CN103664205A - Thermal shock-resistant low-expansion andalusite castable - Google Patents
Thermal shock-resistant low-expansion andalusite castable Download PDFInfo
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- CN103664205A CN103664205A CN201310559838.XA CN201310559838A CN103664205A CN 103664205 A CN103664205 A CN 103664205A CN 201310559838 A CN201310559838 A CN 201310559838A CN 103664205 A CN103664205 A CN 103664205A
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Abstract
The invention discloses a thermal shock-resistant low-expansion andalusite castable comprising the following components in percentage by mass: 40-70% of aggregate, 8-22% of fine powder, 5-20% of micro powder, 3-10% of composite additive, 3-6% of binding agent and 1-2% of heat resistant steel fiber. The castable is stable in quality, high in strength, resistant to thermal shock, erosion and stripping, long in service life, rapid in construction and kiln drying and short in maintenance period.
Description
Technical field
The present invention relates to anti-thermal shock low bulk andaluzite mould material.
Background technology
Alternately, environment thermal shock is stronger for the long-term rapid heat cycle of Working environment of rotary cement kiln eye, and the resistance to material of cylindrical shell is prone to internal stress and concentrates and damage under frequent thermal shock effect; Rotary kiln kilneye temperature is high, and in hot flue gas, impurity is many, alkali components weight, and grog souring is strong, and dust is large, also contains a certain amount of liquid phase in grog, and medium and grog are strong to rotary kiln kilneye working layer souring, and chemical erosion is serious; Although there has been fine good refractory castable to substitute traditional refractory brick at this position, but more or less there is some defect at aspect of performance in these refractory castablies, the special operation condition condition of kilneye, the liquid phase in high alkalinity composition and grog in medium particularly, the two acting in conjunction at high temperature causes a lot of refractory materialss to be vulnerable to chemical erosion in this position life-time service process, deteriorated material property, has shortened the materials'use life-span.Rotary kiln is through long-time running, all can there is certain deformation in cylinder shell, this deformation can produce larger torsional interaction to the resistance to material of cylinder of rotary kiln, under the shear-stress of torsional interaction, easily there is physical damage in cylindrical shell refractory materials, even cracking comes off and causes rotary kiln to stop kiln repairing, to manufacturing enterprise, bring no small financial loss, rotary kiln requires harsher to construction period now, the requirement cycle is short, baking kiln is fast, can put into production use than faster, these are all had higher requirement to the resistance to material use properties of cylinder of rotary kiln and application property.
Summary of the invention
Problem to be solved by this invention is to provide anti-thermal shock low bulk andaluzite mould material, steady quality, and intensity is high, anti-thermal shock, anti-erosion, antistripping, long service life, construction is fast, dries kiln fast, and curing cycle is short.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme: anti-thermal shock low bulk andaluzite mould material, comprises that the mass percent of following component and each component is:
Improved, mould material is comprised of aggregate, fine powder, micro mist, composite additive, bonding agent and heat-resistant steel fiber.
Improved, a aggregate comprises that the mass percent of following component and each component is:
Improved, a aggregate comprises that the mass percent of following component and each component is:
Improved, a fine powder comprises that the mass percent of following component and each component is:
Improved, a fine powder comprises that the mass percent of following component and each component is:
Improved, described micro mist is the combination of SiO 2 superfine powder and activated alumina super-fine powder, or institute's micro mist is the combination of SiO 2 superfine powder, activated alumina super-fine powder and modification mullite miropowder.
Improved, described composite additive is the combination of tripoly phosphate sodium STPP and explosion-proof fiber, or described composite additive is the combination of Sodium hexametaphosphate 99 and explosion-proof fiber, or described composite additive is the combination of tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 and explosion-proof fiber.
Improved, described bonding agent is the combination of high-alumina cement and pure calcium aluminate cement.
