CN100484897C - Water-proof acid resistant heat resistant light heat insulating casting material and its manufacturing method - Google Patents
Water-proof acid resistant heat resistant light heat insulating casting material and its manufacturing method Download PDFInfo
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Abstract
A water-proof light-weight insulating casting material resisting acid and high temp for the liner of chimney is prepared from the inorganic light aggregate particles resisting acid and high temp, the acid and high temp resistant powder, the acid and high temp resistant adhesive and additive through proportional mixing, stirring, casting in mould for 1-5 days, demoulding, and natural drying and curing. Its advantages are high volume density and strength, light weight and high resistance to water, acid and high temp.
Description
Technical field
The present invention relates to the anticorrosion cracking resistance integral lining that a kind of thermal power plant chimney is used, especially a kind of unsetting acidproof heat-proof lightweight heat-proof of waterproof type mould material that is widely used in thermal power plant's all kinds chimney, the flue the invention still further relates to the manufacture method of this mould material.
Background technology
In the design of power plants chimney stack, adopt free-standing reinforced concrete chimney nearly half a century so far, this traditional reinforced concrete chimney is before the seventies, it is the structural model of continuing to use USSR (Union of Soviet Socialist Republics), promptly by the Steel Concrete urceolus, the liner of 50mm air heat-insulation layer and masonry of cement mortar clay common brick is formed.Since the eighties, domestic generally original air heat-insulation layer being changed into lagging materials such as gas concrete, slag wool, rock wool or perlite productss made thermofin.Though this design heat insulation, reduce and to improve to some extent aspect the thermal stress, antiseptic property is improved little.Since the nineties, begun to adopt acid resistant adhesive mortar to build acid resisting brick by laying bricks or stones in the chimney lining design, and done thermofin with hydrophobic pearlite board, the anticorrosive heat insulating performance of its liner has improvement greatly.Yet, be difficult for fullly because in the past way does not break through traditional pattern of building by laying bricks or stones, the horizontal, vertical seam of masonry (especially perpends), cause the brick structures resistance to air loss bad.In addition, the change tide of lagging material will cause that its thermal conductivity increases, and heat-proof quality descends; Combine factor such as imprecision between the breakage, piece of putting the block insulating layer material of formula setting and the piece and can cause corrosive fume to be easy to penetrate brick structures and thermofin and corrode the wall of the outer-rotor concrete, increase thermal stress and then produce the crack, and make corrosion and crack alternating action.In addition, adopt the method for design of the lined brick of thermofin, brought very big inconvenience also for the construction of chimney.As: transportation, the keeping of multiple material (brick, clay, insulating layer material); Practical problemss such as setting of thermofin (processing of piece and interblock seam) and moisture preventive measure, directly influenced the realization of design effect and index, the working life that also will influence chimney is (though part double-sliding type or inside and outside double teeming formula chimney globality, resistance to air loss improve greatly, but exist that easy generation is reversed, drift, concrete drawing crack, weight concrete scurry slurry and produce cold bridge and the unequal many defectives of inner/outer tube wall thickness, and from total textural three layers structure that is still with Steel Concrete urceolus+thermofin+concrete lining).In recent years, newly-built thermal power plant has generally adopted the above large vol unit of 300MW, and chimney height mostly is 210M, 240M, even up to 270M.In order to improve chimney quality, convenient construction, especially to improve globality, resistance to air loss, the shock resistance of chimney and prolong working life, necessary thermofin and anticorrosion brick structures liner are united two into one, it is strong that i.e. employing has erosion resistance, lightweight that thermal insulation is good, intensity is high or Ultra-Light Material and agglutinate, make (surpassing) lightweight acid-proof heat-insulation concrete lining in cast-in-place mode, make its mechanical property, heat-proof quality, antiseptic property all reach design requirements, really realize design effect and index.As far back as 50 to the sixties, it is interior as thermofin that Europe and Japan wait some countries to adopt a kind of lightweight heat-proof mould material to be used for the burner hearth and the chimney of metallurgy, petrochemical industry.At present, China has also widely applied the lightweight heat-proof mould material in metallurgical and petrochemical industry, has brought into play positive effect, has obtained considerable economic.As: at present domestic once used at positions such as petrochemical industry process furnace and flue linings with the unsetting heat insulating casting material of high-alumina cement as wedding agent.But the intensity of such mould material will reduce after being heated greatly, and also have big defective at aspects such as non-corrosibility, water tolerance, impermeability and frost resistances, can not adapt to the requirement of thermal power plant's chimney stack liner.
