CN104032097B - A kind of insert pipe for vacuum circulation degassing furnaces and preparation method thereof - Google Patents

A kind of insert pipe for vacuum circulation degassing furnaces and preparation method thereof Download PDF

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CN104032097B
CN104032097B CN201410311832.5A CN201410311832A CN104032097B CN 104032097 B CN104032097 B CN 104032097B CN 201410311832 A CN201410311832 A CN 201410311832A CN 104032097 B CN104032097 B CN 104032097B
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upper layer
pouring layer
lower pouring
mould material
circulation degassing
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CN104032097A (en
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李龙
杨大刚
陈永
张强
曾建华
王建
戈文荪
李扬洲
杨森祥
童贤强
李平凡
杜利华
王军
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Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd
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Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Abstract

The present invention relates to a kind of insert pipe for vacuum circulation degassing furnaces and preparation method thereof, belong to the external refining field of metallurgical production.The invention provides a kind of insert pipe for vacuum circulation degassing furnaces, the pouring layer that tubular stinger comprises tubular steel structure, builds the refractory brick on steel construction inwall by laying bricks or stones and be formed on steel construction outer wall, pouring layer comprises the lower pouring layer and upper layer that contact with each other, wherein, upper layer is when carrying out vacuum circulation degassing refining and slag contacts, lower pouring layer is when carrying out vacuum circulation degassing refining and steel contacts, and lower pouring layer external diameter is less than upper layer, forms T-type structure; Further, ZrO is comprised in the composition of lower pouring layer mould material 2and TiO 2, wherein, ZrO 2add-on account for the 2-5% of lower pouring layer mould material gross weight, TiO 2add-on account for the 2-8% of lower pouring layer mould material gross weight.The present invention adopts lower pouring layer external diameter to be less than and upper layer, forms T-type structure, the dry slag of basically eliminate and steel contacts mould material, reduces scarfing cinder amount.

