bottom brick preparation process for material.
Preferably, bottom brick of molten tin bath of the invention is mainly prepared from the following raw materials in parts by weight: 50~70 parts of aggregate, fine aluminium
5~15 parts of sour calcium cement, 6~25 parts of high alumina fine powder, 4~12 parts of clay powder, 2~8 parts of mineralizer, 0.1~0.3 part of water-reducing agent；
The aggregate is sial clinker；The mineralizer is selected from least one of kyanite, andalusite.
Preferably, bottom brick of molten tin bath of the invention is mainly prepared from the following raw materials in parts by weight: 50~70 parts of aggregate, fine aluminium
5~15 parts of sour calcium cement, 6~25 parts of high alumina fine powder, 4~12 parts of clay powder, 2~8 parts of mineralizer, 0.1~0.3 part of water-reducing agent；
The aggregate is sial clinker；The water-reducing agent in sodium tripolyphosphate, calgon, poly carboxylic acid series water reducer at least
It is a kind of.
Preferably, bottom brick of molten tin bath of the invention is mainly prepared from the following raw materials in parts by weight: 50~70 parts of aggregate, fine aluminium
5~15 parts of sour calcium cement, 6~25 parts of high alumina fine powder, 4~12 parts of clay powder, 2~8 parts of mineralizer, 0.1~0.3 part of water-reducing agent；
The aggregate is sial clinker；Small particle aggregate, partial size of the aggregate by partial size no more than 1mm are greater than 1mm and are not more than 3mm
Medium grain size aggregate and partial size be greater than 3mm and no more than 5mm large-particle-size aggregate form；The small particle aggregate, medium grain
The mass ratio of diameter aggregate and large-particle-size aggregate is 0.6~1.25:1:0.4~1.Material can be made using the aggregate of above-mentioned grain composition
The internal structure of material is more evenly.
Technical solution used by the preparation method of bottom brick of molten tin bath of the invention are as follows:
A kind of preparation method of above-mentioned bottom brick of molten tin bath, including base after taking each raw material of formula ratio that water is added to mix, then
Maintenance, drying, then 1400~1500 DEG C firing to get.
The preparation method of bottom brick of molten tin bath of the present invention, simple process can be produced, cost of investment using existing equipment
It is low, it is easy to be extended and applied.
It can be carried out in tunnel oven, shuttle kiln or down-draft kiln in 1400~1500 DEG C of firings.Preferably, 1400~
1500 DEG C of firings carry out in shuttle kiln.It is small that the not only temperature difference is burnt into shuttle kiln, but also low energy consumption, base in sintering process
Body, which is heated evenly, is not likely to produce crackle.
Of the invention is used to prepare technical solution used by the composition of bottom brick of molten tin bath are as follows:
A kind of composition being used to prepare bottom brick of molten tin bath, the component including following parts by weight: 50~70 parts of aggregate, fine aluminium
5~15 parts of sour calcium cement, 6~25 parts of high alumina fine powder, 4~12 parts of clay powder, 2~8 parts of mineralizer, 0.1~0.3 part of water-reducing agent；
The aggregate is sial clinker.
Using the bottom brick of molten tin bath made from the composition of bottom brick of molten tin bath that is used to prepare of the invention, bulk density with higher
With lower apparent porosity, while there is lower elasticity modulus and linear expansion coefficient and higher refractoriness.
Preferably, the composition for being used to prepare bottom brick of molten tin bath further includes 5~10 parts of silicon powder.It is prepared by silicon powder
The intensity of material can be increased during (including maintenance) bottom brick of molten tin bath, and form mullite in sintering process and improve molten tin bath
The elevated temperature strength and thermal shock resistance of bottom brick.
Specific embodiment
Bottom brick of molten tin bath provided by the invention, is mainly prepared from the following raw materials in parts by weight: 50~70 parts of aggregate, fine aluminium acid
5~15 parts of calcium cement, 6~25 parts of high alumina fine powder, 4~12 parts of clay powder, 2~8 parts of mineralizer, 0.1~0.3 part of water-reducing agent；Institute
Stating aggregate is sial clinker.