In the recent period, Chinese patent CN97112591.0 discloses a kind of, fine aggregate thick by water glass, acid-proof cement, the acidproof potter's clay of sintering and has cooperated the concrete pouring material that forms, its starting material and proportioning following (weight percent):
Water glass 0.8～1.2%
Sodium Silicofluoride 0.13～0.18%
Acid-proof cement 1.36～1.86%
The acidproof potter's clay fine aggregate 1.33～1.90% of sintering
The acidproof potter's clay coarse aggregate 3.06～3.66% of sintering
More than employed starting material require as follows in the prescription: water glass is powdery, technical pure; Acid-proof cement is an aluminate class cement, and label is 525
#～625
#
The technology of concrete batching mould material is as follows: the acidproof potter's clay of choosing different specific weight according to the requirement of chimney corrosion-proof lining proportion, the acidproof potter's clay of sintering is pulverized, by thick, the requirement of fine aggregate grain composition, the accumulative total of controlling each regulation sieve aperture sieve tails over, and makes thick, fine aggregate respectively, in the weighing of cooperation ratio, slightly, fine aggregate mixes back oven dry removing moisture content, add the acid-proof cement of the good proportional of weighing, mix, this is the A component.In cooperate good powdery water glass of ratio weighing and powdery Sodium Silicofluoride, blending to mix together, this is the B component.Before the use, A and B component are mixed, be light-weight high-strength chimney corrosion-proof lining concrete pouring material, add the water stirring during use and get final product.
Find that by analysis there are two aspect mistake and defectives at least in this patented technology:
1, aluminate class cement is not acid-proof cement.The thermotolerance and the sulfate-resistant corrosion of aluminate class cement are better, but because of wherein calcium content is bigger, easily by the sulfuric acid corrosion of various concentration, therefore aluminate class cement are used as acid-proof cement, are the gross error of key concept.
2, it is very disadvantageous adopting broken potter's clay aggregate.Because of agglomerating potter's clay aggregate is a poromerics, become open-cell material after the fragmentation, with material mixing such as cement, water glass after, hole is filled, and not only increased density, and thermal conductivity increases greatly, cause thermal and insulating performance to decline to a great extent, deadweight increases, and is unfavorable to structure design, and construction costs also improves thereupon.
Summary of the invention
The present invention is directed to the problem that prior art exists, actual condition according to the chimney operation, take effective technological measure, by combination and the proportioning of selecting starting material and science rightly, a kind of collection lightweight is provided, heat insulation, acidproof, heat-resisting, high-strength, good integrity, stopping property is strong, water-repellancy is strong, impervious multiple excellent properties such as freeze proof is in the high-strength light mould material of one, another object of the present invention provides the manufacture method of this mould material, so that make integral lining at the scene, substitute and put the formula thermofin and build the formula brick lining by laying bricks or stones, obviously strengthen the globality of chimney lining, resistance to air loss, improve anti-seismic performance, reduce the crack that thermal stress causes, guarantee structural strength, and can reduce the chimney deadweight greatly, reduce the chimney raft treatment capacity, reduce bracket place reinforcing bar density, realize convenient construction, improve labour intensity, improve the economic and social benefits.
To achieve these goals, the present invention is achieved by the following technical programs:
A kind of waterproof type acidproof heat-proof lightweight heat-proof mould material, wherein the weight proportion of each raw material is: haydites of book structure: particle diameter 15～5mm, 0.566; Shale pottery sand: particle diameter 5～0.2mm, 0.425; Glass-cermic powder: 180 orders, 0.404; Fly ash float: 0.121; Zine fluosilicate: 0.130; Ammonium phosphate: 0.014; Water-soluble epoxy resin: 0.02; Sodium-potassium silicate solution, d=1.36～1.4,1.0.
