CN101249664A - Preparation technology of asphalt modified coal ash fiberboard material - Google Patents
Preparation technology of asphalt modified coal ash fiberboard material Download PDFInfo
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- CN101249664A CN101249664A CNA2008100350353A CN200810035035A CN101249664A CN 101249664 A CN101249664 A CN 101249664A CN A2008100350353 A CNA2008100350353 A CN A2008100350353A CN 200810035035 A CN200810035035 A CN 200810035035A CN 101249664 A CN101249664 A CN 101249664A
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- coal ash
- ash fiber
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- fiber
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- 239000000463 material Substances 0.000 title claims abstract description 78
- 239000010426 asphalt Substances 0.000 title claims abstract description 51
- 238000005516 engineering process Methods 0.000 title claims abstract description 12
- 239000010883 coal ash Substances 0.000 title claims description 71
- 239000011094 fiberboard Substances 0.000 title claims description 42
- 238000002360 preparation method Methods 0.000 title claims description 14
- 239000000835 fiber Substances 0.000 claims abstract description 43
- 239000002904 solvent Substances 0.000 claims abstract description 12
- 239000011295 pitch Substances 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 239000011294 coal tar pitch Substances 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 10
- WFKAJVHLWXSISD-UHFFFAOYSA-N isobutyramide Chemical compound CC(C)C(N)=O WFKAJVHLWXSISD-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 32
- 239000010881 fly ash Substances 0.000 abstract description 16
- 239000003921 oil Substances 0.000 description 15
- 238000009413 insulation Methods 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
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- 238000007906 compression Methods 0.000 description 6
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- 239000010410 layer Substances 0.000 description 5
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- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- 239000002956 ash Substances 0.000 description 4
- 239000002585 base Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
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- 239000000126 substance Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
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- 238000005469 granulation Methods 0.000 description 2
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- 229910001629 magnesium chloride Inorganic materials 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
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- 239000011165 3D composite Substances 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 229920002085 Dialdehyde starch Polymers 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000002928 artificial marble Substances 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
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- 239000011230 binding agent Substances 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 239000010882 bottom ash Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000003733 fiber-reinforced composite Substances 0.000 description 1
- 238000007380 fibre production Methods 0.000 description 1
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- 229910052736 halogen Inorganic materials 0.000 description 1
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
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Abstract
The invention relates to a preparing technology for bitumen modified fly-ash fiber sheet materials, which is characterized in that the bitumen is firstly prepared into a solution with a certain concentration. The method for preparing the bitumen solution is as follows: the solvent is heated to a certain temperature, and the bitumen is added to the heated solvent and stirred to dissolve fully. The fly-ash fiber is heated to 80 to 120 DEG C, and the bitumen solution is uniformly sprayed to the fly-ash fiber. Then the fly-ash fiber goes through a hot-press forming process under a certain temperature and pressure, and then is taken out of the mold and cooled naturally to dry. Therefore, the bitumen modified fly-ash fiber sheet materials are obtained. The bitumen modified fly-ash fiber sheet materials prepared by the technology has better impact strength, compressive strength and tensile strength, and can be used as decorating materials.
Description
Technical field
The present invention relates to a kind of technology of preparing of asphalt modified coal ash fiberboard material, specifically, is to prepare coal ash fiberboard material with pitch as bonding agent, and the process of this technology.
Background technology
At present, flyash is used widely at building materials field, and is more remarkable with the utilization of dry discharge fly ash especially, and wet-discharged coal ash is because its dregginess height, and granularity is thicker etc., causes its application to be very limited, and only is confined to backfill, builds the road, engineering such as brickmaking.Need the present situation of classification at the current use flyash of building material industry, we have carried out many-sided research, on powdered coal ash is selected, need not the classification ash, no matter ash discharge, wet ash discharge are done by power plant, furnace bottom ash and cinder etc. all can use.Chemical property according to each coal, through the type selecting proportioning, application engineeringization, supportingization, the streamline production technology of mechanization, flyash is changed into the fireproof heat insulating cellucotton, manufacture top grade, novel, fire prevention, energy-saving serial building material product through deep processing again: the cotton heat insulating products of coal ash fiber, the three-dimensional composite plate of the cotton semihard slab of coal ash fiber silk screen, the cotton fire prevention of coal ash fiber furred ceiling acoustic board, the cotton high strength multipurpose of coal ash fiber fire-retardant wall plate.
