CN117606244A - Double-water pipe column heat insulation structure of heating furnace for high-temperature oriented silicon steel and preparation method thereof - Google Patents
Double-water pipe column heat insulation structure of heating furnace for high-temperature oriented silicon steel and preparation method thereof Download PDFInfo
- Publication number
- CN117606244A CN117606244A CN202311605881.5A CN202311605881A CN117606244A CN 117606244 A CN117606244 A CN 117606244A CN 202311605881 A CN202311605881 A CN 202311605881A CN 117606244 A CN117606244 A CN 117606244A
- Authority
- CN
- China
- Prior art keywords
- prefabricated
- layer
- heat insulation
- tenon
- mortise
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009413 insulation Methods 0.000 title claims abstract description 138
- 238000010438 heat treatment Methods 0.000 title claims abstract description 88
- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 50
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000000835 fiber Substances 0.000 claims abstract description 85
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 63
- 239000010959 steel Substances 0.000 claims abstract description 63
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 56
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 56
- 239000011575 calcium Substances 0.000 claims abstract description 56
- 239000011819 refractory material Substances 0.000 claims abstract description 40
- 238000010276 construction Methods 0.000 claims abstract description 25
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 238000004321 preservation Methods 0.000 claims abstract description 17
- 239000010410 layer Substances 0.000 claims description 189
- 238000000576 coating method Methods 0.000 claims description 40
- 239000011248 coating agent Substances 0.000 claims description 30
- 238000004519 manufacturing process Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 17
- 239000004570 mortar (masonry) Substances 0.000 claims description 17
- 238000005056 compaction Methods 0.000 claims description 15
- 239000007787 solid Substances 0.000 claims description 14
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 11
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 238000012423 maintenance Methods 0.000 claims description 9
- TXBCBTDQIULDIA-UHFFFAOYSA-N 2-[[3-hydroxy-2,2-bis(hydroxymethyl)propoxy]methyl]-2-(hydroxymethyl)propane-1,3-diol Chemical compound OCC(CO)(CO)COCC(CO)(CO)CO TXBCBTDQIULDIA-UHFFFAOYSA-N 0.000 claims description 7
- 239000004114 Ammonium polyphosphate Substances 0.000 claims description 7
- 229920000877 Melamine resin Polymers 0.000 claims description 7
- 235000019826 ammonium polyphosphate Nutrition 0.000 claims description 7
- 229920001276 ammonium polyphosphate Polymers 0.000 claims description 7
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 6
- 238000004132 cross linking Methods 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 239000000839 emulsion Substances 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 238000006116 polymerization reaction Methods 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 230000009977 dual effect Effects 0.000 claims description 5
- 230000009970 fire resistant effect Effects 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 claims description 3
- 229920006255 plastic film Polymers 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 18
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract description 15
- 229910052751 metal Inorganic materials 0.000 abstract description 15
- 239000002184 metal Substances 0.000 abstract description 15
- 239000003238 silicate melt Substances 0.000 abstract description 10
- 230000007797 corrosion Effects 0.000 abstract description 9
- 238000005260 corrosion Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 7
- 239000012774 insulation material Substances 0.000 abstract description 7
- 239000002893 slag Substances 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 11
- 238000004873 anchoring Methods 0.000 description 7
- 239000000919 ceramic Substances 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 5
- 230000003628 erosive effect Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 3
- 239000004964 aerogel Substances 0.000 description 3
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 239000002055 nanoplate Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 2
- 150000001342 alkaline earth metals Chemical class 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000003064 anti-oxidating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 210000000883 ear external Anatomy 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/70—Furnaces for ingots, i.e. soaking pits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a non-planar shape
- B32B1/08—Tubular products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/18—Layered products comprising a layer of metal comprising iron or steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
- B32B3/06—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions for securing layers together; for attaching the product to another member, e.g. to a support, or to another product, e.g. groove/tongue, interlocking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B9/047—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material made of fibres or filaments
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B17/00—Furnaces of a kind not covered by any preceding group
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/0003—Linings or walls
- F27D1/0033—Linings or walls comprising heat shields, e.g. heat shieldsd
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D9/00—Cooling of furnaces or of charges therein
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/304—Insulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
- B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2597/00—Tubular articles, e.g. hoses, pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D9/00—Cooling of furnaces or of charges therein
- F27D2009/0002—Cooling of furnaces
- F27D2009/001—Cooling of furnaces the cooling medium being a fluid other than a gas
- F27D2009/0013—Cooling of furnaces the cooling medium being a fluid other than a gas the fluid being water
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The invention discloses a double-water-pipe column heat insulation structure of a heating furnace for high-temperature oriented silicon steel, which comprises a prefabricated part layer of calcium hexaluminate refractory material, a thermal expansion fastening compensation layer, a refractory fiber blanket layer, a nano micropore heat insulation plate layer and double water-cooling steel pipes; the preparation method comprises the steps of compacting and fixing the nano microporous heat insulation plate layer and the refractory fiber blanket layer by adopting a heat preservation layer compacting and fixing die, and then constructing a prefabricated part layer of calcium hexaaluminate refractory material. The invention improves the corrosion resistance and the heat insulation performance of ferrous silicate melt through the use of the calcium hexaluminate prefabricated member working lining, improves the heat insulation performance and the high-temperature use performance of the stand column through the use of multi-layer heat insulation materials with different temperature ranges, eliminates the anchor and the metal fixing block through the joint design of the mortise and tenon structure and the thermal expansion self-locking structure, solves the problems of material thermal expansion mismatch, stress concentration damage, heat island effect and the like caused by the anchor and the metal fixing block, and has the advantages of excellent heat insulation performance, ferrous silicate melt corrosion resistance, short construction time and the like.
Description
Technical Field
The invention relates to the technical field of heating furnace energy conservation, in particular to a double-water-pipe column heat insulation structure of a heating furnace suitable for high-temperature oriented silicon steel and a preparation method thereof.
Background
The heating furnace is used as important equipment for heating billets, and the heating capacity, the production efficiency and the energy consumption level of the heating furnace are of great significance for large-scale low-cost production of the whole hot rolling production line. In the heating process of the high-temperature oriented silicon steel, the temperature of the heating furnace is high, the time of the heating furnace is long, so that the oxidation burning loss in the steel billet furnace is large, fe and Si elements on the surface of the steel billet are oxidized to form ferrous silicate melt which continuously flows to the surfaces of a water beam and an upright post for supporting the steel billet and the furnace bottom, and the ferrous silicate melt contacts, erodes and adheres to refractory materials of the water beam and the upright post to form a large number of slag post suspensions, so that the damage of heat insulation lining of the water beam and the upright post is accelerated, the burning condition of the lower space of the heating furnace is deteriorated, and finally, the furnace is stopped for slag removal due to the fact that the heating quality and normal production operation in the steel billet furnace cannot be satisfied, so that the production efficiency of the heating furnace is reduced, the maintenance cost of the furnace is increased, the burning loss of the heating furnace is increased, and the like. Therefore, how to reduce corrosion of ferrous silicate melt to water beams and columns of the heating furnace, reduce slag hanging, improve heat insulation performance and realize quick replacement of heat insulation lining is particularly important for low-energy consumption and high-efficiency production of the high-temperature oriented silicon steel heating furnace.
In the prior art, the traditional water beam and upright post heat insulation structure mostly adopts a double composite structure, the inner layer is a refractory fiber blanket with the thickness of 20mm, the outer layer is a 60mm silicon-aluminum self-flow castable, the thermal shock stability is poor, the service life is generally 2-3 years, local maintenance is needed in a short time, the self-flow castable has a large heat conduction coefficient (1.2W/m.K, the hot surface temperature is 1000 ℃), the heat insulation performance is poor, and the water beam and upright post heat insulation structure is one of the main reasons for causing high water-cooling heat loss of the water beam and upright post. In addition, the silicon-aluminum self-flow castable has poor ferrous silicate corrosion resistance, and is difficult to meet the requirement of high-efficiency heating of high-temperature oriented silicon steel. After enterprises try to replace a double composite structure consisting of casting materials and ceramic fiber blankets by adopting a single ceramic fiber module, the structure reduces the heat taken away by cooling water by 38 percent, but Al 2 O 3 -SiO 2 The module formed by ceramic fibers has lower strength, cannot resist the erosion of iron scales, is shut down for maintenance and repair every half a year, and cannot be popularized and applied in actual production.
The invention patent with publication number CN103388055B discloses a step-by-step heating furnace beam and stand column fire-resistant heat insulation lining structure for heating high-temperature oriented silicon steel, which comprises a metal pipe forming a furnace beam or stand column foundation, wherein heat-resistant cushion blocks are arranged on the metal pipe forming the furnace beam foundation at intervals along the axial direction, metal anchoring parts are uniformly distributed on the outer wall of the metal pipe along the axial direction and the circumferential direction, a fire-resistant heat insulation layer which is combined with the metal anchoring parts into a whole is poured on the outer wall of the metal pipe in a tight manner, and an anti-slag layer and an anti-oxidation coating are sequentially covered outside the fire-resistant heat insulation layer. The furnace beam and upright column fireproof heat insulation lining of the step-by-step heating furnace adopts a double-layer structure of the heat insulation layer and the slag adhesion prevention layer and a design with proper thickness, so that the integrity of the heat insulation lining is enhanced, the comprehensive service performance of the heat insulation lining is improved, and the requirements of heat insulation and slag corrosion prevention of the water beam and upright column of the high-temperature oriented silicon steel heating furnace are met. However, the patent still cannot solve the problems of long construction period, large construction quality fluctuation, and cracking and breakage caused by anchor heat island effect and stress concentration caused by the construction mode of the anchor and the castable.