Preferably, the raw material further includes 5~10 parts of silicon powder.
Preferably, SiO in the silicon powder2Mass fraction be not less than 92%.Average grain diameter is less than 1 μm in silicon powder
The mass fraction of silicon powder is greater than 85%.It is further preferred that SiO in the silicon powder2Mass fraction be not less than 96%.Silicon
The mass fraction of silicon powder of the average grain diameter less than 1 μm is greater than 90% in micro mist.
Preferably, the total weight parts of the aggregate, pure calcium aluminate cement, silicon powder, high alumina fine powder, clay powder and mineralizer
Number is 100 parts.
Preferably, SiO in the aggregate2Weight percent be 44.9~53.1%.It is further preferred that the sial
SiO in clinker2Mass fraction be 48.5~53.1%.
Preferably, Fe in the sial clinker2O3Mass fraction≤0.9%.
Preferably, the water absorption rate of the aggregate is 0.1~2.4%.
Preferably, the partial size of the aggregate is 0.1~8mm.It is further preferred that the partial size of the aggregate be 0.1~
5mm。
Preferably, the specific surface area of the pure calcium aluminate cement is not less than 10000cm2/g.In the pure calcium aluminate cement
The mass fraction of CaO is 15~19%.Fe in the pure calcium aluminate cement2O3Mass fraction be not more than 0.5%.
Preferably, Al in the high alumina fine powder2O3Mass fraction be not less than 70%, Fe2O3Mass fraction be not more than
1.5%.Preferably, the fineness of the high alumina fine powder is not more than 250 mesh.
Preferably, Al in the clay powder2O3Mass fraction be not less than 35%, Fe2O3Mass fraction be not more than
1.5%.
Preferably, the fineness of the clay powder is not more than 320 mesh.
Preferably, the silicon powder, high alumina fine powder, clay powder, mineralizer are independently selected according to the specification requirement in table 1
It selects.
The specification requirement of table 1 silicon powder, high alumina fine powder, clay powder and mineralizer
Preferably, the sial clinker is made by method comprising the following steps: by kaolin, clay, alumina powder and
Mineralizer add water mix after base, then conserve, dry, then 1600~1700 DEG C be burnt into, be crushed to get.
Preferably, described to mix to be ground in the preparation method of sial clinker；It is ground the fineness of rear material not
Greater than 600 mesh.
Preferably, the time being burnt at 1600~1700 DEG C is 8~16h.
Preferably, the kaolinic parts by weight used when preparing sial clinker is 20~30 parts, the parts by weight of clay
Parts by weight for 50~70 parts, alumina powder are 5~10 parts and the parts by weight of mineralizer are 5~10 parts.Further preferably
, the total weight number of the kaolin, clay, alumina powder and the mineralizer that use when preparing sial clinker is 100 part.
Preferably, the mineralizer used when preparing sial clinker is selected from least one of kyanite, andalusite.
Preferably, Al in the kaolin used when preparing sial clinker2O3Mass fraction be not less than 40%, Fe2O3Matter
It measures score and is not more than 2.0%.Fe in the kaolin used when it is further preferred that preparing sial clinker2O3Mass fraction it is little
In 1.5%.Preferably, the kaolinic fineness used when preparing sial clinker is not more than 250 mesh.
Preferably, Al in the clay used when preparing sial clinker2O3Mass fraction be not less than 32%, Fe2O3Quality
Score is not more than 0.5%.Preferably, the fineness of the clay used when preparing sial clinker is not more than 250 mesh.
Preferably, the fineness of the alumina powder used when preparing sial clinker is not more than 120 mesh.
Preferably, when preparing sial clinker using kaolin, clay and mineralizer according to the specification requirement in table 2 it is independent into
Row selection.
The specification requirement of table 2 kaolin, clay and mineralizer
Preferably, the temperature dried in the preparation method of above-mentioned sial clinker is 100~120 DEG C.
The preparation method of bottom brick of molten tin bath provided by the invention, including base after taking each raw material of formula ratio that water is added to mix, so
Afterwards conserve, dry, then 1400~1500 DEG C firing to get.
