CN103819165B - A kind of CFB boiler high temperature inorganic surface abrasion resistance coating and preparation method thereof - Google Patents
A kind of CFB boiler high temperature inorganic surface abrasion resistance coating and preparation method thereof Download PDFInfo
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- CN103819165B CN103819165B CN201310659106.8A CN201310659106A CN103819165B CN 103819165 B CN103819165 B CN 103819165B CN 201310659106 A CN201310659106 A CN 201310659106A CN 103819165 B CN103819165 B CN 103819165B
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Abstract
The present invention provide a kind of can within the temperature range of 750 DEG C 1100 DEG C inorganic surfaces wear-resistant paint that high-strength bonding and wear-resisting effect are provided and preparation method thereof.This coating is made up of A material and B material, and A material is for compounding liquid phase bonding agent such as sodium silicate, lithium silicate and permeation-promoter；B material is the special ceramics sintering aid composition of the synthetic grey and a small amount of with Alumina, corundum aggregate and powder, cement, silicon.By 100 parts of B material during use: 15 70 parts of A expect mix and blend, it is applied in the position needing to repair, along with the intensification of boiler runs, within the temperature range of 750 1100 DEG C, realize ceramic post sintering, thus reach good consistency, hardness and the high bond strength with furnace wall basal plane.The present invention can realize the advantage of low-temp ceramics sintering except having, and also has and repairs basal body binding force by force, adhesive force is big, does not warps, does not ruptures, does not peels off, wear-resistant grade for technical characterstic.
Description
Art:
The present invention relates to a kind of resistant to elevated temperatures CFB boiler inorganic surfaces wear-resistant paint and preparation method thereof, it is characterised in that can be
Within the temperature range of 750 DEG C-1100 DEG C, the furnace wall matrix cohered is provided the wear-resistant protection effect of high intensity.
Technical background:
CFBB (abbreviation CFB boiler) is that the one introduced from the U.S. seventies in last century can realize gangue etc.
Low-grade coal clean and effective burning fire power electricity generation boiler, its principle is that the low-grade coals such as gangue are fluidization in wind-force effect and circulate combustion
Burn, be simultaneously introduced limestone, during burning, realize desulfurization.This boiler compares and meets China's coal resource situation, obtains
Developing faster, current nationwide CFB boiler has more than 2000 platforms, and also this in 12 development plans of country
Electricity generation boiler is as giving priority to field.But this large-scale electricity generation boiler there is also many not enough in actual motion, one of them
It is owing to coal gangue particle hardness is higher, under higher flow velocity, furnace wall is formed and strongly washes away, make the wear problem ten of furnace wall
Divide serious, need frequent blowing out to repair.Currently used more material for repairing is the plastic refractory (Chinese patent of corundum system
CN101088963, CN101428997, CN102134164A), this moldable density is big, and hardness is high, and anti-wear performance is excellent.
But it is relatively low with the bond strength of furnace wall matrix, often there is the situations such as cracking comes off, affect the stable operation of boiler.This
Bright high temperature resistant inorganic surface abrasion resistance coating can make up this defect, its can in target temperature range (750-1100 DEG C) with
Repaired furnace wall matrix congruent melting sintering and high-strength and stable wear-resisting effect is provided, improve CFB boiler furnace wall at high temperature
Wear-resisting intensity, improves the repairing level of CFB boiler, extends the repairing cycle, improves running quality and economical operation benefit, simultaneously
Can be used for the wear-resisting repairing work in the case of some other similar temperature.
Summary of the invention:
Patent of the present invention the technical scheme is that
The high temperature inorganic surface abrasion resistance coating that this patent is provided mainly is made up of A material and B material, and wherein B material is powder, and A expects
For sizing material, powder composition is as follows: Alumina aggregate and Alumina powder (0-70%), corundum aggregate and corundum powder (0-40%), silicon
Ash (0-10%), perhafnate cement (CA70 or CA50) (0-12%), aluminum phosphate (0-10%), alumina powder (0-6%)
For main binding component, additional a small amount of inorganic enhancing and sintering aid such as sodium metaaluminate, nickel oxide, ferrum oxide, cobalt oxide, boron
Sand, Firebrake ZB, sodium tungstate, zirconium oxide, copper oxide, zinc oxide etc.；Wherein, sintering aid is sodium tungstate, Firebrake ZB, contains
Borosilicate etc.；A material consists of: press certain for 2.3-3.3 sodium silicate and modulus at the lithium silicate of 0.25-2.5 with modulus
Ratio mix homogeneously is composited transparency liquid.Meanwhile, one or both in addition sodium citrate, ethanol are as co-penetrant.
