CN103804003B - A kind of catalytic cracking unit high-strength heat-insulating wear-resistant castable - Google Patents
A kind of catalytic cracking unit high-strength heat-insulating wear-resistant castable Download PDFInfo
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- CN103804003B CN103804003B CN201410060978.7A CN201410060978A CN103804003B CN 103804003 B CN103804003 B CN 103804003B CN 201410060978 A CN201410060978 A CN 201410060978A CN 103804003 B CN103804003 B CN 103804003B
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Abstract
The invention discloses catalytic cracking unit high-strength heat-insulating wear-resistant castable, including following weight percent composition: granularity 7～1mm bulk perlite 25～46%；Granularity 5～1mm haydite 5～20%；220 mesh one-level alumina 3～18%；220 mesh vitreous silicas 4～8%；Silicon ash 3～8%；Floating bead 5～15%；CA 65P cement 15～30%；Said components percentage by weight sum is 100%；On the basis of the weight sum of said components, additional: polycarboxylic acids 0.1～0.15%, add water 3～3.5wt% during construction.The high-strength heat-insulating wear-resistant castable advantage of the present invention is that mechanical strength is high, wearability is good, Linear change rate is little, thermal conductivity factor is low, there is 8～9 years superpower service life and energy-saving effect, can be according to the demand of petrochemical plant, by using the castable of different thermal conductivity factor, the outer temperature of housing is made arbitrarily to regulate in 80～120 DEG C or 140～170 DEG C.
Description
Technical field
The present invention relates to a kind of catalytic cracking unit high-strength heat-insulating wear-resistant castable, belong to Inorganic Non-metallic Materials subject
Fire resisting material field.
Background technology
Catalytic cracking unit is that the installing of most important PETROLEUM PROCESSING is standby, reactor (settler) in catalytic cracking unit,
The housings such as regenerator (referred to as two devices) typically use hexsteel double-layer wear-resistant lining or heat insulation resistance to without hexsteel Stainless-steel fibre
Mill dual-layer lining, reactor temperature about 550 DEG C, temperature about 800 DEG C in regenerator.Hexsteel heat insulation and wear resistance bilayer is had to serve as a contrast
In be made up of cylindricality anchor studs, end plate, hexsteel, insulated lining, wear resistance lining, when the temperature is changed, hexsteel swell increment is relatively
The tension that big generation is bigger, easily makes lining bulge or formation take off seam.The dual-layer lining of heat insulation and wear resistance without hexsteel is justified by side pulling type
Ring anchoring dowel, insulated lining and wear resistance lining composition.Because the poor performance such as wearing layer and the density of thermal insulation layer, the coefficient of expansion
Different, along with the increased frequency opened, stop work, wearing layer and thermal insulation layer can be easily separated peeling.Therefore, use density and the coefficient of expansion equal
The single-layer lining of one is present main trend, and along with the development of technology of catalytic cracking production technology and the need of energy efficiency
, mechanical strength is high, and anti-wear performance is good, thermal conductivity factor is low, the insulated lining material of length in service life become in the urgent need to material
Material.
Summary of the invention
The technical problem to be solved, is to provide a kind of catalytic cracking unit high-strength heat-insulating wear-resistant castable,
It is high that it has mechanical strength, and anti-wear performance is good, and thermal conductivity factor is low, the advantage of length in service life.
For solving above-mentioned technical problem, the technical solution used in the present invention is as follows:
A kind of catalytic cracking unit high-strength heat-insulating wear-resistant castable, it includes the component of following percentage by weight:
CA-60 be in the new standard of GB201-2000 a kind of alumina content of regulation 60～the aluminate cement of 68%.?
Before China not yet develops pure calcium aluminate cement, having user to want to obtain the refractory concrete of relatively excellent fire resistance energy, this just releases
A kind of low calcium high alumina content Al2O3 about 65% refractory cement.It is referred to as alumina cement 65 according to alumina content and makes
Order professional standard JC236.High-strength high-alumina cement 65(CA-65) come out in nineteen ninety-five, this high-strength high-alumina cement 65 main
Ore deposit be mutually CA2, CA-65 have two classes, a class be use industrial alumina powder and selected lime stone be raw material make belong to pure
Calcium aluminate performance CA-65P, its main mine is CA mutually, and another kind of employing high-quality natural bauxite is that raw material is made with lime stone
Aluminate cement, high-strength CA-65H, specify that two classes all should be classified as CA-60 shelves by the new standard of GB201-2000.
