CN1176764C - Manufacturing technology of continuous casting carbonless nozzle - Google Patents
Manufacturing technology of continuous casting carbonless nozzle Download PDFInfo
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- CN1176764C CN1176764C CNB021448272A CN02144827A CN1176764C CN 1176764 C CN1176764 C CN 1176764C CN B021448272 A CNB021448272 A CN B021448272A CN 02144827 A CN02144827 A CN 02144827A CN 1176764 C CN1176764 C CN 1176764C
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- Prior art keywords
- carbon
- carbonless
- continuous casting
- drying
- river
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- Expired - Fee Related
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000009749 continuous casting Methods 0.000 title claims abstract description 17
- 238000005516 engineering process Methods 0.000 title abstract description 4
- 238000001035 drying Methods 0.000 claims abstract description 18
- 239000011347 resin Substances 0.000 claims abstract description 9
- 229920005989 resin Polymers 0.000 claims abstract description 9
- 238000007873 sieving Methods 0.000 claims abstract description 7
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 7
- 239000011777 magnesium Substances 0.000 claims description 11
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 7
- 239000004567 concrete Substances 0.000 claims description 6
- 238000005469 granulation Methods 0.000 claims description 6
- 230000003179 granulation Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
- 229910052749 magnesium Inorganic materials 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 20
- 239000010959 steel Substances 0.000 abstract description 20
- 239000000463 material Substances 0.000 abstract description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 abstract description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052593 corundum Inorganic materials 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract description 2
- 239000000377 silicon dioxide Substances 0.000 abstract description 2
- 229910000861 Mg alloy Inorganic materials 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 13
- 239000002893 slag Substances 0.000 description 10
- 239000011449 brick Substances 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 7
- 239000003963 antioxidant agent Substances 0.000 description 6
- 230000003078 antioxidant effect Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 239000011819 refractory material Substances 0.000 description 6
- 229910002804 graphite Inorganic materials 0.000 description 5
- 239000010439 graphite Substances 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- 239000003575 carbonaceous material Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- -1 aluminium zirconium-magnesium Chemical compound 0.000 description 2
- 239000010431 corundum Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- RQMIWLMVTCKXAQ-UHFFFAOYSA-N [AlH3].[C] Chemical compound [AlH3].[C] RQMIWLMVTCKXAQ-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000003064 anti-oxidating effect Effects 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 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 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000011863 silicon-based powder Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
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- Compositions Of Oxide Ceramics (AREA)
Abstract
The present invention relates to a manufacturing technology for continuous casting carbonless nozzles, which comprises a body, wherein a carbonless layer is combined in an inner hole of the body. The manufacturing technology has the following steps: proportionally mixing 2 to 3 portions of ZrO2, 3 to 4 portions of Al2O3, 1 to 2 portions of SiO2 and 0.1 to 0.5 portion of Mg alloy; adding thermosetting resin for granulating; drying at 70 to 85 DEG C on a flowing drying bed, and sieving by using a vibration sieve after drying to form mud material; selecting the mud material which is smaller than 2mm after sieving, and combining and forming with the body by adopting isostatic press. The carbonless layer of the present invention is capable of acting for a long time and has an obvious inhibiting effect on the recarburization of liquid steel, and carbonless material and the body can be well combined; the present invention is provided with a continuous casting carbonless water gap with low thermal expansion coefficient.
Description
Technical field: the manufacture craft that the present invention relates to a kind of carbon-free mouth of a river of continuous casting refractory material-continuous casting of steelmaking process use.
Background technology: at present, it is very difficult that the carbon of mild steel will reach 30PPM.The graphite of refractory material when the 2-3PPM in the carbon content derives from continuous casting, the carbon-free mouth of a river is that continuous casting functional material very popular in the present fire-resistant industry (is seen " special steel " 1999.20 (supplementary issue) 57-59, refractory material is to the influence of the degree of purity of steel, and war is conquered east, Jiang Zhouhua etc. shown); The production method of U.S. Vesuvius (VESUVIUS) is that carbonaceous material is carried out naked burning, remove the graphite on refractory material top layer, overcome carburetting, play a role clearly and (see that Liao Jianguo translates at cast initial stage molten steel, " external refractory material " 1998.23 (10): 58, " continuous casting is with carbon-free and SiO
2The development at the matter mouth of a river "), but the problem of bringing simultaneously is that this layer is more loose, and the flushing time of anti-molten steel is shorter; The carbon-free mouth of a river in day this product river is to utilize spinelle to be material of main part (see Japan Patent: the spy opens flat 9-201658); The problem of reflection also is to use time ratio shorter when Baosteel is on probation, and domestic research mainly is to be material of main part with silicon nitride, Sialon or A Long, and maximum problem is that low temperature intensity is not high, and is harsh to using atmosphere to require.
