CN103819165A - High-temperature inorganic surface wear-resistant paint for CFB (circulating fluid bed) boiler and preparation method of high-temperature inorganic surface wear-resistant paint - Google Patents
High-temperature inorganic surface wear-resistant paint for CFB (circulating fluid bed) boiler and preparation method of high-temperature inorganic surface wear-resistant paint Download PDFInfo
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- CN103819165A CN103819165A CN201310659106.8A CN201310659106A CN103819165A CN 103819165 A CN103819165 A CN 103819165A CN 201310659106 A CN201310659106 A CN 201310659106A CN 103819165 A CN103819165 A CN 103819165A
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Abstract
The invention provides inorganic surface wear-resistant paint capable of providing high-strength bonding and wear resistant effects within the temperature range from 750 DEG C to 1100 DEG C, and a preparation method of the inorganic surface wear-resistant paint. The paint comprises a material A and a material B, wherein the material A is a liquid phase binding agent compounded by sodium water glass, lithium water glass, a permeation assistant and the like, and the material B comprises alumina, corundum aggregate and powder, cement, silica fume and a little artificially synthesized special ceramic sintering assistant. When in use, 100 parts of material B and 15-70 parts of material A are mixed and stirred, and the mixture is applied to a part required to be repaired, and ceramic sintering is realized within the temperature range from 750 DEG C to 1100 DEG C with the heating-up operation of the boiler, so that good density, rigidity and high binding strength with a basal plane of a boiler wall are achieved. The paint has the advantages of being capable of realizing the low temperature ceramic sintering, and further has the technical characteristics of strong binding force with a repairing matrix, large adhesion, no upwarp, no rupture, no peeling, wear resistance and the like.
Description
Affiliated technical field:
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 characterized in that in the temperature range of 750 ℃-1100 ℃, providing high-intensity wear-resistant protection effect to the furnace wall matrix being cohered.
Technical background:
Circular fluid bed (being called for short CFB boiler) is that the one of introducing from the U.S. seventies in last century can realize the inferior coal clean and effective burning fire power electricity generation boilers such as coal gangue, its principle is inferior coal fluidisation circulating combustions under wind effect such as coal gangue, add Wingdale simultaneously, in the process of burning, realize desulfurization.This boiler relatively meets China's coal resource situation, is developed faster, and nationwide CFB boiler has more than 2000 platforms at present, and goes back using this electricity generation boiler as giving priority to field in 12 development programs of country.But this large-scale electricity generation boiler also exists many deficiencies in actual motion, one of them is because coal gangue particle hardness is higher, under higher flow velocity, furnace wall is formed and is strongly washed away, and makes the wear problem of furnace wall very serious, needs frequent blowing out to repair.Using more repair material is at present the plastic refractory (Chinese patent CN101088963, CN101428997, CN102134164A) of corundum system, and this moldable density is large, and hardness is high, and wear resisting property is good.But the bonding strength of itself and furnace wall matrix is lower, often there is the situations such as cracking comes off, affect the steady running of boiler.High temperature resistant inorganic surface abrasion resistance coating of the present invention can make up this defect, it can (750-1100 ℃) provide high-strength and stable wear-resisting effect in target temperature range with repaired furnace wall matrix congruent melting sintering, improve CFB boiler wall abrasive wear resistance at high temperature, improve the repairing level of CFB boiler, extend the repairing cycle, improve operating mass and economical operation benefit, simultaneously also can be for the wear-resisting repairing work under some other similar temperature conditions.
