CN105170968A - Submersed nozzle - Google Patents
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- CN105170968A CN105170968A CN201510526430.1A CN201510526430A CN105170968A CN 105170968 A CN105170968 A CN 105170968A CN 201510526430 A CN201510526430 A CN 201510526430A CN 105170968 A CN105170968 A CN 105170968A
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Abstract
The invention belongs to the technical field of continuous casting functional refractory materials, and mainly relates to a submersed nozzle. The submersed nozzle comprises a bowl portion (1), a body (2), a slag line (3) and a steel-tapping hole (4) in sequence from top to bottom. The bowl portion, the body and the steel-tapping hole are made of carbon combined light porous oxide-carbonaceous materials. The carbon combined light porous oxide-carbonaceous material comprises alumina bubbles, calcium hexaluminate and graphite, and further comprises phenolic resin powder and furfural in an addition mode. A lining is arranged on the inner walls of the bowl portion, the body, the slag line and the steel-tapping hole in a composite mode. The lining comprises calcium hexaluminate and acidic materials or materials which can be converted to form the acidic materials under the atmosphere of high-temperature molten steel, and further comprises phenolic resin powder, furfural and plasticizer in an addition mode. According to the invention, the problem that the inclusion in molten steel or cold steel is prone to depositing on the inner wall of a nozzle and finally blocks the nozzle is solved.
Description
Technical field
The invention belongs to continuous casting functional technical field of refractory materials, relate generally to a kind of submersed nozzle.
Background technology
Submersed nozzle is the most key functional refractory of casting process; it is arranged between tundish and crystallizer; that molten steel is transported to the passage of crystallizer from tundish; namely molten steel will be protected secondary oxidation not to occur; prevent nitrogen from dissolving in or slag is mixed into molten steel and prevent molten steel from splashing, ensure that molten steel has a rational Flow and heat flux to distribute in crystallizer again.Usual submersed nozzle, by being generally made up of four positions, is followed successively by a bowl portion, body, slag line, tapping hole.Main composition material and the main military service performance thereof at each position are as shown in table 1:
Table 1 submersed nozzle each position composition and military service performance thereof
| Position | Material | Military service performance | Key performance |
| Bowl portion | MgO-C、MgO·Al 2O 3-C, carbon content > 10wt% | Thermal shock resistance, scour resistance | Scour resistance |
| Body | Al 2O 3-C, carbon content > 25wt% | Thermal shock resistance, scour resistance | Thermal shock resistance |
| Slag line | ZrO 2-C, more than carbon content 10wt% | Thermal shock resistance, corrosion resistance | Corrosion resistance |
| Tapping hole | Al 2O 3-C, more than carbon content 20wt% | Thermal shock resistance, scour resistance | Scour resistance |
Current, under low-carbon economy situation is greatly developed in the whole world, green refractory material strategy is the important development strategy of refractories industry sustainable development at present and in the future, for submersed nozzle, and body part material volume density 2.6g/cm
3left and right, more than carbon content 25wt%, this position accounts for mouth of a river volume more than 60%, quality more than 50%, determines submersed nozzle thermal conductivity higher, particularly in casting process, the outside of body all exposes in atmosphere, heat leakage is serious, is one of key factor affecting nozzle blocking, simultaneously submersed nozzle composition material medium high carbon content, pollute molten steel, consume carbon resource non-renewable in a large number simultaneously.
The each position of submersed nozzle is except the performance required by table 1, it is also needed to have anticlogging function, particularly produce at continuous casting in the process of carbon aluminium-killed steel, low-carbon (LC) aluminium-silicon killed steel or other low-alloy steel and often Submerged Nozzle Clogging Course occurs, can be summarized as about the mechanism blocked and principle: 1) metallurgy factor, the cleannes of casting steel grade and deoxidation situation, the harm that each process procedure produces is maximum; 2) material factor, makes material type, second-phase material (SiO that the mouth of a river is selected
2, K
2o, Fe
2o
3) and carbon; 3) hydraulic factors/mouth of a river shape and inner wall roughness, molten steel flow field and flow velocity; 4) hot factor, the preheat mode at liquid steel temperature and uniformity, ladle and tundish and the mouth of a river thereof.At present, steel plant usually introduce additive to molten steel and make the high-melting-point field trash in molten steel be transformed into lower melting point inclusion, and this can alleviate the harm of dross to a certain extent, but can cause the secondary pollution of molten steel, affects slab quality.The improvement of mouth of a river material is one of the most outstanding measure solving blockage problem for this reason, and one is the thermal conductivity factor by reducing submersed nozzle and air contact site material, improves its heat-insulating property, alleviates Al
2o
3field trash or the blocking of cold steel, current common practice pastes insulation material outside the mouth of a river, but in cast molten steel process, because mouth of a river composition material has high thermal conductivity, hull-skin temperature more than 1000 DEG C, make the easy efflorescence of insulation material or sintering, heat insulation effect is deteriorated along with the prolongation of the duration of pouring; Two is the inner-wall material character contacted with molten steel by changing submersed nozzle, avoids Al
2o
3the blocking caused, patent US5902511A is with CaZrO
3for main inner lining material, by the SiO introduced
2compound, at high temperature generate CaO-SiO
2-Al
2o
3liquid phase impels CaZrO
3decompose and improve anti-clogging effect, but CaZrO
3all need to be obtained by special treatment process, preparation process is complicated, is unfavorable for carrying out spread, simultaneously in liner scheme in order to ensure its thermal shock resistance, introduce the graphite of 5%-30%, and be unfavorable for anti-blocking.
Summary of the invention
In order to solve, current submersed nozzle each position carbon content is large compared with high, bulk density, high heat conductance, casting process heat insulation effect are poor, serious and the submersed nozzle of heat leakage is in casting process, easily there is deposition and the problem at the final blocking mouth of a river at mouth of a river inwall in molten steel inclusion or cold steel, the object of the invention is to propose a kind of submersed nozzle.
The present invention adopts following technical scheme for completing above-mentioned purpose:
A kind of submersed nozzle, described submersed nozzle is made up of four positions, and four positions are followed successively by a bowl portion, body, slag line and tapping hole from top to bottom; Described slag line adopts zirconium material with carbon element; Described bowl portion, body and tapping hole adopt carbon in conjunction with light porous oxide-carbonaceous material; Described carbon comprises aerobic aluminium hollow ball, calcium hexaluminate and graphite in conjunction with the raw material of light porous oxide-carbonaceous material; Granularity≤the 1mm of described alumina hollow ball, the granularity≤0.2mm of described calcium hexaluminate, density is 0.7g/cm
3~ 1.0g/cm
3; Described carbon is added with phenol-formaldehyde resin powder and furfural in conjunction with light porous oxide-carbonaceous material is also outer;
The inwall of described bowl portion, body, slag line and tapping hole is compounded with liner, includes calcium hexaluminate and acidic materials in the raw material of described liner or the material forming acidic materials can be transformed under high-temperature molten steel atmosphere; The density of described calcium hexaluminate is 2.8g/cm
3~ 3.1g/cm
3; Described liner is also outer is added with phenol-formaldehyde resin powder, furfural and plasticizer.