A kind of waterproof type acidproof heat-proof lightweight heat-proof mould material, wherein the weight proportion of each raw material is: leca: particle diameter: 15～5mm, 1.37; Pottery sand particle: particle diameter: 5～0.2mm, 0.68; High-alumina powder clinker: 180 orders, 0.59; Silicon powder:＜5 μ, 0.085; Condensation of aluminum phosphate: 0.105; Sodium Silicofluoride: 0.079; Powdery quick dissolved sodium silicate: 0.645; Water-soluble epoxy resin: 0.02; Water: 1.
A kind of waterproof type acidproof heat-proof lightweight heat-proof mould material, wherein the weight proportion of each raw material is: lytag: particle diameter: 5～12mm, 1.4; Cinder: particle diameter: 5～0.2mm, 0.8; Flyash:＜140 orders, 0.32; Acid resistant porcelain powder:＜160 orders, 0.44; Sodium Silicofluoride: 0.12; Aluminum sulfate salt: 0.03; Oxalic acid: 0.004; Water-soluble epoxy resin: 0.01; Potassium silicate solution: d=1.25～1.6,1; Waterproof water-soluble epoxy resin: 0.02.
The raw material that will meet requirement of the present invention mixes to scale, even through machinery or hand mixing, become mould material with the similar concrete state of certain degree of mobilization, be cast in the mould of a fixed structure, shape, through artificial vibration compacting, seasoning form removal after 1～5 day under the normal temperature state, maintenance.Density is that every cubic metre of mould material weight is 700kg～1800kg, and intensity is the different sorts of 5～25MPa and the seriation waterproof type acidproof heat-proof lightweight heat-proof mould material of purposes.
Wherein the acidproof heat-proof particulate material is an inorganic light-weight aggregate, main employing particle diameter is 0.5mm～25mm, density rating is 200～1200 leca, haydites of book structure, lytag, coal gangue haydite, float stone, volcanic cinder, cinder, natural gangue, potter's clay light weight aggregate, the fire-resistant light skeletal of clay matter, the fire-resistant light skeletal of high alumina matter, silica fire resistant light skeletal, pearlstone, expanded vermiculite, hollow glass bead and multicellular glass etc., or single use or be used in combination, every cubic metre of mould material weight is 240kg～1200kg; The acidproof heat-proof powder mainly adopts the glass-cermic powder of particle diameter less than 0.2mm, acid resistant porcelain powder, acidproof pottery powder, silica powder, diabase flour, andesite powder, granite powder, basalt powder, flyash, fly ash float, aluminosilicate property refractory brick powder, silica brick powder, fire-clay grog powder, high-alumina powder clinker, silicon powder etc., swelling perlite powder and expanded vermiculite powder etc., or single use, or be used in combination, every cubic metre of mould material weight is 120kg～710kg; The acidproof heat-proof binder adopts mainly that density is 1.25～1.65, modulus is 2.0～3.5 water glass, sodium-potassium silicate, potassium silicate or phosphate dihydrogen aluminum solution or instant dry powder etc., and every cubic metre of mould material weight is 155kg～800kg; It is compound that compound additive mainly adopts in oxalic acid, citric acid, zine fluosilicate, Sodium Silicofluoride, ammonium phosphate, condensation of aluminum phosphate, aluminum sulfate salt, ammonium chloride, furans monomer, water-soluble epoxy resin, sodium lignosulfonate, calcium lignin sulphonate, Sodium dodecylbenzene sulfonate, Sodium hexametaphosphate 99, the tripoly phosphate sodium STPP two or more to carry out, and every cubic metre of mould material weight is 20kg～145kg.