Beneficial effect:
Adopt after technique scheme, this invention anti-thermal shock low bulk andaluzite mould material,
1) selected fine and close fused corundom aggregate, electrofused mullite aggregate and one-level bauxite chamotte as the aggregate of mould material, to meet, the resistance to elevated temperatures of mould material requires and the sintered ceramic of strengthening aggregate with between powder is combined;
2) introduced andaluzite-sillimanite complex slag:
A. andaluzite-sillimanite complex slag produces mullite under certain temperature effect, produces gentle volume effect, makes the densification of mould material weave construction, has made up mould material weave construction defect, has improved mould material bulk strength;
B. attach simultaneously and form at high temperature active high glassy phase SiO
2, promote and participate in the high-energy state SiO on SiO 2 superfine powder, activated alumina super-fine powder and mullite aggregate surface in matrix
2between secondary mullite reaction, between aggregate matrix, form network-like Ceramic bond, further improve mould material bulk strength and wear resistance;
C. the high-energy state SiO on mullite aggregate surface
2the secondary mullite reaction participating between matrix makes mould material integral body be low-energy state inertia, and the alkali components in medium and the liquid phase difficulty in grog cause erosion to mould material;
D. the volume effect of andaluzite-sillimanite complex slag in mullitization process forms segmentation crack at mould material organization internal, segmentation crack is stopped by silicon carbide, can not form coherent map cracking, independently therefore segmentation crack can absorb and the thermal stresses producing when material rapid heat cycle, reduce thermal stresses and concentrate, improved material thermal shock resistance;
3) add the carbide fine powder of appropriate high-temperature wearable with high-temperature stability, wear resistance and the resistance to fouling of raising mould material, thereby extended the work-ing life of mould material;
4) adopt composite additive to improve the workability of mould material;
5) select rational component proportion simultaneously, made Al in mould material
2o
3quality percentage composition>=80% with SiC, make the volume density>=2.70g/cm3 of mould material, cold conditions folding strength (110 ℃ * 24h)>=9MPa, cold conditions folding strength (1100 ℃ * 3h)>=10MPa, cold conditions folding strength (1350 ℃ * 3h)>=11MPa, cold conditions compressive strength (110 ℃ * 24h)>=80MPa, cold conditions compressive strength (1100 ℃ * 3h)>=90MPa, cold conditions compressive strength (1350 ℃ * 3h)>=110MPa, after burning, line velocity of variation (1100 ℃ * 3h) is ± 0.20%, after burning, line velocity of variation (1350 ℃ * 3h) is 0～0.40%, (1100 ℃ of heat-shock resistances, air-cooled)>=30 times, wear resistance (1100 ℃)≤4cm
3, height is stablized in the applied at elevated temperature excellent property of mould material, thermal shock, wear resistance is good, chemical resistance of concrete ability is strong, well adapts to the requirement of rotary kiln kilneye special operation condition condition.
Embodiment
Below in conjunction with embodiment, further illustrate anti-thermal shock low bulk andaluzite mould material of the present invention:
Embodiment mono-:
Anti-thermal shock low bulk andaluzite mould material comprises that the mass percent of following component and each component is: aggregate 40%, fine powder 22%, micro mist 20%, composite additive 10%, bonding agent 6% and heat-resistant steel fiber 2%, as preferably, anti-thermal shock low bulk andaluzite mould material is only by aggregate, fine powder, micro mist, composite additive, bonding agent and heat-resistant steel fiber form, and wherein, a aggregate comprises that granularity is the fine and close fused corundom aggregate 40% of 0.1-8mm, granularity is the electrofused mullite aggregate 30% of 0.1-8mm, granularity is andalusite aggregate 10% and the one-level bauxite chamotte 20% of 0.1-3mm, and a fine powder comprises the fine and close fused corundom fine powder 20% of granularity≤180 object, granularity≤180 object plate diamond spar fine powder 22%, mullite fine powder 20%, granularity≤180 object andaluzite fine powder 10%, andaluzite-sillimanite complex slag 8%, carbide fine powder 10% and zirconium silicate fine powder 10%, described micro mist is the combination of SiO 2 superfine powder and activated alumina super-fine powder, or institute's micro mist is SiO 2 superfine powder, the combination of activated alumina super-fine powder and modification mullite miropowder, described composite additive is the combination of tripoly phosphate sodium STPP and explosion-proof fiber, or described composite additive is the combination of Sodium hexametaphosphate 99 and explosion-proof fiber, or described composite additive is tripoly phosphate sodium STPP, the combination of Sodium hexametaphosphate 99 and explosion-proof fiber, described bonding agent is the combination of high-alumina cement and pure calcium aluminate cement.