The raw material of described liner also adds metal powder.
The raw material components of described liner and mass percent are: calcium hexaluminate 40 order 10% ~ 45%, calcium hexaluminate 100 order 20% ~ 30%, calcium hexaluminate 325 order 10% ~ 40%, acidic materials or can transform under high-temperature molten steel atmosphere and form the material 5% ~ 15% of acidic materials, metal powder 2% ~ 10%.
Described acidic materials are SiO
2, B
2o
3, one or both in borax; Described SiO
2or B
2o
3or borax can make calcium hexaluminate decompose, and new low melting point liquid phase can be formed, make molten steel be mingled with Al
2o
3be mingled with and be difficult to be deposited on inwall.
Can transform the material forming acidic materials under high-temperature molten steel atmosphere is Si powder, SiC, Si
3n
4, B
4one or more of C, BN; Formation acidic materials can be transformed under high-temperature molten steel atmosphere, not only can play the effect of antioxidant, meanwhile, its oxidation product can with CaO6Al
2o
3reaction, forms some comparatively CaO6Al
2o
3the thing phase that fusing point is much lower, is conducive to preventing or alleviate nozzle clogging phenomenon.
Described acidic materials, can transform under high-temperature molten steel atmosphere that to form the material particle size of acidic materials be 100 order ~ 350 orders.
The addition of phenol-formaldehyde resin powder described in liner is 3% ~ 6% of above-mentioned liner raw material gross weight, and the addition of furfural is 90 ~ 110% of phenol-formaldehyde resin powder weight; The addition of plasticizer is 5% ~ 10% of phenol-formaldehyde resin powder weight.
Alloyed powder and low-melting-point material is also added in the raw material of described carbon in conjunction with light porous oxide-carbonaceous material.
Described carbon in conjunction with the raw material components of light porous oxide-carbonaceous material and mass percent is: alumina hollow ball 20% ~ 55%, calcium hexaluminate 30% ~ 75%
,graphite 3% ~ 6%, alloyed powder, 1% ~ 8%, low-melting-point material, 1% ~ 4%.
Carbon is that carbon is in conjunction with 8% ~ 12% of light porous oxide-carbonaceous material raw material gross weight in conjunction with the addition of phenol-formaldehyde resin powder described in light porous oxide-carbonaceous material; The addition of described furfural is 120% ~ 130% of phenol-formaldehyde resin powder weight.
Metal powder described in liner is one or both the mixing in Al powder, Mg powder; The granularity of metal powder described in liner is 100 order ~ 350 orders.
Described plasticizer is one or more in GLYDOLN2002, OPTAPIXPAF35, ZUSOPLAST126/3.
Carbon is 190 graphite, 199 graphite, 595 graphite, 599 graphite, 890 graphite, 895 graphite, carbon content >=95% in conjunction with the graphite described in light porous oxide-carbonaceous material, one or more in the ultra-fine crystalline flake graphite of particle size≤13 μm.
Carbon is the mixture of Al powder and Mg powder in conjunction with the alloyed powder described in light porous oxide-carbonaceous material, and wherein the mass ratio of Al powder and Mg powder is 0.5 ~ 2, and granularity is 100 order ~ 350 orders.
Described eutectic melting point thing is one or both in borax or boron glass powder, and described borax granularity >=0.2mm, and < 0.5mm, the fusion temperature of described boron glass powder is 700 DEG C ~ 1000 DEG C, and granularity is 200 order ~ 350 orders.
Raw material components and the mass percent of described zirconium material with carbon element are: electric-melting zirconia 40 order 20% ~ 50%; Electric-melting zirconia 100 order 5 ~ 20%; Electric-melting zirconia 325 order 20% ~ 50%; Graphite 5% ~ 15%; The addition of phenol-formaldehyde resin powder is 4% ~ 8% of above-mentioned raw materials gross weight, and the addition of furfural is 100% of phenol-formaldehyde resin powder weight.
Graphite described in zirconium material with carbon element is one or both in 199 graphite or 595 graphite.
Carry out preparing burden and batch mixing according to such scheme respectively, first by raw material, phenol-formaldehyde resin powder is placed in high speed mixing smelting machine in advance after mixing 10min, blank is obtained after furfural and plasticizer being poured into the mixing 10min of glassware high speed degree again, blank is sieved, granularity≤3mm, then blank is carried out drying at 60 degree of baking ovens, controlling the front volatility range of pressure is 2.2% ~ 2.8%, then start to carry out isostatic compaction, submersed nozzle shaping mould Job's tears is put into the gum cover with base seal plug, then the cylinder of shaping liner is nested with on mould Job's tears, and inner lining material is filled the gap of cylinder and mould Job's tears, and then in the gap of cylinder and gum cover, add bowl portion successively expect, body material, slag line material, tapping hole material, after blank jolt ramming, cylinder is proposed along mould Job's tears length direction, finally seal with plug, in isostatic pressing machine, warp≤40MPa forming under the pressure obtains submersed nozzle base substrate, and at N
2after 850 DEG C of-1000 DEG C of heat treatments, the ripe base of submersed nozzle is obtained under atmosphere.
A kind of submersed nozzle that the present invention proposes, described bowl portion, body and tapping hole adopt carbon in conjunction with light porous oxide-carbonaceous material, the light porous oxide introduced is as alumina hollow ball, lightweight calcium hexaluminate, substantially increase the heat-insulating property of submersed nozzle, select the material of different grain size and Different Pore Structures simultaneously, improve the thermal shock resistance of material, compensate for and to cause degradation problem under thermal shock resistance because carbon content is less, and introduce suitable metal powder, it after Overheating Treatment or under arms forms Ceramic bond phase in process, improve the intensity of light material, density decline is simultaneously conducive to the lifting of submersed nozzle thermal shock resistance, say from performance, after lighting, shared by carbon, the volume fraction of goods reduces greatly, has current Low carbon refractories beneficial effect, and simultaneously the thermal shock resistance at the mouth of a river and heat-insulating property are all improved, the liner at the mouth of a river adopts anti-blocking material, effectively alleviate molten steel inclusion blocking mouth of a river inwall, the calcium hexaluminate that the liner at the mouth of a river is introduced is a kind of commercial materials of Prof. Du Yucang, high-melting-point high refractoriness, mechanics is close with corundum with physical property, have under alkalescence and reduction atmosphere stable, and motlten metal is nonwetting, easily become CaO and 6Al with acidic materials action breaks
2o
3, by introducing acidic materials such as SiO in inner lining material
2or borax substance, such as SiO
2calcium hexaluminate can be made to decompose, and the CaO-SiO of part can be formed
2-Al
2o
3liquid phase, makes the Al that molten steel is mingled with
2o
3be difficult to be deposited on inwall, also can introduce appropriate Si powder, SiC, Si
3n
4, B
4one or more of C or BN, not only can play the effect of antioxidant, meanwhile, its oxidation product can with CaO6Al
2o
3reaction, forms some and compares CaO6Al
2o
3low-melting low-melting-point material, is conducive to preventing or alleviate nozzle clogging phenomenon, submersed nozzle main portions material property of the present invention is as shown in table 2.