Preferably, the time being burnt at 1400~1500 DEG C is 24~50h.
Preferably, tunnel oven, shuttle kiln or down-draft kiln, preferably shuttle kiln can be used in 1400~1500 DEG C of firings.
Preferably, the maintenance carried out after base is natural curing.The time of natural curing is 20~30h, preferably for 24 hours.
Preferably, the temperature that drying uses is carried out after base, maintenance as 100~120 DEG C, the time is 24~72h.
In the preparation method of above-mentioned bottom brick of molten tin bath, base includes vibration moulding after the material after mixing is poured, and obtains base
Body.
Provided by the present invention for preparing the composition of bottom brick of molten tin bath, the component including following parts by weight: aggregate 50~
70 parts, 5~15 parts of pure calcium aluminate cement, 6~25 parts of high alumina fine powder, 4~12 parts of clay powder, 2~8 parts of mineralizer, water-reducing agent 0.1
~0.3 part；The aggregate is sial clinker.
Preferably, the composition for being used to prepare bottom brick of molten tin bath further includes 5~10 parts of silicon powder.
Preferably, the total weight parts of the aggregate, pure calcium aluminate cement, silicon powder, high alumina fine powder, clay powder and mineralizer
Number is 100 parts.
In composition provided by the present invention for preparing bottom brick of molten tin bath, preferred aggregate, preferred pure calcium aluminate cement,
Preferred silicon powder, preferred high alumina fine powder, preferred clay powder, preferred mineralizer and preferred water-reducing agent are the same as molten tin bath bottom
The related content recorded in the technical solution of brick, repeats no more.
Below in conjunction with specific embodiment, further description of the technical solution of the present invention.
Examples 1 to 5 is to be used to prepare the embodiment of the composition of bottom brick of molten tin bath in following embodiment, embodiment 6~11
For the embodiment of bottom brick of molten tin bath, embodiment 12~14 is the embodiment of the preparation method of bottom brick of molten tin bath.
Embodiment 1
The composition for being used to prepare bottom brick of molten tin bath of the present embodiment, is composed of the following parts by weight: 60 parts of aggregate,
10 parts of pure calcium aluminate cement, 20 parts of high alumina fine powder, 8 parts of clay powder, 2 parts of mineralizer, 0.1 part of water-reducing agent；
Used aggregate is sial clinker, is included the following components'mass percentage: Al2O345.84%, SiO2
48.95%, Fe2O30.79%.The partial size of sial clinker is 0.1~5mm, bulk density 2.30g/cm3, apparent porosity is
5.66%, water absorption rate 2.35%, the sial clinker that wherein partial size is 0.1~1mm is 20 parts, partial size is greater than 1mm and is not more than
The sial clinker of 3mm is 20 parts, and it is 20 parts that partial size, which is greater than 3mm and the sial clinker no more than 5mm,；
The sial clinker is made using the method included the following steps: taking 25 parts by weight of kaolin fine powder, clay thin respectively
60 parts by weight of powder, 10 parts by weight of commercial alumina fine powder, 5 parts by weight of mineralizer are put into ball mill and 100 parts by weight are added
Water is homogenized mixing 20h, and the fineness of material is 600 mesh standard sieves full by, then filters pressing, extrusion forming system after homogenizing mixing
It is dried at green body, then by green body at 110 DEG C, is then placed in tunnel oven in 1650 DEG C of firing 12h, is crushed, then sieves, i.e.,
?；
Used mineralizer is andalusite, and water-reducing agent is sodium tripolyphosphate.