Summary of the invention:
The technical scheme that patent of the present invention adopts is:
The high temperature inorganic surfaces wear-resistant paint that this patent provides mainly contains A material and B material composition, wherein B material is powder, A material is sizing material, powder is composed 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%) is main binding component, additional a small amount of inorganic enhancing and sintering aid are as sodium metaaluminate, nickel oxide, ferric oxide, cobalt oxide, borax, zinc borate, sodium wolframate, zirconium white, cupric oxide, zinc oxide etc., wherein, sintering aid be sodium wolframate, zinc borate, containing borosilicate etc., A material consists of: take modulus as 2.3-3.3 sodium silicate and modulus mix by a certain percentage at the lithium silicate of 0.25-2.5 the transparent liquid that is composited.Meanwhile, add one or both in Trisodium Citrate, ethanol 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 surfaces wear-resistant paint using method that this patent is researched and developed is: will carry out wait the wall matrix of repairing after conventional deashing processing, the coating of mixing and stirring is spread upon on furnace wall, compacting, after its substantially dry, (approximately 30 minutes) can complete repairing.Can repeatedly smear according to surface abrasion degree, but maximum ga(u)ge is below 4cm.
Compared with prior art have advantages of:
Compared with prior art, the present invention has the following advantages:
1. significantly improve the bonding strength of surface abrasion resistance coating and furnace wall matrix: current heat resistant and wear resistant repair material and furnace wall substrate combinating strength conventional in CFB boiler is repaired are lower, intensification along with boiler after repairing moves, the situation such as very easily occur warping, ftracture, peel off, thereby limit the performance of its excellent wear energy, sometimes even cause important security incident.Surface abrasion resistance coating of the present invention has overcome this defect, co-penetrant in its batching promotes coating infiltration to furnace wall matrix in construction process, along with the intensification operation of boiler, lithium silicate and sodium silicate provide high-strength cohesive action between furnace wall matrix and inorganic powder, make whole coating system and furnace wall matrix realize ceramic post sintering, even fuse into one with furnace wall, and corundum, the inorganic powders such as alumina play raising coating hardness, wear-resistant effect, all these effects combine and reach the repairing effect of raising CFB boiler fire-resistant abrasion-proof high bond strength of the present invention.The cohesive body of current coating of the present invention and alumina firebrick is after 900 ℃ of sintering, and after tested, folding strength has reached 12.0-21.0MPa, and tensile strength reaches 4.5-5.6MPa.And the cohesive strength of fire-resistant abrasion-proof repair material in the past and furnace wall body material generally only has 1.5-2.0MPa left and right.The cracking that surface abrasion resistance coating of the present invention can fundamentally be eliminated surface abrasion resistance coating in CFB boiler running process such as peels off at the situation, significantly improves security and stability and the economic benefit of CFB boiler operatiopn;
2. easy construction, high temperature inorganic surfaces wear-resistant paint of the present invention easy construction, its A material and B material are prefabricated material, when use, only B material and A need be expected according to the ratio mixing and stirring of 100:15-70, spread upon on the bonding basal plane of cleaning in advance, thickness 1.0cm-3.5cm, by bonded compacting, after curing being dried; When for CFB boiler fire-resistant abrasion-proof repairing work, only furnace wall need be carried out after conventional deashing processing, the coating being stirred is spread upon to compacting on the basal plane of furnace wall and repair;
3. work simplification, does not need pre-baker or is heated to separately high temperature to carry out sintering.Because surface abrasion resistance coating of the present invention, between 850 ℃-1050 ℃ of the working temperatures of CFB boiler, ceramic post sintering effect occurs, therefore do not need independent baker to carry out sintering to specified temp after repairing, can heat up with stove, naturally-occurring nodulizing after the working temperature of arrival boiler, do not need baker, reduce CFB boiler and repair cost.
Accompanying drawing explanation:
Fig. 1 is that inorganic surfaces wear-resistant paint of the present invention is repaired the on-the-spot situation of pasting of smearing at CFB boiler;
Fig. 2 is with 10 months later situations (part) of boiler operatiopn (surface attachment is intact, without warp, ftracture, peel off etc.) after inorganic surfaces wear-resistant paint of the present invention is pasted;
Fig. 3 is the situation (combine closely, realize congruent melting sintering) after inorganic surfaces wear-resistant paint of the present invention and alumina firebrick sintering.
Embodiment: following examples are only for using method of the present invention is described, and the present invention is not limited to following examples.