Description

A kind of insert pipe for vacuum circulation degassing furnaces and preparation method thereof
Technical field
The present invention relates to a kind of insert pipe for vacuum circulation degassing furnaces and preparation method thereof, belong to the external refining field of metallurgical production.
Background technology
Nineteen fifty-seven Thyssen Iron And Steel Company invention vacuum circulation degassing-RH method, the seventies subsequently and the eighties, Japan successively develops RH-OB method, RH-KTB method and RH-PB method, constantly improves the refining function of RH.Along with the purity requirements of market to steel is more and more higher, simultaneously to high-quality steel demand increase, domestic and international most steel mill is all configured with RH a refining unit.In refining process, the outer mould material of RH tubular stinger is owing to bearing the washing away of high-temperature molten steel, the erosion of slag and the thermal shocking of rapid heat cycle, easily causes mould material generation melting loss and peels off.And after RH process terminates, slag drips from the top down along mould material, along with temperature reduces, a part of slag just sticks to mould material surface, and must carry out scarfing cinder could spray repair.Like this, on the one hand increased the scarfing cinder time, the more important thing is that tubular stinger temperature loss is large, directly affect spray repair effect, cause the work-ing life of RH tubular stinger and production efficiency on the low side.
Patent CN102503449A in order to solve existing mould material anti-scour property and heat-shock resistance poor, the problem that resistance to material dross is serious, propose a kind of compound and the additive that comprise aggregate and substrate material composition, containing weight percent in described substrate material is 7.5-23.5%SiC.Patent CN101475385 is different from the corundum pouring material used at present, and the mould material providing a kind of electric fused zirconium corundum matter, for tubular stinger, effectively improves anti-slag and invades and permeate, but there is the problem of high expensive.Patent CN201110441219.1 introduces compact alumina, and develop the RH vacuum oven tubular stinger corundum pouring material that a kind of non-cement combines, work-ing life, cost increased to some extent than existing mould material at about 80 times.
In addition, in RH treating processes, easily occur to corrode or dry slag with the mould material of slag contacts, the method of current minimizing dry slag mainly contains 1, coating process (patent CN200610018622), specifically adopt coating that slag is not directly contacted with mould material, reach the object reducing dry slag, but in treating processes, because the erosion of slag to coating limits its ability suppressing dry slag.2, residue adjustment process (patent CN101307375) carries out slag modification in the RH process later stage, reduces the viscosity of slag, thus slag is not easily sticked on tubular stinger, but the erosion of mould material and ladle liner can be made to aggravate.Mechanical doctor (patent CN200620098887.3, patent CN200820076256.0 etc.) is mainly adopted to the clinker removal method of dry slag on tubular stinger, but owing to there is cold steel in dry slag, mechanical removal is easy to mould material is damaged, and the treatment time is long, temperature drop is large, affect spray repair effect, greatly reduce work-ing life.
Summary of the invention
The present invention is directed to above-mentioned defect, a kind of insert pipe for vacuum circulation degassing furnaces is provided, gained tubular stinger is T-type structure, the dry slag of T-type structure basically eliminate and steel contacts mould material (lower pouring layer), dry slag is few, anti-erosion, greatly shortens the scarfing cinder time, reduce temperature drop, improve spray repair effect and long service life; In addition, ZrO is comprised in the composition of lower pouring layer of the present invention 2and TiO 2; Utilize ZrO 2and TiO 2fine powder can improve hot strength and the thermal shock resistance of lower pouring layer.
Technical scheme of the present invention:
The invention provides a kind of insert pipe for vacuum circulation degassing furnaces, the pouring layer that described tubular stinger comprises tubular steel structure, builds the refractory brick on described steel construction inwall by laying bricks or stones and be formed on steel construction outer wall, described pouring layer comprises the lower pouring layer and upper layer that contact with each other, wherein, described upper layer is when carrying out vacuum circulation degassing refining and slag contacts, described lower pouring layer is when carrying out vacuum circulation degassing refining and steel contacts, lower pouring layer external diameter is less than the external diameter of upper layer, thus forms T-type structure; Further, ZrO is comprised in the composition of described lower pouring layer mould material 2and TiO 2, ZrO 2add-on account for the 2-5% of lower pouring layer mould material gross weight, TiO 2add-on account for the 2-8% of lower pouring layer mould material gross weight.
Preferably, lower pouring layer external diameter is less than upper layer external diameter 5-20cm, preferred 5-10cm.
Preferably, ZrO 2particle diameter be 20 μm ~ 90 μm, TiO 2particle diameter is 20 μm ~ 70 μm.