Embodiment 2
The composition for being used to prepare bottom brick of molten tin bath of the present embodiment, is composed of the following parts by weight: 60 parts of aggregate,
10 parts of pure calcium aluminate cement, 20 parts of high alumina fine powder, 8 parts of clay powder, 2 parts of mineralizer, 0.1 part of water-reducing agent；
Used aggregate is sial clinker, is included the following components'mass percentage: Al2O345.75%, SiO2
49.15%, Fe2O30.78%.The partial size of sial clinker is 0.1~5mm, bulk density 2.30g/cm3, apparent porosity is
4.25%, water absorption rate 2.1%, the sial clinker that wherein partial size is 0.1~1mm is 25 parts, partial size is greater than 1mm and is not more than
The sial clinker of 3mm is 20 parts, and it is 15 parts that partial size, which is greater than 3mm and the sial clinker no more than 5mm,；
The sial clinker is made using the method included the following steps: taking 20 parts by weight of kaolin fine powder, clay thin respectively
65 parts by weight of powder, 8 parts by weight of commercial alumina fine powder, 7 parts by weight of mineralizer are put into the water that 100 parts by weight in ball mill and are added
It is homogenized mixing 20h, the fineness of material is 600 mesh standard sieves full by then filters pressing, extrusion forming is made after homogenizing mixing
Green body, then green body is dried at 110 DEG C, is then placed in tunnel oven in 1650 DEG C of firings 12h, broken, then sieve to get；
Used mineralizer is kyanite, and water-reducing agent is sodium tripolyphosphate.
Embodiment 3
The composition for being used to prepare bottom brick of molten tin bath of the present embodiment, is composed of the following parts by weight: 60 parts of aggregate,
10 parts of pure calcium aluminate cement, 25 parts of high alumina fine powder, 3 parts of clay powder, 2 parts of mineralizer, 0.1 part of water-reducing agent；
Used aggregate is sial clinker, is included the following components'mass percentage: Al2O344.95%, SiO2
50.82%, Fe2O30.72%.The partial size of sial clinker is 0.1~5mm, bulk density 2.31g/cm3, apparent porosity is
5.75%, water absorption rate 2.40%, the sial clinker that wherein partial size is 0.1~1mm is 20 parts, partial size is greater than 1mm and is not more than
The sial clinker of 3mm is 20 parts, and it is 20 parts that partial size, which is greater than 3mm and the sial clinker no more than 5mm,；
The sial clinker is made using the method included the following steps: taking 20 parts by weight of kaolin fine powder, clay thin respectively
65 parts by weight of powder, 7 parts by weight of commercial alumina fine powder, 8 parts by weight of mineralizer are put into the water that 100 parts by weight in ball mill and are added
It is homogenized mixing 20h, the fineness of material is 600 mesh standard sieves full by then filters pressing, extrusion forming is made after homogenizing mixing
Green body, then green body is dried at 110 DEG C, is then placed in tunnel oven in 1650 DEG C of firings 12h, broken, then sieve to get；
Used mineralizer is andalusite, and water-reducing agent is poly carboxylic acid series water reducer.
Embodiment 4
The composition for being used to prepare bottom brick of molten tin bath of the present embodiment, is composed of the following parts by weight: 50 parts of aggregate,
15 parts of pure calcium aluminate cement, 5 parts of silicon powder, 14.7 parts of high alumina fine powder, 12 parts of clay powder, 8 parts of mineralizer, 0.3 part of water-reducing agent；
Used aggregate is sial clinker, is included the following components'mass percentage: Al2O347.0%, SiO2
48.62%, Fe2O30.9%.The partial size of sial clinker is 0.1~5mm, bulk density 2.45g/cm3, apparent porosity is
1.82%, water absorption rate 0.65%, the sial clinker that wherein partial size is 0.1~1mm is 15 parts, partial size is greater than 1mm and is not more than
The sial clinker of 3mm is 25 parts, and it is 10 parts that partial size, which is greater than 3mm and the sial clinker no more than 5mm,；
The sial clinker is made using the method included the following steps: taking 30 parts by weight of kaolin fine powder, clay thin respectively
50 parts by weight of powder, 10 parts by weight of commercial alumina fine powder, 10 parts by weight of mineralizer are put into ball mill and 100 parts by weight are added
Water is homogenized mixing 20h, and the fineness of material is 600 mesh standard sieves full by, then filters pressing, extrusion forming system after homogenizing mixing
It is dried at green body, then by green body at 100 DEG C, is then placed in tunnel oven in 1600 DEG C of firing 16h, is crushed, then sieves, i.e.,
?；
Used mineralizer is kyanite, and water-reducing agent is poly carboxylic acid series water reducer.
