CN102674858B - Plastic composite-phase anti-stripping and wear-resisting mullite brick and preparation method thereof - Google Patents
Plastic composite-phase anti-stripping and wear-resisting mullite brick and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a plastic composite-phase anti-stripping and wear-resisting mullite brick and a preparation method thereof, wherein the raw materials of the mullite brick comprise dry-mixed material, SiC ultrafine powder and a binder; the dry-mixed material comprises the following constituents in percentage by weight: 5-25% of rotary kiln alumina fine powder, 5-25% of kaolin powder, 1-10% of andalusite concentrate powder, 15-35% of rotary kiln alumina particles, 10-30% of mullite particles and 10-30% of brown corundum particles; the dosage of the SiC ultrafine powder is 3-7% of the total weight of the dry-mixed material, and the dosage of the binder is 2-5% of the total weight of the dry-mixed material. The performance indexes of the plastic composite-phase anti-stripping and wear-resisting mullite brick are far higher than the performance indexes of the BM mullite brick used presently; and an analysis for trial use in a cooling chamber of a dry-quenching furnace indicates that the maximum abrasion loss of the plastic composite-phase anti-stripping and wear-resisting mullite brick for the cooling chamber of the dry-quenching furnace is not larger than 25 mm after being used for four years, and the mullite brick is concentrated at irregular masonries such as an oven manhole, and the abrasion loss of the wall part of the cooling chamber is not larger than 10 mm.
Description
Technical field
The invention belongs to fire resisting material field, be specifically related to a kind of plasticity compound phase antistripping wear-resistant type mullite brick and preparation method thereof.Plasticity compound phase antistripping wear-resistant type mullite brick of the present invention is the improvement by refractory brick performance to coke dry quenching furnace cooling room, can promote brick index performance, improves the work-ing life of its wear resisting property, the prolongation coke dry quenching furnace cooling room working surface layers brick of resistance to material.
Background technology
Big event as coking process energy-saving and emission-reduction---dry coke quenching is widespread use at home, along with applying of domestic maximization dry coke quenching, the development and research of Dry Quenching Technology gradually becomes industrial hot spot, especially for dry breakage of putting out resistance to material in stove in Dry Quenching Technology development and practical application, collapse, big area wearing and tearing problem anxious to be resolved especially, dry coke quenching body of heater is as the main body section of dry quenching system, and its importance is self-evident.But from present domestic existing dry quenching system running condition Kan，Chu chute district, annular passage collapse phenomenon general, cooling room working surface layers BM mullite brick heavy wear problem, also seriously restricts safe operation and the usefulness performance of dry coke quenching.
The dry abrasion mechanism of putting out stove cooling room brick: coke dry quenching furnace cooling room mainly completes the dry coke cooling effect in stove of putting out, the cooling draught of bottom is along making progress and top-down coke layer convective heat exchange, coke forms extruding and violent friction along dry putting out in the process that the cooling locular wall of stove moves downward with work face brick, makes the dry stove cooling room refractory wear that puts out.
Cause the dry major cause that stove cooling room refractory wear damages of putting out: be 1, to be that the material of refractory brick itself can not meet the requirement of dry coke quenching technique; 2, the refractory brick marshalling of cooling section is darker because of the hole that caused by the wearing and tearing of recycle gas coke powder, adds in recycle gas and has CO, within the scope of 300～600 ℃, can carry out chemical reaction 2CO → CO
2+ C, isolated free charcoal has erosion action to refractory materials, can cause refractory brick marshalling to break or damage completely, damaging main concentrating occurs in above the refractory brick marshalling of cooling section, temperature variation is also more frequent, so cooling section is selected high-strength wearable, BM type mullite brick that resistance to thermal shocks is good in when design.But the many problems that also exist in the actual use of this BM type mullite brick: the current coke dry quenching furnace cooling room trend that ubiquity abrasion loss continues to increase in actual use, the dry stove First Year cooling room work face brick different azimuth of putting out newly coming into operation is worn and torn at 30-50mm, Second Year reaches 75-100 mm, almost cooling room work face brick is worn away; Each applying unit also, take measures to eliminate abrasion loss by every possible means, keeps even coke discharging in operation as far as possible, reduces the irregular wear that coke discharging segregation produces; In annual overhaul, adopt wear-resistant castable to pour into a mould, slow down the generation of wearing and tearing, but produce little effect; After the wearing and tearing of work face brick produce, abrasion loss is aggravation constantly, the mode that adopts mould material cast to fill up can change the dry stove aspect ratio that puts out, affect the trend of air-flow in stove, coke discharging produces segregation, cooling performance declines and directly threatens coke discharging system operating safety, also can reduce dry coke quenching energy recovery and usefulness performance.
