CN203804207U - Energy-saving steel ladle lining - Google Patents
Energy-saving steel ladle lining Download PDFInfo
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- CN203804207U CN203804207U CN201420222893.XU CN201420222893U CN203804207U CN 203804207 U CN203804207 U CN 203804207U CN 201420222893 U CN201420222893 U CN 201420222893U CN 203804207 U CN203804207 U CN 203804207U
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- 229910000831 Steel Inorganic materials 0.000 title abstract description 21
- 239000010959 steel Substances 0.000 title abstract description 21
- 239000002893 slag Substances 0.000 claims abstract description 32
- 238000000576 coating method Methods 0.000 claims description 39
- 238000005266 casting Methods 0.000 abstract description 19
- 238000009413 insulation Methods 0.000 abstract description 19
- 239000000463 material Substances 0.000 abstract description 11
- 238000009749 continuous casting Methods 0.000 abstract description 10
- 239000010410 layer Substances 0.000 abstract 9
- 239000011247 coating layer Substances 0.000 abstract 4
- 239000011449 brick Substances 0.000 description 34
- 238000000034 method Methods 0.000 description 25
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 24
- 229910052799 carbon Inorganic materials 0.000 description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 13
- 239000000395 magnesium oxide Substances 0.000 description 12
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 9
- 238000005245 sintering Methods 0.000 description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 229910001051 Magnalium Inorganic materials 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 7
- 238000010276 construction Methods 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 239000002390 adhesive tape Substances 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 6
- 238000001035 drying Methods 0.000 description 6
- 239000000428 dust Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 238000002310 reflectometry Methods 0.000 description 6
- 239000011819 refractory material Substances 0.000 description 6
- 239000007921 spray Substances 0.000 description 6
- 238000013517 stratification Methods 0.000 description 6
- 229910052725 zinc Inorganic materials 0.000 description 6
- 239000011701 zinc Substances 0.000 description 6
- 239000004411 aluminium Substances 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 5
- 230000006641 stabilisation Effects 0.000 description 5
- 238000011105 stabilization Methods 0.000 description 5
- 238000004134 energy conservation Methods 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000002905 metal composite material Substances 0.000 description 3
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000001095 magnesium carbonate Substances 0.000 description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052863 mullite Inorganic materials 0.000 description 2
- 230000032683 aging Effects 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
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- UAMZXLIURMNTHD-UHFFFAOYSA-N dialuminum;magnesium;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[Mg+2].[Al+3].[Al+3] UAMZXLIURMNTHD-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- -1 magnesium aluminate Chemical class 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The utility model relates to energy-saving steel ladle lining comprising a permanent layer and a working layer. The working layer is composed of a slag line working layer and a molten pool working layer; the permanent layer is composed of an energy-saving coating layer, nano insulation boards and a high-strength lightweight micron casting material; the energy-saving coating layer coats the inner surface of a steel ladle shell, the nano insulation boards are adhered to the energy-saving coating layer, and the high-strength lightweight micron casting material is located between the nano insulation boards and the working layer; the energy-saving coating layer is 0.1-5mm in thickness, the nano insulation board is 5-40mm in thickness, and a gap 5-20mm is reserved when each nano insulation board is adhered; the slag line working layer is 200-230mm in thickness, and the molten pool working layer is 160-200mm in thickness. By the arrangement, steel billet quality is remarkably improved, cost is lowered, and the energy-saving steel ladle lining is energy saving and environment friendly; during continuous casting, temperature fluctuation of the middle of a steel ladle is controlled within 10 DEG C, and conditions for continuous casting of special steel are created.
Description
Technical field
The utility model belongs to metallurgical furnace energy-saving field, specifically refers to a kind of energy-saving ladle liner and building method thereof.