Embodiment 5
The composition for being used to prepare bottom brick of molten tin bath of the present embodiment, is composed of the following parts by weight: 70 parts of aggregate,
5 parts of pure calcium aluminate cement, 10 parts of silicon powder, 6 parts of high alumina fine powder, 4 parts of clay powder, 5 parts of mineralizer, 0.2 part of water-reducing agent；
Used aggregate is sial clinker, is included the following components'mass percentage: Al2O342.0%, SiO2
53.06%, Fe2O30.8%.The partial size of sial clinker is 0.1~5mm, bulk density 2.5g/cm3, apparent porosity is
0.68%, water absorption rate 0.1%, the sial clinker that wherein partial size is 0.1~1mm is 18 parts, partial size is greater than 1mm and is not more than
The sial clinker of 3mm is 30 parts, and it is 22 parts that partial size, which is greater than 3mm and the sial clinker no more than 5mm,；
The sial clinker is made using the method included the following steps: taking 20 parts by weight of kaolin fine powder, clay thin respectively
70 parts by weight of powder, 5 parts by weight of commercial alumina fine powder, 5 parts by weight of mineralizer are put into the water that 100 parts by weight in ball mill and are added
It is homogenized mixing 20h, the fineness of material is 600 mesh standard sieves full by then filters pressing, extrusion forming is made after homogenizing mixing
Green body, then green body is dried at 120 DEG C, is then placed in tunnel oven in 1700 DEG C of firings 8h, broken, then sieve to get；
Used mineralizer is andalusite, and water-reducing agent is calgon.
Al in pure calcium aluminate cement employed in above-described embodiment 1~52O3Mass percent not less than 80%, CaO
Mass percent is 15~19%, Fe2O3Mass fraction be 0.1~0.5%, specific surface area >=10000cm2/g.The silicon of use
The mass fraction > 90% of silicon powder of the micro mist average grain diameter less than 1 μm.Used fineness is 320 mesh.Kaolin fine powder
Fineness is 250 mesh；The fineness of well as clay fines is 250 mesh.Al in the commercial alumina fine powder of use2O3Mass fraction be not less than
98.5%, Fe2O3Mass fraction be not more than 0.5%, fineness be 120 mesh.The chemical composition of the raw material specifically used is shown in Table 3.
The specification requirement of the raw material used in 3 Examples 1 to 5 of table
Embodiment 6
The bottom brick of molten tin bath of the present embodiment, mainly using the composition for being used to prepare bottom brick of molten tin bath in embodiment 1 as raw material system
At.
Embodiment 7
The bottom brick of molten tin bath of the present embodiment, mainly using the composition for being used to prepare bottom brick of molten tin bath in embodiment 2 as raw material system
At.
Embodiment 8
The bottom brick of molten tin bath of the present embodiment, mainly using the composition for being used to prepare bottom brick of molten tin bath in embodiment 3 as raw material system
At.
Embodiment 9
The bottom brick of molten tin bath of the present embodiment, mainly using the composition for being used to prepare bottom brick of molten tin bath in embodiment 4 as raw material system
At.
Embodiment 10
The bottom brick of molten tin bath of the present embodiment, mainly using the composition for being used to prepare bottom brick of molten tin bath in embodiment 5 as raw material system
At.
Embodiment 11
The bottom brick of molten tin bath of the present embodiment, the difference with the bottom brick of molten tin bath of embodiment 6 are only that: used sial clinker is
After natural gangue block is crushed after 1400 DEG C are fired for 24 hours, sieve.
Bottom brick of molten tin bath in embodiment 6~11 can be prepared using the preparation method in embodiment 12~14.
Embodiment 12
The preparation method of the bottom brick of molten tin bath of the present embodiment, comprising the following steps: take each raw material of formula ratio, it is total that raw material is added
The water of quality 10% stirs and evenly mixs, and casting, vibration moulding obtain green body；Then by after green body natural curing for 24 hours again at 110 DEG C
72h is dried, is then placed in 1450 DEG C of firing 45h in shuttle kiln, then cut, polished, is packed.