Summary of the invention: in order to address the above problem, the invention provides a kind of no carbon-coating that cooperates with the body material, carburetting to molten steel has the obvious suppression effect, and carbon-free material and body associativity are good, have the manufacture craft at the carbon-free mouth of a river of continuous casting of low thermal coefficient of expansion.
Concrete technical scheme is as follows: the manufacture craft at the carbon-free mouth of a river of a kind of continuous casting, and the mouth of a river comprises body, does not have carbon-coating at the compound one deck of the endoporus of body, concrete manufacture craft is as follows:
1. by weight a part batching, with ZrO
22-3 part Al
2O
33-4 part SiO
21-2 part magnesium A Long Mg ALON 0.1-0.5 part mix;
2. above-mentioned each component is added thermosetting resin and carry out mixing granulation;
3. carry out drying through the drying bed that flows at 70-85 ℃;
4. drying forms pug after vibratory sieve sieves;
5. choosing＜2mm pug after sieving, employing waits static pressure and body composite molding.
Compare with prior art, the present invention does not have aluminium zirconium-magnesium A Long Mg ALON based material that carbon-coating is selected for use, make it when middle low temperature, to have bigger intensity, have thermal coefficient of expansion low, thermal conductivity factor is low, can make the internal-external temperature difference of no carbon-coating big in use, reduced the temperature of articles gradient, improve the thermal-shock resistance of goods, easy-formation, the characteristics of easy-sintering.
Selection to bulk material:
1, the selection of raw material and testing program
Long nozzle and submersed nozzle are to be body material with electro-corundum, zirconia and carbon materials, add the refractory material that antioxidant and bond are made, its comprehensive utilization carbon materials difficulty is soaked into by slag, molten steel and corundum has the excellent specific property of high fire resistance, and the mechanism of the anti-slag etch of carbon materials is:
(1) increased infiltration angle between brick working face and the slag.
(2) produce CO gas in the brick, the pressure of this gas can stop the infiltration of slag.
(3) brick inside is stronger reducing condition, and the ferriferous oxide in the energy reducing slag improves slag viscosity, prevents that slag from infiltrating brick inside.
2, the raw material situation of selecting for use is as follows:
(1) electro-corundum is the primary raw material that long nozzle is produced.It is a skeleton in the slag line of brick and body split.Desire is produced high-quality, high-intensity long nozzle, must selective oxidation aluminium content high as far as possible (more than 99%), and body is close 〉=3.55g/cm
3, alpha-aluminium oxide is greater than 95% electro-corundum.With the long nozzle that the corundum that meets this kind requirement makes, has low melting loss speed, the product strength height.
(2) crystalline flake graphite
As the crystalline flake graphite of one of raw material of long nozzle, its key property such as fixed carbon content, ash composition, oxidation resistent susceptibility, granularity, shape and volatile matter directly influence the performance and the result of use of magnesia carbon brick.The graphite production long nozzle that meets certain specification requirement, the goods erosion resisting, spalling resistance, elevated temperature strength, oxidative resistance all can comprehensively be improved.
(3) resin: thermoplastics type's hard resin
The selection of bond is the key issue of this test, requires bond to have higher carbon residue rate, the good dispersion during granulation.After 1100 degrees centigrade of carbonizations, firm, continuous carbon web frame can be formed, after 220 degrees centigrade of oven dry, very high solidification intensity can be reached.
(4) antioxidant
For preventing long nozzle oxidation in use, must add a certain amount of antioxidant.Normally used antioxidant has Si, B
4The in use main and carbon reaction generation SiC of C, Si powder, final and aluminium oxide forms mullite, with certain volumetric expansion, makes the goods densification, thereby suppresses oxidation.