Different coal-fired ash content chemical compositions have certain difference, and particle is thin, has pozzolanic activity, and its Chemical Physics performance inconsistency is less, and discharge capacity is more concentrated, is a kind of industrial waste that is suitable for developing.Flyash and other auxiliary material of content about 70% is molten for liquid in high-temperature smelting pot, can gas melt be made very thin canescence fiber with centrifugal force and high ballast, about 3～6 μ m of diameter are exactly the coal ash fiber cotton.This cotton dregginess higher (about 12%) can be used for producing general industry insulating tube and insulation semihard plate.This cotton process is unclogged and readjusted, removes about 80% slag ball, pass through granulation again, can make the particle product of the about 6～12mm of equivalent diameter, be called the flyash granulated wool), mainly can be used as inserts, spraying raw material or refining raw material, its dregginess about≤2.4%.Metering and convenient transportation carry out tens of procedure processing with granulated wool through special equipment, just become the multifunctional top grade decorative building material---the cotton decoration acoustic absorption of coal ash fiber.Exist a large amount of the air gaps between these goods fibers, thereby has a good heat-insulating property, especially acoustic board has multiple efficacies such as decoration, sound absorption, insulation, heat insulation, fire prevention, fire-retardant, light weight, can be widely used in all kinds of workers such as hotel, restaurant, office building, office room, cinema, megastore, family room, the people, building decoration furred ceiling, particularly to eliminating the disaster hidden-trouble of skyscraper, has significant technical advantage, raw material is easy to get in addition, and is cheap.Become the first-selected product of ceiling material at home and abroad.
Big along with the high-grade road traffic amount, canalized traffic is obvious, the speed of a motor vehicle is high, axle carries heavy-duty day by day, therefore also more and more high to the requirement of road, not only require the road surface that enough intensity, stability, skid resistance, planarization are arranged, but also require to have favorable durability, guarantee that every index is unlikely obvious reduction in advance in the highway operating period, guarantee vehicle safety, comfortable, quick current.For bituminous paving, for reaching above-mentioned requirements, except rational pavement structure design, outside the strict construction quality, the high performance pitch essential condition that is absolutely necessary.But the quality of the heavy traffic asphaltum that China produces and quantity can not satisfy the needs that advanced road is built far away.Therefore pitch is carried out modification, oneself is imperative to study high performance modified pitch.
At present both at home and abroad to the research of modified pitch, great majority are polymeric asphalt modifiers, as maximum SBS of present domestic employing and PE etc.Owing to there is the problem that is difficult to mix with pitch, this method of modifying determined produce and process equipment aspect on, requirement has bigger investment, as special shearing equipment and higher energy resource consumption etc., can be fully fused to impel modifier and pitch.In transportation and storage, then need heat tracing and uninterrupted the stirring, prevent the layering and the segregation of modifier and pitch, it is very inconvenient that the user uses, thereby limited the application of modified pitch to a certain extent.
The present domestic flyash fibrillating technique that realized, in the production solid residue behind flyash or the blast-furnace roasting is added necessary auxiliary agent and water, fusing at high temperature after stirring and granulation, again through pressurization, by the centrifugal silk that throws away into of multistage running roller, by cooling and surface treatment, make inorganic coal ash fiber.This fiber has been applied to the industrial heat preservation material and has made inorganic fiber paper pulp partly substituting the wood-fibred pulp applications in paper industry.Further rationally utilize this inorfil from the discarded object preparation, turning waste into wealth has important strategic meaning and economic worth.
Chinese patent CN1393609 discloses a kind of fire-proof board and manufacture method thereof, it is that a kind of to make a kind of by material step, feeding step, cutting step, fixating shape step and baking step be base material with the polyester capillaries to comprise at least, and in the base material outside and internal fiber gap complete filling mineral matter filler material, and the high structural strength that constitutes, and fire-proof board with sound insulation, effect such as heat insulation.
