CN106083095A - A kind of silicious checker brick used for hot-blast furnace gravity flow castable and preparation method thereof - Google Patents
A kind of silicious checker brick used for hot-blast furnace gravity flow castable and preparation method thereof Download PDFInfo
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- CN106083095A CN106083095A CN201610476563.7A CN201610476563A CN106083095A CN 106083095 A CN106083095 A CN 106083095A CN 201610476563 A CN201610476563 A CN 201610476563A CN 106083095 A CN106083095 A CN 106083095A
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- checker brick
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
Abstract
Present invention relates particularly to a kind of silicious checker brick used for hot-blast furnace gravity flow castable and preparation method thereof.Its technical scheme is: with Silicon stone, the silicon powder of 1 ~ 10wt%, the portland cement of 1 ~ 5wt%, the mineralizer of 1 ~ 3wt%, the polycarboxylic acids of 0.1 ~ 0.3wt% and 0.05 ~ 0.35wt% Nano-meter SiO_2 of 85 ~ 95wt%2For raw material, first polycarboxylic acids is dissolved in the water accounting for described raw material 5 ~ 10wt% by described raw material and content thereof, obtains the premix of polycarboxylic acids and water；By the raw material mix homogeneously in addition to polycarboxylic acids, obtain premix；Then above-mentioned premix is mixed with premix, stir, obtain silicious checker brick used for hot-blast furnace gravity flow castable.The present invention has that technique is simple, percent defective is low and the feature of low cost, and in prepared silicious checker brick used for hot-blast furnace gravity flow castable, high-temperature behavior is excellent, normal temperature strength is big, refractoriness under load is high, volume stability is good and service life is long.
Description
Technical field
The invention belongs to siliceous gravity flow castable technical field.It is specifically related to a kind of silicious checker brick used for hot-blast furnace gravity flow
Formula castable material and preparation method thereof.
Background technology
Along with the progress of Modern Ironmaking Process, blast furnace develops, in the world to maximization, long service life and high-efficiency low energy consumption direction
Steel and iron industry developed country has been achieved with blast furnace maximization, efficient and automatization.And at existing more than the 1370 seat height stoves of China
In, more than 1000m3The blast furnace of volume there are about 227, added 36 than 2009.4000m3More than volume super-huge blast furnace is about
20, account for Century Square 000m3About the 40% of the above blast furnace of volume.Domestic iron and steel production capacity problem requires that air stove is to high pathogenic wind-warm, longevity
Life, Low investment and the development in high-efficiency low energy consumption direction, the furnace type structure of air stove continues to optimize progress.Top combustion stove is weight
The developing direction wanted, has obtained extensive attention and application.
Regenerative hot blast stove used by modern blast furnace is the thermoconverter of a kind of heat exchange type, is first with gas-fired, heating
Checker brick therein, then cause air flow through the checker brick of high temperature so that it is after Bei Jiare, send into blast furnace and use.Due to checker brick originally
The structure of body is complex, common are 7 holes, 19 holes or 37 hole checker brick, therefore during compressing, position, corner
Pug is difficult to fill, and is susceptible to slabbing and vacancy.And large hydraulic press is relatively costly, add the money of medium-sized and small enterprises
Gold pressure.
Summary of the invention
It is contemplated that overcome prior art defect, it is therefore an objective to provide that a kind of technique is simple, percent defective is low and low cost
The preparation method of silicious checker brick used for hot-blast furnace gravity flow castable material, prepares silicious checker brick used for hot-blast furnace gravity flow by the method
In formula castable, high-temperature behavior is excellent, normal temperature strength is big, refractoriness under load is high, volume stability is good and service life is long.
For achieving the above object, the technical solution used in the present invention is: described siliceous checker brick gravity flow castable former
Expect and content is: the Silicon stone after pre-burning is 85 ~ 95wt%, silicon powder is 1 ~ 10wt%, portland cement is 1 ~ 5wt%, mineralizer
Be 1 ~ 3wt%, polycarboxylic acids is for for 0.1 ~ 0.3wt% and Nano-meter SiO_22It is 0.05 ~ 0.35wt%.