The invention patent with publication number of CN105444579A discloses a binding method for a water beam of a heating furnace, wherein a fixed block is arranged on the outer surface of a water pipe at the bottom of the furnace, a semi-cylindrical precast block A and a precast block B are prepared by adopting a heat insulation material with a heat conduction coefficient of less than 1.0W/m.K, the precast block A and the precast block B are mutually matched into a cylinder and are internally provided with grooves with the same size as the fixed block, the precast block A and the precast block B are respectively arranged at the outer side of the water pipe at the bottom of the furnace, the inner grooves of the precast block A and the precast block B are tightly matched and connected with the fixed block, and finally, the joint of the precast block A and the precast block B and the joint of the water pipe at the bottom of the furnace are sealed by adopting high-temperature cement. The prefabricated block A and the prefabricated block B are fixed by the metal fixing blocks welded on the water-cooled steel pipe, and the prefabricated block A and the prefabricated block B are easy to break due to the fact that the thermal expansion coefficients of the metal and the heat insulating material are large in difference, and cracks are easily generated at the corner positions of the joint parts due to stress concentration, and the heat-insulating material with the heat conductivity coefficient smaller than 1.0W/m.K has relatively large heat conductivity coefficient and insufficient heat insulation performance, and the metal fixing block has larger volume compared with the conventional anchoring piece, so that the heat island effect is more obvious, and the local heat transfer is accelerated.
The utility model discloses a novel water beam column heat-insulating assembly of a step-by-step steel rolling heating furnace, which is disclosed in the utility model with publication number CN216745396U, and comprises a plurality of heat-insulating bodies, wherein the heat-insulating bodies are provided with mortise and tenon structures; two adjacent heat preservation bodies are connected end to end through a mortise and tenon structure to form an annular heat preservation layer which is wrapped on a water beam column (the lower half part of the furnace bottom). The heat-insulating component is assembled by adopting the heat-insulating body with the mortise-tenon structure, the traditional anchor ear external force fastening is replaced by the mortise-tenon structure connecting fastening, and the connection firmness of the heat-insulating body in a high-temperature state is enhanced while the installation convenience is improved by adopting a mortise-tenon engagement mode of the circular arc-shaped tenons and the mortise; in order to ensure the mounting dimensional accuracy of the mortise and tenon structure, the mortise and tenon structure is manufactured by laser cutting, so that the manufacturing accuracy is ensured; meanwhile, the heat insulator adopts the novel nano porous aerogel heat insulation material, so that the heat insulation performance of the heat insulation component is effectively improved. The application scene of the utility model is heatingThe furnace water beam upright post is positioned at the lower half part of the furnace bottom, can be used as a heat preservation component only for sealing and preserving heat at the joint part of the furnace bottom and the upright post, and cannot be used for heating a high-temperature area in the furnace water beam upright post, and the main reason is that: novel nano porous aerogel heat insulation material has the defects of low strength, low use temperature and the like, and is SiO 2 The highest use temperature of the nano porous aerogel heat insulation material is generally lower than 800 ℃, and the oxidation iron sheet and ferrous silicate erosion resistance and high-temperature flue gas scouring resistance are poor, so that the performance requirement of long-term use under high-temperature flue gas of 900-1300 ℃ of a steel rolling heating furnace cannot be met.
The utility model discloses a heating furnace water beam heat-insulating and energy-saving structure with publication number CN216282703U, which sequentially comprises a flexible nano plate, a ceramic fiber blanket and a castable from a cold surface to a hot surface, wherein the flexible nano plate and the ceramic fiber blanket are stitched together through a suture, and the castable is fixed by a Y-shaped anchoring piece. The surface of the flexible nano-plate can be stuck with double faced adhesive tape. The water beam heat-insulating and energy-saving structure of the heating furnace can perfectly cover the water beam wall plate, can ensure the service life and the use effect, can effectively solve the problem of temporary hydrophobicity, can be temporarily adhered to water Liang Biban, reduces the construction difficulty, has extremely low heat conductivity coefficient, and can effectively ensure the reduction of heat loss. The patent also cannot solve the problems of long construction period, large construction quality fluctuation, and cracking and damage caused by anchor heat island effect and stress concentration caused by the construction mode of the anchor and the castable.
In summary, the dual composite structure of refractory fiber blanket and silicon aluminum self-flow castable adopted by the traditional water beam and column heat insulation structure has the problems of long construction time, large fluctuation of construction quality, poor heat insulation performance and ferrous silicate erosion resistance, short service life and the like, while the patent proposes that the refractory heat insulation lining adopts a heat preservation layer and slag adhesion prevention layer double-layer structure, the phenomenon of high-temperature slag adhesion is reduced, but most of the other problems are still unsolved, and in addition, some of the invention patent explores the prefabricated member heat insulation form, but the problems of insufficient high-temperature service performance and heat insulation performance, difficult ferrous silicate melt erosion resistance, mismatching of thermal expansion among heat insulation components, concentrated stress and the like still exist, so that the dual-water pipe column heat insulation structure for the high-temperature oriented silicon steel is necessary to be further researched, and the comprehensive aims of improving the column heat insulation and ferrous silicate melt erosion resistance, reducing the energy consumption of a heating furnace, prolonging the service life of the column heat insulation lining, shortening the construction time and the like are achieved on the premise of guaranteeing the high-temperature service performance of the dual-water pipe column heat insulation structure for the high-temperature oriented silicon steel.
Disclosure of Invention
In order to overcome the defects of the technology, the invention provides the double-water pipe column heat insulation structure of the heating furnace for the high-temperature oriented silicon steel and the preparation method thereof, which can achieve the comprehensive aims of improving the column heat insulation and the corrosion resistance of ferrous silicate melt, reducing the energy consumption of the heating furnace, prolonging the service life of the column heat insulation structure, shortening the construction time and the like.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the double-water pipe column heat insulation structure of the heating furnace for the high-temperature oriented silicon steel comprises a heating furnace column connected between the bottom of the heating furnace and a beam heat insulation lining, wherein the heating furnace column comprises double water-cooling steel pipes, each double water-cooling steel pipe consists of two water-cooling steel pipes connected by flat steel, and the outer side of each double water-cooling steel pipe is sequentially coated with a nano micropore heat insulation plate layer, a refractory fiber blanket layer, a thermal expansion fastening compensation layer and a calcium hexaaluminate refractory material prefabricated part layer from inside to outside; the calcium hexaaluminate refractory material prefabricated part layer comprises the following main chemical components in percentage by mass: al (Al) 2 O 3 88-92％，CaO 7-11％，SiO 2 <1.5％，Fe 2 O 3 <1.0%, the balance being unavoidable impurities; the performance indexes of the calcium hexaluminate refractory material prefabricated part layer are as follows: the density is 1.9-2.5g/cm 3 The normal temperature compressive strength (1300 ℃ multiplied by 3 h) is more than or equal to 35MPa, and the heat conductivity coefficient is less than or equal to 0.55W/m.K (the hot surface temperature is 800 ℃); the main crystal phase in the calcium hexaaluminate refractory material prefabricated part layer is CaAl 12 O 19 The content is more than or equal to 80 weight percent.
Preferably, the calcium hexaluminate refractory material prefabricated part layer is formed by splicing and piling a group of bottom elliptical annular prefabricated parts and a plurality of groups of upper elliptical annular prefabricated parts in sequence.
Preferably, the bottom elliptical ring-shaped prefabricated member is formed by mutually combining and mortise-tenon jointing two first prefabricated members and two second prefabricated members;
the first prefabricated member is of a semi-annular structure, the bottom of the first prefabricated member is a plane and is in contact with the bottom of the heating furnace, a first arc tenon is arranged in the middle of the top of the first prefabricated member, and a first strip tenon and a first strip mortise are respectively arranged in the middle of two ends of the first prefabricated member;
one side of the second prefabricated member is a plane, the other side of the second prefabricated member protrudes to be matched with a concave surface in the middle of the double water-cooled steel pipe, the bottom of the second prefabricated member is a plane and is in contact with the bottom of the heating furnace, a first tenon is arranged in the middle of the top of the second prefabricated member, and a second strip tenon and a second strip mortise are respectively arranged in the middle of two ends of the second prefabricated member;
the bottom elliptical ring-shaped prefabricated part can be formed by sequentially mortise and tenon splicing one piece of the first prefabricated part, one piece of the second prefabricated part, the other piece of the first prefabricated part and the other piece of the second prefabricated part.
