CN203474836U - RH refining furnace dip pipe for preventing nitrogen from being added into molten steel - Google Patents
RH refining furnace dip pipe for preventing nitrogen from being added into molten steel Download PDFInfo
- Publication number
- CN203474836U CN203474836U CN201320550403.4U CN201320550403U CN203474836U CN 203474836 U CN203474836 U CN 203474836U CN 201320550403 U CN201320550403 U CN 201320550403U CN 203474836 U CN203474836 U CN 203474836U
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- China
- Prior art keywords
- steel
- molten steel
- courage
- refining furnace
- soaking tub
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 120
- 239000010959 steel Substances 0.000 title claims abstract description 120
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 24
- 238000007670 refining Methods 0.000 title claims abstract description 24
- 229910052596 spinel Inorganic materials 0.000 claims abstract description 29
- 239000011029 spinel Substances 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 28
- 239000011449 brick Substances 0.000 claims abstract description 21
- 238000004873 anchoring Methods 0.000 claims abstract description 11
- 238000003466 welding Methods 0.000 claims abstract description 9
- 238000002791 soaking Methods 0.000 claims description 25
- 238000005266 casting Methods 0.000 claims description 23
- 238000012856 packing Methods 0.000 claims description 23
- 238000007789 sealing Methods 0.000 abstract description 6
- 238000005192 partition Methods 0.000 abstract 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract 1
- 229910052749 magnesium Inorganic materials 0.000 abstract 1
- 239000011777 magnesium Substances 0.000 abstract 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 12
- 229910052786 argon Inorganic materials 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 239000011819 refractory material Substances 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 3
- 229910052593 corundum Inorganic materials 0.000 description 3
- 239000010431 corundum Substances 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical group [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000000232 gallbladder Anatomy 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000013386 optimize process Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
The utility model discloses an RH refining furnace dip pipe for preventing nitrogen from being added into molten steel. The dip pipe comprises a steel container, wherein the outer wall of the steel container is coated with an outer refractory castable layer; the bottom of the steel container is coated with a bottom refractory castable layer, an inner wall liner of the steel container is provided with a magnesium spinel brick, the outer wall of the steel container is provided with a twisting sealing partition plate which is arranged along the circumference, and the twisting sealing partition plate is buried into the outer refractory castable layer. The RH refining furnace dip pipe provided by the utility model has the advantages that air is effectively prevented from entering molten steel along a gap in the outer surface of the steel container and a pouring material through the twisting sealing partition plate welded on the exterior of the steel container, and nitrogen is prevented from being added into the molten steel; the spinel brick is effectively fixed through pins welded on the exterior of the steel container, so that the slide is prevented, the half-penetrability welding is adopted, and a condition that the pin and an anchoring part are unsoldered after being heated is effectively prevented.
Description
Technical field
The utility model relates to a kind of soaking tub, relates in particular to a kind of RH refining furnace soaking tub of anti-molten steel nitrogen pick-up.
Background technology
In steel smelting procedure, furnace outer refining process to improving steel product quality, expand kind, reduce costs, optimize process for making aspect and have important effect, become the necessary link of process for making.RH vacuum refining furnace is exactly a kind of furnace outer refining process wherein, and the smelting of ultra low-carbon steel is had to higher cost performance, is promoted the use of widely.Wherein, soaking tub is the important component part of RH vacuum refining furnace.
When smelting molten steel, first soaking tub is immersed in pending ladle molten steel.When vacuum tank is evacuated, the barometric point of molten steel surface forces molten steel to flow in vacuum tank from soaking tub.Two soaking tubs that are communicated with vacuum tank, one is upcast, one is downtake.Because upcast is constantly blown into argon gas to molten steel, downtake has produced a higher static pressure difference relatively, makes molten steel enter and flow to downtake by vacuum tank bottom from upcast, and so constantly circulation repeatedly.Under vacuum state, the gas such as the argon gas in vacuum tank molten steel of flowing through, hydrogen, carbon monoxide is pumped in molten steel working cycle.Meanwhile, the molten steel entering in vacuum tank also carries out a series of metallurgical reaction, such as reaction between carbon and oxygen etc.; So circulating degasification refining is purified molten steel.The molten steel advantage of processing through RH is obvious: alloy does not react with slag substantially, and alloy directly adds among molten steel, and recovery rate is high; Molten steel energy Quick uniform mixes; Within alloying constituent can be controlled in narrow scope; Gas content is low, and inclusion is few, and Molten Steel Cleanliness is high; Can also carry out with top rifle the temperature adjustment of chemical heating, for continuous caster provides good fluidity, high purity, meets the molten steel of pouring temperature, be beneficial to the sequence casting that continuous casting is produced.The degree of depth of soaking tub lower end insertion molten steel surpasses half of soaking tub height, high-temperature molten steel conducts heat to steel courage by soaking tub ectonexine refractory materials, make steel courage expanded by heating, thereby interior outside refractory materials cracking and crack propagation are expanded, cause extraneous air surface along steel courage from crack to infiltrate molten steel, give molten steel nitrogen pick-up, affect steel quality.