Background technology
When in continuous casting casting cycle, molten steel temperature is too high, the easy secondary oxidation of molten steel, field trash increases, simultaneously in casting cycle, strand is prone to the series of problems such as bulge, bleed-out, column crystal prosperity, center segregation, shrinkage cavity be serious, the theory and practice of high efficiency continuous casting all shows, realizing low temperature casting is improve pulling rate and improve one of important means of slab quality.Thereby the continuous casting steel grades such as high-grade bearing, gear, cord, oil pipe of casting, be to improve slab quality, need to realize low overheat casting, need to solve low temperature casting temperature drop large simultaneously, middle water-coating port glues dead production accident.For realizing this goal, in continuous casting casting cycle, molten steel temperature fluctuation range is the smaller the better, require every stove to be controlled in 10 DEG C, between every stove, temperature is basically identical simultaneously, thereby the ladle using has watered to the sky bag time of just furnace tapping except reducing continuous casting, during empty bag, add a cover insulation and baking, and enough first furnaces tap the casting of supreme continuous casting the dress molten steel time with realize the heat of ladle saturated outside, the resistance to material of ladle liner is selected with building method very large on the heat-insulating property impact of ladle, wish that each layer of resistance to material of cylinder-packing has enough intensity, working lining has outside good high temperature resistant corrosion-resistant property, also need the resistance to material of cylinder-packing heat-insulation layer to there is good heat insulation and preservation effect.
For ladle liner insulation, what generally use at present is in box hat, to use the insulations such as one deck calcium silicate board with microporous or fibrofelt, then pours into a mould one deck permanent layer castable.This layer of castable is generally magnalium matter or High-Alumina.Then build working lining by laying bricks or stones.Working lining generally uses the magnesia carbon brick that thermal conductivity factor is very high.Because its carbon content is up to more than 14%, therefore its thermal conductivity factor is also up to 15w/mk.Such ladle masonry way, causes ladle shell temperature drift, and box hat temperature generally reaches more than 300 DEG C.What have has reached nearly 400 DEG C.A large amount of like this heats is distributed, and energy consumption increases and environment variation, has caused cost increase.There is in recent years a kind of nano-thermal-insulating plate.The thermal conductivity factor of this material is very low, is 20% left and right of general heat-insulating material thermal conductivity factor.Play very important effect for energy-conservation.It is applied to ladle heat insulation, can make ladle shell temperature drop to below 300 DEG C, can reach 260 ~ 300 DEG C.This materials'use nano material, has formed and closed nano-pore and heat insulation, but the reactive sintering of nanometer also causes serviceability temperature low, generally below 1100 DEG C.For the such high temperature of ladle, obviously actual working environment temperature is higher than its sintering temperature.This material easy-sintering, just causes thermal conductivity factor to increase and shrinks very large.Therefore not single heat-insulating property declines, and ladle lining structure is destroyed, has caused the hidden danger of security incident.
Granted publication number is CN 101386067B(application number 200810155621.1) Chinese patent literature a kind of " a kind of ladle liner and brick-building art thereof " by name disclosed, it has added one deck light-weight mullite brick between nano-thermal-insulating plate and permanent layer castable, makes like this environment for use temperature of nano-thermal-insulating plate be reduced in safe handling temperature.This patent does not adopt nano-energy-saving paint and the micro-nano castable of high-strength light.And receive a micron castable with high-strength light and compare, mullite brick has brickwork joint, prevents that the safety coefficient of bleed-out from having much room for improvement.This patent has adopted heavy alumina-magnesia castable as permanent layer, although these measures cause heat-insulating property to be significantly increased compared with conventional steel cylinder-packing.As under identical permanent layer thickness, box hat temperature is reduced to 260 DEG C by 300 DEG C.But this temperature is still very high, should further reduce the temperature of ladle shell, for energy-conserving and environment-protective with reduce costs and contribute.Granted publication number is CN 101774818B(application number 201010102547.4) Chinese patent literature a kind of " ladle liner aluminum/zinc composite ultralow-carbon alumina-magnesite carbon brick " its raw material by following weight percentage by name is disclosed through mixing, ageing mixture, moulding, heat treatment at 180～250 DEG C of temperature, solidify after 16～36 hours, make aluminum/zinc composite ultralow-carbon alumina-magnesite carbon brick: 40～60% magnesia particle, 5～15% magnesium aluminate spinel particle, 25～35% magnesia powder, 3～8% aluminium, zinc metal composite powder, 0～1% crystalline flake graphite, boracic antioxidant 0.5～2% mixes, additional 3～4% organic bond, aluminium, zinc metal composite powder employing aluminium powder and superfine spherical zinc powder are compound, and aluminium, zinc metal composite powder weight ratio are: aluminium powder: zinc powder=4～5.8: 1, aluminum powder particle size is less than 0.088mm, and purity is greater than 98%, zinc powder particle size is less than 0.044mm, and total zinc content is greater than 99.5%.