For the dry problem of putting out the resistance to material wearing and tearing of stove cooling room, contriver experiment repeatedly, analysis, comparison and on probation in, its index performance of BM mullite brick of finding cooling room use is at present relatively low, put out the needed performance index of actual bad working environments in stove and do not mate with dry, caused cooling room brick big area wear damage.Therefore need to develop a kind of new wear-resistant type mullite brick.
Summary of the invention
Object of the present invention provides a kind of plasticity compound phase antistripping wear-resistant type mullite brick.
Another object of the present invention is to provide a kind of preparation method of plasticity compound phase antistripping wear-resistant type mullite brick.
Object of the present invention can be achieved through the following technical solutions:
A kind of plasticity compound phase antistripping wear-resistant type mullite brick, it is that the raw material of described mullite brick comprises dry blend, SiC ultrafine powder and binding agent, described dry blend by weight percentage composition meter comprises following component: rotary kiln alumina fine powder 5% ~ 25%, kaolin powder 5% ~ 25%, andaluzite fine ore 1% ~ 10%, rotary kiln alumina particle 15% ~ 35%, mullite particle 10% ~ 30% and brown corundum in granules 10% ~ 30%, the consumption of described SiC ultrafine powder (silicon carbide ultrafine powder) is 3 ~ 7% of dry blend gross weight, and the consumption of described binding agent is 2 ~ 5% of dry blend gross weight.Described dry blend can only comprise rotary kiln alumina fine powder, kaolin powder, andaluzite fine ore, rotary kiln alumina particle, mullite particle and several components of brown corundum in granules, and each component sum of dry blend is 100%.In preferred described dry blend, the weight percentage of each component is: rotary kiln alumina fine powder 10% ~ 20%, kaolin powder 10% ~ 20%, andaluzite fine ore 3% ~ 7%, rotary kiln alumina particle 20% ~ 30%, mullite particle 15% ~ 25% and brown corundum in granules 15% ~ 25%.In the formula of dry blend, rotary kiln alumina particle, mullite particle and brown corundum in granules are aggregate.
Above-mentioned plasticity compound phase antistripping wear-resistant type mullite brick, it is that described binding agent is silicon sol.
Above-mentioned plasticity compound phase antistripping wear-resistant type mullite brick, it is that the fineness of each component or particle diameter are: rotary kiln alumina fine powder 200 ~ 400 orders, kaolin powder 100 ~ 300 orders, andaluzite fine ore 350 ~ 600 orders, rotary kiln alumina particle particle diameter 3 ~ 5mm, mullite particle particle diameter 1 ~ 3mm, brown corundum in granules particle diameter≤1mm, SiC ultrafine powder particle diameter≤1 μ m.
Above-mentioned plasticity compound phase antistripping wear-resistant type mullite brick, its weight percentage that is main chemical compositions in described rotary kiln alumina fine powder or rotary kiln alumina particle, kaolin powder, andaluzite fine ore, mullite particle and brown corundum in granules is:
Rotary kiln alumina fine powder or rotary kiln alumina particle: Al
2o
3content>=86%, Fe
2o
3content≤1.3%;
Kaolin powder: Al
2o
3content>=45%, Fe
2o
3content≤2.0%;
Andaluzite fine ore: Al
2o
3content>=57%, Fe
2o
3content≤1.5%;
Mullite particle: 3Al
2o
3.SiO
2content 68 ~ 72%;
Palm fibre corundum in granules: Al
2o
3content>=93%, Fe
2o
3content≤0.8%.