Preferably, the upper elliptical prefabricated part is formed by mutually combining and mortise-tenon jointing two third prefabricated parts and two fourth prefabricated parts;
the third prefabricated member is of a semi-annular structure, an arc mortise is formed in the middle of the bottom of the third prefabricated member, a second arc tenon is formed in the middle of the top of the third prefabricated member, and a third strip tenon and a third strip mortise are respectively formed in the middle of the two ends of the third prefabricated member;
One side of the fourth prefabricated member is a plane, the other side of the fourth prefabricated member protrudes out to be matched with a concave surface in the middle of the double water-cooled steel pipe, a first mortise is formed in the middle of the bottom of the fourth prefabricated member, a second tenon is formed in the middle of the top of the fourth prefabricated member, and a fourth strip-shaped tenon and a fourth strip-shaped mortise are respectively formed in the middle of two ends of the fourth prefabricated member;
and the upper elliptical ring-shaped prefabricated part can be formed by sequentially mortise and tenon splicing one piece of the third prefabricated part, one piece of the fourth prefabricated part, the other piece of the third prefabricated part and the other piece of the fourth prefabricated part.
Preferably, the bottom elliptical ring-shaped prefabricated member is spliced with the upper and lower mortise and tenon of the adjacent upper elliptical ring-shaped prefabricated member through the first arc tenon and the first tenon of the bottom elliptical ring-shaped prefabricated member respectively spliced with the arc mortise and the first mortise of the adjacent upper elliptical ring-shaped prefabricated member; the upper layer elliptical prefabricated member is spliced with the upper and lower mortise and tenon of the adjacent upper layer elliptical prefabricated member through the arc mortise and the first mortise at the bottom of the upper layer elliptical prefabricated member and the second arc tenon and the second tenon of the adjacent upper layer elliptical prefabricated member.
Preferably, the thermal expansion fastening compensation layer is formed by thermal expansion growth of a thermal expansion coating by itself; the thermal expansion coating is coated on the inner side of the calcium hexaaluminate refractory material prefabricated part layer and comprises the following components in percentage by mass: 25-40% of self-crosslinking acrylic emulsion, 10-20% of ammonium polyphosphate (the polymerization degree is more than or equal to 1000), 2-5% of dipentaerythritol, 5-10% of melamine, 15-30% of calcium hexaluminate ultrafine powder (the granularity is less than or equal to 10 mu m) and 15-25% of deionized water.
Preferably, the refractory fiber blanket layer is formed by wrapping and splicing a single-layer refractory fiber blanket, and Z-shaped right-angle steps are arranged at splicing positions of two ends.
Preferably, the nano microporous heat insulation plate layer is formed by splicing two continuous double semi-annular columnar nano microporous heat insulation plates, and Z-shaped right-angle steps are arranged at the splicing positions of the two ends.
A preparation method of a double-water pipe column heat insulation structure of a heating furnace for high-temperature oriented silicon steel is characterized by comprising the following steps: after wrapping the nano micropore heat insulation plate layer and the refractory fiber blanket layer, compacting and fixing the refractory fiber blanket layer by adopting a heat preservation layer compaction and fixing die, then constructing a prefabricated part layer of calcium hexaluminate refractory material, and after the construction and the construction of each prefabricated part layer of calcium hexaluminate refractory material are completed, moving the heat preservation layer compaction and fixing die upwards for one section; the compaction and fixation mould for the heat preservation layer is formed by hinging and combining two symmetrical mould parts, the outline of the compaction and fixation mould is consistent with the cross section shape of the double water-cooling steel pipe, the compaction and fixation mould can be opened from one side, and can be locked by a button after being closed.
Preferably, the method specifically comprises the following steps:
1) Coating the inner sides of all the first prefabricated part, the second prefabricated part, the third prefabricated part and the fourth prefabricated part with a thermal expansion coating, wherein the thermal expansion coating can form a thermal expansion fastening compensation layer when being heated during working, and drying the coated materials in shade at normal temperature;
2) Cleaning the surface of a double water-cooled steel pipe serving as a heating furnace upright post foundation;
3) Wrapping a layer of nano microporous heat insulation plate with Z-shaped right-angle steps at splicing positions at two ends outside the double water-cooled steel pipe, and wrapping and fixing the nano microporous heat insulation plate by adopting a plastic film to form a nano microporous heat insulation plate layer;
4) Wrapping a layer of refractory fiber blanket with Z-shaped right-angle steps at splicing positions at two ends on the periphery of the nano microporous heat insulation plate layer to form a refractory fiber blanket layer, opening a compaction fixing die for the heat insulation layer, wrapping and compacting the outside of the refractory fiber blanket layer, and locking and fixing by using a button to control the compression amount of the refractory fiber blanket to be 10-20%;
5) The method comprises the steps of installing two second prefabricated members with inner side coated with thermal expansion coatings in a concave part in the middle of the double water-cooled steel pipe wrapped with a nano micropore heat insulation plate layer and a refractory fiber blanket layer and placing the second prefabricated members at the bottom of the double water-cooled steel pipe, splicing one first prefabricated member with inner side coated with the thermal expansion coatings from each mortise and tenon on the left side and each mortise and tenon on the right side to form a bottom elliptical annular prefabricated member, contacting the bottom of a heating furnace, drawing out a heat insulation layer solid fixed die upwards, and moving the heat insulation layer solid fixed die to the outer wall of the next refractory fiber blanket layer;
6) Placing a fourth prefabricated member with the inner side coated with the thermal expansion coating in a concave position in the middle of a double water-cooling steel pipe wrapped with a nano micropore heat insulation plate layer and a fireproof fiber blanket layer and on the bottom elliptical prefabricated member, splicing a third prefabricated member with the inner side coated with the thermal expansion coating from each mortise and tenon on the left side and each mortise and tenon on the right side to form an upper elliptical prefabricated member, splicing and installing the upper elliptical prefabricated member with the lower mortise and tenon on the bottom elliptical prefabricated member, drawing out a heat insulation layer solid fixed die upwards, and moving the heat insulation layer solid fixed die to the outer wall of the next fireproof fiber blanket layer;
7) Then, placing the fourth prefabricated members with the inner side coated with the thermal expansion coating in the concave part in the middle of the double water-cooling steel pipe wrapped with the nano micropore heat insulation plate layer and the fireproof fiber blanket layer and on the front upper elliptical prefabricated member, splicing one third prefabricated member with the inner side coated with the thermal expansion coating from each mortise and tenon on the left side and the right side to form the other upper elliptical prefabricated member, splicing and installing the upper elliptical prefabricated member on the upper elliptical prefabricated member in front by the upper mortise and tenon, drawing out the heat insulation layer solid fixed die upwards, and moving the heat insulation layer solid fixed die to the outer wall of the next fireproof fiber blanket layer;
8) Repeating the step 7), continuously installing an upper elliptical ring prefabricated member upwards, continuously repeating the step 7) after laying an expansion joint of 3-5mm at the position of about half the height of the double water-cooled steel pipe, laying the double water-cooled steel pipe to the top of the double water-cooled steel pipe, and drawing out an insulating layer for compacting and fixing a die, thereby completing the manufacture of the stand column of the heating furnace;
9) After maintenance for 12 hours, completing construction of a beam heat insulation lining connected with the top of the stand column of the heating furnace according to a refractory fiber blanket and self-flow castable double heat insulation lining manufacturing method, and finally forming an integral water beam and stand column heat insulation structure of the heating furnace;
And the contact surfaces of mortise and tenon splicing and piling are bonded and sealed by high-temperature refractory mortar.
Compared with the prior art, the invention has the beneficial effects that:
the double-water pipe column heat insulation structure of the heating furnace for the high-temperature oriented silicon steel provided by the invention not only can be used for a conventional hot rolling heating furnace, but also is particularly suitable for the heating furnace for the high-temperature oriented silicon steel. According to the invention, through the use of the calcium hexaluminate prefabricated member working lining, the corrosion resistance and the heat insulation performance of ferrous silicate melt are improved, through the optimal arrangement of the multi-layer heat insulation materials with different use temperature ranges, the heat insulation performance and the high-temperature use performance of the stand column are improved, through the joint design of the mortise and tenon structure and the thermal expansion self-locking structure, the problems of mismatching of thermal expansion of materials, stress concentration damage, heat island effect and the like caused by the anchor and the metal fixing block are solved, and the heat insulation material has the advantages of excellent heat insulation performance, corrosion resistance of ferrous silicate melt, short construction time and the like.
By selecting calcium hexaaluminate refractory material as the hot surface working layer of the upright post, compared with the conventional water beam using Al 2 O 3 -SiO 2 For self-flowing castable, due to CaO-Al 2 O 3 The refractory material of the series material does not contain SiO 2 Can avoid iron scale and SiO 2 The reaction generates a low melting phase, and the corrosion problem of a large amount of molten ferrous silicate on the upright column generated in the process of producing high-temperature oriented silicon steel is solved by utilizing the excellent characteristic of ferrous silicate corrosion resistance of the calcium hexaluminate material; meanwhile, the hexagonal flaky micropore structure which is interwoven with the material and has slightly reduced heat conduction coefficient along with the temperature rise of the calcium hexaluminate refractory material is fully utilized, so that the heat insulation performance of the material under the high-temperature use condition is improved.