Embodiment bis-:
Anti-thermal shock low bulk andaluzite mould material comprises that the mass percent of following component and each component is: aggregate 70%, fine powder 8%, micro mist 5%, composite additive 10%, bonding agent 6% and heat-resistant steel fiber 1%, as preferably, anti-thermal shock low bulk andaluzite mould material is only by aggregate, fine powder, micro mist, composite additive, bonding agent and heat-resistant steel fiber form, and wherein, a aggregate comprises that granularity is the fine and close fused corundom aggregate 60% of 0.1-8mm, granularity is the electrofused mullite aggregate 20% of 0.1-8mm, granularity is andalusite aggregate 5% and the one-level bauxite chamotte 15% of 0.1-3mm, and a fine powder comprises the fine and close fused corundom fine powder 30% of granularity≤180 object, granularity≤180 object plate diamond spar fine powder 20%, mullite fine powder 12%, granularity≤180 object andaluzite fine powder 10%, andaluzite-sillimanite complex slag 8%, carbide fine powder 10% and zirconium silicate fine powder 10%, described micro mist is the combination of SiO 2 superfine powder and activated alumina super-fine powder, described composite additive is the combination of tripoly phosphate sodium STPP and explosion-proof fiber, or described composite additive is the combination of Sodium hexametaphosphate 99 and explosion-proof fiber, or described composite additive is tripoly phosphate sodium STPP, the combination of Sodium hexametaphosphate 99 and explosion-proof fiber, described bonding agent is the combination of high-alumina cement and pure calcium aluminate cement.
Embodiment tri-:
Anti-thermal shock low bulk andaluzite mould material comprises that the mass percent of following component and each component is: aggregate 55%, fine powder 15%, micro mist 13%, composite additive 10%, bonding agent 5% and heat-resistant steel fiber 2%, as preferably, anti-thermal shock low bulk andaluzite mould material is only by aggregate, fine powder, micro mist, composite additive, bonding agent and heat-resistant steel fiber form, and wherein, a aggregate comprises that granularity is the fine and close fused corundom aggregate 50% of 0.1-8mm, granularity is the electrofused mullite aggregate 25% of 0.1-8mm, granularity is andalusite aggregate 8% and the one-level bauxite chamotte 17% of 0.1-3mm, and a fine powder comprises the fine and close fused corundom fine powder 25% of granularity≤180 object, granularity≤180 object plate diamond spar fine powder 21%, mullite fine powder 12%, granularity≤180 object andaluzite fine powder 12%, andaluzite-sillimanite complex slag 8%, carbide fine powder 12% and zirconium silicate fine powder 10%, described micro mist is the combination of SiO 2 superfine powder and activated alumina super-fine powder, or institute's micro mist is SiO 2 superfine powder, the combination of activated alumina super-fine powder and modification mullite miropowder, described composite additive is the combination of tripoly phosphate sodium STPP and explosion-proof fiber, or described composite additive is the combination of Sodium hexametaphosphate 99 and explosion-proof fiber, or described composite additive is tripoly phosphate sodium STPP, the combination of Sodium hexametaphosphate 99 and explosion-proof fiber, described bonding agent is the combination of high-alumina cement and pure calcium aluminate cement.