Embodiment 1
Be that 2.3 sodium silicates and the modulus lithium silicate that is 2.5 and the industrial alcohol of 40% massfraction mix in the ratio of 20:75:5 by modulus, composition A material, by alumina aggregate (0-0.5), 80 grades of alumina powders (200 order), palm fibre corundum aggregate (0-1), brown alundum powder material (200 order), brown alundum powder material (325 order), powder aluminum phosphate, zinc oxide mixes according to the weight ratio of 20:20:20:10:10:5:5, and stir, expect as B, by A, B expects according to the ratio mixing and stirring of 100:42, smear and be bonded in clean refractory materials standard test block, in the mould of 40 × 40 × 160mm, compacting is solidified, the demoulding, strength at normal temperature after 900 ℃ of sintering is 12.03MPa, tensile strength is 4.7MPa.
Embodiment 2
Be that 2.0 sodium silicates and the modulus lithium silicate that is 2.0 and the sodium citrate aqueous solution of 0.1% massfraction mix in the ratio of 13:72:15 by modulus, composition A material, by brown corundum aggregate (1-3), 80 grades of alumina aggregates (0-1), 80 grades of alumina powders (200 order), brown alundum powder material (325 order), perhafnate cement CA50, powder aluminum phosphate mixes according to the weight ratio of 15:15:34:24:9:3, stir, expect as B, by A, B expects according to the ratio mixing and stirring of 100:42, smear and be bonded in clean refractory materials standard test block, in the mould of 40 × 40 × 160mm, compacting is solidified, the demoulding, strength at normal temperature after 900 ℃ of sintering is 15.42MPa, tensile strength is 5.2MPa.
Embodiment 3
Be that 2.3 sodium silicates and the modulus lithium silicate that is 2.0 and the sodium citrate aqueous solution of 0.1% massfraction mix in the ratio of 13:61:25 by modulus, composition A material, by brown corundum aggregate (0-1), 80 grades of alumina powders (220 order), perhafnate cement CA50, silicon ash, powder aluminum phosphate, Powder Oxidation copper, 800 ℃ of roastings sodium wolframate powder of 2 hours, Sodium hexametaphosphate 99 mixes according to the weight ratio of 24:36:20:5:6:6:2.5:0.5, stir, expect as B, by A, B expects according to the ratio mixing and stirring of 100:35, spread upon on clean refractory brick, compacting, after 900 ℃ of sintering, the bonding of coating and refractory brick is very firm, ordinary method can not be separated, being struck lower time refractory brick with iron hammer is knocked off, see accompanying drawing 3.
Embodiment 4
Be that 2.3 sodium silicates and the modulus lithium silicate that is 2.8 and the sodium citrate aqueous solution of 0.1% massfraction mix in the ratio of 13:61:25 by modulus, composition A material, by brown corundum aggregate (3-5), palm fibre corundum aggregate (1-3), palm fibre corundum aggregate (0.5-1), brown alundum powder material (200 order), 80 grades of alumina powders (0-200 order), perhafnate cement CA50, silicon ash, zinc borate, cupric oxide, sodium wolframate, tripoly phosphate sodium STPP mixes according to the weight ratio of 10:10:10:18:18:10:5.5:6:6:6:0.5, stir, expect as B, by A, B expects according to the ratio mixing and stirring of 100:40, spread upon on clean refractory brick, compacting, after 900 ℃ of sintering, the bonding of coating material and refractory brick is very firm, ordinary method can not be separated, being struck lower time refractory brick with iron hammer is knocked off.
Embodiment 5
Be that 2.3 sodium silicates and the modulus lithium silicate that is 2.8 and the sodium citrate aqueous solution of 0.1% massfraction mix in the ratio of 13:61:26 by modulus, composition A material; 80 grades of alumina powders (220 order), brown alundum powder material (325 order), perhafnate cement CA50, silicon ash, Powder Oxidation aluminium, cupric oxide, zirconium white, Sodium hexametaphosphate 99 are mixed according to the weight ratio of 36.5:37:6:6:6:6:2:0.5, stir, expect as B, A, B are expected according to the ratio mixing and stirring of 100:50, spread upon on clean refractory brick, compacting, after 900 ℃ of sintering, the bonding of coating and refractory brick is very firm, ordinary method can not be separated, and is struck lower time refractory brick knocked off with iron hammer.