The preparation method of described siliceous checker brick gravity flow castable is: by above-mentioned raw materials and content thereof, first by polycarboxylic acids
It is dissolved in the water accounting for described raw material 5 ~ 10wt%, obtains premix, then by remaining the raw material mix homogeneously in addition to polycarboxylic acids,
To premix；Then described premix is mixed with described premix, stir, obtain the siliceous grid of air stove
Brick gravity flow castable.
Silicon stone after described pre-burning is that Silicon stone is incubated under the conditions of calcined temperature is 1100 ~ 1300 DEG C 4 ~ 5h, obtains pre-
Silicon stone after burning；The SiO of the Silicon stone after pre-burning2Content >=98wt%；The grain composition of the Silicon stone after pre-burning is: particle diameter is less than 5mm
And account for raw material 7 ~ 10wt% more than or equal to 3mm, particle diameter accounts for raw material 28 ~ 30wt% less than 3mm more than or equal to 1mm, particle diameter less than 1mm and
Accounting for raw material 23 ~ 25wt% more than or equal to 0.088mm, particle diameter accounts for raw material 27 ~ 30wt% less than 0.088mm.
The SiO of described silicon powder2Content >=95wt%；Particle diameter≤0.6 μm of described silicon powder.
The main chemical compositions of described portland cement is: SiO2Content is 18 ~ 22wt%, and CaO content is 50 ~ 55wt%；
Particle diameter≤the 0.088mm of described portland cement.
Described mineralizer is Fe2O3And MnO2Mixture；Fe2O3And MnO2Mass ratio be 1: 0.9 ~ 1.
Described Nano-meter SiO_22SiO2Content >=99.5%；Described Nano-meter SiO_22Particle diameter≤30nm.
Owing to using technique scheme, the present invention compared with prior art has a following good effect:
Silicious checker brick used for hot-blast furnace gravity flow castable prepared by the present invention can be flow automatically molding, is sufficient filling with checker brick mould
Each position, it is to avoid the fault of construction of checker brick.
Silicon stone after the pre-burning that the present invention uses be Silicon stone is incubated under the conditions of calcined temperature is 1100 ~ 1300 DEG C 4 ~
5h, obtains the Silicon stone after pre-burning, and the Silicon stone after pre-burning has micro-crack to produce, and structure becomes loose, and has a certain amount of metastable
State cristobalite generates mutually with glass.Silicon stone energy premature inflation after pre-burning, can reduce silicious checker brick used for hot-blast furnace gravity flow
The internal stress that castable produces in sintering process, the metastable state cristobalite changed in advance may advantageously facilitate the life of tridymite ore deposit phase
Become, and micro-crack can effectively suppress further expanding of crackle, reaches the effect of microcrack evolution equation.The siliceous grid of air stove
The physical properties of brick gravity flow castable is improved significantly.
Present invention introduces a small amount of Nano-meter SiO_22Siliceous castable, burn till under weak oxide atmosphere, because of Nano-meter SiO_22Size
Little, surface atom number is big, thus surface can be high, has high activity, extremely unstable, it is easy to be combined with other atoms, its
Fusing point and sintering temperature are more much lower than conventional powder.Nano-meter SiO_22Silicious checker brick used for hot-blast furnace gravity flow castable can be promoted
Sintering, improve further its properties.
Silicious checker brick used for hot-blast furnace gravity flow castable prepared by the present invention is through gravity flow pouring molding, room temperature maintenance 24
~ 30 hours, the demoulding, baking 24 ~ 30 hours under the conditions of 100 ~ 120 DEG C, after testing: silicious checker brick used for hot-blast furnace gravity flow is poured into a mould
Material from flow valuve be 30 ~ 145%；After the lower 1400 DEG C × 8h of weak oxide atmosphere burns, rupture strength is 5.5 ~ 11MPa；Weak oxide atmosphere
After lower 1400 DEG C × 8h burns, compressive resistance is 75 ~ 120MPa；After the lower 1400 DEG C × 8h of weak oxide atmosphere burns, refractoriness under load is
1635~1655℃。
Therefore, the present invention has that technique is simple, percent defective is low and the feature of low cost, the siliceous lattice of prepared air stove
In sub-brick gravity flow castable, high-temperature behavior is excellent, normal temperature strength is big, refractoriness under load is high, volume stability is good and uses the longevity
Life is long.