The prefabricated part layer of the calcium hexaluminate refractory material adopts the joint design of mortise and tenon splicing, refractory mortar bonding sealing and thermal expansion fastening compensation layer self-locking structure, replaces the casting material pouring maintenance molding mode in the prior art, eliminates the problems of material thermal expansion mismatch, stress concentration damage, heat island effect and the like caused by the metal anchoring piece and the metal fixing block, simultaneously eliminates a series of construction flows of casting material supporting mould, pouring, maintenance and baking, greatly shortens the manufacturing construction time of the stand column heat insulation lining of the heating furnace, reduces the number of times of shutdown maintenance and improves the production efficiency.
According to the different temperatures of the heat-insulating layer in different areas, the double-layer design of the refractory fiber blanket and the nano microporous heat-insulating plate is optimized and selected, the heat-insulating performance of the upright post is further improved, the high-temperature resistance and the low heat conductivity coefficient of the refractory fiber blanket are fully utilized as the transition heat-insulating layer close to the prefabricated part of the hot-surface working layer, when the working temperature is reduced to the area below 500 ℃, the characteristic of the ultra-low heat conductivity coefficient of the nano microporous heat-insulating plate is utilized, the nano microporous heat-insulating plate works in the working temperature range with optimal performance, the excellent heat-insulating performance of the nano microporous heat-insulating plate is ensured to be kept all the time in the long-term use process, and the performance degradation and attenuation are effectively prevented.
Through the design of the Z-shaped right-angle steps at the splicing positions of the two ends of the refractory fiber blanket and the nano microporous thermal insulation board, the problem that the size of an overlapped area caused by conventional overlapping seam construction is increased to influence the outer circular size deviation of the column thermal insulation layer cylinder is avoided, and the aim of weakening the influence of the splicing seam is fulfilled. Meanwhile, the fixing and compacting of the refractory fiber blanket are carried out through the heat-insulating layer compacting and fixing die, so that the problem that the special-shaped areas of the double water pipes are difficult to compact and fix under the condition that anchoring pieces are not arranged is solved.
Through the design of the thermal expansion fastening compensation layer, the calcium hexaluminate ultrafine powder is used as a filler, the combination of ammonium polyphosphate, dipentaerythritol and melamine is used as a foaming expansion agent, and the porous calcium hexaluminate thermal expansion fastening compensation layer is formed by utilizing the volume expansion generated by the thermal expansion coating when the temperature is increased (more than or equal to 300 ℃), has a lower heat conductivity coefficient, can fill the gap between a hot surface prefabricated member and the heat preservation layer, further compacts a refractory fiber blanket, and improves the overall performance, the heat insulation performance and the service life of the heating furnace upright post multilayer heat insulation lining structure.
According to the invention, only four prefabricated members are used for realizing the splicing of the prefabricated member layers of the calcium hexaluminate refractory material in the double-water-pipe column heat insulation structure of the heating furnace for high-temperature oriented silicon steel, wherein the prefabricated member I and the prefabricated member III can be directly used for splicing the prefabricated member layers of the calcium hexaluminate refractory material of the single-water-pipe column heat insulation structure, and under the condition that the single-water-pipe column heat insulation structure and the double-water-pipe column heat insulation structure are required to be prepared at the same time, the types of the prefabricated members are reduced, the manufacturing cost of a die is reduced, the warehouse storage management is simplified, and the overall manufacturing cost is reduced.
Drawings
FIG. 1 is a schematic view of a double-water pipe column heat insulation structure of a heating furnace for high-temperature oriented silicon steel in an embodiment of the invention.
FIG. 2 is a schematic A-A cross-sectional view of the bottom elliptical ring preform of FIG. 1.
FIG. 3 is a schematic view of section C-C of FIG. 2.
FIG. 4 is a schematic view in section B-B of the upper elliptical ring preform of FIG. 1.
Fig. 5 is a schematic view of section D-D of fig. 4.
Fig. 6 is a schematic three-dimensional structure of the first preform of fig. 2.
Fig. 7 and 8 are schematic views of the three-dimensional structure of the second preform in fig. 2.
Fig. 9 is a schematic three-dimensional structure of the third preform of fig. 4.
Fig. 10 is a front view of the third preform of fig. 9.
Fig. 11 is a top view of the third preform of fig. 10.
Fig. 12 and 13 are schematic three-dimensional structures of the fourth preform of fig. 4.
Fig. 14 is a top view of the fourth preform of fig. 12.
Fig. 15 is a schematic view showing an open/close state of the insulating layer compacting and fixing mold.
Reference numerals: the heat-insulating layer comprises a calcium hexaluminate refractory material prefabricated part layer 1 (comprising a bottom elliptical ring-shaped prefabricated part 1.1 and an upper elliptical ring-shaped prefabricated part 1.2), a thermal expansion fastening compensation layer 2, a refractory fiber blanket layer 3, a nano micropore heat-insulating plate layer 4, a double water-cooling steel pipe 5, a heating furnace bottom 6, a heat-insulating layer solid fixed die 7, a heating furnace upright post 8 and a cross beam heat-insulating lining 9;
The bottom elliptical ring-shaped prefabricated part 1.1 comprises a first prefabricated part 1.11 (wherein a first arc tenon 1.11a, a first strip tenon 1.11b and a first strip mortise 1.11 c), and a second prefabricated part 1.12 (wherein a first tenon 1.12a, a second strip mortise 1.12b and a second strip tenon 1.12 c);
the upper elliptical ring-shaped prefabricated part 1.2 comprises a third prefabricated part 1.21 (an arc-shaped mortise 1.21a, a second arc-shaped tenon 1.21b, a third strip-shaped tenon 1.21c and a third strip-shaped mortise 1.21 d), and a fourth prefabricated part 1.22 (a first mortise 1.22a, a second tenon 1.22b, a fourth strip-shaped mortise 1.22c and a fourth strip-shaped tenon 1.22 d).
Detailed Description
For a better explanation of the present invention, the main content of the present invention is further elucidated below in conjunction with the specific examples, but the content of the present invention is not limited to the following examples only.
As shown in figures 1-14, the invention relates to a double-water-pipe column heat insulation structure of a heating furnace for high-temperature oriented silicon steel, which forms a heating furnace column 8 connected between a heating furnace bottom 6 and a beam heat insulation lining 9, wherein the heating furnace column 8 comprises double-water-cooling steel pipes 5, each double-water-cooling steel pipe 5 consists of two water-cooling steel pipes connected by flat steel, and the outer side of each double-water-cooling steel pipe 5 consists of The nano microporous heat insulation plate layer 4, the refractory fiber blanket layer 3, the thermal expansion fastening compensation layer 2 and the calcium hexaluminate refractory material prefabricated part layer 1 are sequentially coated from inside to outside. The integral heat insulation structure does not adopt metal anchoring pieces or fixed blocks. The calcium hexaluminate refractory material prefabricated part layer 1 comprises the following main chemical components in percentage by mass: al (Al) 2 O 3 88-92％、CaO 7-11％、SiO 2 <1.5％、Fe 2 O 3 <1.0%, the balance being unavoidable impurities; the performance indexes of the calcium hexaluminate refractory material prefabricated part layer 1 are as follows: the density is 1.9-2.5g/cm 3 The normal temperature compressive strength (1300 ℃ multiplied by 3 h) is more than or equal to 35MPa, and the heat conductivity coefficient is less than or equal to 0.55W/m.K (the hot surface temperature is 800 ℃); the main crystal phase in the calcium hexaaluminate refractory material prefabricated part layer 1 is CaAl 12 O 19 The content is more than or equal to 80 weight percent.
The calcium hexaluminate refractory material prefabricated part layer 1 is formed by splicing and piling a group of bottom elliptical annular prefabricated parts 1.1 and a plurality of groups of upper elliptical annular prefabricated parts 1.2 in sequence in a mortise-tenon manner. The heights of the bottom elliptical ring prefabricated part 1.1 and the upper elliptical ring prefabricated part 1.2 are 60-300mm, and the thicknesses are 50-80mm.
The bottom elliptical ring-shaped prefabricated part 1.1 is formed by mutually combining and mortise-tenon jointing two first prefabricated parts 1.11 and two second prefabricated parts 1.12; the first prefabricated member 1.11 is of a semi-annular structure, the bottom of the first prefabricated member is a plane and is in contact with the bottom 6 of the heating furnace, a first arc tenon 1.11a is arranged in the middle of the top of the first prefabricated member, and a first strip tenon 1.11b and a first strip mortise 1.11c are respectively arranged in the middle of two ends of the first prefabricated member; one side of the second prefabricated member 1.12 is a plane, the other side of the second prefabricated member protrudes to be matched with a concave surface in the middle of the double water-cooled steel pipe 5, the bottom of the second prefabricated member is a plane and is in contact with the bottom 6 of the heating furnace, a first tenon 1.12a is arranged in the middle of the top of the second prefabricated member, and a second strip tenon 1.12c and a second strip mortise 1.12b are respectively arranged in the middle of two ends of the second prefabricated member.
The bottom elliptical ring-shaped prefabricated part 1.1 is formed by sequentially mortise and tenon splicing a first prefabricated part 1.11, a second prefabricated part 1.12, another first prefabricated part 1.11 and another second prefabricated part 1.12.
