CN101585715B - Microporous refractory heat-insulating material and manufacturing method thereof - Google Patents
Microporous refractory heat-insulating material and manufacturing method thereof Download PDFInfo
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- CN101585715B CN101585715B CN2009100121931A CN200910012193A CN101585715B CN 101585715 B CN101585715 B CN 101585715B CN 2009100121931 A CN2009100121931 A CN 2009100121931A CN 200910012193 A CN200910012193 A CN 200910012193A CN 101585715 B CN101585715 B CN 101585715B
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Abstract
The invention relates to a microporous refractory heat-insulating material and a manufacturing method thereof. The microporous refractory heat-insulating material comprises the following materials proportioned by weight portion: 40 to 70 portions of aggregate, 20 to 50 portions of base material, 2 to 8 portions of foaming agent and not more than 5 portions of water, wherein the base materials consists of the following materials proportioned by weight portion: 20 to 30 portions of coagulant ingredient, 2 to 5 portions of coagulant, 2 to 4 portions of expansion agent, 3 to 5 portions of reinforcing agent, 0.2 to 0.6 portion of water reducing agent, 4 to 6 portions of bonding agent, and 2 to 7 portions of foaming agent which is an animal foaming agent or a vegetal animal foaming agent. The manufacturing method is characterized by comprising the following steps: according to the weight mixture ratio of the materials, adding water to the base material; putting the mixture into a foaming mechanical equipment to mix and uniformly stir the mixture; then adding the foaming agent to form uniform foamed mud through stirring; adding the aggregate into uniform foamed mud, uniformly stirring theaggregate and the uniform foamed mud to prepare castable of the microporous refractory heat-insulating material; and subjecting the castable to injection dry molding or in-situ casting framework molding. The microporous refractory heat-insulating material has bending strength greater than 2.0 MPa, compressive strength greater than 3.5 MPa, ultra-low thermal conductivity, volume density between 250 and 300 kg/m<3>, heat conductivity coefficient between 0.03 and 0.18 w/m.k, as well as strong refractory heat-insulating performance.
Description
Technical field
The invention belongs to the insulating refractory technical field, particularly relate to a kind of microporous refractory heat-insulating material and preparation method thereof.
Background technology
All be with refractory materials and the compound use of lagging material under the existing industrial production worst hot case condition, form high temperature resistant working condition at high temperature side with refractory materials, add all kinds of lagging materials in the refractory materials back, outermost is the steel construction part, needs to form more than three layers the refractory heat-insulating composite structure under the general condition.Use temperature is high more, and refractory insulating layer is thick more, and general industry stove building enclosure thickness of wall body is all greater than 500mm, and outside wall temperature is greater than 80 ℃.Pyrotic smelting stove peripheral structure body of wall is thicker, outside wall temperature higher (greater than 200 ℃).Existing fire-resistant heat insulating material is used existing problems: the construction relative complex, and the material consumption is big, and corresponding stove, Thermal Equipment geometrical scale increase and floor space are increased.Stove Thermal Equipment hull-skin temperature height wastes energy aggravating working environment.For smelting process for production, because of the splendid attire liquid metal solution in short fortune process, because of the surface radiating loss increases, influence quality product and solution temperature is reduced.
Existing heat insulation, refractory materials physical strength, wear resistance and resistance to slag corrosion are relatively poor, should not be used for the load larrying member of stove and directly contact positions such as slag, furnace charge, molten metal.
Summary of the invention
The purpose of this invention is to provide a kind of microporous refractory heat-insulating material.
Another object of the present invention provides a kind of making method of microporous refractory heat-insulating material.
The purpose of microporous refractory heat-insulating material of the present invention realizes by following technical proposals: the material that it is characterized in that comprising following weight part proportioning: aggregate 40-70, base-material 20-50, whipping agent 2-8 and 5 water at the most,
Described aggregate is magnesian, stupalith or perlite material
Described base-material is made up of the material of following weight part proportioning, setting accelerator batching 20-30, setting accelerator 2-5, swelling agent 2-4, toughener 3-5, water reducer 0.2-0.6 and wedding agent 4-6.
Whipping agent is the animal foaming agent or the vegetalitas whipping agent of 2-7 weight part.
Described aggregate magnesian is: light-burning magnesium powder.
Described aggregate stupalith is: aluminosilicate property material or carborundum material.
Described aggregate perlite material is: the perlite fine powder.