Summary of the invention
The utility model is that one can reduce molten steel temperature drop in ladle, realizes energy-conservation and tundish low overheat casting, ensures ladle liner structure and the building method of production direct motion.
Technical solutions of the utility model are:
A kind of energy-saving ladle liner, comprises permanent layer and working lining; Described working lining is made up of slag line working lining and molten pool working layer; Described permanent layer is received a micron castable by energy-saving coatings layer, nano-thermal-insulating plate and high-strength light and is formed, wherein, energy-saving coatings layer is coated in ladle shell inner surface, and nano-thermal-insulating plate sticks on energy-saving coatings layer, and high-strength light is received micron castable between nano-thermal-insulating plate and working lining.
A kind of energy-saving ladle liner, preferred scheme is that the thickness of described energy-saving coatings layer is 0.1-5mm.
A kind of energy-saving ladle liner, preferred scheme is that the thickness of nano-thermal-insulating plate is 5-40mm, leaves the gap of 5-20mm when stickup between every block of nano-thermal-insulating plate.
A kind of energy-saving ladle liner, preferably scheme is, and slag line working lining thickness is 200-230mm, and molten pool working layer thickness is 160-200mm.
A kind of energy-saving ladle liner, preferred scheme is that the thickness of described energy-saving coatings layer is 2-4mm (preferably 3mm).
A kind of energy-saving ladle liner, preferred scheme is that the thickness of nano-thermal-insulating plate is the preferred 30mm of 20-35mm(), when stickup, between every block of nano-thermal-insulating plate, leave the preferred 15mm of 10-18mm() gap.
A kind of energy-saving ladle liner, preferred scheme is that slag line working lining thickness is the preferred 220mm of 210-230mm().
A kind of energy-saving ladle liner, preferred scheme is that molten pool working layer thickness is the preferred 180mm of 170-190mm().
A building method for energy-saving ladle liner, step is as follows:
(1) dry slag and dust stratification in cleaning involucrum, whitewash energy-saving coatings or spray to ladle shell inner surface, and its thickness is the preferred 3mm of 0.1-5mm();
(2) by the surface that upwards successively nano-thermal-insulating plate is sticked on to energy-saving coatings below bag wall, the thickness of nano-thermal-insulating plate is 5-40mm (preferably 30mm), while pasting nano-thermal-insulating plate, first spread upon dope layer surface with low-temperature binder, then stick nano-thermal-insulating plate, between every block of nano-thermal-insulating plate, leave 5-20mm (preferably 15mm) gap;
(3) paste after nano-thermal-insulating plate, build the thick slag line working lining of 200-230mm (preferably 220mm) by laying bricks or stones with heat insulation magnesia carbon brick, build the preferred 180mm of 160-200mm(by laying bricks or stones with magnalium unburned brick) thick molten pool working layer, between working lining and nano-thermal-insulating plate, leave the preferred 100mm of 50-150mm() gap;
(4) casting and constructing is carried out to by the micro-nano castable of high-strength light in the space between working lining and nano-thermal-insulating plate;
(5) after the micro-nano castable construction of high-strength light, natural drying 24 hours;
(6) then little fire baking, dries after moisture, then big fire toast more than 8 hours, reaches the standard grade and uses front baking temperature to be not less than 1000
0c.
A building method for energy-saving ladle liner, preferably scheme is, and the described energy-saving coatings reflectivity of step (1) is greater than 90%, and thermal conductivity factor is less than 0.03w/ (mk).
A building method for energy-saving ladle liner, preferred scheme is that the described stickup nano-thermal-insulating of step (2) plate will develop, sturdy, cuts without hole.
A building method for energy-saving ladle liner, preferred scheme is that the bonding method of the described nano-thermal-insulating plate of step (2) is adhesive or sticking double faced adhesive tape.
A building method for energy-saving ladle liner, preferred scheme is that the described nano-thermal-insulating plate of step (2) is less than 0.035w/ (mk) at the thermal conductivity factor of 800 DEG C.