Utility model content
The utility model, for the problems referred to above, has proposed the RH refining furnace soaking tub of anti-molten steel nitrogen pick-up a kind of simple in structure, safe and reliable.
The technical scheme that the utility model is taked is as follows:
A kind of RH refining furnace soaking tub of anti-molten steel nitrogen pick-up, comprise steel courage, the outer wall of described steel courage is coated with the outside refractory casting bed of material, the bottom of described steel courage is coated with the bottom refractory casting bed of material, the inwall of described steel courage is lined with magnesia-spinel brick, the outer wall of described steel courage is provided with along circumferential bent packing plate around the home, and described bent packing plate is imbedded in the refractory casting bed of material of outside.
The quantity of described bent packing plate is 2～3, and each bent packing plate is along the axial outer wall that is fixed on successively steel courage of steel courage.In order to guarantee sealing and intensity, described bent packing plate adopts the closely knit welding process in two sides to be welded on the outside of steel courage.Bent packing plate can form curved seal structure with outer ring mould material, can effectively prevent that air from entering molten steel along the gap between mould material and steel courage outside surface, thereby prevent molten steel nitrogen pick-up.
As preferably, the spacing distance of adjacent two blocks of bent packing plates is 100～150mm.Guarantee that certain interval can make the better effects if of sealing, can effectively prevent molten steel nitrogen pick-up.
As preferably, described bent packing plate is annular plate, and thickness is 10～15mm.Guarantee certain thickness, can make to guarantee the intensity of bent packing plate.
As preferably, described magnesia-spinel brick is Chrome free refractories.Concrete material forms can adopt prior art.
The inwall of described steel courage has some pins along circumferential uniform welding, and described magnesia-spinel brick is with the stopper slot corresponding with pin position.The cooperation of pin and stopper slot can effectively lock internal layer magnesia-spinel brick in the position of steel courage inside, prevents that internal layer magnesia-spinel brick from gliding and a minute phenomenon appears laterally splitting in upper and lower magnesia-spinel brick.
As preferably, described pin is partly to penetrate the straight rod being welded on steel courage, and straight rod outside diameter is 10～20mm.
As preferably, the bottom of described steel courage is imbedded in the refractory casting bed of material of bottom, and the distance range between the bottom of steel courage and the bottom surface of the bottom refractory casting bed of material is 80～150mm.Steel courage is not directly contacted with molten steel.
As preferably, the altitude range of the described bottom refractory casting bed of material is 100mm～300mm.
The outer wall of described steel courage is fixed with anchoring piece, and described anchoring piece is partly to penetrate the fork configuration being welded on steel courage.This can effectively prevent the be heated generation of sealing-off phenomenon of anchoring piece.Fork configuration can be also Y shape for V-arrangement, by this structure, can make steel courage and refractory castable closely be fixed together.
As preferably, between the inwall of described steel courage and magnesia-spinel brick, be filled with corundum-spinel castable.The high warm nature of corundum castable is good, intensity is high, but because Young's modulus is excessive, cause hot anti-seismic performance poor, easily peel off, and spinel fusing point is high, hardness is large, and thermal expansivity is little, chemical stabilization, spinel is introduced after corundum castable, can significantly improve thermal shock resistance and the high-temperature behavior of corundum castable.With regard to corundum-spinel castable, can adopt existing formula itself.