Above-mentioned plasticity compound phase antistripping wear-resistant type mullite brick, it is to adopt following methods preparation:
(1) take in proportion after rotary kiln alumina fine powder, kaolin powder and andaluzite fine ore mix and make premix powder;
(2) after taking in proportion rotary kiln alumina particle, mullite particle and brown corundum in granules and mixing, add part binding agent and stir, and then the premix powder and the SiC ultrafine powder that add respectively step (1) to prepare, after stirring, then add remaining binding agent to mix;
(3) mixture moulding step (2) being obtained, burn till.
Described sintering process is followed successively by: the adobe of moulding mullite brick is slowly warming up to 150 ~ 200 ℃ with the heat-up rate of 5 ~ 15 ℃/h, then the heat-up rate with 15 ~ 20 ℃/h is warming up to 450 ℃, is more at the uniform velocity warming up to 950 ℃ and be incubated 1.5 ~ 3 hours with the heat-up rate of 25 ~ 35 ℃/h; Then above-mentioned adobe is rapidly heated to 1500 ℃, and insulation be not less than 3 hours, the heat-up rate while being warmed up to 1500 ℃ by 1250 ℃ is 50 ~ 60 ℃/h; Finally mullite brick is cooled to normal temperature.
The preparation method of above-mentioned plasticity compound phase antistripping wear-resistant type mullite brick, it is to comprise the following steps:
(1) take in proportion after rotary kiln alumina fine powder, kaolin powder and andaluzite fine ore mix and make premix powder;
(2) after taking in proportion rotary kiln alumina particle, mullite particle and brown corundum in granules and mixing, add part binding agent and stir, and then the premix powder and the SiC ultrafine powder that add respectively step (1) to prepare, after stirring, then add remaining binding agent to mix;
(3) mixture moulding step (2) being obtained, burn till.
The preparation method of above-mentioned plasticity compound phase antistripping wear-resistant type mullite brick, it is that described sintering process is followed successively by: the adobe of moulding mullite brick is slowly warming up to 150 ~ 200 ℃ with the heat-up rate of 5 ~ 15 ℃/h, then the heat-up rate with 15 ~ 20 ℃/h is warming up to 450 ℃, is more at the uniform velocity warming up to 950 ℃ and be incubated 1.5 ~ 3 hours with the heat-up rate of 25 ~ 35 ℃/h; Then above-mentioned adobe is rapidly heated to 1500 ℃, and insulation be not less than 3 hours, the heat-up rate while being warmed up to 1500 ℃ by 1250 ℃ is 50 ~ 60 ℃/h; Finally mullite brick is cooled to normal temperature.
The preparation method of above-mentioned plasticity compound phase antistripping wear-resistant type mullite brick, it is that the fineness of each component or particle diameter are: rotary kiln alumina fine powder 200 ~ 400 orders, kaolin powder 100 ~ 300 orders, andaluzite fine ore 350 ~ 600 orders, rotary kiln alumina particle particle diameter 3 ~ 5mm, mullite particle particle diameter 1 ~ 3mm, brown corundum in granules particle diameter≤1mm, SiC ultrafine powder particle diameter≤1 μ m.
Burning till is one of last procedure in refractory product production process.The temperature of plasticity compound phase antistripping wear-resistant type mullite adobe in sintering process controlled and comprised in detail following several stage:
Base substrate is discharged the moisture content stage: normal temperature is within the scope of 150-200 ℃, for getting rid of the stage of the inner remaining moisture content of base substrate.At this stage heat-up rate, with 5-15 ℃/h, slowly heat up, heat up unsuitable too fast, otherwise can make in base substrate water vapor pressure excessive and goods are burst.The firing time in this stage is general >=10h, and suitably improve the speed of smoke extractor.