Detailed description of the invention
Below in conjunction with detailed description of the invention, this detailed description of the invention is further described, not to its protection domain
Limit.
For avoiding repeating, the raw material Unify legislation first this detailed description of the invention used is as follows, the most superfluous in embodiment
State:
The SiO of the Silicon stone after described pre-burning2Content >=98wt%；The grain composition of the Silicon stone after pre-burning is: particle diameter less than 5mm and
Accounting for raw material 7 ~ 10wt% more than or equal to 3mm, particle diameter accounts for raw material 28 ~ 30wt% less than 3mm more than or equal to 1mm, and particle diameter is less than 1mm and big
In accounting for raw material 23 ~ 25wt% equal to 0.088mm, particle diameter accounts for raw material 27 ~ 30wt% less than 0.088mm.
The SiO of described silicon powder2Content >=95wt%；Particle diameter≤0.6 μm of described silicon powder.
The main chemical compositions of described portland cement is: SiO2Content is 18 ~ 22wt%, and CaO content is 50 ~ 55wt%；
Particle diameter≤the 0.088mm of described portland cement.
Described mineralizer is Fe2O3And MnO2Mixture；Fe2O3And MnO2Mass ratio be 1: 0.9 ~ 1.
Described Nano-meter SiO_22SiO2Content >=99.5%；Described Nano-meter SiO_22Particle diameter≤30nm.
Embodiment 1
A kind of silicious checker brick used for hot-blast furnace gravity flow castable and preparation method thereof.Described siliceous checker brick gravity flow castable
Raw material and content be: the Silicon stone after pre-burning is 85 ~ 90wt%, silicon powder is 4 ~ 10wt%, portland cement is 3 ~ 5wt%, ore deposit
Agent is 2 ~ 3wt%, polycarboxylic acids is 0.1 ~ 0.2wt% and Nano-meter SiO_22It is 0.05 ~ 0.15wt%.
The preparation method of described siliceous checker brick gravity flow castable is: by above-mentioned raw materials and content thereof, first by polycarboxylic acids
It is dissolved in the water accounting for described raw material 5 ~ 10wt%, obtains premix, then by remaining the raw material mix homogeneously in addition to polycarboxylic acids,
To premix；Then described premix is mixed with described premix, stir, obtain the siliceous grid of air stove
Brick gravity flow castable.
Silicon stone after pre-burning described in the present embodiment be Silicon stone is incubated under the conditions of calcined temperature is 1100 ~ 1200 DEG C 4 ~
5h, obtains the Silicon stone after pre-burning.
Silicious checker brick used for hot-blast furnace gravity flow castable prepared by the present embodiment is through gravity flow pouring molding, room temperature maintenance
24 ~ 30 hours, the demoulding, baking 24 ~ 30 hours under the conditions of 100 ~ 120 DEG C, after testing: silicious checker brick used for hot-blast furnace gravity flow waters
Material feeding from flow valuve be 110 ~ 145%；After the lower 1400 DEG C × 8h of weak oxide atmosphere burns, rupture strength is 5.5 ~ 6MPa；Weak oxide gas
After the lower 1400 DEG C × 8h of atmosphere burns, compressive resistance is 75 ~ 80MPa；Refractoriness under load after weak oxide atmosphere lower 1400 DEG C × 8h burning
(T0.6, 0.2MPa) and it is 1640 ~ 1645oC。
Embodiment 2
A kind of silicious checker brick used for hot-blast furnace gravity flow castable and preparation method thereof.Described siliceous checker brick gravity flow castable
Raw material and content be: the Silicon stone after pre-burning is 87 ~ 92wt%, silicon powder is 3 ~ 9wt%, portland cement is 2 ~ 4wt%, ore deposit
Agent is 2 ~ 3wt%, polycarboxylic acids is 0.2 ~ 0.3wt% and Nano-meter SiO_22It is 0.15 ~ 0.25wt%.
The preparation method of described siliceous checker brick gravity flow castable is: by above-mentioned raw materials and content thereof, first by polycarboxylic acids
It is dissolved in the water accounting for described raw material 5 ~ 10wt%, obtains premix, then by remaining the raw material mix homogeneously in addition to polycarboxylic acids,
To premix；Then described premix is mixed with described premix, stir, obtain the siliceous grid of air stove
Brick gravity flow castable.