Described base-material is made up of the material of following weight part proportioning, the setting accelerator batching is alumine fine powder 20-30, setting accelerator is high-alumina cement 2-5, swelling agent is aquamaine stone flour 2-4, toughener is silicon-dioxide ultrafine powder 3-5, water reducer is tripoly phosphate sodium STPP agent 0.2-0.6, and wedding agent is well as clay fines 4-6.
Described base-material is made up of the material of following weight part proportioning, the setting accelerator batching is alumine fine powder 20-25, setting accelerator is high-alumina cement 3-5, swelling agent is aquamaine stone flour 2-3, toughener is silicon-dioxide ultrafine powder 4-5, water reducer is tripoly phosphate sodium STPP agent 0.3-0.5, and wedding agent is well as clay fines 4-6.
Microporous refractory heat-insulating material making method of the present invention is: at first the base-material with the 20-50 weight part adds 5 parts water at the most, putting into the foaming mechanical means stirs, and then adding weight 2-8 weight part whipping agent stirs the uniform foam mud of formation, the aggregate that adds the 40-70 weight part again mixes the foam mould material of making microporous refractory heat-insulating material, injects dry demoulding moulding of mould or cast-in-site and props up mold forming.
The advantage of microporous refractory heat-insulating material of the present invention is:
1) microporous refractory heat-insulating material making method of the present invention is simple, and raw materials for production market is easily purchased, and makes things convenient for mechanize to produce in batches.Can make fire resistive material product, fire-resistant heat insulating material goods and heat insulation (thermal insulation) lagging material goods respectively according to the industry service condition.Has the dual performance of refractory heat-insulating, thoroughly changed the material product that traditional refractory materials and lagging material only have single performance, make all types of industries stove masonry wall structure conformability good, geometrical dimension reduces, save floor space, operational procedure is simplified, and the refractory heat-insulating performance strengthens, save the energy, reduce investment and running cost.
2) anti-folding compressive strength height.Folding strength＞2.0MPa, ultimate compression strength＞3.5MPa.Ultralow thermal conductivity.Volume density 250-300kg/m
3, its thermal conductivity is 0.12w/mk-0.174w/mk, the material of this numerical value is called thermal insulation material, has stronger heat-proof quality.
3) in light weight, intensity is good.Because the spherical nothing of the sealing of uniform a large amount of Φ＜1mm connects pore in the fire-resistant heat insulating material, makes its volume density can be controlled at 250-1200kg/m
3Spherical perforation closed pores is compared the internal stress that causes with the irregular shape hole and is reduced, the pore spherical surface of equal volume is long-pending minimum, thereby the useful area minimum of weakening matrix, spherical pore does not destroy the continuity of matrix, can make full use of the 70%-90% of refractory material matrix intensity, thereby made insulating refractory physical strength height.
4) refractoriness use temperature height.Select for use magnesian as aggregate, use temperature can reach more than 1800 ℃, selects for use high alumina ceramic as aggregate, and use temperature is greater than 1350 ℃, and such use temperature provides wide application market field for this material.
5) thermostability is excellent.The application majority of insulating refractory is the compression carrying.When density of material was low relatively, the deformation of open-cell foam materials was mainly the hole wall bending, and along with relative density increases, the effect of hole wall simple extension becomes significantly, only Young's modulus was had contribution by the rate of flow of fluid of open celled foam is common.And in closed-cell foam of the present invention, the flexible extension of hole seamed edge or contraction, increased of the contribution of hole wall rigidity to Young's modulus, if pore membrane does not rupture, fluidic compression wherein also can improve its rigidity, thereby has greatly improved the heat resistanceheat resistant stability of substrate material.
6) microporous refractory heat-insulating material of the present invention is widened Application Areas because of it has the insulating refractory double effects.Each class A furnace A kiln body adopts the cast of this material monolithic, conformability is good, bulk strength increases, and 30%-50% can fall in gross weight, thus the weight saving of whole stove steel construction, effect of heat insulation strengthens, improved the thermo-sensitivity of process furnace, the object rate of heating raises, and improves output, reduce the object oxidization burning loss, improve the quality of products.Reduce the thermal inertia of heating stove, heat treatment furnace, be more conducive to Automation of Manufacturing Process control.