The decomposition of base substrate mineral and impure mineral and the elimination phase of constitution water: its temperature range is about 200-950 ℃.Organism (as silica sol binder) in the wear-resisting mullite brick adobe of plasticity compound phase antistripping etc. carries out chemical decomposition reaction, because kaolinic dehydration temperaturre is 450 ℃, within the scope of 200-450 ℃, with 15-20 ℃/h heat-up rate, slowly heat up, after this can suitably accelerate to heat up.450-950 ℃ of rotary kiln alumina also continuing secondary mulliteization reaction in addition, at the uniform velocity heats up and be incubated 1.5 ~ 3 hours during to 950 ℃ in this temperature range with 25 ~ 35 ℃/h.
Burn till the stage: from 950 ℃ to 1500 ℃, burn till end of a period.In adobe, each finely-powdered minerals forms liquid phase since 950 ℃ of left and right, and high temperature solution is filled the hole in adobe and various particulate material are bonded together, and makes brick body fine and close, strength increase, and adobe starts sintering.Along with the carrying out of nodulizing, base substrate shrinks in reaction, further promotes brick body fine and close, gains in strength.Not only because be furnished with SiC ultrafine powder but also be accompanied by intersection expansion, shrink like this and expand and cancelling out each other in addition, make volume stability better, in 950-1250 ℃ of temperature range, can at a gallop heat up, without restriction.At hot stage, particularly 1250 ℃ to stopping fiery temperature, and its heat-up rate should be more slowly, and generally the heat-up rate with 50-60 ℃/h heats up, so that brick body reaches abundant sintering and prevents the violent contraction of base substrate, makes goods ftracture with non-homogeneous expansion.The fiery temperature of stopping of plasticity compound phase antistripping wear-resistant type mullite brick is generally 1500 ℃ of left and right, soaking time number with the temperature difference (kiln type) in adobe size, special-shaped degree (setting density), kiln and heat-up rate, consider, generally soaking time is not less than 3h.
Cooling stages: mullite crystallization occurs in goods and possess physics contraction.Can in base substrate, produce certain stress, therefore at more than 800 ℃ temperature range planted agent Slow cooling, generally with naturally cooling, be advisable.800 ℃ of following temperature ranges can be used fan blast-cold hurry up, and wind is cooling.
The plasticity compound phase antistripping wear-resistant type cooling room of the present invention's research and development uses brick performance index YuBM mullite brick designing institute design objective in Table 1
Table 1 the present invention researches and develops the performance index of mullite brick and the design objective of existing BM type mullite brick
| Mullite brick of the present invention | BM type mullite brick | |
| Refractoriness ℃ | ≥1770 | ≥1770 |
| Refractoriness under load ℃ | ≥1600 | ≥1500 |
| Apparent porosity % | ≤15 | ≤17 |
| Volume density g/cm3 | ≥2.65 | ≥2.45 |
| Cold crushing strength MPa | ≥110 | ≥85 |
| Thermal shock resistance (1100 ℃ of water-cooleds) | ≥22 | ≥22 |
| Normal temperature abrasion loss | ≤4 | ≤10 |
| Al 2O 3?% | 55 | ≥55 |
| Fe 2O 3% | ＜1.5 | ≤1.3 |
Beneficial effect of the present invention:
Contriver is according to the present situation of the resistance to material wearing and tearing of domestic dry coke quenching cooling room, drop into substantial contribution and technical force in conjunction with the plasticity compound phase antistripping wear-resistant type cooling room brick of user's service requirements research and development, its performance index are much larger than the BM mullite brick of current use, warp is at the dry stove cooling room shake-down analysis that puts out, use the dry compound antistripping type≤25mm of stove cooling room greatest wear amount plasticity that puts out after 4 years, and concentrate on the irregular masonry places such as baker manhole, cooling room body of wall position abrasion loss≤10 mm.