The upper elliptical ring prefabricated part 1.2 is formed by mutually combining and mortise-tenon jointing two third prefabricated parts 1.21 and two fourth prefabricated parts 1.22; the third prefabricated member 1.21 is of a semi-annular structure, an arc mortise 1.21a is arranged in the middle of the bottom, a second arc tenon 1.21b is arranged in the middle of the top, and a third strip tenon 1.21c and a third strip mortise 1.21d are respectively arranged in the middle of the two ends; one side of the fourth prefabricated member 1.22 is a plane, the other side of the fourth prefabricated member protrudes to be matched with a concave surface in the middle of the double water-cooled steel pipe 5, a first mortise 1.22a is arranged in the middle of the bottom of the fourth prefabricated member, a second tenon 1.22b is arranged in the middle of the top of the fourth prefabricated member, and a fourth strip tenon 1.22d and a fourth strip mortise 1.22c are respectively arranged in the middle of two ends of the fourth prefabricated member.
An upper elliptical ring-shaped prefabricated part 1.2 is formed by sequentially mortise and tenon splicing a third prefabricated part 1.21, a fourth prefabricated part 1.22, another third prefabricated part 1.21 and another fourth prefabricated part 1.22.
The bottom elliptical ring-shaped prefabricated part 1.1 is spliced with the upper and lower mortise and tenon of the adjacent upper elliptical ring-shaped prefabricated part 1.2 through the arc mortise 1.21a and the first mortise 1.22a of the first arc tenon 1.11a and the first tenon 1.12a of the bottom elliptical ring-shaped prefabricated part respectively; the upper elliptical ring-shaped prefabricated member 1.2 is spliced with the upper elliptical ring-shaped prefabricated member 1.2 adjacent to the upper elliptical ring-shaped prefabricated member 1.2 through the second arc tenon 1.21b and the second tenon 1.22b of the upper elliptical ring-shaped prefabricated member 1.2 adjacent to the upper elliptical ring-shaped prefabricated member 1.2 through the arc mortise 1.21a and the first mortise 1.22a at the bottom of the upper elliptical ring-shaped prefabricated member.
The cross sections of the tenons and the mortise are semicircular, and the semicircular diameters of the cross sections of the tenons are smaller than those of the mortise spliced by the tenons by 2-5mm.
The contact surfaces of mortise and tenon splicing and piling are bonded and sealed by high-temperature refractory mortar; the high-temperature refractory mortar is air hardening refractory mortar, and the highest use temperature (under the oxidizing atmosphere) is more than or equal to 1500 ℃; the high-temperature refractory mortar is TJM air hardening refractory mortar produced by Morgan thermal ceramics Co.
The thickness of the thermal expansion fastening compensation layer 2 is 3-5mm, and the thermal expansion fastening compensation layer is formed by self-heating expansion growth of a thermal expansion coating when the temperature exceeds 300 ℃; the thermal expansion coating is coated on the inner side of the calcium hexaaluminate refractory material prefabricated part layer 1, and the thickness is 0.2-1mm, and comprises the following components in percentage by mass: 25-40% of self-crosslinking acrylic emulsion, 10-20% of ammonium polyphosphate (the polymerization degree is more than or equal to 1000), 2-5% of dipentaerythritol, 5-10% of melamine, 15-30% of calcium hexaluminate ultrafine powder (the granularity is less than or equal to 10 mu m) and 15-25% of deionized water.
The thickness of the refractory fiber blanket layer 3 is 20-35mm, the refractory fiber blanket is formed by wrapping and splicing single-layer refractory fiber blankets, Z-shaped right-angle steps are arranged at the splicing positions of the two ends, and the influence of a splicing gap is weakened; the performance indexes of the refractory fiber blanket material are as follows: density 160kg/m 3 The use temperature is more than or equal to 1100 ℃, the slag ball content is less than or equal to 10%, and the heat conductivity coefficient is less than or equal to 0.18W/m.K (the hot surface temperature is 800 ℃); the refractory fiber blanket is one of a high aluminum silicate refractory fiber blanket, a zirconium-containing aluminum silicate refractory fiber blanket or an alkaline earth metal refractory fiber blanket.
The thickness of the nano microporous heat insulation plate layer 4 is 5-10mm, and the nano microporous heat insulation plate is formed by splicing two continuous double semi-annular columnar nano microporous heat insulation plates, and Z-shaped right-angle steps are arranged at the splicing positions of the two ends, so that the influence of a splicing gap is weakened; the performance indexes of the nano microporous thermal insulation board material are as follows: the density is less than or equal to 0.45g/cm 3 The heat conductivity coefficient is less than or equal to 0.05W/m.K (the temperature of a hot surface is 800 ℃), the normal-temperature compressive strength is more than or equal to 0.4MPa, and the shrinkage rate is less than or equal to 0.4% (1000 ℃ C. Multiplied by 24 h).
The preparation method of the heating furnace double-water-pipe column heat insulation structure for the high-temperature oriented silicon steel comprises the steps of after wrapping a nano micropore heat insulation plate layer 4 and a refractory fiber blanket layer 3, compacting and fixing the refractory fiber blanket layer 3 by adopting a heat insulation layer compacting and fixing die 7, then constructing a prefabricated part layer 1 of calcium hexaluminate refractory material, and after construction and masonry of each prefabricated part of calcium hexaluminate refractory material are completed, moving the heat insulation layer compacting and fixing die 7 to the upper section; the heat-insulating layer compacting and fixing mold 7 is formed by hinging and combining two symmetrical mold parts, the outer contour of the heat-insulating layer compacting and fixing mold is consistent with the cross section shape of the double water-cooling steel pipe 5, as shown in fig. 15, the heat-insulating layer compacting and fixing mold 7 is made of PVC, the thickness is 1-2mm, the heat-insulating layer compacting and fixing mold can be opened from one side, and the heat-insulating layer compacting and fixing mold can be locked by a button after being folded.
The preparation method specifically comprises the following steps:
1) The inner sides of all the first prefabricated part 1.11, the second prefabricated part 1.12, the third prefabricated part 1.21 and the fourth prefabricated part 1.22 are coated with a thermal expansion coating, a thermal expansion fastening compensation layer 2 is formed when the thermal expansion coating is heated during working, and the coated materials are dried in shade at normal temperature, wherein the drying time is more than or equal to 12 hours;
2) Cleaning floating dust and rust on the surface of the double water-cooled steel pipe 5 serving as a base of the heating furnace upright post 8 by using a steel brush;
3) A layer of nano microporous heat insulation board with Z-shaped right-angle steps at the splicing positions at two ends is wrapped outside the double water-cooled steel pipe 5, and is wrapped and fixed by a plastic film to form a nano microporous heat insulation board layer 4;
4) Wrapping a layer of refractory fiber blanket with Z-shaped right-angle steps at splicing positions at two ends around the nano microporous heat insulation plate layer 4 to form a refractory fiber blanket layer 3, opening a heat-insulating layer compaction fixing die 7, wrapping and compacting the outside of the refractory fiber blanket layer 3, and locking and fixing by using a button to control the compression amount of the refractory fiber blanket to be 10-20%;
5) The method comprises the steps of (1) mounting two first prefabricated members 1.11 with heat expansion coatings coated on the inner sides and two second prefabricated members 1.12 with heat expansion coatings coated on the inner sides, respectively coating high-temperature fireproof mortar on the bottoms and the tops of the two first prefabricated members 1.12 and the two ends of the two second prefabricated members, firstly, mounting the two second prefabricated members 1.12 in a concave part in the middle of a double water-cooled steel pipe 5 wrapped with a nano micropore heat insulation plate layer 4 and a fireproof fiber blanket layer 3 and placing the two second prefabricated members in the position of a heating furnace bottom 6, respectively splicing one first prefabricated member 1.11 from each mortise on the left and the right, splicing the second strip-shaped tenon 1.12c and the second strip-shaped mortise 1.12b of one second prefabricated member 1.12 with the first strip-shaped mortise 1.11c of one first prefabricated member 1.11 and the first strip-shaped tenon 1.11b of the other first prefabricated member 1.11, splicing the two first prefabricated members 1.11 and forming a bottom elliptical annular prefabricated member 1.1, respectively, pulling out the bottom elliptical annular prefabricated member 1.1 to be in contact with the heating furnace bottom 6, bonding the second prefabricated member 1.12 to the fireproof fiber blanket layer and fixing the same to the lower heat insulation layer 7 by high-temperature lamination;
6) The top and two ends of the two third prefabricated parts 1.21 with the inner side coated with the thermal expansion coating and the two fourth prefabricated parts 1.22 with the inner side coated with the thermal expansion coating are coated with high-temperature refractory mortar, the two fourth prefabricated parts 1.22 are firstly placed in the concave part in the middle of the double water-cooled steel pipe 5 wrapped with the nano microporous heat insulation plate layer 4 and the refractory fiber blanket layer 3 and are placed on the bottom elliptical annular prefabricated parts 1.1, one third prefabricated part 1.21 is spliced from each mortise and tenon on the left side and the right side respectively, the fourth strip-shaped tenons 1.22d and the fourth strip-shaped mortise 1.22c of one fourth prefabricated member 1.22 are respectively spliced with the third strip-shaped mortise 1.21d of one third prefabricated member 1.21 and the third strip-shaped tenons 1.21c of the other third prefabricated member 1.21, two third prefabricated members 1.21 and two fourth prefabricated members 1.22 form an upper elliptical annular prefabricated member 1.2, the upper elliptical annular prefabricated member 1.2 is spliced and installed on the upper and lower mortise of the bottom elliptical annular prefabricated member 1.1, and the heat-preservation layer solid fixed die 7 is pulled upwards through high-temperature refractory cement bonding and sealing and is moved to the outer wall of the next refractory fiber blanket layer 3;
7) Continuously coating the tops and the two ends of the two third prefabricated members 1.21 with the inner side coated with the thermal expansion coating and the two fourth prefabricated members 1.22 with the inner side coated with the thermal expansion coating with high-temperature refractory mortar, firstly placing the two fourth prefabricated members 1.22 at the concave part in the middle of the double water-cooled steel pipe 5 wrapped with the nano micropore heat insulation plate layer 4 and the refractory fiber blanket layer 3 and on the upper elliptical annular prefabricated member 1.2 in front, splicing one third prefabricated member 1.21 from each mortise on the left and right, respectively splicing the fourth strip-shaped tenon 1.22d and the fourth strip-shaped mortise 1.22c of one fourth prefabricated member 1.22 with the third strip-shaped mortise 1.21d of one third prefabricated member 1.21 and the third strip-shaped tenon 1.21c of the other third prefabricated member 1.21, splicing the two third prefabricated members 1.21 and the two fourth prefabricated members 1.22 into the other upper elliptical annular prefabricated member 1.2, respectively, and installing the upper annular prefabricated member 1.2 on the upper annular prefabricated member and the front of the upper elliptical annular prefabricated member 1.2 to the upper sealing surface of the refractory fiber blanket layer 3, and fixing the upper sealing the upper surface of the upper and lower annular prefabricated member through the high-temperature sealing die 7;
8) Repeating the step 7), continuously installing an upper elliptical ring prefabricated member 1.2 upwards, continuously repeating the step 7) after the ceramic fiber paper is adopted to set an expansion joint of 3-5mm at the position of about half the height of the double water-cooled steel pipe 5, building the double water-cooled steel pipe 5, extracting a heat-insulating layer compaction fixing die 7, and finishing the manufacture of the heating furnace upright post 8;
9) After maintenance for 12 hours, the construction of the beam heat insulation lining 9 connected with the top of the heating furnace upright post 8 is completed according to the conventional refractory fiber blanket and self-flowing castable double heat insulation lining manufacturing method, and finally the construction of the whole water beam and upright post heat insulation lining of the heating furnace is completed.