Antioxidant during test, we have also selected B simultaneously
4This is because at the surface of long nozzle, B for C
4C and oxygen generate B
2O
3, the sticking glass physical efficiency of this height is sealed porosity effectively, and oxidation reaction can not be expanded to profound level.
So silica flour, B have been adopted in this test
4C, and the anti-oxidation measure of adding jointly by a certain percentage of extraordinary antioxidant.
The performance of product sees the following form:
| | | Carbon- | |
| Al 2O 3(％) | ≥50 | ≥48 | ≥35 |
| C(％) | ≤24 | ≤25 | --- |
| Cold crushing strength (Mpa) | ≥30 | ≥20 | ≥20 |
| Strength at normal temperature (Mpa) | ≥10 | ≥7 | ≥5 |
| Bulk density (g/cm 3) | ≥2.5 | ≥2.35 | |
| The porosity (%) | ≤10.0 | ≤15.0 | ≤20.0 |
| Thermal shock resistance (inferior) | ＞7 | ||
Refractory quality supervision and inspection station, Liaoning Province survey report:
| Sample title: carbon-free nozzle brick | |
| Interventions Requested | Assay (mean value) |
| ZrO 2 ％ | 24.25 |
| Al 2O 3 ％ | 48.28 |
| SiO 2 ％ | 7.89 |
| MgO ％ | 3.22 |
| Bulk density g/cm 3 | 2.6 |
| Apparent porosity % | 14.6 |
| Cold crushing strength MPa | 45.8 |
| Strength at normal temperature MPa | 12.5 |
The thermosetting resin index:
| Viscosity (25 ℃ of Pas) | 3-7 |
| Moisture (%) | 2-6 |
| Carbon residue (%) | ≥40 |
| Solid content (%) | ≥75 |
| Free phenol (%) | 8-18 |
| PH value (25 ℃) | 6.8-7.6 |
Description of drawings: the present invention is described in detail below in conjunction with accompanying drawing.
Fig. 1 is technological process of production figure of the present invention.
Fig. 2 is a structural representation of the present invention.
The specific embodiment is as follows:
Embodiment 1: the manufacture craft at the carbon-free mouth of a river of a kind of continuous casting, and the mouth of a river comprises body, does not have carbon-coating at the compound one deck of the endoporus of body, concrete manufacture craft is as follows:
1. by weight a part batching, with ZrO
22 parts of Al
2O
33 parts of SiO
20.1 part of mix of 1 part of magnesium A Long Mg ALON;
2. above-mentioned each component is added thermosetting resin and carry out granulation;
3. carry out drying through the drying bed that flows at 70 ℃;
4. drying forms pug after vibratory sieve sieves;
5. choosing＜2mm pug after sieving, employing waits static pressure and body composite molding.
Embodiment 2: the manufacture craft at the carbon-free mouth of a river of a kind of continuous casting, and the mouth of a river comprises body, does not have carbon-coating at the compound one deck of the endoporus of body, concrete manufacture craft is as follows:
1. by weight a part batching, with ZrO
22.5 part Al
2O
33.5 part SiO
21.5 part 0.3 part of mix of magnesium A Long Mg ALON;
2. above-mentioned each component is added thermosetting resin and carry out granulation;
3. carry out drying through the drying bed that flows at 78 ℃;
4. drying forms pug after vibratory sieve sieves;
5. choosing＜2mm pug after sieving, employing waits static pressure and body composite molding.
Embodiment 3: the manufacture craft at the carbon-free mouth of a river of a kind of continuous casting, and the mouth of a river comprises body, does not have carbon-coating at the compound one deck of the endoporus of body, concrete manufacture craft is as follows:
1. by weight a part batching, with ZrO
23 parts of Al
2O
34 parts of SiO
20.5 part of mix of 2 parts of magnesium A Long Mg ALON;
2. above-mentioned each component is added thermosetting resin and carry out granulation;
3. carry out drying through the drying bed that flows at 85 ℃;
4. drying forms pug after vibratory sieve sieves;
5. choosing＜2mm pug after sieving, employing waits static pressure and body composite molding.