Embodiment
Embodiment 1
Raw material comprises dry blend, SiC ultrafine powder and silica sol binder, described dry blend by weight percentage composition meter is comprised of rotary kiln alumina fine powder 15%, kaolin powder 15%, andaluzite fine ore 5%, rotary kiln alumina particle 25%, M70 mullite particle 20% and brown corundum in granules 20%, the consumption of described SiC ultrafine powder is 5% of dry blend gross weight, and the consumption of described silica sol binder is 3% of dry blend gross weight.
Preparation in the steps below:
(1) according to the above ratio, take the superfine rotary kiln alumina of 320 objects fine powders, 240 object kaolin powders and 500 object andaluzite fine ores, pour one by one the above-mentioned material taking into premix stirrer with muller and all close 20min and make premix powder;
(2) according to the above ratio, taking particle diameter is the rotary kiln alumina particle of 3 ~ 5mm, particle diameter is that the brown corundum in granules that the mullite particle of 1 ~ 3mm and particle diameter are 0.2 ~ 0.5mm drops in planetary stirring machine, stirring 5min mixes, and then (Zhejiang space reaches chemical industry to the silica sol binder that adds dry blend gross weight 1.5% in planetary stirring machine, the trade mark is ns-30) continue to stir 5min to even, and then the particle diameter that adds respectively premix powder prepared by step (1) and dry blend gross weight 5% is that the SiC ultrafine powder of 0.5 μ m is to stirring 5min in above-mentioned planetary stirring machine to evenly, finally add again remaining silica sol binder to stir 5min, after expecting look uniformity, discharging, be transported in the hopper of fitting room, moulding,
(3) burn till: burning till is one of operation very crucial in plasticity compound phase peeling-resistant antiwear brick refractory product production process, the temperature of adobe in sintering process controlled, and should follow following steps:
The adobe of moulding mullite brick is slowly warming up to 200 ℃ with the heat-up rate of 10 ℃/h, and then the heat-up rate with 18 ℃/h is warming up to 450 ℃, is more at the uniform velocity warming up to 950 ℃ and be incubated 2 hours with the heat-up rate of 30 ℃/h; Then above-mentioned adobe is rapidly heated to 1500 ℃, and is incubated 4 hours, the heat-up rate while being warmed up to 1500 ℃ by 1250 ℃ is 55 ℃/h; Finally mullite brick is cooled to normal temperature.When cooling, Slow cooling in 800 ℃ of above temperature ranges, is generally advisable with naturally cooling.800 ℃ of following temperature ranges can be used fan blast-cold, and wind is cooling.
Embodiment 2
Raw material comprises dry blend, SiC ultrafine powder and silica sol binder, described dry blend by weight percentage composition meter is comprised of rotary kiln alumina fine powder 10%, kaolin powder 20%, andaluzite fine ore 5%, rotary kiln alumina particle 30%, M70 mullite particle 15% and brown corundum in granules 20%, the consumption of described SiC ultrafine powder is 5% of dry blend gross weight, and the consumption of described silica sol binder is 4% of dry blend gross weight.