Chinese patent CN1459431 discloses conductive fiber and has strengthened calcium silicate board, and the shape of product of this invention is a sheet material, and it comprises the raw material of following weight parts: silica flour 30-50 part, conductive carbon black 1-10 part, calcium hydroxide 25-45 part, fortifying fibre 8-13 part.It has excellent conducting performance, antistatic, can absorb electromagnetism involves the intensity advantages of higher.
Chinese patent CN1457965 discloses a kind of method of bionic reinforced plate, and it is to be the technology of main material production processing non-wood plate with the agricultural crop straw.Its technical essential is to adopt semidry method, chooses the blank of different classes of, different size and structure according to the purposes of finished product, adopts after the atomization applying glue and mats formation compression moulding then with station or flowing water dystopy.In pavement process, adopt the atomizing spray glue limit, blank limit of different size to mat formation, and precompressed successively.Being distributed as of each layer: middle is the reinforcement layer, and the both sides of reinforcement layer are followed successively by the coarse fodder layer, and fines layer, described glue are dialdehyde starch, protein complex, the polymer-binder of perhaps selecting the water soluble polymer process of resin to become.
Chinese patent CN1450017 discloses a kind of environment protection type inorganic inner/outer dry wallboard making process and prescription, and this invention is a kind of by magnesium chloride, magnesia, long fibered pulp, anti reversed halogen agent, and antitack agent, enhancing flexibilizer prescription are formed.Ooze technologies such as watertight composition, packing, warehouse-in through mixing of materials, depositing, repeatedly roll-in, curing, the demoulding, maintenance, deburring, washing, drying, surface and make a kind of decorating inner and external walls sheet material of complete environmental protection, his characteristics are in light weight, can follow closely, can dig, Pasting, do not contain oxious components such as glass fibre, asbestos, mineral wool, but can guarantee that sheet material has enough intensity, convenient transportation, feel and sense organ are very good, can also carry out mechanization production and the production of surface pressure decorative pattern streamline.Overcome common magnesium chloride, magnesia is the inside and outside wall board of base-material.Glass emergence on the surface, texture be as tile, and surperficial steam bubble is many can not mass mechanized production and the plate embossed surface streamline shortcoming of producing.
Chinese patent CN1408671 discloses a kind of method for making of high temperature resistant, high strength and high density degree calcium silicate board, with silicon metal micro mist, non-crystalline silicon micro mist, calcareous raw material, mineral add material, fibrous material is a raw material, with CaO: SiO
2Mol ratio is 0.95～1.05 batching, add 1～8% fibrous material then, 0～12% mineral add material, mix the back and make sheet material or bulk with die mould method or casting, sheet material or bulk are delivered to steam-cured still under 190 ℃～200 ℃ saturated vapor condition steam-cured 6～20 hours, oven dry is finished product to moisture below 5% in 100 ℃～180 ℃ hot blasts.
Chinese patent CN1141992 discloses a kind of light sound-insulation building plate of cinder and concrete, it is the light sound-insulation building board of primary raw material with the slag that this invention belongs to a kind of, it mainly is made of cinder concrete base material and enhancing material, the umber that it is characterized in that the key component of described cinder concrete base material is respectively slag 100 by its parts by weight, Binder Materials 10-35, waterproofing agent 0.1-1, conditioning agent 0.1-1, water 15-35, described enhancing material is glass fibre, reinforcing bar or nonwoven.
Chinese patent CN1162520 discloses a kind of ceramsite concrete light-weight wall boards and manufacturing process thereof, and this invention relates to a kind of construction material, particularly materials for wall.It is to be gelling agent with cement, is aggregate with the haydite, is inserts with the expanded perlite, adds special building glue, and strengthens with the alkali resistant glass fiber net at surface layer, makes through special procedure.
Chinese patent CN85107095 discloses a kind of bamboo fiber reinforced composite material, this invention proposes to substitute timber and steel with bamboo-plastic composite material, manufacture various types of sheet materials and section bar, and propose to replace glass fibre, make the artificial marble, plastering, concrete, asphalt waterproofing material and the wood-based plate that strengthen with bamboo-plastic composite material.