Table 2 submersed nozzle each position performance indications
| Position | Apparent porosity/% | Bulk density/gcm -3 | Rupture strength/MPa |
| Liner | 10-13 | 2.5-2.8 | 8-12 |
| Body, bowl portion and tapping hole | 30-60 | 1.5-2.0 | 6-8 |
From angle of sustainable development, reduce the dependence to different regenerated resources, lighting aggregate is artificial preparation, technical maturity.Say economically, lightweight submersed nozzle no matter all can reduction manpower financial capacity in various degree from manufacture and transportation, and in use effectively can reduce baking time, in casting process, heat-insulating property improves, as shown in table 3 simultaneously.
Light porous oxide-the carbonaceous material of table 3 and traditional submersed nozzle body Al
2o
3-C material free carbon content and thermal conductivity contrast
| Material | Free carbon content/wt% | 800 DEG C of thermal conductivity/Wm -1·K -1 |
| Conventional bulk Al 2O 3-C material | 25-30 | 20-30 |
| Light porous oxide-carbonaceous material | 10-15 | 5-10 |
The anti-Al of inner lining material
2o
3deposition test carries out at Sinosteel Luoyang Institute of Refractories research and development centre 1000KW slag-resistant trial furnace, by adding metallic aluminium in molten steel, aluminium horizontal dimension is made to be held in about 0.05%, keep reducing atmosphere to control in stove, molten steel temperature 1550 ± 25 DEG C, φ 50mm cylinder sample is inserted in molten steel, dip time 2h, weigh its anti-deposition effect with the rate of change of width size before and after specimen test, result of the test is shown in Table 4, and can find out the anti-Al of this calcium hexaluminate material
2o
3deposition effect is obvious.
Al in the anti-molten steel of each material of table 4
2o
3the speed of deposition
| Material | Conventional aluminium material with carbon element | Calcium zirconate material with carbon element | Calcium hexaluminate material |
| Sedimentation rate/mmh -1 | 1.8 | -1.1 | ＜-0.8 |
As can be seen from the above, lightweight submersed nozzle has good economic benefit and social benefit.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure: 1, bowl portion, 2, body, 3, slag line, 4, tapping hole, 5, liner.
Detailed description of the invention
With specific embodiment, the present invention is illustrated by reference to the accompanying drawings:
Embodiment 1
As shown in Figure 1, a kind of submersed nozzle, described submersed nozzle is made up of four positions, and four positions are followed successively by bowl portion 1, body 2, slag line 3 and tapping hole 4 from top to bottom;
Described bowl portion, body and tapping hole adopt carbon in conjunction with light porous oxide-carbonaceous material, and described carbon in conjunction with the raw material components of light porous oxide-carbonaceous material and mass percent is: alumina hollow ball, 55%; Calcium hexaluminate, density is 0.8g/cm
3, 30%, 190 graphite; 3%; 595 graphite, 3%; Alloyed powder (Al:Mg mass ratio=0.5), 350 orders, 5%; Borax, granularity>=0.2mm, and < 0.5mm, 4%; The addition of phenol-formaldehyde resin powder be above-mentioned raw materials gross weight be 10%, the addition of furfural is 120% of phenol-formaldehyde resin powder weight.
Described slag line 3 adopts zirconium material with carbon element, and raw material components and the mass percent of described zirconium material with carbon element are: electric-melting zirconia 40 order, 50%; Electric-melting zirconia 100 order, 5%; Electric-melting zirconia 325 order 30%; 199 graphite 15%; The addition of phenol-formaldehyde resin powder is above-mentioned raw materials gross weight 4%, and the addition of furfural is 100% of phenol-formaldehyde resin powder weight.
The inwall of described bowl portion, body and tapping hole is compounded with liner, and the raw material components of described liner and mass percent are: calcium hexaluminate, and density is 3.1g/cm
3, 40 orders, 45%; 100 orders, 20%; 325 orders, 10%; Metal powder (Al:Mg mass ratio is 1:1), 200 orders, 10%; SiO
2, 15%, 350 orders; The addition of phenol-formaldehyde resin powder is above-mentioned raw materials gross weight 3%, and the addition of furfural is 90% of phenol-formaldehyde resin powder weight; GLYDOLN2002 addition is 10% of phenol-formaldehyde resin powder weight.
Carry out preparing burden and batch mixing according to such scheme respectively, first by raw material, phenol-formaldehyde resin powder is placed in high speed mixing smelting machine in advance after mixing 10min, blank is obtained after furfural and plasticizer being poured into the mixing 10min of glassware high speed degree again, blank is sieved, granularity≤3mm, then blank is carried out drying at 60 degree of baking ovens, control pressure fugitive constituent for being followed successively by 2.2%, 2.5%, 2.8%, then start to carry out material charging forming, submersed nozzle shaping mould Job's tears is put into the gum cover with base seal plug, then the cylinder of shaping liner is nested with on mould Job's tears, and inner lining material is filled the gap of cylinder and mould Job's tears, and then add bowl portion successively in the gap of cylinder and gum cover and expect, body material, slag line material, tapping hole material, after blank jolt ramming, cylinder is proposed along mould Job's tears length direction, finally seal with plug, isostatic compaction pressure 40MPa, dwell time 1min, heat-treating atmosphere N
2content is greater than 99.99vol%, its heat treatment maximum temperature 850 DEG C, temperature retention time 180min.Bowl portion, body, tapping hole part material performance: bulk density 1.72g/cm in this embodiment
3, the porosity 45%, thermal conductivity 7.8Wm
-1k
-1, strength at normal temperature and high temperature break resistant intensity are respectively 4.5MPa, 5.1MP; Slag line material performance: bulk density 3.65g/cm3, the porosity 13.1%, strength at normal temperature and high temperature break resistant intensity are respectively 7.5MPa, 9.2MPa; Liner material material property: bulk density 2.68g/cm3, the porosity 12.4%, strength at normal temperature 8.2MPa, Al
2o
3sedimentation rate-1.1/mm/h.