Preparation in the steps below:
(1) according to the above ratio, take the superfine rotary kiln alumina of 320 objects fine powders, 240 object kaolin powders and 500 object andaluzite fine ores, pour one by one the above-mentioned material taking into premix stirrer with muller and all close 20min and make premix powder;
(2) according to the above ratio, taking particle diameter is the rotary kiln alumina particle of 3 ~ 5mm, particle diameter is that the brown corundum in granules that the mullite particle of 1 ~ 3mm and particle diameter are 0.2 ~ 0.5mm drops in planetary stirring machine, stirring 5min mixes, and then (Zhejiang space reaches chemical industry to the silica sol binder that adds dry blend gross weight 2% in planetary stirring machine, the trade mark is ns-30) continue to stir 5min to even, and then the particle diameter that adds respectively premix powder prepared by step (1) and dry blend gross weight 5% is that the SiC ultrafine powder of 0.5 μ m is to stirring 5min in above-mentioned planetary stirring machine to evenly, finally add again remaining silica sol binder to stir 5min, after expecting look uniformity, discharging, be transported in the hopper of fitting room, moulding,
(3) burn till: burning till is one of operation very crucial in plasticity compound phase peeling-resistant antiwear brick refractory product production process, the temperature of adobe in sintering process controlled, and should follow following steps:
The adobe of moulding mullite brick is slowly warming up to 200 ℃ with the heat-up rate of 10 ℃/h, and then the heat-up rate with 18 ℃/h is warming up to 450 ℃, is more at the uniform velocity warming up to 950 ℃ and be incubated 2 hours with the heat-up rate of 30 ℃/h; Then above-mentioned adobe is rapidly heated to 1500 ℃, and is incubated 4 hours, the heat-up rate while being warmed up to 1500 ℃ by 1250 ℃ is 55 ℃/h; Finally mullite brick is cooled to normal temperature.When cooling, Slow cooling in 800 ℃ of above temperature ranges, is generally advisable with naturally cooling.800 ℃ of following temperature ranges can be used fan blast-cold, and wind is cooling.
Embodiment 3
Raw material comprises dry blend, SiC ultrafine powder and silica sol binder, described dry blend by weight percentage composition meter is comprised of rotary kiln alumina fine powder 20%, kaolin powder 10%, andaluzite fine ore 5%, rotary kiln alumina particle 20%, M70 mullite particle 20% and brown corundum in granules 25%, the consumption of described SiC ultrafine powder is 6% of dry blend gross weight, and the consumption of described silica sol binder is 3% of dry blend gross weight.
Preparation in the steps below:
(1) according to the above ratio, take the superfine rotary kiln alumina of 320 objects fine powders, 240 object kaolin powders and 500 object andaluzite fine ores, pour one by one the above-mentioned material taking into premix stirrer with muller and all close 20min and make premix powder;
(2) according to the above ratio, taking particle diameter is the rotary kiln alumina particle of 3 ~ 5mm, particle diameter is that the brown corundum in granules that the mullite particle of 1 ~ 3mm and particle diameter are 0.2 ~ 0.5mm drops in planetary stirring machine, stirring 5min mixes, and then (Zhejiang space reaches chemical industry to the silica sol binder that adds dry blend gross weight 1.5% in planetary stirring machine, the trade mark is ns-30) continue to stir 5min to even, and then the particle diameter that adds respectively premix powder prepared by step (1) and dry blend gross weight 6% is that the SiC ultrafine powder of 0.5 μ m is to stirring 5min in above-mentioned planetary stirring machine to evenly, finally add again remaining silica sol binder to stir 5min, after expecting look uniformity, discharging, be transported in the hopper of fitting room, moulding,
(3) burn till: burning till is one of operation very crucial in plasticity compound phase peeling-resistant antiwear brick refractory product production process, the temperature of adobe in sintering process controlled, and should follow following steps:
The adobe of moulding mullite brick is slowly warming up to 200 ℃ with the heat-up rate of 10 ℃/h, and then the heat-up rate with 18 ℃/h is warming up to 450 ℃, is more at the uniform velocity warming up to 950 ℃ and be incubated 2 hours with the heat-up rate of 30 ℃/h; Then above-mentioned adobe is rapidly heated to 1500 ℃, and is incubated 5 hours, the heat-up rate while being warmed up to 1500 ℃ by 1250 ℃ is 55 ℃/h; Finally mullite brick is cooled to normal temperature.When cooling, Slow cooling in 800 ℃ of above temperature ranges, is generally advisable with naturally cooling.800 ℃ of following temperature ranges can be used fan blast-cold, and wind is cooling.