Embodiment tetra-:
Above-mentioned aggregate can be replaced by the aggregate that comprises granularity is the fine and close fused corundom aggregate of 0.1-8mm, electrofused mullite aggregate that granularity is 0.1-8mm, granularity is 0.1-3mm andalusite aggregate, one-level bauxite chamotte and brown corundum aggregate.
In a aggregate, the weight percent of andalusite aggregate, one-level bauxite chamotte and brown corundum aggregate that granularity is the fine and close fused corundom aggregate of 0.1-8mm, electrofused mullite aggregate that granularity is 0.1-8mm, granularity is 0.1-3mm is respectively: 25%, 30%, 10%, 20%, 15%, or 35%, 25%, 10%, 17%, 13%, or 45%, 20%, 5%, 15%, 15%.
Above-mentioned fine powder can be replaced by the fine powder that comprises the fine and close fused corundom fine powder of granularity≤180 object, granularity≤180 object plate diamond spar fine powder, mullite fine powder, granularity≤180 object andaluzite fine powder, andaluzite-sillimanite complex slag, carbide fine powder, zirconium silicate fine powder and brown corundum fine powder.
In a fine powder, the weight percent of the fine and close fused corundom fine powder of granularity≤180 object, granularity≤180 object plate diamond spar fine powder, mullite fine powder, granularity≤180 object andaluzite fine powder, andaluzite-sillimanite complex slag, carbide fine powder, zirconium silicate fine powder and brown corundum fine powder is respectively: 16%, 28%, 12%, 10%, 7%, 10%, 10%, 7%, or 28%, 16%, 12%, 10%, 7%, 10%, 10%, 7%, or 20%, 18%, 13%, 11%, 7%, 11%, 11%, 9%.
Except above preferred embodiment, the present invention also has other embodiment, and those skilled in the art can make according to the present invention various changes and distortion, only otherwise depart from spirit of the present invention, all should belong to the defined scope of claims of the present invention.
Claims (9)
1. anti-thermal shock low bulk andaluzite mould material, is characterized in that: the mass percent that comprises following component and each component is:
2. anti-thermal shock low bulk andaluzite mould material according to claim 1, is characterized in that: mould material is comprised of aggregate, fine powder, micro mist, composite additive, bonding agent and heat-resistant steel fiber.
3. anti-thermal shock low bulk andaluzite mould material according to claim 2, is characterized in that: a aggregate comprises that the mass percent of following component and each component is:
4. anti-thermal shock low bulk andaluzite mould material according to claim 2, is characterized in that: a aggregate comprises that the mass percent of following component and each component is:
5. according to the anti-thermal shock low bulk andaluzite mould material described in claim 3 or 4, it is characterized in that: a fine powder comprises that the mass percent of following component and each component is:
6. according to the anti-thermal shock low bulk andaluzite mould material described in claim 3 or 4, it is characterized in that: a fine powder comprises that the mass percent of following component and each component is:
7. according to the arbitrary described anti-thermal shock low bulk andaluzite mould material of claim 1 to 4, it is characterized in that: described micro mist is the combination of SiO 2 superfine powder and activated alumina super-fine powder, or institute's micro mist is the combination of SiO 2 superfine powder, activated alumina super-fine powder and modification mullite miropowder.
8. according to the arbitrary described anti-thermal shock low bulk andaluzite mould material of claim 1 to 4, it is characterized in that: described composite additive is the combination of tripoly phosphate sodium STPP and explosion-proof fiber, or, described composite additive is the combination of Sodium hexametaphosphate 99 and explosion-proof fiber, or described composite additive is the combination of tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 and explosion-proof fiber.
9. according to the arbitrary described anti-thermal shock low bulk andaluzite mould material of claim 1 to 4, it is characterized in that: described bonding agent is the combination of high-alumina cement and pure calcium aluminate cement.