Silicon stone after pre-burning described in the present embodiment be Silicon stone is incubated under the conditions of calcined temperature is 1100 ~ 1200 DEG C 4 ~
5h, obtains the Silicon stone after pre-burning.
Silicious checker brick used for hot-blast furnace gravity flow castable prepared by the present embodiment is through gravity flow pouring molding, room temperature maintenance
24 ~ 30 hours, the demoulding, baking 24 ~ 30 hours under the conditions of 100 ~ 120 DEG C, after testing: silicious checker brick used for hot-blast furnace gravity flow waters
Material feeding from flow valuve be 85 ~ 115%；Under weak oxide atmosphere 1400oAfter C × 8h burns, rupture strength is 7 ~ 9MPa；Under weak oxide atmosphere
After 1400 DEG C × 8h burns, compressive resistance is 105 ~ 120MPa；Refractoriness under load after weak oxide atmosphere lower 1400 DEG C × 8h burning
(T0.6, 0.2MPa) and it is 1635 ~ 1650 DEG C.
Embodiment 3
A kind of silicious checker brick used for hot-blast furnace gravity flow castable and preparation method thereof.Described siliceous checker brick gravity flow castable
Raw material and content be: the Silicon stone after pre-burning is 89 ~ 94wt%, silicon powder is 2 ~ 7wt%, portland cement is 1 ~ 3wt%, ore deposit
Agent is 1 ~ 2wt%, polycarboxylic acids is 0.1 ~ 0.2wt% and Nano-meter SiO_22It is 0.25 ~ 0.35wt%.
The preparation method of described siliceous checker brick gravity flow castable is: by above-mentioned raw materials and content thereof, first by polycarboxylic acids
It is dissolved in the water accounting for described raw material 5 ~ 10wt%, obtains premix, then by remaining the raw material mix homogeneously in addition to polycarboxylic acids,
To premix；Then described premix is mixed with described premix, stir, obtain the siliceous grid of air stove
Brick gravity flow castable.
Silicon stone after pre-burning described in the present embodiment be Silicon stone is incubated under the conditions of calcined temperature is 1100 ~ 1200 DEG C 4 ~
5h, obtains the Silicon stone after pre-burning.
Silicious checker brick used for hot-blast furnace gravity flow castable prepared by the present embodiment is through gravity flow pouring molding, room temperature maintenance
24 ~ 30 hours, the demoulding, baking 24 ~ 30 hours under the conditions of 100 ~ 120 DEG C, after testing: silicious checker brick used for hot-blast furnace gravity flow waters
Material feeding from flow valuve be 30 ~ 85%；After the lower 1400 DEG C × 8h of weak oxide atmosphere burns, rupture strength is 6 ~ 7.5MPa；Weak oxide atmosphere
After lower 1400 DEG C × 8h burns, compressive resistance is 100 ~ 105MPa；Refractoriness under load after weak oxide atmosphere lower 1400 DEG C × 8h burning
(T0.6, 0.2MPa) and it is 1635 ~ 1645 DEG C.
Embodiment 4
A kind of silicious checker brick used for hot-blast furnace gravity flow castable and preparation method thereof.Described siliceous checker brick gravity flow castable
Raw material and content be: the Silicon stone after pre-burning is 90 ~ 95wt%, silicon powder is 1 ~ 6wt%, portland cement is 1 ~ 2wt%, ore deposit
Agent is 1 ~ 2wt%, polycarboxylic acids is 0.2 ~ 0.3wt% and Nano-meter SiO_22It is 0.05 ~ 0.15wt%.
The preparation method of described siliceous checker brick gravity flow castable is: by above-mentioned raw materials and content thereof, first by polycarboxylic acids
It is dissolved in the water accounting for described raw material 5 ~ 10wt%, obtains premix, then by remaining the raw material mix homogeneously in addition to polycarboxylic acids,
To premix；Then described premix is mixed with described premix, stir, obtain the siliceous grid of air stove
Brick gravity flow castable.