The following are the two water pipe column heat insulation structures of the heating furnace for high temperature oriented silicon steel with slightly different sizes and materials:
example 1
The specific parameters of the dimensions and materials of the components in this embodiment are as follows:
the outer diameter of the single water-cooled steel pipe constituting the double water-cooled steel pipe 5 is 140mm and the height is 1800mm.
The heights of the bottom elliptical ring-shaped prefabricated part 1.1 and the upper elliptical ring-shaped prefabricated part 1.2 which form the calcium hexaaluminate refractory material prefabricated part layer 1 are 76mm, and the thicknesses are 60mm. The semicircular diameters of the cross sections of the tenons and the mortise are 17 mm and 20mm respectively.
The calcium hexaluminate refractory prefabricated part mainly comprises the following chemical components in percentage by mass: al (Al) 2 O 3 ：89.54％、CaO：8.27％、SiO 2 ：0.94％、Fe 2 O 3 :0.60%, the balance being unavoidable impurities; the main performance indexes are as follows: the normal temperature compressive strength (1300 ℃ C. Multiplied by 3 h) is 35.6MPa, the heat conductivity coefficient is 0.35W/m.K (the hot surface temperature is 800 ℃), and the density is 1.98g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The main crystal phase in the calcium hexaaluminate refractory material prefabricated part is CaAl 12 O 19 The content was 82.3wt%.
The high-temperature refractory mortar is TJM air hardening refractory mortar produced by Morgan thermal ceramics Co., ltd, and the highest use temperature (under oxidizing atmosphere) is more than or equal to 1500 ℃.
The thermal expansion fastening compensation layer 2 has a thickness of 3mm. The thickness of the thermal expansion coating is 0.5mm, and the components and mass percent content are as follows: 30% of self-crosslinking acrylic emulsion, 15% of ammonium polyphosphate (with the polymerization degree of more than or equal to 1000), 4% of dipentaerythritol, 6% of melamine, 30% of calcium hexaaluminate ultrafine powder (with the granularity of less than or equal to 10 mu m) and 15% of deionized water.
The thickness of the refractory fiber blanket layer 3 is 20mm, and the refractory fiber blanket layer is formed by wrapping, compacting and splicing refractory fiber blankets with the thickness of 25 mm. The refractory fiber blanket adopts an alkaline earth metal refractory fiber blanket-super cotton Prime blanket produced by Morgan thermal ceramic Co., ltd, and the density is 160kg/m 3 The use temperature is 1150 ℃, the slag ball content is less than or equal to 5 percent, the heat conductivity coefficient is 0.18W/m.K (the hot surface temperature is 800 ℃), and the heat-conducting material has the advantages of low heat conduction, environmental protection and no cancer.
The thickness of the nano microporous heat insulation plate layer 4 is 5mm. The nanometer microporous thermal insulation board adopts WDS microporous thermal insulation board produced by Morgan thermal ceramics Co., ltd, and has density of 0.36g/cm 3 The heat conductivity coefficient is 0.044W/m.K (the temperature of a hot surface is 800 ℃), the normal-temperature compressive strength is 0.5MPa, and the shrinkage rate is 0.3% (1000 ℃ C. Multiplied by 24 h).
In the process of preparing the calcium hexaaluminate refractory prefabricated part layer 1, the height of the set expansion joint is 3mm.
The thickness of the insulating layer compacting and fixing mold 7 is 1mm.
Example 2
The specific parameters of the dimensions and materials of the components in this embodiment are as follows:
the outer diameter of the single water-cooled steel pipe constituting the double water-cooled steel pipe 5 is 194mm and the height is 2000mm.
The heights of the bottom elliptical ring-shaped prefabricated part 1.1 and the upper elliptical ring-shaped prefabricated part 1.2 which form the calcium hexaaluminate refractory material prefabricated part layer 1 are 150mm, and the thicknesses are 70mm. The semicircular diameters of the cross sections of the tenons and the mortise are 17 mm and 20mm respectively.
The calcium hexaluminate refractory prefabricated part comprises the following chemical components in percentage by mass: al (Al) 2 O 3 ：88.2％、CaO：10.5％、SiO 2 ：0.42％、Fe 2 O 3 :0.43%, the balance being unavoidable impurities; the main performance indexes of the calcium hexaluminate refractory material prefabricated part are as follows: the normal temperature compressive strength (1300 ℃ C. Multiplied by 3 h) is 59.7MPa, the heat conductivity coefficient is 0.44W/m.K (the hot surface temperature is 800 ℃), and the density is 2.32g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The main crystal phase in the calcium hexaaluminate refractory material prefabricated part is CaAl 12 O 19 84.6wt%.
The high-temperature refractory mortar is TJM air hardening refractory mortar produced by Morgan thermal ceramics Co., ltd, and the highest use temperature (under oxidizing atmosphere) is more than or equal to 1500 ℃.
The thickness of the thermal expansion fastening compensation layer 2 is 4mm; the thickness of the thermal expansion coating is 0.6mm, and the components and mass percent content are as follows: 40% of self-crosslinking acrylic emulsion, 10% of ammonium polyphosphate (with the polymerization degree of more than or equal to 1000), 2% of dipentaerythritol, 5% of melamine, 25% of calcium hexaaluminate ultrafine powder (with the granularity of less than or equal to 10 mu m) and 18% of deionized water.
The thickness of the refractory fiber blanket layer 3 is 35mm, and the refractory fiber blanket layer is formed by wrapping, compacting and splicing refractory fiber blankets with the thickness of 40 mm; the refractory fiber blanket is a high-alumina aluminum silicate fiber blanket with density of 160kg/m 3 The use temperature is 1200 ℃, the slag ball content is less than or equal to 10 percent, and the heat conductivity coefficient is 0.16W/m.K (the hot surface temperature is 800 ℃).
The thickness of the nano micropore heat insulation board layer 4 is 8mm; the nanometer microporous thermal insulation board adopts WDS microporous thermal insulation board produced by Morgan thermal ceramics Co., ltd, and has density of 0.36g/cm 3 The heat conductivity coefficient is 0.044W/m.K (the temperature of a hot surface is 800 ℃), the normal-temperature compressive strength is 0.5MPa, and the shrinkage rate is 0.3% (1000 ℃ C. Multiplied by 24 h).
In the process of preparing the calcium hexaaluminate refractory prefabricated part layer 1, the height of the set expansion joint is 4mm.
The thickness of the insulating layer compacting and fixing mold 7 is 2mm.
Example 3
The specific parameters of the dimensions and materials of the components in this embodiment are as follows:
the outer diameter of the single water-cooled steel pipe constituting the double water-cooled steel pipe 5 is 194mm and the height is 2150mm.