A kind of building method of energy-saving ladle liner, preferred scheme is, the performance of the micro-nano castable of the described high-strength light of step (4) is that 1000 DEG C of thermal conductivity factors are less than 0.6w/ (mk), the thermal conductivity factor of 350 DEG C is less than 0.25w/ (mk), refractoriness is greater than 1790 DEG C, and sintering strength is greater than 30MPa.
The utility model has the advantages that:
(1) working lining adopts heat insulation magnesia carbon brick, and its thermal conductivity factor is 5w/mk; Can make working lining back temperature have 1500 DEG C to be reduced to 1400 DEG C, like this for energy-conservation and improve the micro-nano castable of high-strength light and nano-thermal-insulating plate service life is very good;
(2) the working lining back side has adopted the micro-nano castable of high-strength light can significantly reduce below the temperature to 1050 DEG C of nano-thermal-insulating plate hot side; Make nano-thermal-insulating plate within the scope of safe working temperature, protected nano-thermal-insulating plate; Therefore can use for a long time and not lose efficacy;
(3) energy-saving coatings that box hat inner surface adopts, has further like this reduced heat radiation; Facts have proved and can make temperature reduce by 15% left and right;
(4) adopt this composite construction to build cylinder-packing by laying bricks or stones, heat-insulating property is very good; Even in ladle dilatation situation, also can make steel clad temperature reduce more than 100 DEG C; Having caused Energy Intensity Reduction 6kwh/ ton steel and tundish to water the steel degree of superheat reduces;
Therefore, significantly improve billet quality, reduced cost and energy-conserving and environment-protective; In continuous casting casting cycle, the fluctuation of tundish molten steel temperature is controlled in 10 DEG C, for condition has been created in the continuous casting casting of special steel; Can reduce like this inside steel billet quality waste product, seem more important at the steel industry in low margin age, the importance that seem energy-conservation today that particularly environmental protection is taken seriously day by day.
Brief description of the drawings
Fig. 1 is the structural representation of the energy-saving ladle liner of the utility model.
In figure: 1 is ladle shell, 2 is energy-saving coatings layer, and 3 is nano-thermal-insulating plate, and 4 is the micro-nano castable of high-strength light, and 5 is working lining.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described further.
embodiment 1as shown in Figure 1, a kind of energy-saving ladle liner, comprises permanent layer and working lining; Described working lining is made up of slag line working lining and molten pool working layer; Described permanent layer is received a micron castable by energy-saving coatings layer, nano-thermal-insulating plate and high-strength light and is formed, wherein, energy-saving coatings layer is coated in ladle shell inner surface, and nano-thermal-insulating plate sticks on energy-saving coatings layer, and high-strength light is received micron castable between nano-thermal-insulating plate and working lining.The thickness of described energy-saving coatings layer is 0.1mm.The thickness of nano-thermal-insulating plate is 5mm, leaves the gap of 5mm when stickup between every block of nano-thermal-insulating plate.Slag line working lining thickness is 200mm, and molten pool working layer thickness is 160mm.
The building method of aforementioned energy-saving ladle liner, step is as follows:
(1) dry slag and dust stratification in cleaning involucrum, whitewash energy-saving coatings or spray to ladle shell inner surface, and its thickness is 0.1mm, and energy-saving coatings reflectivity is greater than 90%, and thermal conductivity factor is less than 0.03w/ (mk).