Their mol ratio is 1: 2.5～5.5: 0.05～0.1.Inorganic surfaces wear-resistant paint used is expected by 100 parts of B: 15-70 part
A material is formulated.
The high temperature inorganic surface abrasion resistance coating using method that this patent is researched and developed is: wall matrix to be repaired carries out the clear of routine
After ash processes, by the coating material of mixing and stirring on furnace wall, compacting, after its substantially dry (about 30 minutes)
Complete to repair.Can repeatedly smear according to surface abrasion degree, but maximum gauge is at below 4cm.
Compared with prior art have the advantage that:
Compared with prior art, the invention have the advantages that
1. the bond strength of surface abrasion resistance coating and furnace wall matrix is greatly improved: that commonly uses in CFB boiler is repaired at present is high temperature resistant resistance to
Mill material for repairing is relatively low with furnace wall substrate combinating strength, along with the intensification operation of boiler after repairing, easily occur warping, ftracture,
The situations such as peeling, thus limit the performance of its good wear performance, the most even cause important security incident.The present invention
Surface abrasion resistance coating overcome this defect, co-penetrant in its dispensing promotes coating to furnace wall base in work progress
The infiltration of body, along with the intensification of boiler runs, lithium silicate and sodium silicate provide between furnace wall matrix and inorganic powder
High-strength cementation, makes whole coating system and furnace wall matrix realize ceramic post sintering, even fuses into one with furnace wall, and firm
The inorganic powders such as jade, Alumina play raising coating hardness, wear-resistant effect, and all these effects combine and reach this
The repairing effect improving CFB boiler fire-resistant abrasion-proof high bond strength of invention.The coating of the current present invention and alumina firebrick
Cohesive body through 900 DEG C sinter after, after tested, rupture strength has reached 12.0-21.0MPa, and tensile strength reaches
4.5-5.6MPa.And the adhesion strength of conventional fire-resistant abrasion-proof material for repairing and furnace wall matrix material typically only has 1.5-2.0MPa
Left and right.The surface abrasion resistance coating of the present invention can be inherently eliminated opening of surface abrasion resistance coating in CFB boiler running
Split the situations such as peeling, security and stability and economic benefit that CFB boiler run are greatly improved；
2. easy construction, the high temperature inorganic surface abrasion resistance coating application of the present invention is convenient, and its A material and B material are prefabricated material, during use
Only B material and A need to be expected the ratio mixing and stirring according to 100: 15-70, spread upon on the bonding basal plane cleared up in advance,
Thickness 1.0cm-3.5cm, will be compacted by adhesive surface, and solidification is dried；When repairing for CFB boiler fire-resistant abrasion-proof
During operation, after furnace wall only need to carry out conventional deashing process, it is compacted the coating material being stirred on the basal plane of furnace wall repair
?；
3. technique simplifies, and is not required to pre-baker or is individually heated to high temperature and is sintered.Owing to the surface abrasion resistance coating of the present invention is at CFB
There is ceramic post sintering effect between the operating temperature of boiler 850 DEG C-1050 DEG C, therefore be not required to independent baker to specific temperature after repairing
Degree is sintered, and can heat up with stove, arrives naturally-occurring agglomeration after the operating temperature of boiler, is not required to baker, fall
Low CFB boiler repairs cost.
Accompanying drawing illustrates:
Fig. 1 is inorganic surfaces wear-resistant paint of the present invention at CFB boiler to be repaired and on-the-spot smears the situation of pasting；
Fig. 2 is with 10 months later situation (locally) (tables of boiler operatiopn after inorganic surfaces wear-resistant paint of the present invention is pasted
Face attachment is intact, without warping, ftracture, peeling etc.)；
Fig. 3 is that the situation after inorganic surfaces wear-resistant paint and the alumina firebrick of the present invention sinters (is combined closely, it is achieved congruent melting is burnt
Knot).
Embodiment: following example are merely to illustrate the using method of the present invention, and the present invention is not limited to following example.