7) solve production application special operation condition technical barrier.Enter next procedure after all kinds of smeltings, casting industry molten hot metal (molten steel) are come out of the stove and contain the technical barrier that the fortune insulating equipment is tackling key problem for many years.Molten hot metal (molten steel) temperature of coming out of the stove descends more for a long time, has had a strong impact on quality product.The ladle of steel-making industry is permanent heat insulation in decades from adopting sticking scholar's brick, high alumina brick, and to high alumina castable, because of its thermal conductivity height, the ladle outside wall temperature is high, has a strong impact on product and quality that steel are produced.Recently add between permanent liner and involucrum and build one deck (about 30mm) refractory fibre rigid insulation boards, effect of heat insulation strengthens and has improved, but because of heat-insulating shield reduces because of steam corrosion intensity, shorten work-ing life.Adopt that microporous refractory heat-insulating material of the present invention is integrated poured both can to solve this type of technical barrier.Thereby improve the production output and the quality product of industries such as smelting, casting, save the energy, reduce cost.
8) microporous refractory heat-insulating material of the present invention can be widely used in every profession and trade industrial furnace, Thermal Equipments such as metallurgy, building materials, electric power, chemical industry, machinery, textile printing and dyeing.
Embodiment
The invention will be further described below in conjunction with embodiment.
The purpose of microporous refractory heat-insulating material of the present invention realizes by following technical proposals: the material that it is characterized in that comprising following weight part proportioning: aggregate 40-70, base-material 20-50, whipping agent 2-8 and 5 water at the most,
Described aggregate is magnesian, stupalith or perlite material
Described base-material is made up of the material of following weight part proportioning, setting accelerator batching 20-30, setting accelerator 2-5, swelling agent 2-4, toughener 3-5, water reducer 0.2-0.6 and wedding agent 4-6.
Whipping agent is the animal foaming agent or the vegetalitas whipping agent of 2-7 weight part.
Described aggregate magnesian is: light-burning magnesium powder.
Described aggregate stupalith is: aluminosilicate property material or carborundum material.
Described aggregate perlite material is: the perlite fine powder.
Above-mentioned aggregate all is current materials of selling on the market.
Described base-material is made up of the material of following weight part proportioning, the setting accelerator batching is alumine fine powder 20-30, setting accelerator is high-alumina cement 2-5, swelling agent is aquamaine stone flour 2-4, toughener is silicon-dioxide ultrafine powder 3-5, water reducer is tripoly phosphate sodium STPP agent 0.2-0.6, and wedding agent is well as clay fines 4-6.
The making method of microporous refractory heat-insulating material of the present invention is: the material by following weight part proportioning is selected materials, aggregate 40-70, base-material 20-50, whipping agent 2-8 and 3 water at the most,
At first will be by following weight part proportioning: setting accelerator batching 20-30, setting accelerator 2-5, swelling agent 2-4, toughener 3-5, the base-material that water reducer 0.2-0.6 and wedding agent 4-6 form adds water, putting into the foaming mechanical means stirs, after forming solid-liquid two-phase coexistent base-material, and then the animal foaming agent or the vegetalitas whipping agent of adding 2-7 weight part, stir and form uniform foam mud, become solid, liquid, the stable dispersion system of even many micropores of gas three-phase coexistence, and then the adding weight proportion is the aggregate of 40-70, mix the foam mould material of making microporous refractory heat-insulating material, mould material is injected the dry demoulding moulding of mould or cast-in-site props up mold forming.
The technological process of injecting the dry demoulding moulding of mould is: will send into finished product by the foam mould material that said ratio is made and manufacture hopper, take off groove after can doing naturally and be finished commodities, but for the demanding standardized products of refractoriness, need to take off the groove goods and send into kiln reinforcement oven dry, its bake out temperature is 200 ℃, and drying time is to get final product in 24 hours.
The technology that cast-in-site props up mold forming is: for the industrial furnace masonry wall structure, when making fire-resistant heat insulating material at the scene, in the cast-in-site formwork, inject the foam mould material earlier, remove the cast-in-site formwork after the curing, by certain heating curve heating, drying, bake out temperature is 200 ℃, and drying time is 24 hours; Bake out temperature is 400 ℃, dries by the fire 24 hours again; Bake out temperature is 800 ℃, dries by the fire 8 hours again, forms whole stove refractory heat-insulating circummure protection structure.
The present invention can make fire resistive material product respectively according to the industry service condition, fire-resistant heat insulating material goods, heat insulation (thermal insulation) lagging material goods.