(2) by the surface that upwards successively nano-thermal-insulating plate is sticked on to energy-saving coatings below bag wall, the thickness of nano-thermal-insulating plate is 5mm, while pasting nano-thermal-insulating plate, first spread upon dope layer surface with low-temperature binder, then stick nano-thermal-insulating plate, between every block of nano-thermal-insulating plate, leave 5mm gap, the bonding method of nano-thermal-insulating plate is adhesive or sticking double faced adhesive tape, pasting nano-thermal-insulating plate will develop, sturdy, cut without hole, nano-thermal-insulating plate is less than 0.035w/ (mk) at the thermal conductivity factor of 800 DEG C;
(3) paste after nano-thermal-insulating plate, build with heat insulation magnesia carbon brick the slag line working lining that 200mm is thick by laying bricks or stones, build the thick molten pool working layer of 160mm by laying bricks or stones with magnalium unburned brick, between working lining and nano-thermal-insulating plate, leave the gap of 50mm;
(4) casting and constructing is carried out to by the micro-nano castable of high-strength light in the space between working lining and nano-thermal-insulating plate, the performance of the micro-nano castable of high-strength light is that 1000 DEG C of thermal conductivity factors are less than 0.6w/ (mk), the thermal conductivity factor of 350 DEG C is less than 0.25w/ (mk), refractoriness is greater than 1790 DEG C, and sintering strength is greater than 30MPa;
(5) after the micro-nano castable construction of high-strength light, natural drying 24 hours;
(6) then little fire baking, dries after moisture, then big fire toast more than 8 hours, reaches the standard grade and uses front baking temperature to be not less than 1000
0c.
Adopt high-strength light to receive the performance indications of the refractory material that micron castable and working lining adopt in table 1 and table 2.
Table 1 high-strength light is received a micron castable physical and chemical index
Table 2 working lining refractory material
| Name of product | Magnesia-alumina-carbon brick | Magnesia carbon brick |
| Application region | Molten bath | Slag line |
| MgO/% | ≥60 | ≥80 |
| F.C/% | 10~12 | ≥13 |
| Al 2O 3/% | ≥20 | / |
| Compressive resistance/MPa | ≥40 | ≥35 |
| Bulk density/g.cm -3 | 3.00 | 3.00 |
| Apparent porosity/% | ≤17 | ≤4 |
| Thermal conductivity factor/w (mk) -1(1000℃) | 12 | 5.0 |
On 85 tons of ladles, construct according to method described in embodiment 1, ladle puts into operation, and box hat temperature stabilization temperature is 200 DEG C (slag line working linings), 220 DEG C (bag wall), and box hat temperature is 350 DEG C than before, has reduced more than 130 DEG C.Tapping temperature has reduced by 15 DEG C, has reduced very significantly cost and energy consumption.
embodiment 2a kind of energy-saving ladle liner, basic structure still can be with reference to accompanying drawing 1, but is that the thickness of described energy-saving coatings layer is 5mm with embodiment 1 difference.The thickness of nano-thermal-insulating plate is 40mm, leaves the gap of 20mm when stickup between every block of nano-thermal-insulating plate.Slag line working lining thickness is 230mm, and molten pool working layer thickness is 200mm.
It is identical with embodiment 1 that high-strength light is received the refractory material that micron castable and working lining adopt.
The building method of aforementioned energy-saving ladle liner, step is as follows
(1) dry slag and dust stratification in cleaning involucrum, whitewash energy-saving coatings or spray to ladle shell inner surface, and its thickness is 5mm, and energy-saving coatings reflectivity is greater than 90%, and thermal conductivity factor is less than 0.03w/ (mk);
(2) by the surface that upwards successively nano-thermal-insulating plate is sticked on to energy-saving coatings below bag wall, the thickness of nano-thermal-insulating plate is 40mm, while pasting nano-thermal-insulating plate, first spread upon dope layer surface with low-temperature binder, then stick nano-thermal-insulating plate, between every block of nano-thermal-insulating plate, leave 20mm gap, the bonding method of nano-thermal-insulating plate is adhesive or sticking double faced adhesive tape, pasting nano-thermal-insulating plate will develop, sturdy, cut without hole, nano-thermal-insulating plate is less than 0.035w/ (mk) at the thermal conductivity factor of 800 DEG C;
(3) paste after nano-thermal-insulating plate, build with heat insulation magnesia carbon brick the slag line working lining that 230mm is thick by laying bricks or stones, build the thick molten pool working layer of 200mm by laying bricks or stones with magnalium unburned brick, between working lining and nano-thermal-insulating plate, leave the gap of 150mm;
(4) casting and constructing is carried out to by the micro-nano castable of high-strength light in the space between working lining and nano-thermal-insulating plate, the performance of the micro-nano castable of high-strength light is that 1000 DEG C of thermal conductivity factors are less than 0.6w/ (mk), the thermal conductivity factor of 350 DEG C is less than 0.25w/ (mk), refractoriness is greater than 1790 DEG C, and sintering strength is greater than 30MPa;
(5) after the micro-nano castable construction of high-strength light, natural drying 24 hours;
(6) then little fire baking, dries after moisture, then big fire toast more than 8 hours, reaches the standard grade and uses front baking temperature to be not less than 1000
0c.