Silicon stone after pre-burning described in the present embodiment be Silicon stone is incubated under the conditions of calcined temperature is 1100 ~ 1200 DEG C 4 ~
5h, obtains the Silicon stone after pre-burning.
Silicious checker brick used for hot-blast furnace gravity flow castable prepared by the present embodiment is through gravity flow pouring molding, room temperature maintenance
24 ~ 30 hours, the demoulding, baking 24 ~ 30 hours under the conditions of 100 ~ 120 DEG C, after testing: silicious checker brick used for hot-blast furnace gravity flow waters
Material feeding from flow valuve be 105 ~ 140%；After the lower 1400 DEG C × 8h of weak oxide atmosphere burns, rupture strength is 7 ~ 8MPa；Weak oxide atmosphere
After lower 1400 DEG C × 8h burns, compressive resistance is 85 ~ 90MPa；Refractoriness under load after weak oxide atmosphere lower 1400 DEG C × 8h burning
(T0.6, 0.2MPa)) it is 1645 ~ 1650 DEG C.
Embodiment 5
A kind of silicious checker brick used for hot-blast furnace gravity flow castable and preparation method thereof.Described siliceous checker brick gravity flow castable
Raw material and content be: the Silicon stone after pre-burning is 85 ~ 90wt%, silicon powder is 4 ~ 10wt%, portland cement is 3 ~ 5wt%, ore deposit
Agent is 2 ~ 3wt%, polycarboxylic acids is 0.1 ~ 0.2wt% and Nano-meter SiO_22It is 0.05 ~ 0.15wt%.
The preparation method of described siliceous checker brick gravity flow castable is: by above-mentioned raw materials and content thereof, first by polycarboxylic acids
It is dissolved in the water accounting for described raw material 5 ~ 10wt%, obtains premix, then by remaining the raw material mix homogeneously in addition to polycarboxylic acids,
To premix；Then described premix is mixed with described premix, stir, obtain the siliceous grid of air stove
Brick gravity flow castable.
Silicon stone after pre-burning described in the present embodiment be Silicon stone is incubated under the conditions of calcined temperature is 1200 ~ 1300 DEG C 4 ~
5h, obtains the Silicon stone after pre-burning.
Silicious checker brick used for hot-blast furnace gravity flow castable prepared by the present embodiment is through gravity flow pouring molding, room temperature maintenance
24 ~ 30 hours, the demoulding, baking 24 ~ 30 hours under the conditions of 100 ~ 120 DEG C, after testing: silicious checker brick used for hot-blast furnace gravity flow waters
Material feeding from flow valuve be 110 ~ 145%；After the lower 1400 DEG C × 8h of weak oxide atmosphere burns, rupture strength is 7.5 ~ 8MPa；Weak oxide gas
After the lower 1400 DEG C × 8h of atmosphere burns, compressive resistance is 85 ~ 90MPa；Refractoriness under load after weak oxide atmosphere lower 1400 DEG C × 8h burning
(T0.6, 0.2MPa) and it is 1650 ~ 1655 DEG C.
Embodiment 6
A kind of silicious checker brick used for hot-blast furnace gravity flow castable and preparation method thereof.Described siliceous checker brick gravity flow castable
Raw material and content be: the Silicon stone after pre-burning is 87 ~ 92wt%, silicon powder is 3 ~ 9wt%, portland cement is 2 ~ 4wt%, ore deposit
Agent is 2 ~ 3wt%, polycarboxylic acids is 0.2 ~ 0.3wt% and Nano-meter SiO_22It is 0.15 ~ 0.25wt%.
The preparation method of described siliceous checker brick gravity flow castable is: by above-mentioned raw materials and content thereof, first by polycarboxylic acids
It is dissolved in the water accounting for described raw material 5 ~ 10wt%, obtains premix, then by remaining the raw material mix homogeneously in addition to polycarboxylic acids,
To premix；Then described premix is mixed with described premix, stir, obtain the siliceous grid of air stove
Brick gravity flow castable.
Silicon stone after pre-burning described in the present embodiment be Silicon stone is incubated under the conditions of calcined temperature is 1200 ~ 1300 DEG C 4 ~
5h, obtains the Silicon stone after pre-burning.