Said components percentage by weight sum is 100%；
On the basis of the weight sum of said components, additional:
Polycarboxylic acids 0.1～0.15%；
Water 10～15%.
The method preparing above-mentioned catalytic cracking unit high-strength heat-insulating wear-resistant castable, by the granularity 7～1mm block of formula ratio
Shape perlite, granularity 5～1mm haydite, 220 mesh one-level alumina, 220 mesh vitreous silicas, silicon ash, floating bead, CA-65P cement and poly-
Carboxylic acid mixes, uniform through strength mixed grind, is prepared as catalytic cracking unit high-strength heat-insulating wear-resistant castable.
The using method of above-mentioned catalytic cracking unit high-strength heat-insulating wear-resistant castable, amount of water 3～3.5wt% during construction,
Form removal after the complete maintenance of casting and constructing about 16 hours, then natural drying 72 hours, 120 DEG C are toasted 48 hours, the most slowly heat up
Temperature to work.
Wherein, described slowly intensification is for heating up less than 20 DEG C per hour.
Beneficial effect: the invention reside in material component design, raw material mainly have block perlite, haydite, floating bead, alumina,
Quartz, silicon ashes etc., use aluminous cement to combine, additional water reducer polycarboxylic acids.Present invention have the advantage that
(1) light porous, thermal conductivity is low, chemical stability is good block perlite and light weight, shell is hard, intensity is high and internal
The haydite of many honeycomb holes is that primary raw material advantageously reduces the bulk density of material, reduces the heat conductivility of material, increase material
Heat insulation effect；
(2) light weight, high-strength, wear-resisting floating bead are conducive to improving the intensity of material, and the body reducing material is close, keep line change
Little；
(3) alumina has higher intensity, wearability and corrosion resistance；
(4) low-expansion coefficient vitreous silica not only contributes to reduce the heat expansion of castable, and because of vitreous silica particle
Castable is made to create micro-crack when jump in temperature with the difference of matrix phase thermal coefficient of expansion, owing to low-thermal-expansion is with a large amount of
Microcrack evolution equation double mechanism, the thermal shock resistance of castable is excellent, overcomes two device lining thermal shock strippings in catalytic cracking unit
The difficult problem fallen, improves the service life of lining；
(5) silicon ash have prevent isolation, bleeding effect, be conducive to improve castable mobility, reduce water consumption；
(6) using polycarboxylic acids is water reducer, the addition of the water in minimizing construction, and beneficially castable baking is dried.
The high-strength heat-insulating wear-resistant castable advantage of the present invention is that mechanical strength is high, wearability is good, burn after line change little, heat conduction
Coefficient is low.There is superpower service life (8～9 years, like product about 5～7 years service life) and energy-saving effect (can be according to stone
Change the demand of factory, by using the castable of different thermal conductivity factor, make the outer temperature of housing in 80～120 DEG C or 140～170 DEG C
Arbitrarily regulation).
Detailed description of the invention
According to following embodiment, the present invention be may be better understood.But, as it will be easily appreciated by one skilled in the art that reality
Execute the content described by example and be merely to illustrate the present invention, and should be also without limitation on basis described in detail in claims
Invention.
A kind of catalytic cracking unit high-strength heat-insulating wear-resistant castable, it includes the component of following percentage by weight:
Said components percentage by weight sum is 100%；
On the basis of the weight sum of said components, additional:
Polycarboxylic acids 0.1～0.15%；
Water 10～15%.
The method preparing above-mentioned catalytic cracking unit high-strength heat-insulating wear-resistant castable, by the granularity 7～1mm block of formula ratio
Shape perlite, granularity 5～1mm haydite, 220 mesh one-level alumina, 220 mesh vitreous silicas, silicon ash, floating bead, CA-65P cement and poly-
Carboxylic acid mixes, uniform through strength mixed grind, is prepared as catalytic cracking unit high-strength heat-insulating wear-resistant castable.