The beneficial effects of the utility model are: the bent packing plate of the outside weldings by steel courage, can effectively prevent that air from entering molten steel along the gap of steel courage outside surface and mould material, and prevent molten steel nitrogen pick-up; By the pin of steel courage interior welds, effectively fixing magnesia-spinel brick, anti-skidding; Adopt half penetrance welding, can effectively prevent pin and anchoring piece be heated after sealing-off.
Accompanying drawing explanation
Fig. 1 is the structure sectional view of the RH refining furnace soaking tub of the anti-molten steel nitrogen pick-up of the utility model.
In figure, each Reference numeral is:
1. steel courage, 2. bent packing plate, 3. anchoring piece, 4. pin, 5. magnesia-spinel brick, 6. the outside refractory casting bed of material, 7. Argon pipe, 8. the bottom refractory casting bed of material, 9. stopper slot, 10. corundum-spinel castable ，11. branch.
Embodiment
As shown in Figure 1, a kind of RH refining furnace soaking tub of anti-molten steel nitrogen pick-up, comprise steel courage 1, the outer wall of steel courage 1 is coated with the outside refractory casting bed of material 6, the bottom of steel courage is coated with the bottom refractory casting bed of material 8, the inwall of steel courage 1 is lined with the magnesia-spinel brick 5 consisting of Chrome free refractories, between the inwall of steel courage 1 and magnesia-spinel brick 5, be filled with corundum-spinel castable 10, steel courage 1 is provided with Argon pipe 7, one end of Argon pipe 7 penetrates respectively corundum-spinel castable 10, magnesia-spinel brick 5 is communicated to the inner chamber of soaking tub, the other end is connected with argon gas device, the outer wall of steel courage 1 is provided with the circumferential bent packing plate 2 around the home in two edges, bent packing plate 2 is imbedded in the outside refractory casting bed of material 6.
The inwall of steel courage 1 has some pins 4 along circumferential uniform welding, and pin 4 is partly to penetrate to be welded on the straight rod that steel courage 1 top external diameter is 15mm.Magnesia-spinel brick 5 is with the stopper slot 9 corresponding with pin 4 positions.The cooperation of pin 4 and stopper slot 9 can effectively lock internal layer magnesia-spinel brick in the position of steel courage inside, prevents that internal layer magnesia-spinel brick from gliding and a minute phenomenon appears laterally splitting in upper and lower magnesia-spinel brick.
The bottom of steel courage 1 is imbedded in the bottom refractory casting bed of material 8, and the distance between the bottom of steel courage and the bottom surface of the bottom refractory casting bed of material is L1, and L1 is 115mm, and the height of the bottom refractory casting bed of material 8 is L2, and L2 is 150mm.The bottom refractory casting bed of material is imbedded in the bottom of steel courage can guarantee that steel courage does not directly contact with molten steel.
Steel gall bladder wall is fixed with anchoring piece 3, and anchoring piece 3 is partly to penetrate the v-shaped structure being welded on steel courage 1, and this v-shaped structure You Liangge branch 11 forms, the straight rod that branch 11 is 10mm for diameter.Partly penetrate welding and can effectively prevent the anchoring piece generation of sealing-off phenomenon of being heated, and be that v-shaped structure can make steel courage 1 and outside refractory casting layer 6 be closely linked.
Claims (10)
1. the RH refining furnace soaking tub of an anti-molten steel nitrogen pick-up, comprise steel courage, the outer wall of described steel courage is coated with the outside refractory casting bed of material, the bottom of described steel courage is coated with the bottom refractory casting bed of material, the inwall of described steel courage is lined with magnesia-spinel brick, it is characterized in that, the outer wall of described steel courage is provided with along circumferential bent packing plate around the home, and described bent packing plate is imbedded in the refractory casting bed of material of outside.
2. the RH refining furnace soaking tub of anti-molten steel nitrogen pick-up as claimed in claim 1, is characterized in that, the quantity of described bent packing plate is 2～3, and each bent packing plate is along the axial outer wall that is fixed on successively steel courage of steel courage.
3. the RH refining furnace soaking tub of anti-molten steel nitrogen pick-up as claimed in claim 2, is characterized in that, the spacing distance of adjacent two blocks of bent packing plates is 100～150mm.
4. the RH refining furnace soaking tub of anti-molten steel nitrogen pick-up as claimed in claim 3, is characterized in that, described bent packing plate is annular plate, and thickness is 10～15mm.