After implementing like this, on 120 tons of ladles, construct according to method described in embodiment 2, ladle puts into operation, box hat temperature stabilization temperature is 198 DEG C (slag line working linings), 196 DEG C (bag wall), 200 DEG C (at the bottom of bag), box hat temperature is 300 DEG C than before, has on average declined 100 DEG C.This produces material impact to reducing costs with energy consumption and environmental protection.
embodiment 3a kind of energy-saving ladle liner, basic structure still can be with reference to accompanying drawing 1, but is that the thickness of described energy-saving coatings layer is 2mm with embodiment 1 difference.The thickness of nano-thermal-insulating plate is 20mm, leaves the gap of 10mm when stickup between every block of nano-thermal-insulating plate.Slag line working lining thickness is 210mm, and molten pool working layer thickness is 170mm.
It is identical with embodiment 1 that high-strength light is received the refractory material that micron castable and working lining adopt.
The building method of aforementioned energy-saving ladle liner, step is as follows:
(1) dry slag and dust stratification in cleaning involucrum, whitewash energy-saving coatings or spray to ladle shell inner surface, and its thickness is 2mm, and described energy-saving coatings reflectivity is greater than 90%, and thermal conductivity factor is less than 0.03w/ (mk);
(2) by the surface that upwards successively nano-thermal-insulating plate is sticked on to energy-saving coatings below bag wall, the thickness of nano-thermal-insulating plate is 20mm, while pasting nano-thermal-insulating plate, first spread upon dope layer surface with low-temperature binder, then stick nano-thermal-insulating plate, between every block of nano-thermal-insulating plate, leave 10mm gap, the bonding method of nano-thermal-insulating plate is adhesive or sticking double faced adhesive tape, pasting nano-thermal-insulating plate will develop, sturdy, cut without hole, nano-thermal-insulating plate is less than 0.035w/ (mk) at the thermal conductivity factor of 800 DEG C;
(3) paste after nano-thermal-insulating plate, build with heat insulation magnesia carbon brick the slag line working lining that 210mm is thick by laying bricks or stones, build the thick molten pool working layer of 170mm by laying bricks or stones with magnalium unburned brick, between working lining and nano-thermal-insulating plate, leave the gap of 80mm;
(4) casting and constructing is carried out to by the micro-nano castable of high-strength light in the space between working lining and nano-thermal-insulating plate, the performance of the micro-nano castable of high-strength light is that 1000 DEG C of thermal conductivity factors are less than 0.6w/ (mk), the thermal conductivity factor of 350 DEG C is less than 0.25w/ (mk), refractoriness is greater than 1790 DEG C, and sintering strength is greater than 30MPa;
(5) after the micro-nano castable construction of high-strength light, natural drying 24 hours;
(6) then little fire baking, dries after moisture, then big fire toast more than 8 hours, reaches the standard grade and uses front baking temperature to be not less than 1000
0c.
After implementing like this, on 90 tons of ladles, construct according to method described in embodiment 3, ladle puts into operation, box hat temperature stabilization temperature is 180 DEG C (slag line working linings), 178 DEG C (bag wall), 182 DEG C (at the bottom of bag), box hat temperature is 295 DEG C than before, has on average declined 110 DEG C.Significantly reduce cost, saved the energy.
embodiment 4a kind of energy-saving ladle liner, basic structure still can be with reference to accompanying drawing 1, but is that the thickness of described energy-saving coatings layer is 4mm with embodiment 1 difference.The thickness of nano-thermal-insulating plate is 35mm, leaves the gap of 18mm when stickup between every block of nano-thermal-insulating plate.Slag line working lining thickness is 230mm, and molten pool working layer thickness is 190mm.
It is identical with embodiment 1 that high-strength light is received the refractory material that micron castable and working lining adopt.