Chinese patent CN1048003 discloses a kind of manufacture method of diversity composite board, refers to a kind of manufacture method of the compound plate material with characteristics such as high strength, vibration strength, thermal insulation and sound insulations especially; Its main process is that staple fibre is prefabricated into fiber cloth, this fiber cloth is mixed uniformly with modulation in advance soak the material dipping again, again through neutralization, oven dry, roll extrusion, applying and roll extrusion once more, and makes a kind of composite board.
Innovative point of the present invention is: the fiber that utilizes trade waste flyash to make helps environmental protection; Pitch is divided into asphalt and coal tar pitch, and asphalt is little because of sulfur content, performance good, be used widely, and coal tar pitch content height, poor performance, range of application is less, belongs to trade waste, and present technique can make coal tar pitch be applied, and helps environmental protection; The pitch cementability is good, can surface of fly ash fiber is bonding, and pitch has also been filled the gap of coal ash fiber simultaneously, helps the raising of coal ash fiberboard material density and intensity.After be used to make sheet material, help moulding, simultaneously the timber intensity of making is improved greatly; Coal ash fiberboard material surface behind the asphalt modification has hydrophobicity, the sheet material water-tolerant.
Summary of the invention
A kind of technology of preparing of asphalt modified coal ash fiberboard material, it is characterized in that, bitumen production is become certain density solution, the preparation method of cold primer-oil earlier: solvent is heated to certain temperature, pitch is joined in the solvent of heating, stirring is dissolved pitch fully again.Coal ash fiber is heated to 80--120 ℃, be sprayed onto cold primer-oil on the coal ash fiber equably, coal ash fiber is carried out hot-formingly under certain temperature, certain pressure, natural airing after the demoulding promptly obtains asphalt modified coal ash fiberboard material again.
Described pitch can be coal tar pitch, also can be asphalt.
Described solvent can be N, dinethylformamide, N, one or more in the N-dimethylacetylamide.
The temperature of described solvent heating is 60--120 ℃, and most preferably temperature is 80--100 ℃.
The mass content of described pitch in solvent is 20-50%.
It is the 0.5-5% of dry state coal ash fiber quality that described cold primer-oil sprays consumption.
Described coal ash fiber hot forming temperature is 130--180 ℃.
Described coal ash fiber hot forming pressure is 0.5-10MPa.
With prepared asphalt modified coal ash fiberboard material, measure density with reference to ISO 1183-2-2004 method; With reference to GB/T 1964-1996 method sample preparation and carry out compressive strength test; With reference to the sample preparation of GB/T1843-1996 method and carry out impact strength test; With reference to GB/T 1446-2005 method sample preparation and carry out hot strength test.
The present invention is with asphalt modified coal ash fiber production sheet material, the density 750～850kg/m3 of gained sample; Compressive strength 8.0～9.0MPa; Impact strength 1.0～1.2 (kJ/m2); Hot strength 0.50～0.65MPa.
Asphalt modified coal ash fiberboard material with the present technique preparation has mechanical properties such as impact strength, compressive strength, hot strength preferably, can be used as ornament materials, insulation material.
The specific embodiment
Embodiment 1
Add 5kg N in the reactor that the 10L band stirs, dinethylformamide is opened and is stirred, and begins heating, when temperature rises to 120 ℃, the 2kg coal tar pitch is joined in the reactor, stirs coal tar pitch is dissolved fully, obtains cold primer-oil 6.25kg.The 1250kg coal ash fiber is heated to 120 ℃, spray the 6.25kg cold primer-oil of above-mentioned preparation then equably, it is framed to put into 0.5m * 0.5m again, hot-forming under 180 ℃, the pressure of 10MPa, obtain being of a size of 0.5m * 0.5m, thickness and be 192 of the coal ash fiberboard materials of 0.03m, gross weight 1218kg, natural airing after the demoulding promptly obtains asphalt modified coal ash fiberboard material.Coal ash fiberboard material is measured density according to ISO 1183-2-2004 method; Make batten according to GB/T 1964-1996, GB/T 1843-1996, GB/T 1446-2005 etc., difference test compression intensity, impact strength and hot strength, data are listed in table 1.