Embodiment 2
Described bowl portion, body and tapping hole adopt carbon in conjunction with light porous oxide-carbonaceous material, and described carbon in conjunction with the raw material components of light porous oxide-carbonaceous material and mass percent is: alumina hollow ball, 20%; Calcium hexaluminate, density is 0.7g/cm
3, 75%; Ultra-fine crystalline flake graphite (carbon content>=95%, particle size≤13 μm); 3%; Alloyed powder (Al:Mg mass ratio=2), 325 orders, 1%; Borax, granularity>=0.2mm, and < 0.5mm, 1%; The addition of phenol-formaldehyde resin powder be above-mentioned raw materials gross weight be 12%, the addition of furfural is 130% of phenol-formaldehyde resin powder weight.
Described slag line 3 adopts zirconium material with carbon element, and the raw material components of zirconium material with carbon element and mass percent are: electric-melting zirconia 40 order, 35%; Electric-melting zirconia 100 order,
20%; Electric-melting zirconia 325 order 33%; 199 graphite 6%, 595 graphite 6%; The addition of phenol-formaldehyde resin powder is above-mentioned raw materials gross weight 4.5%, and the addition of furfural is 100% of phenol-formaldehyde resin powder weight.
The inwall of described bowl portion, body and tapping hole is compounded with liner, and the raw material components of described liner and mass percent are: calcium hexaluminate, and density is 3.0g/cm
3, 40 orders, 10%; 100 orders, 30%; 325 orders, 40%; Al powder, 100 orders, 8%; Borax, 100 orders, 6%; Si powder, 350 orders, 6%; The addition of phenol-formaldehyde resin powder is 3% of above-mentioned raw materials gross weight, and the addition of furfural is 90% of phenol-formaldehyde resin powder weight; OPTAPIXPAF35 and ZUSOPLAST126/3 addition is respectively 2% and 3% of phenol-formaldehyde resin powder weight.
Carry out preparing burden and batch mixing according to such scheme respectively, first by raw material, phenol-formaldehyde resin powder is placed in high speed mixing smelting machine in advance after mixing 10min, blank is obtained after furfural and plasticizer being poured into the mixing 10min of glassware high speed degree again, blank is sieved, granularity≤3mm, then blank is carried out drying at 60 degree of baking ovens, control pressure fugitive constituent for being followed successively by 2.8%, 2.2%, 2.2%, then start to carry out material charging forming, submersed nozzle shaping mould Job's tears is put into the gum cover with base seal plug, then the cylinder of shaping liner is nested with on mould Job's tears, and inner lining material is filled the gap of cylinder and mould Job's tears, and then add bowl portion successively in the gap of cylinder and gum cover and expect, body material, slag line material, tapping hole material, after blank jolt ramming, cylinder is proposed along mould Job's tears length direction, finally seal with plug, isostatic compaction pressure 40MPa, dwell time 1min, heat-treating atmosphere N
2content is greater than 99.99vol%, its heat treatment maximum temperature 900 DEG C, temperature retention time 240min.Bowl portion, body, tapping hole part material performance: bulk density 1.82g/cm in this embodiment
3, the porosity 44%, thermal conductivity 8.8Wm
-1k
-1, strength at normal temperature and high temperature break resistant intensity are respectively 4.2MPa, 4.8MP; Slag line material performance: bulk density 3.70g/cm3, the porosity 14.0%, strength at normal temperature and high temperature break resistant intensity are respectively 7.2MPa, 8.6MPa; Liner material material property: bulk density 2.75g/cm3, the porosity 11.3%, strength at normal temperature 7.8MPa, Al
2o
3sedimentation rate-1.0/mm/h.
Embodiment 3
Described bowl portion, body and tapping hole adopt carbon in conjunction with light porous oxide-carbonaceous material, and described carbon in conjunction with the raw material components of light porous oxide-carbonaceous material and mass percent is: alumina hollow ball, 55%; Calcium hexaluminate, density is 1.0g/cm
3, 30%, 199 graphite; 2%; 599 graphite, 2%, 895 graphite, 1%; Alloyed powder (Al:Mg mass ratio=1), 325 orders, 8%; Boron glass powder, fusion temperature is 854 DEG C, granularity>=0.2mm, and < 0.5mm, 2%; The addition of phenol-formaldehyde resin powder be above-mentioned raw materials gross weight be 10%, the addition of furfural is 125% of phenolic resin weight.
Described slag line 3 adopts zirconium material with carbon element, and raw material components and the mass percent of described zirconium material with carbon element are: electric-melting zirconia 40 order, 20%; Electric-melting zirconia 100 order, 20%; Electric-melting zirconia 325 order 50%; 595 graphite 10%; The addition of phenol-formaldehyde resin powder is above-mentioned raw materials gross weight 8%, and the addition of furfural is 100% of phenol-formaldehyde resin powder weight.
The inwall of described bowl portion, body and tapping hole is compounded with liner, and the raw material components of described liner and mass percent are: calcium hexaluminate, and density is 3.0g/cm
3, 40 orders, 25%; 100 orders, 25%; 325 orders, 38%; Mg powder, 100 orders, 2%; SiC, 350 orders, 6%; B
4c, 350 orders, 4%; The addition of phenol-formaldehyde resin powder is above-mentioned raw materials gross weight 5%, and the addition of furfural is 100% of phenol-formaldehyde resin powder weight; ZUSOPLAST126/3 addition is 8% of phenol-formaldehyde resin powder weight.
Carry out preparing burden and batch mixing according to such scheme respectively, first by raw material, phenol-formaldehyde resin powder is placed in high speed mixing smelting machine in advance after mixing 10min, blank is obtained after furfural and plasticizer being poured into the mixing 10min of glassware high speed degree again, blank is sieved, granularity≤3mm, then blank is carried out drying at 60 degree of baking ovens, control pressure fugitive constituent for being followed successively by 2.5%, 2.8%, 2.7%, then start to carry out material charging forming, submersed nozzle shaping mould Job's tears is put into the gum cover with base seal plug, then the cylinder of shaping liner is nested with on mould Job's tears, and inner lining material is filled the gap of cylinder and mould Job's tears, and then add bowl portion successively in the gap of cylinder and gum cover and expect, body material, slag line material, tapping hole material, after blank jolt ramming, cylinder is proposed along mould Job's tears length direction, finally seal with plug, isostatic compaction pressure 40MPa, dwell time 1min, heat-treating atmosphere N
2content is greater than 99.99vol%, its heat treatment maximum temperature 1000 DEG C, temperature retention time 300min.Bowl portion, body, tapping hole part material performance: bulk density 1.75g/cm in this embodiment
3, the porosity 42%, thermal conductivity 8.8Wm
-1k
-1, strength at normal temperature and high temperature break resistant intensity are respectively 5.3MPa, 5.2MP; Slag line material performance: bulk density 3.70g/cm3, the porosity 14.9%, strength at normal temperature and high temperature break resistant intensity are respectively 6.5MPa, 7.2MPa; Liner material material property: bulk density 2.62g/cm3, the porosity 13.3%, strength at normal temperature 6.8MPa, Al
2o
3sedimentation rate-1.2/mm/h.