The bottom elliptical ring-shaped prefabricated part 1.1 and the upper elliptical ring-shaped prefabricated part 1.2 which form the calcium hexaaluminate refractory prefabricated part layer 1 are 300mm in height and 80mm in thickness. The semicircular diameters of the cross sections of the tenons and the mortise are respectively 20 mm and 25mm.
The calcium hexaluminate refractory prefabricated part comprises the following chemical components in percentage by mass: al (Al) 2 O 3 ：91.6％，CaO：7.2％，SiO 2 ：0.45％，Fe 2 O 3 :0.52%, the balance being unavoidable impurities; hexaaluminum alloyThe main performance indexes of the calcium carbonate refractory prefabricated part are as follows: the normal temperature compressive strength (1300 ℃ C. Multiplied by 3 h) is 83.7MPa, the heat conductivity coefficient is 0.54W/m.K (the hot surface temperature is 800 ℃), and the density is 2.49g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The main crystal phase in the calcium hexaaluminate refractory material prefabricated part is CaAl 12 O 19 80.5wt%.
The high-temperature refractory mortar is TJM air hardening refractory mortar produced by Morgan thermal ceramics Co., ltd, and the highest use temperature (under oxidizing atmosphere) is more than or equal to 1500 ℃.
The thermal expansion fastening compensation layer 2 has a thickness of 5mm. The thickness of the thermal expansion coating is 0.8mm, and the components and mass percentage contents thereof are as follows: 25% of self-crosslinking acrylic emulsion, 20% of ammonium polyphosphate (the polymerization degree is more than or equal to 1000), 5% of dipentaerythritol, 10% of melamine, 15% of calcium hexaaluminate ultrafine powder (the granularity is less than or equal to 10 mu m) and 25% of deionized water.
The thickness of the refractory fiber blanket layer 3 is 30mm, and the refractory fiber blanket layer is formed by wrapping, compacting and splicing refractory fiber blankets with the thickness of 35 mm. The refractory fiber blanket is a zirconium-containing aluminum silicate fiber blanket with the density of 160kg/m 3 The use temperature is 1350 ℃, the slag ball content is less than or equal to 10 percent, and the heat conductivity coefficient is 0.16W/m.K (the hot surface temperature is 800 ℃).
The thickness of the nano microporous heat insulation plate layer 4 is 10mm. The nano microporous thermal insulation board adopts a novel high-strength nano microporous thermal insulation board produced by Zhengzhou longitude and latitude composite material Co-efficient, and has the density of 0.45g/cm 3 The heat conductivity coefficient is 0.042W/m.K (the temperature of a hot surface is 800 ℃), the normal-temperature compressive strength is 1.3MPa, and the shrinkage rate is 0.4% (1000 ℃ C. Multiplied by 24 h).
In the process of preparing the calcium hexaaluminate refractory prefabricated part layer 1, the height of the set expansion joint is 5mm.
The thickness of the insulating layer compacting and fixing mold 7 is 1.5mm.
Other non-illustrated parts are known in the art.
Claims (10)
1. A heating furnace double-water-pipe column heat insulation structure for high-temperature oriented silicon steel comprises a heating furnace column (8) connected between a heating furnace bottom (6) and a beam heat insulation lining (9), wherein the heating furnace column (8) comprises double water-cooled steel pipes (5), and the double water-cooled steel pipes (5) are formed by two water-cooled steel pipe groups connected by adopting flat steelThe method is characterized in that: the outer side of the double water-cooling steel pipe (5) is sequentially coated with a nano micropore heat insulation plate layer (4), a refractory fiber blanket layer (3), a thermal expansion fastening compensation layer (2) and a calcium hexaaluminate refractory material prefabricated part layer (1) from inside to outside; the calcium hexaaluminate refractory material prefabricated part layer (1) comprises the following main chemical components in percentage by mass: al (Al) 2 O 3 88-92％，CaO 7-11％，SiO 2 <1.5％，Fe 2 O 3 <1.0%, the balance being unavoidable impurities; the performance indexes of the calcium hexaaluminate refractory material prefabricated part layer (1) are as follows: the density is 1.9-2.5g/cm 3 The normal temperature compressive strength (1300 ℃ multiplied by 3 h) is more than or equal to 35MPa, and the heat conductivity coefficient is less than or equal to 0.55W/m.K (the hot surface temperature is 800 ℃); the main crystal phase in the calcium hexaaluminate refractory material prefabricated part layer (1) is CaAl 12 O 19 The content is more than or equal to 80 weight percent.
2. The dual water pipe column heat insulation structure of heating furnace for high temperature oriented silicon steel according to claim 1, wherein: the calcium hexaluminate refractory material prefabricated part layer (1) is formed by splicing and piling a group of bottom elliptical annular prefabricated parts (1.1) and a plurality of groups of upper elliptical annular prefabricated parts (1.2) in sequence.
3. The double-water pipe column heat insulation structure of a heating furnace for high-temperature oriented silicon steel according to claim 2, wherein: the bottom elliptical ring-shaped prefabricated part (1.1) is formed by mutually combining and mortise-tenon jointing two first prefabricated parts (1.11) and two second prefabricated parts (1.12);
the first prefabricated member (1.11) is of a semi-annular structure, the bottom of the first prefabricated member is a plane and is in contact with the bottom (6) of the heating furnace, a first arc tenon (1.11 a) is arranged in the middle of the top of the first prefabricated member, and a first strip tenon (1.11 b) and a first strip mortise (1.11 c) are respectively arranged in the middle of two ends of the first prefabricated member;
One side of the second prefabricated part (1.12) is a plane, the other side of the second prefabricated part protrudes to be matched with a concave surface in the middle of the double water-cooled steel pipe (5), the bottom of the second prefabricated part is a plane and is in contact with the bottom (6) of the heating furnace, a first tenon (1.12 a) is arranged in the middle of the top of the second prefabricated part, and a second strip tenon (1.12 c) and a second strip mortise (1.12 b) are respectively arranged in the middle of two ends of the second prefabricated part;
the bottom elliptical annular prefabricated part (1.1) can be formed by sequentially mortise and tenon splicing one piece of the first prefabricated part (1.11), one piece of the second prefabricated part (1.12), the other piece of the first prefabricated part (1.11) and the other piece of the second prefabricated part (1.12).
4. A furnace double water pipe column heat insulation structure for high temperature oriented silicon steel according to claim 2 or 3, characterized in that: the upper elliptical ring-shaped prefabricated part (1.2) is formed by mutually combining and mortise-tenon jointing two third prefabricated parts (1.21) and two fourth prefabricated parts (1.22);
the third prefabricated member (1.21) is of a semi-annular structure, an arc mortise (1.21 a) is formed in the middle of the bottom of the third prefabricated member, a second arc tenon (1.21 b) is formed in the middle of the top of the third prefabricated member, and a third strip tenon (1.21 c) and a third strip mortise (1.21 d) are respectively formed in the middle of the two ends of the third prefabricated member;
One side of the fourth prefabricated member (1.22) is a plane, the other side of the fourth prefabricated member protrudes out to be matched with a concave surface in the middle of the double water-cooled steel pipe (5), a first mortise (1.22 a) is formed in the middle of the bottom of the fourth prefabricated member, a second tenon (1.22 b) is formed in the middle of the top of the fourth prefabricated member, and a fourth strip tenon (1.22 d) and a fourth strip mortise (1.22 c) are respectively formed in the middle of two ends of the fourth prefabricated member;
the upper elliptical annular prefabricated part (1.2) can be formed by sequentially mortise and tenon splicing one piece of the third prefabricated part (1.21), one piece of the fourth prefabricated part (1.22), the other piece of the third prefabricated part (1.21) and the other piece of the fourth prefabricated part (1.22).
5. The heat insulation structure for a double-water pipe column of a heating furnace for high-temperature oriented silicon steel according to claim 4, wherein: the bottom elliptical ring-shaped prefabricated part (1.1) is spliced with the upper and lower mortise and tenon of the adjacent upper elliptical ring-shaped prefabricated part (1.2) through the first arc tenon (1.11 a) and the first tenon (1.12 a) of the bottom elliptical ring-shaped prefabricated part and the arc mortise (1.21 a) and the first mortise (1.22 a) of the adjacent upper elliptical ring-shaped prefabricated part (1.2) respectively; the upper elliptical ring-shaped prefabricated member (1.2) is spliced with the upper elliptical ring-shaped prefabricated member (1.2) adjacent to the upper elliptical ring-shaped prefabricated member (1.2) through a second arc tenon (1.21 b) and a second tenon (1.22 b) of the arc mortise (1.21 a) and the first mortise (1.22 a) at the bottom of the upper elliptical ring-shaped prefabricated member and the upper elliptical ring-shaped prefabricated member (1.2) adjacent to the upper elliptical ring-shaped prefabricated member respectively.
6. The dual water pipe column heat insulation structure of heating furnace for high temperature oriented silicon steel according to claim 1, wherein: the thermal expansion fastening compensation layer (2) is formed by thermal expansion coating self-heating expansion growth; the thermal expansion coating is coated on the inner side of the calcium hexaaluminate refractory material prefabricated part layer (1), and comprises the following components in percentage by mass: 25-40% of self-crosslinking acrylic emulsion, 10-20% of ammonium polyphosphate (the polymerization degree is more than or equal to 1000), 2-5% of dipentaerythritol, 5-10% of melamine, 15-30% of calcium hexaluminate ultrafine powder (the granularity is less than or equal to 10 mu m) and 15-25% of deionized water.