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| CN201310559838.XA CN103664205B (en) | 2013-11-12 | 2013-11-12 | Thermal shock-resistant low-expansion andalusite castable |
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| CN201310559838.XA CN103664205B (en) | 2013-11-12 | 2013-11-12 | Thermal shock-resistant low-expansion andalusite castable |
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| CN103664205B CN103664205B (en) | 2015-05-27 |
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Cited By (10)
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| CN104030695A (en) * | 2014-05-21 | 2014-09-10 | 长兴国盛耐火材料有限公司 | Hanging brick at top of hot kiln hood |
| CN104030696A (en) * | 2014-05-21 | 2014-09-10 | 长兴国盛耐火材料有限公司 | Kiln hood top hanger brick |
| CN104163643A (en) * | 2014-07-31 | 2014-11-26 | 宜兴市中环耐火材料有限公司 | High-performance anti-knock castable for circulating fluidized beds and preparation method thereof |
| 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 |
| US20170073275A1 (en) * | 2014-10-23 | 2017-03-16 | Ashapura Minechem Ltd. | Composites of sintered Mullite reinforced corundum granules and method for its preparation |
| CN106747525A (en) * | 2017-02-17 | 2017-05-31 | 北京兰海金诚耐火材料有限责任公司 | A kind of kilneye high-performance composite refractory |
| CN108530042A (en) * | 2018-06-08 | 2018-09-14 | 郑州凯翔耐火材料有限公司 | A kind of firing highly heatproof and shockproof bauxite brick and its production technology |
| CN110028328A (en) * | 2019-05-09 | 2019-07-19 | 山东鲁铭高温材料股份有限公司 | Lime rotary kiln lining casting material and preparation method thereof |
| CN111732422A (en) * | 2020-05-29 | 2020-10-02 | 郑州安耐克实业有限公司 | Electric furnace roof prefabricated part with strong thermal shock resistance and preparation process thereof |
| US11078119B2 (en) | 2014-10-23 | 2021-08-03 | Ashapura Minechem Ltd. | Composites of sintered mullite reinforced corundum granules and method for its preparation |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104030695A (en) * | 2014-05-21 | 2014-09-10 | 长兴国盛耐火材料有限公司 | Hanging brick at top of hot kiln hood |
| CN104030696A (en) * | 2014-05-21 | 2014-09-10 | 长兴国盛耐火材料有限公司 | Kiln hood top hanger brick |
| CN104163643A (en) * | 2014-07-31 | 2014-11-26 | 宜兴市中环耐火材料有限公司 | High-performance anti-knock castable for circulating fluidized beds and preparation method thereof |
| CN104163643B (en) * | 2014-07-31 | 2015-12-09 | 宜兴市中环耐火材料有限公司 | High-performance circulating fluidized bed antiknock mould material and preparation method thereof |
| US20170073275A1 (en) * | 2014-10-23 | 2017-03-16 | Ashapura Minechem Ltd. | Composites of sintered Mullite reinforced corundum granules and method for its preparation |
| US11078119B2 (en) | 2014-10-23 | 2021-08-03 | Ashapura Minechem Ltd. | Composites of sintered mullite reinforced corundum granules and method for its preparation |
| 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 |
| CN106747525A (en) * | 2017-02-17 | 2017-05-31 | 北京兰海金诚耐火材料有限责任公司 | A kind of kilneye high-performance composite refractory |
| CN108530042A (en) * | 2018-06-08 | 2018-09-14 | 郑州凯翔耐火材料有限公司 | A kind of firing highly heatproof and shockproof bauxite brick and its production technology |
| CN110028328A (en) * | 2019-05-09 | 2019-07-19 | 山东鲁铭高温材料股份有限公司 | Lime rotary kiln lining casting material and preparation method thereof |
| CN111732422A (en) * | 2020-05-29 | 2020-10-02 | 郑州安耐克实业有限公司 | Electric furnace roof prefabricated part with strong thermal shock resistance and preparation process thereof |
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