Silicious checker brick used for hot-blast furnace gravity flow castable prepared by the present embodiment is through gravity flow pouring molding, room temperature maintenance
24 ~ 30 hours, the demoulding, baking 24 ~ 30 hours under the conditions of 100 ~ 120 DEG C, after testing: silicious checker brick used for hot-blast furnace gravity flow waters
Material feeding from flow valuve be 85 ~ 115%；After the lower 1400 DEG C × 8h of weak oxide atmosphere burns, rupture strength is 9 ~ 11MPa；Weak oxide atmosphere
After lower 1400 DEG C × 8h burns, compressive resistance is 115 ~ 120MPa；Refractoriness under load after weak oxide atmosphere lower 1400 DEG C × 8h burning
(T0.6, 0.2MPa)) it is 1640 ~ 1655 DEG C.
Embodiment 7
A kind of silicious checker brick used for hot-blast furnace gravity flow castable and preparation method thereof.Described siliceous checker brick gravity flow castable
Raw material and content be: the Silicon stone after pre-burning is 89 ~ 94wt%, silicon powder is 2 ~ 7wt%, portland cement is 1 ~ 3wt%, ore deposit
Agent is 1 ~ 2wt%, polycarboxylic acids is 0.1 ~ 0.2wt% and Nano-meter SiO_22It is 0.25 ~ 0.35wt%.
The preparation method of described siliceous checker brick gravity flow castable is: by above-mentioned raw materials and content thereof, first by polycarboxylic acids
It is dissolved in the water accounting for described raw material 5 ~ 10wt%, obtains premix, then by remaining the raw material mix homogeneously in addition to polycarboxylic acids,
To premix；Then described premix is mixed with described premix, stir, obtain the siliceous grid of air stove
Brick gravity flow castable.
Silicon stone after pre-burning described in the present embodiment be Silicon stone is incubated under the conditions of calcined temperature is 1200 ~ 1300 DEG C 4 ~
5h, obtains the Silicon stone after pre-burning.
Silicious checker brick used for hot-blast furnace gravity flow castable prepared by the present embodiment is through gravity flow pouring molding, room temperature maintenance
24 ~ 30 hours, the demoulding, baking 24 ~ 30 hours under the conditions of 100 ~ 120 DEG C, after testing: silicious checker brick used for hot-blast furnace gravity flow waters
Material feeding from flow valuve be 30 ~ 85%；After the lower 1400 DEG C × 8h of weak oxide atmosphere burns, rupture strength is 7 ~ 8.5MPa；Weak oxide atmosphere
After lower 1400 DEG C × 8h burns, compressive resistance is 115 ~ 120MPa；Refractoriness under load after weak oxide atmosphere lower 1400 DEG C × 8h burning
(T0.6, 0.2MPa) and it is 1645 ~ 1655 DEG C.
Embodiment 8
A kind of silicious checker brick used for hot-blast furnace gravity flow castable and preparation method thereof.Described siliceous checker brick gravity flow castable
Raw material and content be: the Silicon stone after pre-burning is 90 ~ 95wt%, silicon powder is 1 ~ 6wt%, portland cement is 1 ~ 2wt%, ore deposit
Agent is 1 ~ 2wt%, polycarboxylic acids is 0.2 ~ 0.3wt% and Nano-meter SiO_22It is 0.05 ~ 0.15wt%.
The preparation method of described siliceous checker brick gravity flow castable is: by above-mentioned raw materials and content thereof, first by polycarboxylic acids
It is dissolved in the water accounting for described raw material 5 ~ 10wt%, obtains premix, then by remaining the raw material mix homogeneously in addition to polycarboxylic acids,
To premix；Then described premix is mixed with described premix, stir, obtain the siliceous grid of air stove
Brick gravity flow castable.
Silicon stone after pre-burning described in the present embodiment be Silicon stone is incubated under the conditions of calcined temperature is 1200 ~ 1300 DEG C 4 ~
5h, obtains the Silicon stone after pre-burning.