Embodiment 1
By industrial alcohol that modulus is 2.3 sodium silicates and lithium silicate that modulus is 2.5 and 40% mass fraction by 20: 75: 5
Ratio mix homogeneously, composition A material；By Alumina aggregate (0-0.5), 80 grades of Alumina powders (200 mesh), Brown Alundum aggregate (0-1),
Brown Alundum powder (200 mesh), Brown Alundum powder (325 mesh), powder aluminum phosphate, zinc oxide are according to 20: 20: 20: 10:
The weight ratio mixing of 10: 5: 5, and stir, expect as B, A, B are expected the ratio mix and blend according to 100: 42
Uniformly, smear and be bonded in clean refractory material reference block, compacting solidification in the mould of 40 × 40 × 160mm, the demoulding,
Strength at normal temperature after 900 DEG C of sintering is 12.03MPa, and tensile strength is 4.7MPa.
Embodiment 2
By sodium citrate aqueous solution that modulus is 2.0 sodium silicates and lithium silicate that modulus is 2.0 and 0.1% mass fraction by 13
: the ratio mix homogeneously of 72: 15, composition A material；By Brown Alundum aggregate (1-3), 80 grades of Alumina aggregates (0-1), 80 grades
Alumina powder (200 mesh), Brown Alundum powder (325 mesh), perhafnate cement CA50, powder aluminum phosphate are according to 15: 15:
The weight ratio mixing of 34: 24: 9: 3, stirs, expects as B, is mixed according to the ratio of 100: 42 by A, B material and stirs
Mix uniformly, smear and be bonded in clean refractory material reference block, compacting solidification in the mould of 40 × 40 × 160mm, the demoulding,
Strength at normal temperature after 900 DEG C of sintering is 15.42MPa, and tensile strength is 5.2MPa.
Embodiment 3
By sodium citrate aqueous solution that modulus is 2.3 sodium silicates and lithium silicate that modulus is 2.0 and 0.1% mass fraction by 13
: the ratio mix homogeneously of 61: 25, composition A material；By Brown Alundum aggregate (0-1), 80 grades of Alumina powders (220 mesh), height
Aluminate cement CA50, silicon ash, powder aluminum phosphate, Powder Oxidation copper, 800 DEG C of roastings sodium tungstate powder of 2 hours, six inclined
Sodium phosphate is according to 24: 36: 20: the weight ratio mixing of 5: 6: 6: 2.5: 0.5, stirs, expects as B, by A, B
Expect the ratio mixing and stirring according to 100: 35, spread upon on clean refractory brick that compacting, after 900 DEG C sinter, is coated with
Material is very firm with the bonding of refractory brick, and conventional method can not be separated, and time under being struck with iron hammer, refractory brick is knocked off, and sees
Accompanying drawing 3.
Embodiment 4
By sodium citrate aqueous solution that modulus is 2.3 sodium silicates and lithium silicate that modulus is 2.8 and 0.1% mass fraction by 13
: the ratio mix homogeneously of 61: 25, composition A material；By Brown Alundum aggregate (3-5), Brown Alundum aggregate (1-3), Brown Alundum bone
Material (0.5-1), Brown Alundum powder (200 mesh), 80 grades of Alumina powders (0-200 mesh), perhafnate cement CA50, silicon ash,
Firebrake ZB, copper oxide, sodium tungstate, sodium tripolyphosphate are according to 10: 10: 10: 18: 18: 10: 5.5: 6: 6: 6: 0.5
Weight ratio mixing, stir, as B expect, by A, B material according to 100: 40 ratio mixing and stirring, spread upon
On clean refractory brick, compacting, after 900 DEG C sinter, coating material is very firm with the bonding of refractory brick, and conventional method can not
Being separated, time under being struck with iron hammer, refractory brick is knocked off.
Embodiment 5
By sodium citrate aqueous solution that modulus is 2.3 sodium silicates and lithium silicate that modulus is 2.8 and 0.1% mass fraction by 13
: the ratio mix homogeneously of 61: 26, composition A material；By 80 grades of Alumina powders (220 mesh), Brown Alundum powder (325 mesh),
Perhafnate cement CA50, silicon ash, Powder Oxidation aluminum, copper oxide, zirconium oxide, sodium hexameta phosphate are according to 36.5: 37: 6: 6
: the weight ratio mixing of 6: 6: 2: 0.5, stir, expect as B, A, B material is mixed according to the ratio of 100: 50
Stir, spread upon on clean refractory brick, compacting, after 900 DEG C sinter, coating is very firm with the bonding of refractory brick,
Conventional method can not be separated, and time under being struck with iron hammer, refractory brick is knocked off.