The quality examination result of the plasticity compound phase antistripping wear-resistant type mullite brick of table 1 embodiment 1 ~ 3 preparation
Contriver is according to the present situation of the resistance to material wearing and tearing of domestic dry coke quenching cooling room, drop into substantial contribution and technical force and develop plasticity compound phase antistripping wear-resistant type cooling room brick in conjunction with user's service requirements, its performance index are much larger than the BM mullite brick of current use, warp is at the dry stove cooling room shake-down analysis that puts out, use the dry compound antistripping type≤25mm of stove cooling room greatest wear amount plasticity that puts out after 4 years, and concentrate on the irregular masonry places such as baker manhole, cooling room body of wall position abrasion loss≤10 mm.
，Wo company and cooperation unit are through long-term cooperation, joint exploration in sum, and the use that has proved plasticity complex phase antistripping mullite brick of the present invention is the current long-life scheme of a kind of good solution coke dry quenching furnace cooling section.
Claims (8)
1. a plasticity compound phase antistripping wear-resistant type mullite brick, the raw material that it is characterized in that described mullite brick comprises dry blend, SiC ultrafine powder and binding agent, described dry blend by weight percentage composition meter comprises following component: rotary kiln alumina fine powder 5%～25%, kaolin powder 5%～25%, andaluzite fine ore 1%～10%, rotary kiln alumina particle 15%～35%, mullite particle 10%～30% and brown corundum in granules 10%～30%, the consumption of described SiC ultrafine powder is 3～7% of dry blend gross weight, and the consumption of described binding agent is 2～5% of dry blend gross weight;
The preparation of employing following methods:
(1) take in proportion after rotary kiln alumina fine powder, kaolin powder and andaluzite fine ore mix and make premix powder;
(2) after taking in proportion rotary kiln alumina particle, mullite particle and brown corundum in granules and mixing, add part binding agent and stir, and then the premix powder and the SiC ultrafine powder that add respectively step (1) to prepare, after stirring, then add remaining binding agent to mix;
(3) mixture moulding step (2) being obtained, burn till;
Described sintering process is followed successively by: the adobe of moulding mullite brick is slowly warming up to 150～200 ℃ with the heat-up rate of 5～15 ℃/h, then the heat-up rate with 15～20 ℃/h is warming up to 450 ℃, is more at the uniform velocity warming up to 950 ℃ and be incubated 1.5～3 hours with the heat-up rate of 25～35 ℃/h; Then above-mentioned adobe is rapidly heated to 1500 ℃, and insulation be not less than 3 hours, the heat-up rate while being warmed up to 1500 ℃ by 1250 ℃ is 50～60 ℃/h; Finally mullite brick is cooled to normal temperature.
2. plasticity compound phase antistripping wear-resistant type mullite brick according to claim 1, is characterized in that the weight percentage of each component in described dry blend is: rotary kiln alumina fine powder 10%～20%, kaolin powder 10%～20%, andaluzite fine ore 3%～7%, rotary kiln alumina particle 20%～30%, mullite particle 15%～25% and brown corundum in granules 15%～25%.
3. plasticity compound phase antistripping wear-resistant type mullite brick according to claim 1, is characterized in that described binding agent is silicon sol.
4. plasticity compound phase antistripping wear-resistant type mullite brick according to claim 1 and 2, the fineness or the particle diameter that it is characterized in that each component are: rotary kiln alumina fine powder 200～400 orders, kaolin powder 100～300 orders, andaluzite fine ore 350～600 orders, rotary kiln alumina particle particle diameter 3～5mm, mullite particle particle diameter 1～3mm, brown corundum in granules particle diameter≤1mm, SiC ultrafine powder particle diameter≤1 μ m.