Table 1 asphalt modified coal ash fiberboard material mechanical property
| Asphalt modified coal ash fiberboard material | Density (kg/m 3) | Compressive strength (MPa) | Impact strength (kJ/m 2) | Hot strength (MPa) |
| No.1 | 846 | 8.59 | 1.16 | 0.61 |
Embodiment 2
Add 20kgN in the reactor that the 50L band stirs, the N-dimethylacetylamide is opened and is stirred, and begins heating, when temperature rises to 60 ℃, 5kg asphalt is joined in the reactor, stirs asphalt is dissolved fully, obtains cold primer-oil 24.2kg.The 1000kg coal ash fiber is heated to 90 ℃, spray the 24.2kg cold primer-oil of above-mentioned preparation then equably, it is framed to put into 0.5m * 0.5m again, hot-forming under 160 ℃, the pressure of 6MPa, obtain being of a size of 0.5m * 0.5m, thickness and be 156 of the coal ash fiberboard materials of 0.03m, gross weight 958kg, natural airing after the demoulding promptly obtains asphalt modified coal ash fiberboard material.Coal ash fiberboard material is measured density according to ISO 1183-2-2004 method; Make batten according to GB/T 1964-1996, GB/T 1843-1996, GB/T 1446-2005 etc., difference test compression intensity, impact strength and hot strength, data are listed in table 2.
Table 2 asphalt modified coal ash fiberboard material mechanical property
| Asphalt modified coal ash fiberboard material | Density (kg/m 3) | Compressive strength (MPa) | Impact strength (kJ/m 2) | Hot strength (MPa) |
| No.2 | 819 | 8.38 | 1.11 | 0.58 |
Embodiment 3
Add 30kgN in the reactor that the 50L band stirs, dinethylformamide is opened and is stirred, and begins heating, when temperature rises to 100 ℃, the 15kg coal tar pitch is joined in the reactor, stirs coal tar pitch is dissolved fully, obtains cold primer-oil 43.8kg.The 880kg coal ash fiber is heated to 105 ℃, spray the 43.8kg cold primer-oil of above-mentioned preparation then equably, it is framed to put into 0.5m * 0.5m again, hot-forming under 170 ℃, the pressure of 3MPa, obtain being of a size of 0.5m * 0.5m, thickness and be 148 of the coal ash fiberboard materials of 0.03m, gross weight 864kg, natural airing after the demoulding promptly obtains asphalt modified coal ash fiberboard material.Coal ash fiberboard material is measured density according to ISO 1183-2-2004 method; Make batten according to GB/T 1964-1996, GB/T 1843-1996, GB/T 1446-2005 etc., difference test compression intensity, impact strength and hot strength, data are listed in table 3.
Table 3 asphalt modified coal ash fiberboard material mechanical property
| Asphalt modified coal ash fiberboard material | Density (kg/m 3) | Compressive strength (MPa) | Impact strength (kJ/m 2) | Hot strength (MPa) |
| No.3 | 779 | 8.13 | 1.06 | 0.52 |
Embodiment 4
Add 25kgN in the reactor that the 50L band stirs, the N-dimethylacetylamide is opened and is stirred, and begins heating, when temperature rises to 90 ℃, 20kg asphalt is joined in the reactor, stirs asphalt is dissolved fully, obtains cold primer-oil 43.6kg.The 1200kg coal ash fiber is heated to 95 ℃, spray the 43.6kg cold primer-oil of above-mentioned preparation then equably, it is framed to put into 0.5m * 0.5m again, hot-forming under 140 ℃, the pressure of 2MPa, obtain being of a size of 0.5m * 0.5m, thickness and be 204 of the coal ash fiberboard materials of 0.03m, gross weight 1176kg, natural airing after the demoulding promptly obtains asphalt modified coal ash fiberboard material.Coal ash fiberboard material is measured density according to ISO 1183-2-2004 method; Make batten according to GB/T 1964-1996, GB/T 1843-1996, GB/T 1446-2005 etc., difference test compression intensity, impact strength and hot strength, data are listed in table 4.