The main performance index of mould material of the present invention is as follows:
| Volume density (kg/m 3) | Thermal conductivity w/m*k | Normal temperature strength R 0(Mpa) | Heating back Strength Changes value (400 ℃ of x3h) R heat/R 0 | Strength Changes value after the pickling (5～60% sulfuric acid soaked 30 days) R acid/R 0 | Immersion back Strength Changes value (normal temperature～90 ℃ soaked 30 days) R water/R 0 | Water-intake rate (%) | Anti-permeability strength (S) |
| 700～900 | 0.24～0.27 | 5～7.5 | ≥1 | ≥1 | / | / | / |
| 900～1100 | 0.27～0.35 | 7.5～10 | ≥1 | ≥1 | / | / | / |
| 1100～1400 | 0.35～0.50 | 10～15 | ≥1 | ≥1 | / | / | / |
| 1400～1800 | 0.5～0.9 | 15～25 | ≥1 | ≥1 | ≥0.8 | ≤10 | ≥0.5 |
Waterproof type mould material of the present invention is at 5～60% H
2SO
4Soaked 30 days, intensity does not reduce, variation such as outward appearance do not have the burn into crackle, peel off; Heat under the condition of normal temperature～400 ℃, intensity does not reduce, and outward appearance does not have variations such as distortion; The waterproof type mould material was soaked 30 days in ℃ water of normal temperature～90, and intensity reduces less than 20%, low, the impervious good frost resistance of water-intake rate.
The present invention can be widely used in various the needs and do inner lining material in heat-insulation and heat-preservation and acid-proof corrosive large industry equipment, pipeline, the chimney flue, can alleviate equipment self-weight, reduce cost, increase the service life, improve execution conditions, but its main purposes is still at the chimney flue of coal-burning power plant and store and do inner lining material in the grey storehouse and use.No matter the chimney, flue, the storage ash storehouse that are concrete structure, brick masonry structure or steel construction all are suitable for.The steel inner cylinder that is particularly useful in the multitube chimney of large coal-fired power plant is done liner, also is adapted to be furnished with in the flue and chimney of coal-burning power plant of desulfurizer.When being used as the Steel Inner Core of Chimney liner of large coal-fired power plant, anti-acid corrosion liner of alternative expensive metal and outside heat insulating layer thereof.When being used as concrete chimney flue or brick structures chimney flue lining, alternative its thermofin and masonry liner.When the liner in the chimney flue that is used as the coal-burning power plant that has been equipped with desulfurizer, also can adapt to the severe environment of low-temperature flue gas saturation zone water (low-concentration sulfuric acid solution) and play the effect of heat insulating and corrosion erosion.
Embodiment
Embodiment 1:
A kind of waterproof type acidproof heat-proof lightweight heat-proof mould material is by fine powder material, zine fluosilicate, ammonium phosphate and sodium-potassium silicate solution compositions such as haydites of book structure, pottery sand particulate material, glass-cermic powder, fly ash floats.Its proportioning is:
Haydites of book structure: particle diameter 15～5mm 0.566
Shale pottery sand: particle diameter 5～0.2mm 0.425
Glass-cermic powder: 180 orders 0.404
Fly ash float 0.121
Zine fluosilicate 0.130
Ammonium phosphate 0.014
Water-soluble epoxy resin 0.02
Sodium-potassium silicate solution d=1.36～1.4 1.0
Make this mould material method: each component is by above-mentioned proportioning weighing, even through machinery or hand mixing, casting in mould or template, manually vibrate or make firm by ramming closely knit, air-setting sclerosis form removal after 1-5 days, the seasoning maintenance can obtain volume density 〉=700kg/m
3Mould material construct body, its thermal conductivity≤0.25w/m.k, ultimate compression strength 〉=5MPa heats 400 ℃ or with 5～60%H
2SO
4Pickling, intensity does not reduce, the outward appearance no change.
Embodiment 2:
A kind of waterproof type acidproof heat-proof lightweight heat-proof mould material is made up of fine powder, condensation of aluminum phosphate, Sodium Silicofluoride, powdery quick dissolved sodium silicate and water such as leca, pottery sand particulate material, high-alumina powder clinker, silicon powders.Wherein proportioning is:
Leca: particle diameter: 15～5mm 1.37
Pottery sand particle: particle diameter: 5～0.2mm 0.68
High-alumina powder clinker: 180 orders 0.59
Silicon powder:＜5 μ 0.085
Condensation of aluminum phosphate: 0.105
Sodium Silicofluoride: 0.079
Powdery quick dissolved sodium silicate: 0.645
Water-soluble epoxy resin: 0.02
Water: 1
Make this mould material method: each component is by above-mentioned proportioning weighing, even through machinery or hand mixing, casting in mould or template, artificial vibration compacting, air-setting sclerosis form removal after 1-5 days, the seasoning maintenance can obtain volume density 〉=1200kg/m
3Mould material construct body, its thermal conductivity≤0.4w/m.k, ultimate compression strength 〉=10MPa heats 400 ℃ or with 5～60%H
2SO
4Pickling, intensity does not reduce, the outward appearance no change.