Embodiment 4
Described bowl portion, body and tapping hole adopt carbon in conjunction with light porous oxide-carbonaceous material, and described carbon in conjunction with the raw material components of light porous oxide-carbonaceous material and mass percent is: alumina hollow ball, 40%; Calcium hexaluminate, density is 0.8g/cm
3, 45%, 190 graphite; 2%; 890 graphite, 3%.; Alloyed powder (Al:Mg mass ratio=1.5), 325 orders, 8%; Boron glass powder, fusion temperature is 726 DEG C, granularity >=0.2mm, and < 0.5mm, 2%; The addition of phenol-formaldehyde resin powder is 9% of above-mentioned raw materials gross weight, and the addition of furfural is 120% of phenolic resin weight.
Described slag line 3 adopts zirconium material with carbon element, and raw material components and the mass percent of described zirconium material with carbon element are: electric-melting zirconia 40 order, 45%; Electric-melting zirconia 100 order, 20%; Electric-melting zirconia 325 order 30%; 199 graphite 5%; The addition of phenol-formaldehyde resin powder is 7% of above-mentioned raw materials gross weight, and the addition of furfural is 100% of phenol-formaldehyde resin powder weight.
The inwall of described bowl portion, body and tapping hole is compounded with liner, and the raw material components of described liner and mass percent are: calcium hexaluminate, and density is 2.8g/cm
3, 40 orders, 37%; 100 orders, 25%; 325 orders, 30%; Al powder, 200 orders, 2%; Si
3n
4, 350 orders, 2%; B
4c, 350 orders, 4%; The addition of phenol-formaldehyde resin powder is 6% of above-mentioned raw materials gross weight, and the addition of furfural is 100% of phenol-formaldehyde resin powder weight; GLYDOLN2002 addition is 9% of phenol-formaldehyde resin powder weight.
Carry out preparing burden and batch mixing according to such scheme respectively, first by raw material, phenol-formaldehyde resin powder is placed in high speed mixing smelting machine in advance after mixing 10min, blank is obtained after furfural and plasticizer being poured into the mixing 10min of glassware high speed degree again, blank is sieved, granularity≤3mm, then blank is carried out drying at 60 degree of baking ovens, control pressure fugitive constituent for being followed successively by 2.2%, 2.8%, 2.6%, then start to carry out material charging forming, submersed nozzle shaping mould Job's tears is put into the gum cover with base seal plug, then the cylinder of shaping liner is nested with on mould Job's tears, and inner lining material is filled the gap of cylinder and mould Job's tears, and then add bowl portion successively in the gap of cylinder and gum cover and expect, body material, slag line material, tapping hole material, after blank jolt ramming, cylinder is proposed along mould Job's tears length direction, finally seal with plug, isostatic compaction pressure 40MPa, dwell time 1min, heat-treating atmosphere N
2content is greater than 99.99vol%, its heat treatment maximum temperature 920 DEG C, temperature retention time 360min.Bowl portion, body, tapping hole part material performance: bulk density 1.92g/cm in this embodiment
3, the porosity 36%, thermal conductivity 9.2Wm
-1k
-1, strength at normal temperature and high temperature break resistant intensity are respectively 5.5MPa, 5.6MP; Slag line material performance: bulk density 3.95g/cm3, the porosity 15.9%, strength at normal temperature and high temperature break resistant intensity are respectively 6.2MPa, 6.8MPa; Liner material material property: bulk density 2.75g/cm3, the porosity 11.0%, strength at normal temperature 8.8MPa, Al
2o
3sedimentation rate-1.0/mm/h.
Embodiment 5
Described bowl portion, body and tapping hole adopt carbon in conjunction with light porous oxide-carbonaceous material, and described carbon in conjunction with the raw material components of light porous oxide-carbonaceous material and mass percent is: alumina hollow ball, 50%; Calcium hexaluminate, density is 1.0g/cm
3, 38%, 895 graphite, 3%.; Alloyed powder (Al:Mg mass ratio=1.2), 350 orders, 6%; Borax, granularity >=0.2mm, and < 0.5mm, 3%; The addition of phenol-formaldehyde resin powder be above-mentioned raw materials gross weight be 10%, the addition of furfural is 130% of phenolic resin weight.
Described slag line 3 adopts zirconium material with carbon element, and described slag line material raw material components and mass percent are: electric-melting zirconia 40 order, 40%; Electric-melting zirconia 100 order, 10%; Electric-melting zirconia 325 order 42%; 199 graphite 4%, 595 graphite 4%; The addition of phenol-formaldehyde resin powder is above-mentioned raw materials gross weight 5%, and the addition of furfural is 100% of phenol-formaldehyde resin powder weight.
The inwall of described bowl portion, body and tapping hole is compounded with liner, and the raw material components of described liner and mass percent are: calcium hexaluminate, and density is 3.0g/cm
3, 40 orders, 40%; 100 orders, 25%; 325 orders, 15%; Metal powder (Al:Mg mass ratio is 1:1), 200 orders, 5%; SiO
2, 350 orders, 10%; BN, 200 orders, 5%; The addition of phenol-formaldehyde resin powder is 3% of above-mentioned raw materials gross weight, and the addition of furfural is 90% of phenol-formaldehyde resin powder weight; GLYDOLN2002 addition is 10% of phenol-formaldehyde resin powder weight.
Carry out preparing burden and batch mixing according to such scheme respectively, first by raw material, phenol-formaldehyde resin powder is placed in high speed mixing smelting machine in advance after mixing 10min, blank is obtained after furfural and plasticizer being poured into the mixing 10min of glassware high speed degree again, blank is sieved, granularity≤3mm, then blank is carried out drying at 60 degree of baking ovens, control pressure fugitive constituent for being followed successively by 2.4%, 2.5%, 2.4%, then start to carry out material charging forming, submersed nozzle shaping mould Job's tears is put into the gum cover with base seal plug, then the cylinder of shaping liner is nested with on mould Job's tears, and inner lining material is filled the gap of cylinder and mould Job's tears, and then add bowl portion successively in the gap of cylinder and gum cover and expect, body material, slag line material, tapping hole material, after blank jolt ramming, cylinder is proposed along mould Job's tears length direction, finally seal with plug, dwell time 1min, heat-treating atmosphere N
2content is greater than 99.99vol%, its heat treatment maximum temperature 1000 DEG C, temperature retention time 300min.Bowl portion, body, tapping hole part material performance: bulk density 1.64g/cm in this embodiment
3, the porosity 55%, thermal conductivity 5.4Wm
-1k
-1, strength at normal temperature and high temperature break resistant intensity are respectively 4.0MPa, 4.5MP; Slag line material performance: bulk density 3.78g/cm3, the porosity 14.5%, strength at normal temperature and high temperature break resistant intensity are respectively 7.5MPa, 7.8MPa; Liner material material property: bulk density 2.60g/cm3, the porosity 14.5%, strength at normal temperature 7.8MPa, Al
2o
3sedimentation rate-1.3/mm/h.