Embodiment 6
Be that 2.3 sodium silicates and the modulus lithium silicate that is 2.8 and the sodium citrate aqueous solution of 0.1% massfraction mix in the ratio of 13:61:25 by modulus, composition A material; 80 grades of alumina powders (220 order), perhafnate cement CA50, silicon ash, powder aluminum phosphate, sodium metaaluminate, Sodium hexametaphosphate 99 are mixed according to the weight ratio of 66.5:21:5:6:1:0.5, stir, expect as B, A, B are expected according to the ratio mixing and stirring of 100:60, be coated with
after 900 ℃ of sintering, the bonding of coating and refractory brick is very firm, and ordinary method can not be separated, and is struck lower time refractory brick knocked off with iron hammer.
Claims (7)
1. high temperature inorganic surfaces wear-resistant paint and preparation method thereof, it is characterized in that being formed by A, two kinds of material of B, A material is the mixing liquid sizing material of water glass and co-penetrant composition, B material, for alumina, corundum etc. are the inorganic powder of main composition, is coated in repaired position after A material and B material mixing and stirring when use.
2. high temperature inorganic surfaces wear-resistant paint according to claim 1, is characterized in that the weight ratio of sodium silicate, lithium silicate and co-penetrant in A material is at (0-70) %:(0-30) %:(0.1-5) between %.
3. high temperature inorganic surfaces wear-resistant paint according to claim 1, it is characterized in that B material is that corundum powder, alumina powder are main, toughener or the sintering aids such as additional silicon powder, aluminum oxide, zirconium white, cupric oxide, zinc oxide, zinc borate, sodium wolframate, borax.
4. high temperature inorganic surfaces wear-resistant paint according to claim 1, is characterized in that the weight ratio of B material and A material is 100:15-70.
5. co-penetrant according to claim 2, is characterized in that co-penetrant is that Trisodium Citrate, ethanol, organosilicon etc. have surface-active material.
6. B material according to claim 4, the proportioning that it is characterized in that 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 hexametaphosphate 99 (0-0.5) % etc., the inorganic sintered auxiliary agent of additional (0-8) % left and right.
7. the inorganic sintered auxiliary agent as described in right 6 is mainly one or more mixture of the inorganic oxides such as sodium metaaluminate, nickel oxide, ferric oxide, cobalt oxide, sodium wolframate, zinc borate, borax, cupric oxide, zirconium white, zinc oxide.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104725061A (en) * | 2015-03-16 | 2015-06-24 | 通达耐火技术股份有限公司 | Wear-resisting ramming and smearing material for waste heat power generation of cement kiln |
| CN105152630A (en) * | 2015-08-28 | 2015-12-16 | 兆山科技（北京）有限公司 | Ceramic paint and application thereof |
| CN105294119A (en) * | 2015-09-08 | 2016-02-03 | 武汉理工大学 | Low-temperature sintering and wear-resisting fire-resisting patching material for CFBB (Circulating Fluidized Bed Boiler) and preparation method thereof |
| CN106145913A (en) * | 2016-07-05 | 2016-11-23 | 淄博意蓝表面工程有限公司 | Fire-resistant wear-preventing paint of CFBB and preparation method thereof |
| 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 |
| 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 |
| CN107828947A (en) * | 2017-10-25 | 2018-03-23 | 江苏广盛源科技发展有限公司 | A kind of welding annealing device |
| CN109422529A (en) * | 2017-08-24 | 2019-03-05 | 江南大学 | A kind of high intensity CFB boiler high-alumina refractory is moldable |
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| Publication number | Priority date | Publication date | Assignee | Title |
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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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| 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 |
| CN109422529A (en) * | 2017-08-24 | 2019-03-05 | 江南大学 | A kind of high intensity CFB boiler high-alumina refractory is moldable |
| CN107828947A (en) * | 2017-10-25 | 2018-03-23 | 江苏广盛源科技发展有限公司 | A kind of welding annealing device |
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