Carbon-free long nozzle is used for the protection cast that steel mill's continuous casting is produced.Long nozzle is the molten steel channel of molten steel from the ladle to the tundish, can completely cut off contacting of molten steel and air, prevents the secondary oxidation of molten steel and increases impurity such as [N] in the steel billet, [H].Submersed nozzle then is the passage of molten steel from the tundish to the crystallizer, and it can also make the molten steel steady flow except protecting molten steel not with air contacts, and does not roll up slag, guarantee mold liquid level steadily, reduced the internal flaw of steel billet.Indispensable functional refractory when long nozzle and submersed nozzle are steel mill's continuous casting production.
Carbon-free type does not toast the substitute products that long nozzle is conventional aluminium carbon long nozzle, and carbon-free submersed nozzle then is the substitute products of conventional aluminium zirconium carbon submersed nozzle.This developing direction is the new demand that China's steel and iron industry is excessively proposed refractory material to quality big country by output big country.Along with succeeding in developing of the carbon-free type mouth of a river, the quality of clean steel, particularly ultra-low-carbon steel that China produces will improve a lot.
Claims (1)
1, the manufacture craft at the carbon-free mouth of a river of a kind of continuous casting, the mouth of a river comprises body, it is characterized in that: do not have carbon-coating at the compound one deck of the endoporus of body, concrete manufacture craft is as follows:
1. by weight a part batching, with ZrO
22-3 part Al
2O
33-4 part SiO
21-2 part magnesium A Long Mg ALON 0.1-0.5 part mix;
2. above-mentioned each component is added thermosetting resin and carry out granulation;
3. carry out drying through the drying bed that flows at 70-85 ℃;
4. drying forms pug after vibratory sieve sieves;
5. choosing＜2mm pug after sieving, employing waits static pressure and body composite molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021448272A CN1176764C (en) | 2002-11-15 | 2002-11-15 | Manufacturing technology of continuous casting carbonless nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021448272A CN1176764C (en) | 2002-11-15 | 2002-11-15 | Manufacturing technology of continuous casting carbonless nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1410185A CN1410185A (en) | 2003-04-16 |
| CN1176764C true CN1176764C (en) | 2004-11-24 |
Family
ID=4750677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021448272A Expired - Fee Related CN1176764C (en) | 2002-11-15 | 2002-11-15 | Manufacturing technology of continuous casting carbonless nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1176764C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1311941C (en) * | 2005-09-30 | 2007-04-25 | 翟立猛 | Method for quick changing bottom inlet of intermediate ladle |
| CN102836994A (en) * | 2012-09-06 | 2012-12-26 | 上海宝明耐火材料有限公司 | Production method for submerged nozzle of sheet billet |
| CN112552046A (en) * | 2020-12-22 | 2021-03-26 | 江苏奥能耐火材料有限公司 | Low-expansion corrosion-resistant material added with cerium boride and preparation method thereof |
-
2002
- 2002-11-15 CN CNB021448272A patent/CN1176764C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1410185A (en) | 2003-04-16 |
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Free format text: FORMER OWNER: YANG HONG Owner name: DASHIQIAO RONGYUAN MAGNESIUM MINE CO.,LTD. Free format text: FORMER OWNER: XIE QIRONG Effective date: 20100427 |
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Free format text: CORRECT: ADDRESS; FROM: 115109 RONGYUAN COLLIERY, YONG AN TOWN, DASHIQIAO CITY, LIAONING PROVINCE TO: 115109 DASHIQIAO RONGYUAN MAGNESIUM MINE CO.,LTD., YONG AN TOWN, DASHIQIAO CITY, LIAONING |
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| TR01 | Transfer of patent right |
Effective date of registration: 20100427 Address after: Yongan town Dashiqiao city Liaoning province 115109 Dashiqiao Rong Yuanmei Mine Co. Ltd Patentee after: Dashiqiao Rongyuan Magnesite Co., Ltd. Address before: Yongan Town, Liaoning city of Dashiqiao Province Rong 115109 Yuanmei mine Patentee before: Xie Qirong Patentee before: Yang Hong |
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Granted publication date: 20041124 Termination date: 20121115 |