5. the RH refining furnace soaking tub of anti-molten steel nitrogen pick-up as claimed in claim 1, is characterized in that, the inwall of described steel courage has some pins along circumferential uniform welding, and described magnesia-spinel brick is with the stopper slot corresponding with pin position.
6. the RH refining furnace soaking tub of anti-molten steel nitrogen pick-up as claimed in claim 5, is characterized in that, described pin is partly to penetrate the straight rod being welded on steel courage, and straight rod outside diameter is 10～20mm.
7. the RH refining furnace soaking tub of anti-molten steel nitrogen pick-up as claimed in claim 1, is characterized in that, the bottom of described steel courage is imbedded in the refractory casting bed of material of bottom, and the distance range between the bottom of steel courage and the bottom surface of the bottom refractory casting bed of material is 80～150mm.
8. the RH refining furnace soaking tub of anti-molten steel nitrogen pick-up as claimed in claim 1, is characterized in that, the altitude range of the described bottom refractory casting bed of material is 100mm～300mm.
9. the RH refining furnace soaking tub of anti-molten steel nitrogen pick-up as claimed in claim 1, is characterized in that, the outer wall of described steel courage is fixed with anchoring piece, and described anchoring piece is partly to penetrate the fork configuration being welded on steel courage.
10. the RH refining furnace soaking tub of anti-molten steel nitrogen pick-up as claimed in claim 1, is characterized in that, between the inwall of described steel courage and magnesia-spinel brick, is filled with corundum-spinel castable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320550403.4U CN203474836U (en) | 2013-09-05 | 2013-09-05 | RH refining furnace dip pipe for preventing nitrogen from being added into molten steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320550403.4U CN203474836U (en) | 2013-09-05 | 2013-09-05 | RH refining furnace dip pipe for preventing nitrogen from being added into molten steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203474836U true CN203474836U (en) | 2014-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320550403.4U Expired - Fee Related CN203474836U (en) | 2013-09-05 | 2013-09-05 | RH refining furnace dip pipe for preventing nitrogen from being added into molten steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203474836U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103937932A (en) * | 2014-05-09 | 2014-07-23 | 浙江自立股份有限公司 | Low thermal-conductivity RH refining furnace dip pipe |
| CN104962697A (en) * | 2015-05-25 | 2015-10-07 | 丹东播磨耐火材料有限公司 | RH vacuum refining furnace lifting pipe |
-
2013
- 2013-09-05 CN CN201320550403.4U patent/CN203474836U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103937932A (en) * | 2014-05-09 | 2014-07-23 | 浙江自立股份有限公司 | Low thermal-conductivity RH refining furnace dip pipe |
| CN103937932B (en) * | 2014-05-09 | 2015-12-02 | 浙江自立股份有限公司 | A kind of low heat-conducting type RH refining furnace soaking tub |
| CN104962697A (en) * | 2015-05-25 | 2015-10-07 | 丹东播磨耐火材料有限公司 | RH vacuum refining furnace lifting pipe |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 312300 338 Bai Xie Road, Bai Guan Street, Shangyu City, Shaoxing, Zhejiang Patentee after: Zhejiang independent Cmi Holdings Ltd. Address before: 312300 338 Bai Xie Road, Bai Guan Street, Shangyu City, Shaoxing, Zhejiang Patentee before: ZHEJIANG ZILI Corp.,Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190426 Address after: 312300 Zhejiang Shaoxing Hangzhou Bay Shangyu economic and Technological Development Zone East two District Ju Xian two Road 9 Patentee after: ZHEJIANG ZILI HIGH TEMPERATURE TECHNOLOGY Co.,Ltd. Address before: 312300 338 Bai Xie Road, Bai Guan Street, Shangyu City, Shaoxing, Zhejiang Patentee before: Zhejiang independent Cmi Holdings Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 312300 Zhejiang city of Shaoxing province Hangzhou Bay Juxian two East District of Shangyu economic and Technological Development Zone two Road No. 9 Patentee after: Zhejiang Zili High Temperature Technology Co.,Ltd. Address before: 312300 Zhejiang city of Shaoxing province Hangzhou Bay Juxian two East District of Shangyu economic and Technological Development Zone two Road No. 9 Patentee before: ZHEJIANG ZILI HIGH TEMPERATURE TECHNOLOGY Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140312 |