The building method of aforementioned energy-saving ladle liner, step is as follows:
(1) dry slag and dust stratification in cleaning involucrum, whitewash energy-saving coatings or spray to ladle shell inner surface, and its thickness is 4mm, and described energy-saving coatings reflectivity is greater than 90%, and thermal conductivity factor is less than 0.03w/ (mk);
(2) by the surface that upwards successively nano-thermal-insulating plate is sticked on to energy-saving coatings below bag wall, the thickness of nano-thermal-insulating plate is 35mm, while pasting nano-thermal-insulating plate, first spread upon dope layer surface with low-temperature binder, then stick nano-thermal-insulating plate, between every block of nano-thermal-insulating plate, leave 18mm gap, the bonding method of nano-thermal-insulating plate is adhesive or sticking double faced adhesive tape, pasting nano-thermal-insulating plate will develop, sturdy, cut without hole, nano-thermal-insulating plate is less than 0.035w/ (mk) at the thermal conductivity factor of 800 DEG C;
(3) paste after nano-thermal-insulating plate, build with heat insulation magnesia carbon brick the slag line working lining that 230mm is thick by laying bricks or stones, build the thick molten pool working layer of 190mm by laying bricks or stones with magnalium unburned brick, between working lining and nano-thermal-insulating plate, leave the gap of 120mm;
(4) casting and constructing is carried out to by the micro-nano castable of high-strength light in the space between working lining and nano-thermal-insulating plate, the performance of the micro-nano castable of high-strength light is that 1000 DEG C of thermal conductivity factors are less than 0.6w/ (mk), the thermal conductivity factor of 350 DEG C is less than 0.25w/ (mk), refractoriness is greater than 1790 DEG C, and sintering strength is greater than 30MPa;
(5) after the micro-nano castable construction of high-strength light, natural drying 24 hours;
(6) then little fire baking, dries after moisture, then big fire toast more than 8 hours, reaches the standard grade and uses front baking temperature to be not less than 1000
0c.
After implementing like this, on 110 tons of ladles, construct according to method described in embodiment 4, ladle puts into operation, box hat temperature stabilization temperature is 175 DEG C (slag line working linings), 172 DEG C (bag wall), 180 DEG C (at the bottom of bag), box hat temperature is 281 DEG C than before, has on average declined 100 DEG C.This has produced material impact to energy-conserving and environment-protective.
embodiment 5a kind of energy-saving ladle liner, basic structure still can be with reference to accompanying drawing 1, but is that the thickness of described energy-saving coatings layer is 3mm with embodiment 1 difference.The thickness of nano-thermal-insulating plate is 30mm, leaves the gap of 15mm when stickup between every block of nano-thermal-insulating plate.Slag line working lining thickness is 220mm, and molten pool working layer thickness is 180mm.
It is identical with embodiment 1 that high-strength light is received the refractory material that micron castable and working lining adopt.
The building method of aforementioned energy-saving ladle liner, step is as follows:
(1) dry slag and dust stratification in cleaning involucrum, whitewash energy-saving coatings or spray to ladle shell inner surface, and its thickness is 3mm, and described energy-saving coatings reflectivity is greater than 90%, and thermal conductivity factor is less than 0.03w/ (mk);
(2) by the surface that upwards successively nano-thermal-insulating plate is sticked on to energy-saving coatings below bag wall, the thickness of nano-thermal-insulating plate is 30mm, while pasting nano-thermal-insulating plate, first spread upon dope layer surface with low-temperature binder, then stick nano-thermal-insulating plate, between every block of nano-thermal-insulating plate, leave 15mm gap, the bonding method of nano-thermal-insulating plate is adhesive or sticking double faced adhesive tape, pasting nano-thermal-insulating plate will develop, sturdy, cut without hole, nano-thermal-insulating plate is less than 0.035w/ (mk) at the thermal conductivity factor of 800 DEG C;
(3) paste after nano-thermal-insulating plate, build with heat insulation magnesia carbon brick the slag line working lining that 220mm is thick by laying bricks or stones, build the thick molten pool working layer of 180mm by laying bricks or stones with magnalium unburned brick, between working lining and nano-thermal-insulating plate, leave the gap of 100mm;
(4) casting and constructing is carried out to by the micro-nano castable of high-strength light in the space between working lining and nano-thermal-insulating plate, the performance of the micro-nano castable of high-strength light is that 1000 DEG C of thermal conductivity factors are less than 0.6w/ (mk), the thermal conductivity factor of 350 DEG C is less than 0.25w/ (mk), refractoriness is greater than 1790 DEG C, and sintering strength is greater than 30MPa;
(5) after the micro-nano castable construction of high-strength light, natural drying 24 hours;
(6) then little fire baking, dries after moisture, then big fire toast more than 8 hours, reaches the standard grade and uses front baking temperature to be not less than 1000
0c.