Embodiment 3:
A kind of waterproof type acidproof heat-proof lightweight heat-proof mould material is made up of flyash haydite, cinder, flyash, acid resistant porcelain powder, Sodium Silicofluoride, Tai-Ace S 150, oxalic acid, water-soluble epoxy resin, potassium silicate solution, and wherein each components by weight is:
Lytag: particle diameter: 5～12mm 1.4
Cinder: particle diameter: 5～0.2mm 0.8
Flyash:＜140 orders 0.32
Acid resistant porcelain powder:＜160 orders 0.44
Sodium Silicofluoride: 0.12
Aluminum sulfate salt: 0.03
Oxalic acid: 0.004
Water-soluble epoxy resin: 0.01
Potassium silicate solution: d=1.25～1.6 1
Waterproof water-soluble epoxy resin: 0.02
Make this mould material method: each component is by above-mentioned proportioning weighing, even through machinery or hand mixing, casting in mould or template, artificial vibration compacting, 10～40 ℃ of form removals after 1～5 day down, the seasoning maintenance can obtain volume density≤1800kg/m
3Mould material construct body, its thermal conductivity≤0.9w/m.k, ultimate compression strength 〉=25MPa heats 400 ℃ or with 5～60%H
2SO
4Pickling, intensity does not reduce, the outward appearance no change.
Claims (4)
1, a kind of waterproof type acidproof heat-proof lightweight heat-proof mould material, wherein the weight proportion of each raw material is: haydites of book structure: particle diameter 15～5mm, 0.566; Shale pottery sand: particle diameter 5～0.2mm, 0.425; Glass-cermic powder: 180 orders, 0.404; Fly ash float: 0.121; Zine fluosilicate: 0.130; Ammonium phosphate: 0.014; Water-soluble epoxy resin: 0.02; Sodium-potassium silicate solution, d=1.36～1.4,1.0.
2, a kind of waterproof type acidproof heat-proof lightweight heat-proof mould material, wherein the weight proportion of each raw material is: leca: particle diameter: 15～5mm, 1.37; Pottery sand particle: particle diameter: 5～0.2mm, 0.68; High-alumina powder clinker: 180 orders, 0.59; Silicon powder:＜5 μ m, 0.085; Condensation of aluminum phosphate: 0.105; Sodium Silicofluoride: 0.079; Powdery quick dissolved sodium silicate: 0.645; Water-soluble epoxy resin: 0.02; Water: 1.
3, a kind of waterproof type acidproof heat-proof lightweight heat-proof mould material, wherein the weight proportion of each raw material is: lytag: particle diameter: 5～12mm, 1.4; Cinder: particle diameter: 5～0.2mm, 0.8; Flyash:＜140 orders, 0.32; Acid resistant porcelain powder:＜160 orders, 0.44; Sodium Silicofluoride: 0.12; Aluminum sulfate salt: 0.03; Oxalic acid: 0.004; Water-soluble epoxy resin: 0.01; Potassium silicate solution: d=1.25～1.6,1; Waterproof water-soluble epoxy resin: 0.02.
4, according to the manufacture method of claim 1,2 or 3 described waterproof type acidproof heat-proof lightweight heat-proof mould material, it is characterized in that: above-mentioned raw materials is mixed to scale, even through machinery or hand mixing, become mould material with the similar concrete state of certain degree of mobilization, be cast in the mould of a fixed structure, shape, through artificial vibration compacting, seasoning form removal after 1～5 day under the normal temperature state, maintenance, making density is that every cubic metre of mould material weight is 700kg～1800kg, and intensity is the waterproof type acidproof heat-proof lightweight heat-proof mould material of 5～25MPa.
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| CNB031219004A CN100484897C (en) | 2003-04-18 | 2003-04-18 | Water-proof acid resistant heat resistant light heat insulating casting material and its manufacturing method |
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| CN100484897C true CN100484897C (en) | 2009-05-06 |
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2003
- 2003-04-18 CN CNB031219004A patent/CN100484897C/en not_active Expired - Fee Related
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