Embodiment 6
By sodium citrate aqueous solution that modulus is 2.3 sodium silicates and lithium silicate that modulus is 2.8 and 0.1% mass fraction by 13
: the ratio mix homogeneously of 61: 25, composition A material；By 80 grades of Alumina powders (220 mesh), perhafnate cement CA50, silicon
Ash, powder aluminum phosphate, sodium metaaluminate, sodium hexameta phosphate are according to 66.5: 21: 5: the weight ratio mixing of 6: 1: 0.5, stirring
Uniformly, expect as B, by A, B material according to the ratio mixing and stirring of 100: 60, be coated withWarp
After 900 DEG C of sintering, coating is very firm with the bonding of refractory brick, and conventional method can not be separated, resistance to time under being struck with iron hammer
Firebrick is knocked off.
Claims (5)
1. a high temperature inorganic surface abrasion resistance coating, it is characterized in that being made up of two kinds of material of A, B, A material is the mixing liquid sizing material that waterglass forms with co-penetrant, and the inorganic powder that B material is Alumina, corundum is main composition, during use, A material and B are coated in repaired position after expecting mixing and stirring；
In described A material, the weight ratio of sodium silicate, lithium silicate and co-penetrant is at (0-70) %: (0-30) %: between (0.1-5) %；The weight ratio of each component adds up to absolutely；
In described B material, the proportioning of each powder is: Alumina aggregate (0-20) %, Alumina powder (0-50) %, corundum aggregate (0-20) %, corundum powder (0-20) %, perhafnate cement (0-10) %, silicon ash (0-10) %, aluminum phosphate (0-10) %, sodium hexameta phosphate (0-0.5) %, the proportioning of each powder adds up to absolutely；The inorganic sintered auxiliary agent of additional (0-8) %.
High temperature inorganic surface abrasion resistance coating the most according to claim 1, it is characterised in that the weight ratio of B material and A material is 100: 15-70.
High temperature inorganic surface abrasion resistance coating the most according to claim 1, it is characterised in that co-penetrant is the material with surface activity.
4. according to the high temperature inorganic surface abrasion resistance coating described in claim 1 or 3, it is characterised in that co-penetrant is sodium citrate, ethanol, organosilicon.
High temperature inorganic surface abrasion resistance coating the most according to claim 1, it is characterised in that described inorganic sintered auxiliary agent is the complex of one or more of sodium metaaluminate, nickel oxide, ferrum oxide, cobalt oxide, sodium tungstate, Firebrake ZB, Borax, copper oxide, zirconium oxide, zinc oxide inorganic oxide.
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| CN104529373A (en) * | 2014-12-15 | 2015-04-22 | 河南勃达微波设备有限责任公司 | High-temperature-resisting anti-corrosion crucible |
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| CN106187017A (en) * | 2015-05-08 | 2016-12-07 | 刘福源 | A kind of for making the compound of high-abrasive material and making the method for this high-abrasive material |
| CN105152630B (en) * | 2015-08-28 | 2017-03-22 | 邰召山 | Ceramic paint and application thereof |
| CN105294119B (en) * | 2015-09-08 | 2017-09-29 | 武汉理工大学 | It is a kind of available for CFBB low-temperature sintering abrasion-proof and refractory patching material and preparation method thereof |
| CN106145913B (en) * | 2016-07-05 | 2018-12-28 | 淄博意蓝表面工程有限公司 | Circulating fluidized bed boiler fire resisting wear-preventing paint and preparation method thereof |
| CN107385161A (en) * | 2017-07-26 | 2017-11-24 | 江苏苏丰机械科技有限公司 | A kind of new material Major-diameter annealing machine |
| CN109422529B (en) * | 2017-08-24 | 2020-06-09 | 江南大学 | High-strength CFB boiler high-aluminum refractory plastic |
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| CN102134164A (en) * | 2010-01-21 | 2011-07-27 | 宜兴市国强炉业有限公司 | High-temperature wear-resistant repairing coating and preparation method thereof |
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| CN87100343A (en) * | 1987-01-17 | 1988-04-06 | 哈尔滨工业大学 | The manufacture method of fusible pattern plaster mold and coating |
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| CN101428997A (en) * | 2008-12-08 | 2009-05-13 | 林国强 | High temperature abrasion-proof paint and method for producing the same |
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