Embodiment 13
The preparation method of the bottom brick of molten tin bath of the present embodiment, comprising the following steps: take each raw material of formula ratio, it is total that raw material is added
The water of quality 5% stirs and evenly mixs, and casting, vibration moulding obtain green body；Then it will be dried again at 100 DEG C after green body natural curing for 24 hours
Dry 36h, is then placed in 1400 DEG C of firing 50h in shuttle kiln, then cut, polished, and packs.
Embodiment 14
The preparation method of the bottom brick of molten tin bath of the present embodiment, comprising the following steps: take each raw material of formula ratio, it is total that raw material is added
The water of quality 15% stirs and evenly mixs, and casting, vibration moulding obtain green body；Then by after green body natural curing for 24 hours again at 120 DEG C
Drying for 24 hours, is then placed in shuttle kiln and fires for 24 hours for 1450 DEG C, then cut, polished, pack.
Comparative example
The bottom brick of molten tin bath of this comparative example is prepared from the following raw materials in parts by weight: 60 parts of aggregate, 12 parts of high alumina cement, high alumina
18 parts of fine powder, 9 parts of clay powder, 1 part of mineralizer, 0.2 part of water-reducing agent；
Used aggregate is sial clinker；It includes the following components'mass percentage: Al2O351.06%, SiO2
43.46%, Fe2O30.85%.The partial size of sial clinker is 0.1~5mm, bulk density 2.61g/cm3, apparent porosity is
1.26%, water absorption rate 0.55%, the sial clinker that wherein partial size is 0.1~1mm is 20 parts, partial size is greater than 1mm and is not more than
The sial clinker of 3mm is 20 parts, and it is 20 parts that partial size, which is greater than 3mm and the sial clinker no more than 5mm,；
Used sial clinker is after being crushed natural gangue block after 1400 DEG C are fired for 24 hours, to sieve
It arrives；
Al in used high alumina cement2O3Mass percent >=50%, SiO2Mass percent 5~10%.
Used high alumina fine powder, clay powder, mineralizer and water-reducing agent are the same as embodiment 1.
The preparation method of the bottom brick of molten tin bath of this comparative example, comprising the following steps: take each raw material of formula ratio, it is total that raw material is added
The water of quality 10% stirs and evenly mixs, and casting, vibration moulding obtain green body；Then by after green body natural curing for 24 hours again at 110 DEG C
72h is dried, 1450 DEG C of firing 45h in shuttle kiln are then placed in, then cuts, polish, packaging.
Experimental example
The performance of the bottom brick of molten tin bath in embodiment 6~10 and comparative example is tested respectively, the results are shown in Table 4.
The performance test results of 4 embodiment 6~10 of table and the bottom brick of molten tin bath in comparative example
By the test result in table 4 it is found that bottom brick of molten tin bath of the invention has low lead compared to the bottom brick of molten tin bath of comparative example
The advantages that heat, low elastic modulus and low hydrogen diffusance.Due to Na in glass metal in float glass process2O penetrates into tin
In slot bottom brick, with Al2O3And SiO2Reaction generates nepheline (Na2O·Al2O3·2SiO2) and it is swollen with 20% or so volume
Swollen and bottom brick surface is made to generate bulging, peel off, the impurity of peeling is floated in glass, seriously affects the quality of glass.Low hydrogen expands
The bottom brick of molten tin bath of divergence can then prevent the generation of this phenomenon completely, so that Na in glass metal2O can not penetrate into the bottom brick
In.The bottom brick of molten tin bath of the embodiment of the present invention 6~10 is after using two kiln phases (16 years) all without discovery surface nephelinization
Phenomenon substantially prolongs the service life of bottom brick of molten tin bath.In addition, bottom brick of molten tin bath of the invention can also improve the heat preservation effect of molten tin bath
Fruit reduces heat loss, so that efficiency of heating- utilization is significantly improved, it is energy saving, greatly reduce energy consumption.
Claims (10)
1. a kind of bottom brick of molten tin bath, it is characterised in that: be mainly prepared from the following raw materials in parts by weight: 50~70 parts of aggregate, fine aluminium
5~15 parts of sour calcium cement, 6~25 parts of high alumina fine powder, 4~12 parts of clay powder, 2~8 parts of mineralizer, 0.1~0.3 part of water-reducing agent；
The aggregate is sial clinker.