The using method of above-mentioned catalytic cracking unit high-strength heat-insulating wear-resistant castable, amount of water 10～15wt% during construction,
Form removal after the complete maintenance of casting and constructing about 16 hours, then natural drying 72 hours, 120 DEG C are toasted 48 hours, the most slowly heat up
Temperature to work.Wherein, described slowly intensification is for heating up less than 20 DEG C per hour.
Table 1 lists catalytic cracking unit high-strength heat-insulating wear-resistant castable embodiment 1, embodiment 2, the formula of embodiment 3
And performance indications, and and petrochemical industry unshape refractory national standard contrast.
As can be seen from Table 1, comparing with the insulating and wearing-resistant lining of GB, embodiment 1, embodiment 2, embodiment 3 are the highest
It is significantly higher than GB in the C3 level of national standard, C2 level, C1 level, especially intensity, compressive resistance 25.8MPa of embodiment 1, real
The compressive resistance executing example 2 is 37.2MPa, and the compressive resistance of embodiment 3 is 51.6MPa, respectively than the resistance to pressure of GB C3 level
Degree (20MPa), the compressive resistance (30MPa) of GB level C2, the compressive resistance (40MPa) of GB C1 level exceed about 25%, and anti-folding is strong
Degree is the most generally better than corresponding GB index.Therefore, the insulating and wearing-resistant lining of the present invention is belonging to high-strength heat-insulating wear-resisting type lining.
Owing to the catalytic cracking unit high-strength heat-insulating wear-resistant castable of the present invention has the highest mechanical property, and possess good resisting
Thermal shock resistance and relatively low Linear change rate so that the anti-peel-ability of heat insulation and wear resistance castable lining is strong especially, and the life-span of use is at least
Like product (the similar about 5～7 years service life of product meeting GB) can be significantly higher than more than 8 years.
Table 1 the catalytic cracking unit example of high-strength heat-insulating wear-resistant castable and performance
Claims (1)
1. a catalytic cracking unit high-strength heat-insulating wear-resistant castable, it is characterised in that it is by the group of following percentage by weight
It is grouped into:
Said components percentage by weight sum is 100%；
On the basis of the weight sum of said components, additional:
Polycarboxylic acids 0.1～0.15%；
Water 10～15%；
The using method of above-mentioned catalytic cracking unit high-strength heat-insulating wear-resistant castable is: amount of water 3～3.5wt% during construction,
Form removal after the complete maintenance of casting and constructing 16 hours, then natural drying 72 hours, 120 DEG C are toasted 48 hours, are then to slowly warm up to
The temperature of work；
Described slowly heats up as heating up less than 20 DEG C per hour.
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| CN201410060978.7A CN103804003B (en) | 2014-02-24 | 2014-02-24 | A kind of catalytic cracking unit high-strength heat-insulating wear-resistant castable |
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| CN103804003B true CN103804003B (en) | 2016-08-24 |
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| CN110872192A (en) * | 2018-09-03 | 2020-03-10 | 上海梅山钢铁股份有限公司 | Nanometer coating for permanent layer of torpedo ladle and preparation method thereof |
| CN113185311A (en) * | 2021-05-12 | 2021-07-30 | 泰兴市恒信特种耐火材料有限公司 | Aluminum-silicon castable with aggregate proportion adjusted and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101134336A (en) * | 2007-09-30 | 2008-03-05 | 武汉科技大学 | Fire door lining brick of coke oven and its manufacturing method |
| CN101880170A (en) * | 2010-05-24 | 2010-11-10 | 北京通达耐火技术股份有限公司 | Preparation method of low-density low-thermal conductivity wet spray heat insulating material |
| CN102674851A (en) * | 2012-04-25 | 2012-09-19 | 大连金州金鞍耐火材料有限公司 | Quick-drying and repairing refractory material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013184230A1 (en) * | 2012-06-06 | 2013-12-12 | Vesuvius Crucible Company | High temperature non-wetting refractory additive system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101134336A (en) * | 2007-09-30 | 2008-03-05 | 武汉科技大学 | Fire door lining brick of coke oven and its manufacturing method |
| CN101880170A (en) * | 2010-05-24 | 2010-11-10 | 北京通达耐火技术股份有限公司 | Preparation method of low-density low-thermal conductivity wet spray heat insulating material |
| CN102674851A (en) * | 2012-04-25 | 2012-09-19 | 大连金州金鞍耐火材料有限公司 | Quick-drying and repairing refractory material |
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