Silicious checker brick used for hot-blast furnace gravity flow castable prepared by the present embodiment is through gravity flow pouring molding, room temperature maintenance
24 ~ 30 hours, the demoulding, baking 24 ~ 30 hours under the conditions of 100 ~ 120 DEG C, after testing: silicious checker brick used for hot-blast furnace gravity flow waters
Material feeding from flow valuve be 105 ~ 140%；After the lower 1400 DEG C × 8h of weak oxide atmosphere burns, rupture strength is 8 ~ 9MPa；Weak oxide atmosphere
After lower 1400 DEG C × 8h burns, compressive resistance is 85 ~ 95MPa；Refractoriness under load after weak oxide atmosphere lower 1400 DEG C × 8h burning
(T0.6, 0.2MPa) and it is 1650 ~ 1655 DEG C.
This detailed description of the invention compared with prior art has a following good effect:
Use gravity flow castable, castable can be flow automatically molding, is sufficient filling with each position of checker brick mould, it is to avoid grid
The fault of construction of brick.
Silicon stone, through 1100 ~ 1300 DEG C, after insulation 5h pre-burning, has micro-crack to produce, and structure becomes loose, and has certain
The metastable state cristobalite of amount generates mutually with glass.Silicon stone premature inflation, can reduce silicious checker brick used for hot-blast furnace gravity flow and water
The internal stress that material feeding produces in sintering process, the metastable state cristobalite changed in advance may advantageously facilitate the generation of tridymite ore deposit phase,
And micro-crack can effectively suppress further expanding of crackle, reaches the effect of microcrack evolution equation.The siliceous grid of air stove
The physical properties of brick gravity flow castable is improved significantly.
Introduce a small amount of Nano-meter SiO_22Siliceous castable, burn till under weak oxide atmosphere, because of Nano-meter SiO_22Size is little, surface
Atom number is big, thus surface can be high, has high activity, extremely unstable, it is easy to be combined with other atoms, its fusing point and burning
Junction temperature is more much lower than conventional powder.Nano-meter SiO_22The sintering of silicious checker brick used for hot-blast furnace gravity flow castable can be promoted,
Improve its properties further.
Silicious checker brick used for hot-blast furnace gravity flow castable prepared by this detailed description of the invention is through gravity flow pouring molding, room
Replenishing vital QI with drugs of warm nature protects 24 ~ 30 hours, the demoulding, baking 24 ~ 30 hours under the conditions of 100 ~ 120 DEG C, after testing: silicious checker brick used for hot-blast furnace is certainly
Streaming castable from flow valuve be 30 ~ 145%；After the lower 1400 DEG C × 8h of weak oxide atmosphere burns, rupture strength is 5.5 ~ 11MPa；Weak
After the lower 1400 DEG C × 8h of oxidizing atmosphere burns, compressive resistance is 75 ~ 120MPa；After the lower 1400 DEG C × 8h of weak oxide atmosphere burns, loading is soft
Change temperature (T0.6, 0.2MPa) and it is 1635 ~ 1655 DEG C.
Silicious checker brick used for hot-blast furnace gravity flow castable prepared by this detailed description of the invention changes conventional thermal wind furnace and uses
The manufacture technology of siliceous checker brick, has that moulding process is simple, percent defective is low, the feature of low cost, and prepared air stove is used
In siliceous checker brick gravity flow castable, high-temperature behavior is excellent, normal temperature strength is big, refractoriness under load is high, volume stability is good and
Service life is long.
Claims (7)
1. the preparation method of a silicious checker brick used for hot-blast furnace gravity flow castable, it is characterised in that described siliceous checker brick are certainly
Raw material and the content thereof of streaming castable is: the Silicon stone after pre-burning is 85 ~ 95wt%, silicon powder is 1 ~ 10wt%, portland cement
Be 1 ~ 5wt%, mineralizer be 1 ~ 3wt%, polycarboxylic acids be 0.1 ~ 0.3wt% and Nano-meter SiO_22It is 0.05 ~ 0.35wt%；
The preparation method of described siliceous checker brick gravity flow castable is: by above-mentioned raw materials and content thereof, be first dissolved in by polycarboxylic acids
Account in the water of described raw material 5 ~ 10wt%, obtain premix, then by remaining the raw material mix homogeneously in addition to polycarboxylic acids, obtain pre-
Compound；Then described premix is mixed with described premix, stir, obtain silicious checker brick used for hot-blast furnace certainly
Streaming castable.