2. bottom brick of molten tin bath according to claim 1, it is characterised in that: the raw material further includes 5~10 parts of silicon powder.
3. bottom brick of molten tin bath according to claim 1, it is characterised in that: the bulk density of the sial clinker be 2.1~
2.5g/cm3, apparent porosity is 0.65~10%.
4. bottom brick of molten tin bath according to claim 3, it is characterised in that: the apparent porosity of the sial clinker is 2~10%.
5. bottom brick of molten tin bath described according to claim 1~any one of 4, it is characterised in that: Al in the sial clinker2O3
Mass fraction be 42~47%, Fe2O3Mass fraction be not more than 0.9%.
6. bottom brick of molten tin bath described according to claim 1~any one of 4, it is characterised in that: the sial clinker is by including
The method of following steps is made: base after adding water to mix kaolin, clay, alumina powder and mineralizer, then conserves, dries
It is dry, then be burnt at 1600~1700 DEG C, be crushed to get.
7. bottom brick of molten tin bath according to claim 1, it is characterised in that: Al in the pure calcium aluminate cement2O3Mass fraction
Not less than 80%.
8. a kind of preparation method of bottom brick of molten tin bath as described in claim 1, it is characterised in that: each raw material including taking formula ratio
Add water mix after base, then conserve, dry, then 1400~1500 DEG C firing to get.
9. the preparation method of bottom brick of molten tin bath according to claim 8, it is characterised in that: in 1400~1500 DEG C of firings in shuttle
It is carried out in formula kiln.
10. a kind of composition for being used to prepare bottom brick of molten tin bath, it is characterised in that: the component including following parts by weight: aggregate 50
~70 parts, 5~15 parts of pure calcium aluminate cement, 6~25 parts of high alumina fine powder, 4~12 parts of clay powder, 2~8 parts of mineralizer, water-reducing agent
0.1~0.3 part；The aggregate is sial clinker.
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| CN114249577A (en) * | 2020-09-23 | 2022-03-29 | 河南中原特种耐火材料有限公司 | Aggregate for clay insulating brick and preparation method thereof, clay insulating brick and preparation method thereof |
| CN114249596A (en) * | 2020-09-23 | 2022-03-29 | 河南中原特种耐火材料有限公司 | Semi-light clay brick for glass melting furnace pool bottom cushion layer and preparation method thereof |
| CN115819098A (en) * | 2022-12-21 | 2023-03-21 | 焦作市金星耐火材料有限公司 | Heat-insulating refractory brick and preparation method thereof |
| CN116751068A (en) * | 2023-08-18 | 2023-09-15 | 山东淄博沈淄耐火材料有限公司 | Method for preparing isostatic pressing forming calcium-tin aluminate bottom bricks |
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| CN101768006A (en) * | 2010-01-13 | 2010-07-07 | 新密市中原特种耐火材料有限公司 | Lightweight refractory for glass smelting kiln |
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| CN114249577A (en) * | 2020-09-23 | 2022-03-29 | 河南中原特种耐火材料有限公司 | Aggregate for clay insulating brick and preparation method thereof, clay insulating brick and preparation method thereof |
| CN114249596A (en) * | 2020-09-23 | 2022-03-29 | 河南中原特种耐火材料有限公司 | Semi-light clay brick for glass melting furnace pool bottom cushion layer and preparation method thereof |
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| CN115819098A (en) * | 2022-12-21 | 2023-03-21 | 焦作市金星耐火材料有限公司 | Heat-insulating refractory brick and preparation method thereof |
| CN116751068A (en) * | 2023-08-18 | 2023-09-15 | 山东淄博沈淄耐火材料有限公司 | Method for preparing isostatic pressing forming calcium-tin aluminate bottom bricks |
| CN116751068B (en) * | 2023-08-18 | 2023-10-31 | 山东淄博沈淄耐火材料有限公司 | Method for preparing isostatic pressing forming calcium-tin aluminate bottom bricks |
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