After implementing like this, on 100 tons of ladles, construct according to method described in embodiment 5, ladle puts into operation, box hat temperature stabilization temperature is 168 DEG C (slag line working linings), 165 DEG C (bag wall), 170 DEG C (at the bottom of bag), box hat temperature is 286 DEG C than before, has on average declined 120 DEG C.This produces material impact to reducing costs with energy consumption and environmental protection.
The utility model is successful Application on ladle, can be generalized on the metallurgical furnace of the whole metallurgy industries such as electric furnace, converter, tundish, heating furnace, and can be generalized to too on the thermal kiln furnaces such as glass furnace, cement kiln, limekiln, can significantly reduce energy consumption.Significant to energy-conserving and environment-protective and the raising performance of enterprises.Therefore application prospect is boundless.
It should be noted that, embodiment is the detailed description of the invention of the utility model optimum, be not limited to the utility model, although the utility model is had been described in detail with reference to previous embodiment, for a person skilled in the art, its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement.All within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (9)
1. an energy-saving ladle liner, is characterized in that, comprises permanent layer and working lining; Described working lining is made up of slag line working lining and molten pool working layer; Described permanent layer is received a micron castable by energy-saving coatings layer, nano-thermal-insulating plate and high-strength light and is formed, wherein, energy-saving coatings layer is coated in ladle shell inner surface, and nano-thermal-insulating plate sticks on energy-saving coatings layer, and high-strength light is received micron castable between nano-thermal-insulating plate and working lining.
2. energy-saving ladle liner according to claim 1, is characterized in that, the thickness of described energy-saving coatings layer is 0.1-5mm.
3. energy-saving ladle liner according to claim 1, is characterized in that, the thickness of nano-thermal-insulating plate is 5-40mm, leaves the gap of 5-20mm between every block of nano-thermal-insulating plate.
4. energy-saving ladle liner according to claim 3, is characterized in that, the thickness of nano-thermal-insulating plate is the gap of leaving 10-18mm between every block of nano-thermal-insulating plate of 20-35mm.
5. energy-saving ladle liner according to claim 1, is characterized in that, slag line working lining thickness is 200-230mm.
6. energy-saving ladle liner according to claim 1, is characterized in that, molten pool working layer thickness is 160-200mm.
7. energy-saving ladle liner according to claim 1, is characterized in that, the thickness of described energy-saving coatings layer is 2-4mm.
8. energy-saving ladle liner according to claim 1, is characterized in that, slag line working lining thickness is 210-230mm.
9. energy-saving ladle liner according to claim 1, is characterized in that, molten pool working layer thickness is 170-190mm.
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| CN201420222893.XU CN203804207U (en) | 2014-05-04 | 2014-05-04 | Energy-saving steel ladle lining |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103920868A (en) * | 2014-05-04 | 2014-07-16 | 山东柯信新材料有限公司 | Energy-saving type steel ladle lining and bricklaying method thereof |
| CN105880547A (en) * | 2016-06-24 | 2016-08-24 | 武汉科技大学 | Steel ladle with function of nano thermal insulation |
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2014
- 2014-05-04 CN CN201420222893.XU patent/CN203804207U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103920868A (en) * | 2014-05-04 | 2014-07-16 | 山东柯信新材料有限公司 | Energy-saving type steel ladle lining and bricklaying method thereof |
| CN103920868B (en) * | 2014-05-04 | 2016-02-17 | 山东柯信新材料有限公司 | A kind of energy-saving ladle liner and building method thereof |
| CN105880547A (en) * | 2016-06-24 | 2016-08-24 | 武汉科技大学 | Steel ladle with function of nano thermal insulation |
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