Table 4 asphalt modified coal ash fiberboard material mechanical property
| Asphalt modified coal ash fiberboard material | Density (kg/m 3) | Compressive strength (MPa) | Impact strength (kJ/m 2) | Hot strength (MPa) |
| No.4 | 769 | 8.01 | 1.04 | 0.51 |
Embodiment 5
Add 28kgN in the reactor that the 50L band stirs, dinethylformamide is opened and is stirred, and begins heating, when temperature rises to 110 ℃, the 12kg coal tar pitch is joined in the reactor, stirs coal tar pitch is dissolved fully, obtains cold primer-oil 38.4kg.The 1050kg coal ash fiber is heated to 1lO ℃, spray the 38.4kg cold primer-oil of above-mentioned preparation then equably, it is framed to put into 0.5m * 0.5m again, hot-forming under 130 ℃, the pressure of 9MPa, obtain being of a size of 0.5m * 0.5m, thickness and be 164 of the coal ash fiberboard materials of 0.03m, gross weight 1028kg, natural airing after the demoulding promptly obtains asphalt modified coal ash fiberboard material.Coal ash fiberboard material is measured density according to ISO 1183-2-2004 method; Make batten according to GB/T 1964-1996, GB/T 1843-1996, GB/T 1446-2005 etc., difference test compression intensity, impact strength and hot strength, data are listed in table 5.
Table 5 asphalt modified coal ash fiberboard material mechanical property
| Asphalt modified coal ash fiberboard material | Density (kg/m 3) | Compressive strength (MPa) | Impact strength (kJ/m 2) | Hot strength (MPa) |
| No.5 | 836 | 8.47 | 1.13 | 0.59 |
Embodiment 6
Add 12kgN in the reactor that the 50L band stirs, the N-dimethylacetylamide is opened and is stirred, and begins heating, when temperature rises to 85 ℃, 10kg asphalt is joined in the reactor, stirs asphalt is dissolved fully, obtains cold primer-oil 21.4kg.The 1080kg coal ash fiber is heated to 80 ℃, spray the 21.4kg cold primer-oil of above-mentioned preparation then equably, it is framed to put into 0.5m * 0.5m again, hot-forming under 150 ℃, the pressure of 7MPa, obtain being of a size of 0.5m * 0.5m, thickness and be 172 of the coal ash fiberboard materials of 0.03m, gross weight 1062kg, natural airing after the demoulding promptly obtains asphalt modified coal ash fiberboard material.Coal ash fiberboard material is measured density according to ISO 1183-2-2004 method; Make batten according to GB/T 1964-1996, GB/T 1843-1996, GB/T 1446-2005 etc., difference test compression intensity, impact strength and hot strength, data are listed in table 6.
Table 6 asphalt modified coal ash fiberboard material mechanical property
| Asphalt modified coal ash fiberboard material | Density (kg/m 3) | Compressive strength (MPa) | Impact strength (kJ/m 2) | Hot strength (MPa) |
| No.6 | 824 | 8.46 | 1.13 | 0.58 |
Claims (8)
1. the technology of preparing of an asphalt modified coal ash fiberboard material, it is characterized in that, bitumen production is become certain density solution, the preparation method of cold primer-oil earlier: solvent is heated to certain temperature, pitch is joined in the solvent of heating, stirring is dissolved pitch fully again.Coal ash fiber is heated to 80--120 ℃, be sprayed onto cold primer-oil on the coal ash fiber equably, coal ash fiber is carried out hot-formingly under certain temperature, certain pressure, natural airing after the demoulding promptly obtains asphalt modified coal ash fiberboard material again.
2. the pitch described in the claim 1 can be coal tar pitch, also can be asphalt.
3. the solvent described in the claim 1 can be N, dinethylformamide, N, one or more in the N-dimethylacetylamide.
4. the temperature of the heating of the solvent described in the claim 1 is 60--120 ℃, and most preferably temperature is 80--100 ℃.
5. the mass content of the pitch described in the claim 1 in solvent is 20-50%.
6. the sprinkling of the cold primer-oil described in the claim 1 consumption is the 0.5-5% of dry state coal ash fiber quality.
7. the coal ash fiber hot forming temperature described in the claim 1 is 130--180 ℃.
8. the coal ash fiber hot forming pressure described in the claim 1 is 0.5-10MPa.
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