5. plasticity compound phase antistripping wear-resistant type mullite brick according to claim 1 and 2, is characterized in that the weight percentage of main chemical compositions in described rotary kiln alumina fine powder or rotary kiln alumina particle, kaolin powder, andaluzite fine ore, mullite particle and brown corundum in granules is:
Rotary kiln alumina fine powder or rotary kiln alumina particle: Al
2o
3content>=86%, Fe
2o
3content≤1.3%;
Kaolin powder: Al
2o
3content>=45%, Fe
2o
3content≤2.0%;
Andaluzite fine ore: Al
2o
3content>=57%, Fe
2o
3content≤1.5%;
Mullite particle: 3Al
2o
3.SiO
2content 68～72%;
Palm fibre corundum in granules: Al
2o
3content>=93%, Fe
2o
3content≤0.8%.
6. the preparation method of plasticity compound phase antistripping wear-resistant type mullite brick claimed in claim 1, is characterized in that comprising the following steps:
(1) take in proportion after rotary kiln alumina fine powder, kaolin powder and andaluzite fine ore mix and make premix powder;
(2) after taking in proportion rotary kiln alumina particle, mullite particle and brown corundum in granules and mixing, add part binding agent and stir, and then the premix powder and the SiC ultrafine powder that add respectively step (1) to prepare, after stirring, then add remaining binding agent to mix;
(3) mixture moulding step (2) being obtained, burn till.
7. the preparation method of plasticity compound phase antistripping wear-resistant type mullite brick according to claim 6, it is characterized in that described sintering process is followed successively by: the adobe of moulding mullite brick is slowly warming up to 150～200 ℃ with the heat-up rate of 5～15 ℃/h, then the heat-up rate with 15～20 ℃/h is warming up to 450 ℃, is more at the uniform velocity warming up to 950 ℃ and be incubated 1.5～3 hours with the heat-up rate of 25～35 ℃/h; Then above-mentioned adobe is rapidly heated to 1500 ℃, and insulation be not less than 3 hours, the heat-up rate while being warmed up to 1500 ℃ by 1250 ℃ is 50～60 ℃/h; Finally mullite brick is cooled to normal temperature.
8. the preparation method of plasticity compound phase antistripping wear-resistant type mullite brick according to claim 6, the fineness or the particle diameter that it is characterized in that each component are: rotary kiln alumina fine powder 200～400 orders, kaolin powder 100～300 orders, andaluzite fine ore 350～600 orders, rotary kiln alumina particle particle diameter 3～5mm, mullite particle particle diameter 1～3mm, brown corundum in granules particle diameter≤1mm, SiC ultrafine powder particle diameter≤1 μ m.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210160404.8A CN102674858B (en) | 2012-05-22 | 2012-05-22 | Plastic composite-phase anti-stripping and wear-resisting mullite brick and preparation method thereof |
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|---|---|---|---|
| CN201210160404.8A CN102674858B (en) | 2012-05-22 | 2012-05-22 | Plastic composite-phase anti-stripping and wear-resisting mullite brick and preparation method thereof |
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| CN103833387B (en) * | 2012-12-04 | 2016-01-20 | 江苏顺星耐火科技有限公司 | High abrasion silicon mullite red brick and preparation technology thereof |
| CN104016692B (en) * | 2014-06-06 | 2016-03-16 | 武汉钢铁(集团)公司 | A kind of coke dry quenching furnace cooling section refractory materials and preparation method |
| CN104744059B (en) * | 2015-03-20 | 2016-09-28 | 湖南湘钢瑞泰科技有限公司 | A kind of dry coke quenching mullite brick and preparation method thereof |
| CN104944980A (en) * | 2015-05-29 | 2015-09-30 | 柳州普亚贸易有限公司 | Preparation method of wear-resistant corrosion-resistant brick |
| CN106278299A (en) * | 2016-07-21 | 2017-01-04 | 济源市金峰耐火材料有限公司 | Andalusite composite refractory brick and its preparation method and application |
| CN107188548B (en) * | 2017-07-14 | 2021-09-17 | 山东耐材集团鲁耐窑业有限公司 | Wear-resistant brick and preparation method thereof |
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