Embodiment 6
A kind of submersed nozzle, described submersed nozzle is made up of four positions, and four positions are followed successively by bowl portion 1, body 2, slag line 3 and tapping hole 4 from top to bottom;
Described bowl portion, body and tapping hole adopt carbon in conjunction with light porous oxide-carbonaceous material, and described carbon in conjunction with the raw material components of light porous oxide-carbonaceous material and mass percent is: alumina hollow ball, 50%; Calcium hexaluminate, density is 0.8g/cm
3, 35%, 190 graphite; 2%; 595 graphite, 2%.599 graphite, 1%; Ultra-fine crystalline flake graphite (carbon content >=95%, particle size≤13 μm), 1%; Alloyed powder (Al:Mg mass ratio=0.9), 350 orders, 5%; Borax, granularity >=0.2mm, and < 0.5mm, 4%; The addition of phenol-formaldehyde resin powder be above-mentioned raw materials gross weight be 10%, the addition of furfural is 120% of phenol-formaldehyde resin powder weight.
Described slag line 3 adopts zirconium material with carbon element, and raw material components and the mass percent of described zirconium material with carbon element are: electric-melting zirconia 40 order, 30%; Electric-melting zirconia 100 order, 20%; Electric-melting zirconia 325 order 40%; 595 graphite 10%; The addition of phenol-formaldehyde resin powder is above-mentioned raw materials gross weight 6%, and the addition of furfural is 100% of phenol-formaldehyde resin powder weight.
The inwall of described bowl portion, body and tapping hole is compounded with liner, and the raw material components of described liner and mass percent are: calcium hexaluminate, and density is 3.1g/cm
3, 40 orders, 40%; 100 orders, 20%; 325 orders, 15%; Metal powder (Al:Mg mass ratio is 1:1), 200 orders, 10%; SiO
2, 10%, 350 orders; B
2o
3, 5%, 350 orders; The addition of phenol-formaldehyde resin powder is 4% of above-mentioned raw materials gross weight, and the addition of furfural is 90% of phenol-formaldehyde resin powder weight; GLYDOLN2002 addition is 10% of phenol-formaldehyde resin powder weight.
Carry out preparing burden and batch mixing according to such scheme respectively, first by raw material, phenol-formaldehyde resin powder is placed in high speed mixing smelting machine in advance after mixing 10min, blank is obtained after furfural and plasticizer being poured into the mixing 10min of glassware high speed degree again, blank is sieved, granularity≤3mm, then blank is carried out drying at 60 degree of baking ovens, control pressure fugitive constituent for being followed successively by 2.3%, 2.2%, 2.3%, then start to carry out material charging forming, submersed nozzle shaping mould Job's tears is put into the gum cover with base seal plug, then the cylinder of shaping liner is nested with on mould Job's tears, and inner lining material is filled the gap of cylinder and mould Job's tears, and then add bowl portion successively in the gap of cylinder and gum cover and expect, body material, slag line material, tapping hole material, after blank jolt ramming, cylinder is proposed along mould Job's tears length direction, finally seal with plug, isostatic compaction pressure 40MPa, dwell time 1min, heat-treating atmosphere N
2content is greater than 99.99vol%, its heat treatment maximum temperature 870 DEG C, temperature retention time 240min.Bowl portion, body, tapping hole part material performance: bulk density 1.68g/cm in this embodiment
3, the porosity 54%, thermal conductivity 6.1Wm
-1k
-1, strength at normal temperature and high temperature break resistant intensity are respectively 4.1MPa, 4.0MP; Slag line material performance: bulk density 3.75g/cm3, the porosity 14.3%, strength at normal temperature and high temperature break resistant intensity are respectively 8.0MPa, 8.8MPa; Liner material material property: bulk density 2.67g/cm3, the porosity 14.5%, strength at normal temperature 8.8MPa, Al
2o
3sedimentation rate-1.2/mm/h.
Embodiment 7
Described bowl portion, body and tapping hole adopt carbon in conjunction with light porous oxide-carbonaceous material, and described carbon in conjunction with the raw material components of light porous oxide-carbonaceous material and mass percent is: alumina hollow ball, 25%; Calcium hexaluminate, density is 0.7g/cm
3, 70%; Ultra-fine crystalline flake graphite (carbon content>=95%, particle size≤13 μm); 3%; Alloyed powder (Al:Mg mass ratio=2), 325 orders, 1%; Borax, granularity>=0.2mm, and < 0.5mm, 1%; The addition of phenol-formaldehyde resin powder be above-mentioned raw materials gross weight be 12%, the addition of furfural is 130% of phenol-formaldehyde resin powder weight.
Described slag line 3 adopts zirconium material with carbon element, and raw material components and the mass percent of described zirconium material with carbon element are: electric-melting zirconia 40 order, 40%; Electric-melting zirconia 100 order, 10%; Electric-melting zirconia 325 order 45%; 595 graphite 5%; The addition of phenol-formaldehyde resin powder is above-mentioned raw materials gross weight 4.5%, and the addition of furfural is 100% of phenol-formaldehyde resin powder weight.
The inwall of described bowl portion, body and tapping hole is compounded with liner, and the raw material components of described liner and mass percent are: calcium hexaluminate, and density is 3.0g/cm
3, 40 orders, 15%; 100 orders, 30%; 325 orders, 35%; Al powder, 100 orders, 8%; B
2o
3, 200 orders, 3%; Borax, 100 orders, 3%; Si powder, 350 orders, 6%; The addition of phenol-formaldehyde resin powder is above-mentioned raw materials gross weight 3%, and the addition of furfural is 90% of phenol-formaldehyde resin powder weight; OPTAPIXPAF35 and ZUSOPLAST126/3 addition is respectively 2% and 3% of phenol-formaldehyde resin powder weight.
Carry out preparing burden and batch mixing according to such scheme respectively, first by raw material, phenol-formaldehyde resin powder is placed in high speed mixing smelting machine in advance after mixing 10min, blank is obtained after furfural and plasticizer being poured into the mixing 10min of glassware high speed degree again, blank is sieved, granularity≤3mm, then blank is carried out drying at 60 degree of baking ovens, control pressure fugitive constituent for being followed successively by 2.3%, 2.6%, 2.6%, then start to carry out material charging forming, submersed nozzle shaping mould Job's tears is put into the gum cover with base seal plug, then the cylinder of shaping liner is nested with on mould Job's tears, and inner lining material is filled the gap of cylinder and mould Job's tears, and then add bowl portion successively in the gap of cylinder and gum cover and expect, body material, slag line material, tapping hole material, after blank jolt ramming, cylinder is proposed along mould Job's tears length direction, finally seal with plug, isostatic compaction pressure 40MPa, dwell time 1min, heat-treating atmosphere N
2content is greater than 99.99vol%, its heat treatment maximum temperature 980 DEG C, temperature retention time 300min.Bowl portion, body, tapping hole part material performance: bulk density 1.78g/cm in this embodiment
3, the porosity 41%, thermal conductivity 8.8Wm
-1k
-1, strength at normal temperature and high temperature break resistant intensity are respectively 5.1MPa, 5.0MP; Slag line material performance: bulk density 3.75g/cm3, the porosity 14.3%, strength at normal temperature and high temperature break resistant intensity are respectively 8.0MPa, 8.8MPa; Liner material material property: bulk density 2.67g/cm3, the porosity 14.5%, strength at normal temperature 8.8MPa, Al
2o
3sedimentation rate-1.2/mm/h.
Embodiment 8
Described bowl portion, body and tapping hole adopt carbon in conjunction with light porous oxide-carbonaceous material, and described carbon in conjunction with the raw material components of light porous oxide-carbonaceous material and mass percent is: alumina hollow ball, 25%; Calcium hexaluminate, density is 0.7g/cm
3, 70%; Ultra-fine crystalline flake graphite (carbon content>=95%, particle size≤13 μm); 3%; Alloyed powder (Al:Mg mass ratio=1.4), 325 orders, 1%; Borax, granularity>=0.2mm, and < 0.5mm, 1%; The addition of phenol-formaldehyde resin powder be above-mentioned raw materials gross weight be 12%, the addition of furfural is 130% of phenol-formaldehyde resin powder weight.
Described slag line 3 adopts zirconium material with carbon element, and raw material components and the mass percent of described zirconium material with carbon element are: electric-melting zirconia 40 order, 35%; Electric-melting zirconia 100 order, 15%; Electric-melting zirconia 325 order 42%; 199 graphite 8%; The addition of phenol-formaldehyde resin powder is above-mentioned raw materials gross weight 5.5%, and the addition of furfural is 100% of phenol-formaldehyde resin powder weight.
The inwall of described bowl portion, body and tapping hole is compounded with liner, and the raw material components of described liner and mass percent are: calcium hexaluminate, and density is 3.0g/cm
3, 40 orders, 15%; 100 orders, 28%; 325 orders, 35%; Al powder, 100 orders, 8%; B
2o
3, 200 orders, 2%; Si powder, 350 orders, 6%, Si
3n
4, 350 orders, 2%; B
4c, 350 orders, 4%; The addition of phenol-formaldehyde resin powder is 3% of above-mentioned raw materials gross weight, and the addition of furfural is 90% of phenol-formaldehyde resin powder weight; OPTAPIXPAF35 and ZUSOPLAST126/3 addition is respectively 2% and 3% of phenol-formaldehyde resin powder weight.
Carry out preparing burden and batch mixing according to such scheme respectively, first by raw material, phenol-formaldehyde resin powder is placed in high speed mixing smelting machine in advance after mixing 10min, blank is obtained after furfural and plasticizer being poured into the mixing 10min of glassware high speed degree again, blank is sieved, granularity≤3mm, then blank is carried out drying at 60 degree of baking ovens, control pressure fugitive constituent for being followed successively by 2.3%, 2.6%, 2.6%, then start to carry out material charging forming, submersed nozzle shaping mould Job's tears is put into the gum cover with base seal plug, then the cylinder of shaping liner is nested with on mould Job's tears, and inner lining material is filled the gap of cylinder and mould Job's tears, and then add bowl portion successively in the gap of cylinder and gum cover and expect, body material, slag line material, tapping hole material, after blank jolt ramming, cylinder is proposed along mould Job's tears length direction, finally seal with plug, isostatic compaction pressure 40MPa, dwell time 1min, heat-treating atmosphere N
2content is greater than 99.99vol%, its heat treatment maximum temperature 1000 DEG C, temperature retention time 240min.Bowl portion, body, tapping hole part material performance: bulk density 1.69g/cm in this embodiment
3, the porosity 55%, thermal conductivity 5.9Wm
-1k
-1, strength at normal temperature and high temperature break resistant intensity are respectively 4.5MPa, 4.5MP; Slag line material performance: bulk density 3.79g/cm3, the porosity 14.8%, strength at normal temperature and high temperature break resistant intensity are respectively 7.8MPa, 8.5MPa; Liner material material property: bulk density 2.77g/cm3, the porosity 12.5%, strength at normal temperature 9.6MPa, Al
2o
3sedimentation rate-1.0/mm/h.
Claims (10)
1. a submersed nozzle, described submersed nozzle is made up of four positions, and four positions are followed successively by a bowl portion, body, slag line and tapping hole from top to bottom; Described slag line adopts zirconium material with carbon element; It is characterized in that: described bowl portion, body and tapping hole adopt carbon in conjunction with light porous oxide-carbonaceous material; Described carbon comprises aerobic aluminium hollow ball, calcium hexaluminate and graphite in conjunction with the raw material of light porous oxide-carbonaceous material; Granularity≤the 1mm of described alumina hollow ball, the granularity≤0.2mm of described calcium hexaluminate, density is 0.7g/cm
3~ 1.0g/cm
3; Described carbon is added with phenol-formaldehyde resin powder and furfural in conjunction with light porous oxide-carbonaceous material is also outer;
The inwall of described bowl portion, body, slag line and tapping hole is compounded with liner, includes calcium hexaluminate and acidic materials in the raw material of described liner or the material forming acidic materials can be transformed under high-temperature molten steel atmosphere; The density of described calcium hexaluminate is 2.8g/cm
3~ 3.1g/cm
3; Described liner is also outer is added with phenol-formaldehyde resin powder, furfural and plasticizer.
2. a kind of submersed nozzle as claimed in claim 1, is characterized in that: the raw material of described liner also adds metal powder; Described metal powder is one or both the mixing in Al powder, Mg powder, and the granularity of metal powder is 100 order ~ 350 orders.
3. a kind of submersed nozzle as claimed in claim 1, it is characterized in that: the inwall of described bowl portion, body, slag line and tapping hole is compounded with liner, the raw material components of described liner and mass percent are: calcium hexaluminate 40 order 10% ~ 45%, calcium hexaluminate 100 order 20% ~ 30%, calcium hexaluminate 325 order 10% ~ 40%; Acidic materials or can transform under high-temperature molten steel atmosphere and form the material 5% ~ 15% of acidic materials; Metal powder 2% ~ 10%; The addition of described phenol-formaldehyde resin powder is 3% ~ 6% of liner raw material gross weight, and the addition of furfural is 90 ~ 110% of phenol-formaldehyde resin powder weight; The addition of plasticizer is 5% ~ 10% of phenol-formaldehyde resin powder weight.
4. a kind of submersed nozzle as claimed in claim 1, is characterized in that: described acidic materials are SiO
2, B
2o
3, one or both in borax.
5. a kind of submersed nozzle as claimed in claim 1, is characterized in that: can transform the material forming acidic materials under high-temperature molten steel atmosphere is Si powder, SiC, Si
3n
4, BN, B
4one or more in C, the granularity of acidic materials is 100 order ~ 350 orders.
6. a kind of submersed nozzle as claimed in claim 1, is characterized in that: also add alloyed powder and low-melting-point material in the raw material of described carbon in conjunction with light porous oxide-carbonaceous material.
7. a kind of submersed nozzle as claimed in claim 6, it is characterized in that: carbon is the mixture of Al powder and Mg powder in conjunction with the alloyed powder described in light porous oxide-carbonaceous material, wherein the mass ratio of Al powder and Mg powder is 0.5 ~ 2, and granularity is 100 order ~ 350 orders.
8. a kind of submersed nozzle as claimed in claim 6, it is characterized in that: described low-melting-point material is one or both in borax or boron glass powder, described borax granularity >=0.2mm, and < 0.5mm, the fusion temperature of described boron glass powder is 700 DEG C ~ 1000 DEG C, and granularity is 200 order ~ 350 orders.
9. a kind of submersed nozzle as claimed in claim 1, it is characterized in that: carbon is 190 graphite, 199 graphite, 595 graphite, 599 graphite, 890 graphite, 895 graphite, carbon content >=95% in conjunction with the graphite described in light porous oxide-carbonaceous material, one or more in the ultra-fine crystalline flake graphite of particle size≤13 μm.
10. a kind of submersed nozzle as claimed in claim 1, it is characterized in that: described bowl portion, body and tapping hole adopt carbon in conjunction with light porous oxide-carbonaceous material, described carbon in conjunction with the raw material components of light porous oxide-carbonaceous material and mass percent is: alumina hollow ball 20% ~ 55%, calcium hexaluminate 30% ~ 75%
,graphite 3% ~ 6%, alloyed powder, 1% ~ 8%, low-melting-point material, 1% ~ 4%; Carbon is that carbon is in conjunction with 8% ~ 12% of light porous oxide-carbonaceous material raw material gross weight in conjunction with the addition of phenol-formaldehyde resin powder described in light porous oxide-carbonaceous material; The addition of described furfural is 120% ~ 130% of phenol-formaldehyde resin powder weight.
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| CN201510526430.1A CN105170968B (en) | 2015-08-26 | 2015-08-26 | A kind of submersed nozzle |
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| JP2017192973A (en) * | 2016-04-21 | 2017-10-26 | 新日鐵住金株式会社 | Nozzle refractory for continuous casting, and nozzle for continuous casting |
| CN113087539A (en) * | 2021-05-18 | 2021-07-09 | 江苏泰瑞耐火有限公司 | Refractory material for zirconia composite metering nozzle and application thereof |
| CN113277861A (en) * | 2021-05-18 | 2021-08-20 | 江苏泰瑞耐火有限公司 | Refractory material for submerged nozzle and application thereof |
| CN113458376A (en) * | 2021-07-14 | 2021-10-01 | 湖州屹鑫节能材料科技有限公司 | Preparation process of quick-change water gap combined structure and machining die thereof |
| CN114163228A (en) * | 2021-12-30 | 2022-03-11 | 马鞍山利尔开元新材料有限公司 | Slag-stopping sliding plate of aluminum-calcium-carbon converter and preparation method thereof |
| CN114346229A (en) * | 2022-01-12 | 2022-04-15 | 中钢集团洛阳耐火材料研究院有限公司 | Method for testing submerged nozzle accretion |
| CN115229173A (en) * | 2022-06-24 | 2022-10-25 | 攀钢集团攀枝花钢铁研究院有限公司 | High-cleanness steel continuous casting intermediate nozzle pocket brick with filtering function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2017192973A (en) * | 2016-04-21 | 2017-10-26 | 新日鐵住金株式会社 | Nozzle refractory for continuous casting, and nozzle for continuous casting |
| CN113277861B (en) * | 2021-05-18 | 2022-06-21 | 江苏泰瑞耐火有限公司 | Refractory material for submerged nozzle and application thereof |
| CN113087539A (en) * | 2021-05-18 | 2021-07-09 | 江苏泰瑞耐火有限公司 | Refractory material for zirconia composite metering nozzle and application thereof |
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| CN113458376A (en) * | 2021-07-14 | 2021-10-01 | 湖州屹鑫节能材料科技有限公司 | Preparation process of quick-change water gap combined structure and machining die thereof |
| CN113458376B (en) * | 2021-07-14 | 2022-09-30 | 湖州屹鑫节能材料科技有限公司 | Preparation process of quick-change water gap combined structure and machining die thereof |
| CN114163228A (en) * | 2021-12-30 | 2022-03-11 | 马鞍山利尔开元新材料有限公司 | Slag-stopping sliding plate of aluminum-calcium-carbon converter and preparation method thereof |
| CN114163228B (en) * | 2021-12-30 | 2022-09-06 | 马鞍山利尔开元新材料有限公司 | Slag-stopping sliding plate of aluminum-calcium-carbon converter and preparation method thereof |
| CN114346229A (en) * | 2022-01-12 | 2022-04-15 | 中钢集团洛阳耐火材料研究院有限公司 | Method for testing submerged nozzle accretion |
| CN114346229B (en) * | 2022-01-12 | 2024-03-15 | 中钢集团洛阳耐火材料研究院有限公司 | Method for testing submerged nozzle nodulation |
| CN115229173A (en) * | 2022-06-24 | 2022-10-25 | 攀钢集团攀枝花钢铁研究院有限公司 | High-cleanness steel continuous casting intermediate nozzle pocket brick with filtering function |
| CN115229173B (en) * | 2022-06-24 | 2024-05-07 | 攀钢集团攀枝花钢铁研究院有限公司 | High clean steel continuous casting intermediate nozzle pocket block with filtering function |
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