The preparation method of silicious checker brick used for hot-blast furnace gravity flow castable the most according to claim 1, it is characterised in that
Silicon stone after described pre-burning is that Silicon stone is incubated under the conditions of calcined temperature is 1100 ~ 1300 DEG C 4 ~ 5h, obtains the silicon after pre-burning
Stone；The SiO of the Silicon stone after pre-burning2Content >=98wt%；The grain composition of the Silicon stone after pre-burning is: particle diameter is less than 5mm and is more than
Accounting for raw material 7 ~ 10wt% in 3mm, particle diameter accounts for raw material 28 ~ 30wt% less than 3mm more than or equal to 1mm, and particle diameter is less than 1mm and is more than or equal to
0.088mm accounts for raw material 23 ~ 25wt%, and particle diameter accounts for raw material 27 ~ 30wt% less than 0.088mm.
The preparation method of silicious checker brick used for hot-blast furnace gravity flow castable the most according to claim 1, it is characterised in that
The SiO of described silicon powder2Content >=95wt%；Particle diameter≤0.6 μm of described silicon powder.
The preparation method of silicious checker brick used for hot-blast furnace gravity flow castable the most according to claim 1, it is characterised in that
The main chemical compositions of described portland cement is: SiO2Content is 18 ~ 22wt%, and CaO content is 50 ~ 55wt%；Described silicic acid
Particle diameter≤the 0.088mm of salt cement.
The preparation method of silicious checker brick used for hot-blast furnace gravity flow castable the most according to claim 1, it is characterised in that
Described mineralizer is Fe2O3And MnO2Mixture；Fe2O3And MnO2Mass ratio be 1: 0.9 ~ 1.
The preparation method of silicious checker brick used for hot-blast furnace gravity flow castable the most according to claim 1, it is characterised in that
Described Nano-meter SiO_22SiO2Content >=99.5%；Described Nano-meter SiO_22Particle diameter≤30nm.
7. a silicious checker brick used for hot-blast furnace gravity flow castable, it is characterised in that described silicious checker brick used for hot-blast furnace flows automatically
Formula castable is according to the silicious checker brick used for hot-blast furnace gravity flow castable according to any one of claim 1 ~ 6 and system thereof
Silicious checker brick used for hot-blast furnace gravity flow castable prepared by Preparation Method.
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| JPS60103074A (en) * | 1983-11-04 | 1985-06-07 | 品川白煉瓦株式会社 | Silica brick |
| CN101323530A (en) * | 2008-07-01 | 2008-12-17 | 山东中齐耐火材料集团有限公司 | Fused quartz block for coke oven hot repair |
| CN102126866A (en) * | 2011-04-06 | 2011-07-20 | 瑞泰科技股份有限公司 | High-purity silica refractory material and production process thereof |
| CN103880439A (en) * | 2014-02-17 | 2014-06-25 | 武汉科技大学 | Preparation method of light-weight silica brick |
| CN105152659A (en) * | 2015-07-09 | 2015-12-16 | 浙江长兴银兴窑业有限公司 | Composite silicon brick and preparation method thereof |
| CN105272289A (en) * | 2015-10-13 | 2016-01-27 | 中钢集团耐火材料有限公司 | Anti-erosion silica brick for carbon calcination furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60103074A (en) * | 1983-11-04 | 1985-06-07 | 品川白煉瓦株式会社 | Silica brick |
| CN101323530A (en) * | 2008-07-01 | 2008-12-17 | 山东中齐耐火材料集团有限公司 | Fused quartz block for coke oven hot repair |
| CN102126866A (en) * | 2011-04-06 | 2011-07-20 | 瑞泰科技股份有限公司 | High-purity silica refractory material and production process thereof |
| CN103880439A (en) * | 2014-02-17 | 2014-06-25 | 武汉科技大学 | Preparation method of light-weight silica brick |
| CN105152659A (en) * | 2015-07-09 | 2015-12-16 | 浙江长兴银兴窑业有限公司 | Composite silicon brick and preparation method thereof |
| CN105272289A (en) * | 2015-10-13 | 2016-01-27 | 中钢集团耐火材料有限公司 | Anti-erosion silica brick for carbon calcination furnace |
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