The present invention can make standard prod and non-standard product according to service requirements.Standard prod can be built specification and modulus according to existing industrial furnace, make standard square, watt and special-shaped finished commodities, nonstandard product can be made all kinds of nonstandard goods and field mix casting and constructing according to customer requirements.
Microporous refractory heat-insulating material of the present invention is to select different aggregates respectively for use according to the fire resistance rating of goods:
When requiring the product refractoriness less than 1800 ℃, described aggregate adopts the magnesium cement material;
When requiring the product refractoriness less than 1200 ℃, described aggregate adopts stupalith;
When requiring the product refractoriness less than 800 ℃, described aggregate adopts the perlite material.
Embodiment 1: the weight part proportioning of microporous refractory heat-insulating material:
Aggregate: light-burning magnesium powder 60, base-material: setting accelerator batching alumine fine powder 23, setting accelerator high-alumina cement 4, swelling agent aquamaine stone flour 2, toughener silicon-dioxide ultrafine powder 5, water reducer tripoly phosphate sodium STPP 0.3, wedding agent well as clay fines 5, animal foaming agent 3, water 2.6.This microporous refractory heat-insulating material is applicable to that application of temperature less than 1800 ℃ all kinds of operating modes, has effect of heat insulation simultaneously.
Embodiment 2: the weight part proportioning of microporous refractory heat-insulating material:
Aggregate: aluminosilicate property or carbonization are siliceous 65, base-material: setting accelerator batching alumine fine powder 25, setting accelerator high-alumina cement 5, swelling agent aquamaine stone flour 3, toughener silicon-dioxide ultrafine powder 6, water reducer tripoly phosphate sodium STPP 0.4, wedding agent well as clay fines 6, vegetalitas whipping agent 4, water 4.This microporous refractory heat-insulating material is applicable to that application of temperature less than 1200 ℃ all kinds of operating modes, has effect of heat insulation simultaneously.
The used vegetalitas whipping agent of the present invention is to be raw material with the natural phant macromolecular material, handles and generates through a series of complex chemical reactions.Whipping agent is light yellow transparent liquid, and is soluble in water, nonpoisonous and tasteless, has excellent foaming power, and foam is abundant, fine and closely woven,
Embodiment 3: the weight part proportioning of microporous refractory heat-insulating material:
Aggregate: perlite fine powder 70, base-material: setting accelerator batching alumine fine powder 25, setting accelerator high-alumina cement 5, swelling agent aquamaine stone flour 3, toughener silicon-dioxide ultrafine powder 6, water reducer tripoly phosphate sodium STPP 0.4, wedding agent well as clay fines 6, animal foaming agent 5, water 3.This microporous refractory heat-insulating material is applicable to that application of temperature less than 800 ℃ all kinds of operating modes, has effect of heat insulation simultaneously.
The used animal foaming agent of the present invention is to be main raw material with the animal keratoprotein, adds industrial chemicals such as a certain amount of sodium hydroxide, hydrochloric acid, magnesium chloride, and the dissolving of heating, dilute filtration, high temperature shrink and forms.Whipping agent is the dun viscous liquid, has advantages such as gas release is big, foamy body is high, longer duration.
Above-mentioned two kinds of whipping agents are very easy to buy on market.
Claims (1)
1. microporous refractory heat-insulating material is characterized in that comprising the material of following weight part proportioning:
Aggregate: light-burning magnesium powder 60, base-material: setting accelerator batching alumine fine powder 23, setting accelerator high-alumina cement 4, swelling agent aquamaine stone flour 2, toughener silicon-dioxide ultrafine powder 5, water reducer tripoly phosphate sodium STPP 0.3, wedding agent well as clay fines 5, animal foaming agent 3, water 3.
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Cited By (1)
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| CN103044064A (en) * | 2012-12-11 | 2013-04-17 | 朱奎 | Heat-insulating plate with antibacterial effect |
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| CN101182168A (en) * | 2007-11-27 | 2008-05-21 | 中国矿业大学(北京) | Lightweight heat insulating material and method for making same |
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| JP平3-285879A 1991.12.17 |
| JP特开2008-63212A 2008.03.21 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103044064A (en) * | 2012-12-11 | 2013-04-17 | 朱奎 | Heat-insulating plate with antibacterial effect |
| CN103044064B (en) * | 2012-12-11 | 2014-07-02 | 朱奎 | Heat-insulating plate with antibacterial effect |
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