7. The dual water pipe column heat insulation structure of heating furnace for high temperature oriented silicon steel according to claim 1, wherein: the fire-resistant fiber blanket layer (3) is formed by wrapping and splicing single-layer fire-resistant fiber blankets, and Z-shaped right-angle steps are arranged at splicing positions of two ends.
8. The dual water pipe column heat insulation structure of heating furnace for high temperature oriented silicon steel according to claim 1, wherein: the nano microporous heat insulation plate layer (4) is formed by splicing two continuous double semi-annular columnar nano microporous heat insulation plates, and Z-shaped right-angle steps are arranged at the splicing positions of the two ends.
9. A method for preparing the double-water pipe column heat insulation structure of the heating furnace for high-temperature oriented silicon steel, which is characterized in that: after wrapping the nano micropore heat insulation plate layer (4) and the refractory fiber blanket layer (3), compacting and fixing the refractory fiber blanket layer (3) by adopting a heat preservation layer compaction and fixing die (7), then constructing a calcium hexaaluminate refractory material prefabricated part layer (1), and after the construction and the construction of each layer of calcium hexaaluminate refractory material prefabricated part layer (1) are completed, moving the heat preservation layer compaction and fixing die (7) to the upper section; the compaction fixing die (7) for the heat preservation layer is formed by hinging and combining two symmetrical die parts, the outline of the compaction fixing die is consistent with the cross section of the double water-cooling steel pipe (5), the compaction fixing die can be opened from one side, and the compaction fixing die can be locked by a button after being closed.
10. The method for preparing the double-water-pipe column heat insulation structure of the heating furnace for high-temperature oriented silicon steel according to claim 9, which is characterized in that:
the method specifically comprises the following steps:
1) Coating the inner sides of all the first prefabricated part (1.11), the second prefabricated part (1.12), the third prefabricated part (1.21) and the fourth prefabricated part (1.22) with a thermal expansion coating, wherein the thermal expansion coating forms a thermal expansion fastening compensation layer (2) when being heated during working, and drying in shade at normal temperature after coating;
2) Cleaning the surface of a double water-cooled steel pipe (5) serving as a base of a heating furnace upright post (8);
3) A layer of nano microporous heat insulation board with Z-shaped right-angle steps at the splicing positions at two ends is wrapped outside the double water-cooled steel pipe (5), and a plastic film is used for wrapping and fixing to form a nano microporous heat insulation board layer (4);
4) A layer of refractory fiber blanket with Z-shaped right-angle steps at splicing positions at two ends is wrapped around the nano micropore heat insulation plate layer (4) to form a refractory fiber blanket layer (3), a heat preservation layer compaction fixing die (7) is opened to wrap and compact the outside of the refractory fiber blanket layer (3), and a button is used for locking and fixing to control the compression amount of the refractory fiber blanket to be 10-20%;
5) The method comprises the steps that two second prefabricated members (1.12) with inner sides coated with thermal expansion coatings are arranged in a concave part in the middle of a double water-cooled steel pipe (5) wrapped with a nano micropore heat insulation plate layer (4) and a fireproof fiber blanket layer (3) and are placed at the bottom of the double water-cooled steel pipe (5), and a first prefabricated member (1.11) with inner sides coated with the thermal expansion coatings is spliced from left and right mortise and tenon to form a bottom elliptical annular prefabricated member (1.1), is contacted with a heating furnace bottom (6), a heat preservation layer solid fixed die (7) is pulled upwards, and the heat preservation layer solid fixed die is moved to the outer wall of the next fireproof fiber blanket layer (3);
6) Placing two fourth prefabricated members (1.22) with inner sides coated with thermal expansion coatings in a concave part in the middle of a double water-cooling steel pipe (5) wrapped with a nano micropore heat insulation plate layer (4) and a fireproof fiber blanket layer (3) and on a bottom elliptical annular prefabricated member (1.1), splicing one third prefabricated member (1.21) with inner sides coated with thermal expansion coatings from each mortise and tenon on the left side and the right side to form an upper elliptical annular prefabricated member (1.2), splicing the upper elliptical annular prefabricated member (1.2) with each mortise and tenon on the lower elliptical annular prefabricated member (1.1), and upwards extracting a heat insulation layer solid fixed die (7) and moving the heat insulation layer solid fixed die to the outer wall of the next fireproof fiber blanket layer (3);
7) Then, placing two fourth prefabricated members (1.22) with inner sides coated with thermal expansion coatings in a concave part in the middle of a double water-cooling steel pipe (5) wrapped with a nano micropore heat insulation plate layer (4) and a refractory fiber blanket layer (3) and on an upper elliptical annular prefabricated member (1.2) in front, splicing a third prefabricated member (1.21) with inner sides coated with thermal expansion coatings from left and right mortise and tenon respectively to form another upper elliptical annular prefabricated member (1.2), splicing upper and lower mortise and tenon of the upper elliptical annular prefabricated member (1.2) on the upper elliptical annular prefabricated member (1.2) in front, and upwards drawing out a heat insulation laminated solid fixed die (7) and moving the heat insulation laminated solid fixed die to the outer wall of the next refractory fiber blanket layer (3);
8) Repeating the step 7), continuously installing an upper elliptical ring prefabricated member (1.2) upwards, continuously repeating the step 7 after laying the upper elliptical ring prefabricated member to the position of about half of the height of the double water-cooled steel pipe (5) and setting an expansion joint of 3-5mm, laying the upper elliptical ring prefabricated member to the top of the double water-cooled steel pipe (5), and extracting a heat preservation compacting and fixing die (7), thereby completing the manufacture of the heating furnace upright post (8);
9) After maintenance for 12 hours, the construction of a beam heat insulation lining (9) connected with the top of a heating furnace upright post (8) is completed according to a refractory fiber blanket and self-flow castable double heat insulation lining manufacturing method, and finally, the whole water beam and upright post heat insulation structure of the heating furnace is formed;
and the contact surfaces of mortise and tenon splicing and piling are bonded and sealed by high-temperature refractory mortar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311605881.5A CN117606244A (en) | 2023-11-27 | 2023-11-27 | Double-water pipe column heat insulation structure of heating furnace for high-temperature oriented silicon steel and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311605881.5A CN117606244A (en) | 2023-11-27 | 2023-11-27 | Double-water pipe column heat insulation structure of heating furnace for high-temperature oriented silicon steel and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117606244A true CN117606244A (en) | 2024-02-27 |
Family
ID=89951088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311605881.5A Pending CN117606244A (en) | 2023-11-27 | 2023-11-27 | Double-water pipe column heat insulation structure of heating furnace for high-temperature oriented silicon steel and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117606244A (en) |
-
2023
- 2023-11-27 CN CN202311605881.5A patent/CN117606244A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110822895B (en) | Fixed molten pool smelting furnace manufacturing process | |
| US20130255320A1 (en) | Monolithic float glass forming chamber and method of construction | |
| WO2013179409A1 (en) | Crown structure | |
| CN104197717B (en) | A kind of aluminum alloy smelting furnace construction method with high nitrogen composite ceramics inner liner | |
| CN103557695B (en) | Furnace building method for rotary kiln tube body inner liner | |
| CN117606244A (en) | Double-water pipe column heat insulation structure of heating furnace for high-temperature oriented silicon steel and preparation method thereof | |
| CN117760221A (en) | Single water pipe column heat insulation structure of heating furnace for high-temperature oriented silicon steel and preparation method thereof | |
| CN217358057U (en) | Precast brick and masonry structure for cement kiln | |
| CN207945690U (en) | A kind of high-temperature furnace smoke pipeline with brick laying structure | |
| CN117663780A (en) | Steel rolling heating furnace double-water-pipe column heat insulation structure capable of being rapidly constructed and preparation method | |
| CN114850460A (en) | Steel ladle and preparation method thereof | |
| CN114058760B (en) | Method for quickly replacing local hot air pipeline on hot air pipe of blast furnace | |
| CN114705048A (en) | Prefabricated brick for cement kiln and building method | |
| CN117537616A (en) | Steel rolling heating furnace single water pipe column heat insulation structure capable of being rapidly constructed and preparation method | |
| CN202182612U (en) | Lining structure of vertical lime pit | |
| CN107828928A (en) | A kind of hot air duct | |
| CN204461080U (en) | A kind of high-strength climbing prolongs formula double plate shell hasp furnace lining structure | |
| CN208251366U (en) | A kind of refractory heat-insulating wall body structure | |
| CN201184480Y (en) | Walking beam type furnace water-cooling pipe fiber bundling structure | |
| CN213809442U (en) | Direct-buried hot air pipeline compensation device | |
| CN214148837U (en) | Boiler wall | |
| JP7072420B2 (en) | Skid post | |
| CN109916175B (en) | Supporting beam binding method for reducing billet black marks | |
| CN208805051U (en) | Kiln chimney refractory brick | |
| CN219083745U (en) | Fireproof prefabricated brick |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |