CN102503462B - Metal continuously cast composite slag line long nozzle and preparing method thereof - Google Patents
Metal continuously cast composite slag line long nozzle and preparing method thereof Download PDFInfo
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- CN102503462B CN102503462B CN 201110322013 CN201110322013A CN102503462B CN 102503462 B CN102503462 B CN 102503462B CN 201110322013 CN201110322013 CN 201110322013 CN 201110322013 A CN201110322013 A CN 201110322013A CN 102503462 B CN102503462 B CN 102503462B
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Abstract
The invention relates to a metal continuously cast composite slag line long nozzle and preparing method thereof, belonging to the technical field of fireproofing materials. Each of A main body, an internal slag line and an external slag line of the metal continuously cast composite slag line long nozzle comprises the following raw material components in parts by weight: (a) materials of the main body: 18-25 parts of graphite, 10-15 parts of high alumina bauxite 24#, 10-15 parts of high alumina bauxite 36#, 20-25 parts of brown emery powder 150-0#, 10-15 parts of quartz, 3-5 parts of silicon metal powder, 2-4 parts of silicon carbide powder and 1-3 parts of boron glass dust; (b) materials of the internal slag line: 18-25 parts of graphite, 15-25 parts of high alumina mullite 24#, 15-25 parts of high alumina mullite 36#, 20-25 parts of brown fused alumina powder 150-0#, 2-4 parts of silicon metal powder, 3-5 parts of silicon carbide powder and 3-5 parts of alumina powder; and (c) materials of the external slag line: 6-20 parts of graphite, 20-35 parts of high alumina mullite 36#, 15-35 parts of high alumina mullite 70#, 15-35 parts of brown fused alumina powder 150-0#, 1-3 parts of silicon metal powder and 1-3 parts of silicon carbide powder. The metal continuously cast composite slag line long nozzle of the invention has the characteristics of good thermal shock resistance, long service life and low production cost.
Description
Technical field
The present invention relates to a kind of metal continuous casting composite slag line long nozzle and preparation method thereof, belong to technical field of refractory materials.
Background technology
The continuous casting of metal long nozzle is metal casting melts transfer unit, is installed in to prevent molten steel oxidation between large bag and the tundish and mix slag.It is one of functional component of most critical in the casting process, also is disposable refractory component.To be molten steel carry the passage of tundish from large bag for it, and its function is that the protection molten steel is not oxidized, prevents that nitrogen from dissolving in or covering slag is sneaked into molten steel and prevents that molten steel from splashing, and guarantees that molten steel has a rational flow field and temperature field distribution in middle bag.The quality quality of long nozzle is directly connected to whether continuous casting process can normally carry out, length and the slab quality of continuous casting time.Specifically, slag line is the most important position of long nozzle, is the position of easy generation quality accident, is again to determine the long nozzle key position in work-ing life.
The conventional way of continuous casting of metal long nozzle of the prior art is that body material and slag line material are a kind of material, because composition and the component of the refractory materials that adopts are unreasonable, cause product high temperature resistant, thermal shock resistance is good not, anti-erosion, thermal shock strength are not high enough, antistrip performance is not good, cause continuous casting of metal long nozzle product work-ing life short, physical strength is low, material is easily peeled off and caused that molten steel mixes, slab quality is defective, and production cost is high.
Summary of the invention
Problem to be solved by this invention provide a kind of high temperature resistant, thermal shock resistance good, anti-erosion, thermal shock strength are good, antistripping excellence, long service life, the metal continuous casting composite slag line long nozzle that physical strength is high, production cost is low; The present invention provides its preparation method simultaneously.
Described metal continuous casting composite slag line long nozzle comprises body and slag line, and its technical essential is: slag line is composited by interior slag line and outer slag line; Body, interior slag line, outer slag line are comprised of from the refractory materials of different proportionings different components respectively, comprise following feed composition in parts by weight:
A. body material
B. interior slag line material
C. outer slag line material
Slag lining is the most important position of composite slag long nozzle, it is the position of easy generation quality accident, again to determine the mouth of a river key in work-ing life, the present invention adopts high alumina mullite particle and brown alundum powder to replace white fused alumina and brown corundum in granules as the slag line material aggregate, more than 16 hours, its density, resistance to fouling and uniformity coefficient are higher than white fused alumina and brown corundum in granules to the high alumina mullite particle through 1750 ℃ of high temperature sinterings.The contriver has taken into full account the inner resistance to erosion of composite slag long nozzle slag line, the outside anti-erosion of slag line, and the refractory materials of taking with it technical requirements to be complementary forms and proportioning.
The effect of various raw materials is respectively: the graphite good toughness, physical and chemical performance is excellent, have good high temperature resistant, self-lubricating, conduction, anti-thermal shock, the multiple performance such as corrosion-resistant; High aluminum-containing mullite have expand evenly, Heat stability is good, load softening point is high, the high temperature creep value is little, hardness is large, resistance to chemical corrosion is good; Metallic silicon power, carborundum powder have the characteristics such as thermal conductivity height, hot strength are large, antiwear heat resisting shake, anti-erosion; Brown alundum powder plays filling effect.Each raw material adopts unique proportioning, and meticulously mixed system is added the resol that carbon yield is high, intensity is good and made wedding agent in the preparation method, result of use is desirable, has significantly reduced cost, has improved anti-erosion, the resistance to erosion intensity of product, antistrip performance improves, and anti-thermal shock is stable obviously to be improved.
Simultaneously, in the design of the refractory materials of long nozzle body part, adopted alumine particle and brown alundum powder to replace usually using in the past white fused alumina and brown corundum in granules, can reach life requirements and reduce again cost.
High aluminum-containing mullite 24 among the present invention
#, high aluminum-containing mullite 36
#, high aluminum-containing mullite 70
#, alumine 24
#, alumine 36
#All adopt particle.The model of high aluminum-containing mullite and alumine represents granularity, and more the macrobead fineness is less for model.Other component is powder: graphite 40～200 orders; Quartzy 0.01～0.59mm; Metallic silicon power 20～200 orders; Carborundum powder 20～200 orders; Boron glass powder 320 orders; Aluminum oxide powder 20～200 orders.
Described metal continuous casting composite slag line long nozzle reaches following technical indicator:
Described metal continuous casting composite slag line long nozzle, preferred technical scheme is as follows:
Body, interior slag line, outer slag line are comprised of from the refractory materials of different proportionings different components respectively, comprise following feed composition in parts by weight:
A. body material
B. interior slag line material
C. outer slag line material
The preparation method of described metal continuous casting composite slag line long nozzle comprises the steps:
A. batch mixing:
According to drafting prescription accurate-metering body material, interior slag line material, outer each component of slag line material, drop into respectively in the high speed mixing smelting machine separately, spraying method adds each 1 part of phenolic resin binder, and high speed is mixing evenly, and is for subsequent use;
B. dry:
Drying equipment is dried and put into fixed temperature and humidity material storehouse after the serviceable condition and deposit, and is for subsequent use;
C. moulding:
The dry good raw material for refractory of step b packed into takes to meet in the gum cover of technical requirement on design, with isostatic pressing machine at 125 MPa forming under the pressure;
D. machined into:
With the molding semi product machined into to drawing requirement;
E. oven dry:
Work in-process are dried;
F. whitewash:
G. burn till:
Through 14 hours burn till, firing temperature was 800-900 ℃, and the burning kiln temperature is risen to 1020 ℃, and 1020 ℃ of lower insulations 50-60 minute;
H. the soldering iron shell is pasted zirconium matter fibrefelt, packing, the quality test warehousing after passing.
The manufacture method of described continuous casting of metal composite long runner gate is applicable to the manufacturing of the metal continuous cast long nozzle of all size model, and its specifications and models need to be selected according to practical situation.
Beneficial effect of the present invention is as follows:
(1) continuous casting of metal composite long runner gate of the present invention, have high temperature resistant, thermal shock resistance good, anti-erosion, thermal shock strength are good, antistripping excellence, long service life, the characteristics that physical strength is high, production cost is low;
(2) the invention solves long nozzle product weak point in work-ing life of the prior art, the problem that physical strength is low, production cost is high;
(3) continuous casting of metal composite long runner gate product of the present invention reaches following technical indicator:
Volume density 〉=2.3g/cm
3, strength at normal temperature 〉=5.5MPa, compressive strength 〉=19MPa, apparent porosity≤19%, thermal shock stable degree 〉=5 time; Indices all is up to state standards;
(4) manufacture method of metal continuous casting composite slag line long nozzle of the present invention is applicable to the manufacturing of the metal continuous cast long nozzle of all size model.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the enlarged view at I of the present invention position.
Among the figure: 1, annular argon sealing groove; 2, iron-clad; 3, body; 4, outer slag line; 5, interior slag line; 6, discharge hole; 7, the rim of a bowl; 8, Argon mouth; 9, argon blowing hole.
Embodiment
The invention will be further described below in conjunction with embodiment:
Shown in Fig. 1～2, metal continuous casting composite slag line long nozzle, comprise the rim of a bowl 7 of body 3, body 3 internal upper parts and the slag line of body 3 bottoms, bottom, the mouth of a river arranges discharge hole 6, its technical essential is: slag line is composited by interior slag line 5 and outer slag line 4, and the rim of a bowl 7 outer walls arrange Argon mouth 8, and Argon mouth 8 is fixed on the rim of a bowl 7 outer walls by iron-clad 2, the rim of a bowl 7 inwalls arrange annular argon sealing groove 1, and annular argon sealing groove 1 is connected by argon blowing hole 9 with Argon mouth 8.Argon mouth 8 connects argon-blowing device, plays the effect of blowing argon molten steel during work.
One, batching such as the table 1 of embodiment 1～5.
Table 1 embodiment 1～5 allocation sheet
Two, the preparation method of embodiment 1～5 is as follows:
A. batch mixing:
The body material: will drop into behind each component accurate-metering of body material in the body material high speed mixing smelting machine, spraying method adds 1 part of phenolic resin binder, and high speed is mixing evenly, and is for subsequent use;
Interior slag line material: in slag line material high speed mixing smelting machine in dropping into behind each component accurate-metering of interior slag line material, spraying method adds 1 part of phenolic resin binder, and high speed is mixing evenly, and is for subsequent use;
Outer slag line material: will drop into behind each component accurate-metering of outer slag line material in the outer slag line material high speed mixing smelting machine, spraying method adds 1 part of phenolic resin binder, and high speed is mixing evenly, and is for subsequent use;
B. dry:
With the body material of step a preparation, interior slag line material, outer slag line material respectively drying equipment dry and put into fixed temperature and humidity material storehouse behind the standard fugitive constituent state and deposit, for subsequent use;
C. moulding:
Dry good body material, interior slag line material, the three kinds of raw material for refractory of outer slag line material of step b are packed into take to meet in the gum cover of technical requirement on design, with isostatic pressing machine at 125 MPa forming under the pressure;
D. machined into:
With work in-process after the moulding with machined into to drawing requirement;
E. oven dry:
With the oven dry of the work in-process after the processing;
F. whitewash:
Product whitewashes 2 times after will drying, the standby burning;
G. burn till:
Through 14 hours burn till, firing temperature was 900 ℃, and the burning kiln temperature is risen to 1020 ℃, and 1020 ℃ of lower insulations 50-60 minute;
H. the soldering iron shell is pasted zirconium matter fibrefelt, packing, the quality test warehousing after passing.
Three, the product performance index of embodiment 1～5 is as follows:
The metal continuous casting composite slag line long nozzle result of use that embodiment 1 makes is better, can reach work-ing life about 12 hours, than 2 hours work-ing life of original raising, reaches following technical indicator:
The metal continuous casting composite slag line long nozzle result of use that embodiment 2 makes is better, and improved 2 hour than original 10 hours work-ing life, reaches following technical indicator:
The metal continuous casting composite slag line long nozzle result of use that embodiment 3 makes is better, and improved 1.5 hour than original 10 hours work-ing life, reaches following technical indicator:
The metal continuous casting composite slag line long nozzle result of use that embodiment 4 makes is better, and improved 1.5 hour than original 10 hours work-ing life, reaches following technical indicator:
The metal continuous casting composite slag line long nozzle result of use that embodiment 5 makes is better, and improved 1.5 hour than original 10 hours work-ing life, reaches following technical indicator:
As known from the above, described metal continuous casting composite slag line long nozzle result of use is better, and the life-span is high, resistance to erosion, and anti-erosion, the anti-thermal shock good stability is produced in batches.
Four, raw materials manufacturer is as shown in table 2 below in the embodiment of the invention.
Table 2 starting material manufacturer table
| Title | Particle diameter or specification | The standard of carrying out | Manufacturer |
| Graphite | Particle diameter 180～200 orders | GB/T3518-2004 | Qingdao emerging magnificent graphite product company limited |
| Alumine | 24 #、36 # | YB/T5179-2005 | Yushan, Meng County refractory factory |
| High aluminum-containing mullite | 24 #、36 #、70 # | - | Mei He Fuan, Zhengzhou fire-resistant abrasive material factory |
| Brown alundum powder | 150-0 # | YB/T2478-2004 | Water abrasive material company limited is sprouted in the Zhou village |
| Quartzy | Particle diameter 0.59～0.21mm | YB/T115-2004 | Mining industry company limited is received in the Donghai County sea |
| Metallic silicon power | Particle diameter 180～200 orders | GB/T2881-2004 | Fushun County distance of travel of roc mining industry company limited |
| Carborundum powder | Particle diameter 180～200 orders | - | Permanent Xinda, Tengzhou company limited |
| The boron glass powder | Particle diameter 320 orders | - | Warm grinding tool auxiliary material company limited in Zibo |
| Aluminum oxide powder | Particle diameter 180～200 orders | YS/T89-2005 | Zibo Dong Run industry and trade company limited |
| Phenolic resin binder | 214-C | YB/T4131-2005 | Chemical industry company limited makes a concerted effort in Qingdao |
Claims (3)
1. a metal continuous casting composite slag line long nozzle comprises body and slag line, it is characterized in that slag line is composited by interior slag line and outer slag line; Body, interior slag line, outer slag line are comprised of from the refractory materials of different proportionings different components respectively, comprise following feed composition in parts by weight:
A. body material
B. interior slag line material
C. outer slag line material
2. metal continuous casting composite slag line long nozzle according to claim 1 is characterized in that described metal continuous casting composite slag line long nozzle reaches following technical indicator:
3. the preparation method of a metal continuous casting composite slag line long nozzle claimed in claim 1 is characterized in that comprising the steps:
A. batch mixing:
According to drafting prescription accurate-metering body material, interior slag line material, outer each component of slag line material, drop into respectively in the high speed mixing smelting machine separately, spraying method adds each 1 part of phenolic resin binder, and high speed is mixing evenly, and is for subsequent use;
B. dry:
Drying equipment is dried and put into fixed temperature and humidity material storehouse after the serviceable condition and deposit, and is for subsequent use;
C. moulding:
The dry good raw material for refractory of step b packed into takes to meet in the gum cover of technical requirement on design, with isostatic pressing machine at 125 MPa forming under the pressure;
D. machined into:
With the molding semi product machined into to drawing requirement;
E. oven dry:
Work in-process are dried;
F. whitewash:
Product whitewashes 2 times after will drying, the standby burning;
G. burn till:
Through 14 hours burn till, firing temperature was 800-900 ℃, and the burning kiln temperature is risen to 1020 ℃, and 1020 ℃ of lower insulations 50-60 minute;
H. the soldering iron shell is pasted zirconium matter fibrefelt, packing, the quality test warehousing after passing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110322013 CN102503462B (en) | 2011-10-21 | 2011-10-21 | Metal continuously cast composite slag line long nozzle and preparing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110322013 CN102503462B (en) | 2011-10-21 | 2011-10-21 | Metal continuously cast composite slag line long nozzle and preparing method thereof |
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| CN102503462A CN102503462A (en) | 2012-06-20 |
| CN102503462B true CN102503462B (en) | 2013-05-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108947548A (en) * | 2018-07-23 | 2018-12-07 | 山东东耐高温材料股份有限公司 | Inexpensive slab ventilating filling pipe end and preparation method thereof |
| CN108947550B (en) * | 2018-08-21 | 2021-07-16 | 山东东耐高温材料股份有限公司 | Bottom pouring furnace plug rod and preparation method thereof |
| CN112778001A (en) * | 2019-11-04 | 2021-05-11 | 江苏高鑫高温新材料科技有限公司 | Submersed nozzle and preparation method thereof |
| CN112756599A (en) * | 2019-11-04 | 2021-05-07 | 江苏高鑫高温新材料科技有限公司 | Long nozzle and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1530195A (en) * | 2003-03-14 | 2004-09-22 | 鞍山市东方巨业高级陶瓷有限公司 | Non-drying carbon-free long runner |
| CN101704099A (en) * | 2009-12-09 | 2010-05-12 | 山东东耐高温材料有限公司 | Tundish quick-replaceable sewage outlet used for metal continuous casting plate blank |
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- 2011-10-21 CN CN 201110322013 patent/CN102503462B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1530195A (en) * | 2003-03-14 | 2004-09-22 | 鞍山市东方巨业高级陶瓷有限公司 | Non-drying carbon-free long runner |
| CN101704099A (en) * | 2009-12-09 | 2010-05-12 | 山东东耐高温材料有限公司 | Tundish quick-replaceable sewage outlet used for metal continuous casting plate blank |
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| CN102503462A (en) | 2012-06-20 |
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