Preferably, in above-mentioned insert pipe for vacuum circulation degassing furnaces, in described upper layer mould material composition, comprise ZrB 2and zircon; Wherein, ZrB 2add-on account for the 2-5% of upper layer mould material gross weight, the add-on of zircon accounts for the 3-8% of upper layer mould material gross weight.
Preferably, ZrB 2particle diameter be 20 μm ~ 90 μm, zircon particle diameter is 20 μm ~ 90 μm.
Further, described lower pouring layer mould material composition and parts by weight thereof are: 5mm ~ 10mm white fused alumina 16 ~ 20 parts, 3mm ~ 5mm white fused alumina 20 ~ 25 parts, 0mm ~ 3mm white fused alumina 23 ~ 28 parts, be less than 0.074mm white fused alumina fine powder 20 ~ 25 parts, Alpha-alumina micro mist 4 ~ 8 parts, silicon powder 2 ~ 4 parts, 1.0 ~ 2.0 parts, tackiness agent, ZrO 22 ~ 5 parts, TiO 22 ~ 8 parts, water reducer 0.1-0.3 part (being preferably 0.2), Stainless Steel Fibre 1.0 ~ 1.5 parts;
Described upper layer mould material composition is: 5mm ~ 8mm white fused alumina 17 ~ 20 parts, 3mm ~ 5mm white fused alumina 20 ~ 25 parts, 0mm ~ 3mm white fused alumina 20 ~ 28 parts, be less than 0.074mm white fused alumina fine powder 18 ~ 25 parts, Alpha-alumina micro mist 4 ~ 8 parts, silicon powder 2.0 ~ 4.0 parts, 1.5 ~ 2.0 parts, tackiness agent, ZrB 22.0 ~ 5.0 parts, zircon 3.0 ~ 8.0 parts, water reducer 0.1-0.3 part, Stainless Steel Fibre 1.0 ~ 1.5 parts.
In the present invention, water reducer is at least one in poly-phosphate, poly carboxylic acid or dispersed alumina series high-efficiency water-reducing agent; Tackiness agent is aluminous cement or hydrated aluminum oxide micro mist.
Present invention also offers the preparation method of above-mentioned insert pipe for vacuum circulation degassing furnaces, comprise step:
Form tubular steel structure, described steel construction inwall is built by laying bricks or stones refractory brick, form the upper layer and lower pouring layer that contact with each other at steel construction outer wall upper; Wherein, described upper layer is when carrying out vacuum circulation degassing refining and slag contacts, and described lower pouring layer is when carrying out vacuum circulation degassing refining and steel contacts, and lower pouring layer external diameter is less than upper layer, thus forms T-type structure.
Further, in the preparation method of above-mentioned insert pipe for vacuum circulation degassing furnaces, the step of the lower pouring layer that described formation contacts with each other and upper layer is:
1) prepare burden according to the composition of upper layer and lower pouring layer, formed and be used for the first compound of lower pouring layer and the second compound for upper layer;
2) carried out to the first compound first time mixing, then add account for the first compound weight 6 ~ 7% water after to carry out second time mixing; Carried out to the second compound mixing first time, then add account for the second compound weight 6 ~ 7% water after to carry out second time mixing;
3) T-shaped die casting is used to form lower pouring layer and upper layer, and vibration while cast.
Preferably, first time is mixing is 5-10min with the second time mixing time.
A kind of vacuum refining furnace, comprise for the vacuum tank of molten steel metallurgical reaction, for providing the vacuum system of power to described vacuum tank, and the insert pipe for vacuum circulation degassing furnaces be arranged on below described vacuum tank, described insert pipe for vacuum circulation degassing furnaces is the T-shaped tubular stinger of gained of the present invention.
Beneficial effect of the present invention:
In mould material in prior art in vacuum degassing furnace tubular stinger, additive is substantially close, and shape is cylindrical.And employing of the present invention and steel contacts pouring layer (lower pouring layer) external diameter are less than and slag contacts pouring layer (upper layer), thus form T-type structure tubular stinger, the dry slag of T-type structure basically eliminate and steel contacts mould material, reduce scarfing cinder amount, greatly shorten the scarfing cinder time, reduce temperature drop, improve spray repair effect.In addition, the present invention adds ZrB in the mould material of upper layer 2with zircon fine powder, utilize ZrB 2(zirconium boride 99.5004323A8ure) and zircon fine powder improve hot strength and the slag resistance of slag lining mould material; ZrO is comprised in the composition of lower pouring layer 2and TiO 2; Utilize ZrO 2and TiO 2fine powder can improve hot strength and the thermal shock resistance of lower pouring layer.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment of the present invention vacuum degassing furnace tubular stinger.Wherein, 1-flange, 2-steel construction, 3-ram's horn, 4-ram's horn, 5-Mg-Cr brick, 6-and slag contacts pouring layer, 7-and steel contacts pouring layer.
Embodiment
The invention provides a kind of insert pipe for vacuum circulation degassing furnaces, the pouring layer that described tubular stinger comprises tubular steel structure, builds the refractory brick on described steel construction inwall by laying bricks or stones and be formed on steel construction outer wall, described pouring layer comprises the lower pouring layer and upper layer that contact with each other, wherein, described upper layer is when carrying out vacuum circulation degassing refining and slag contacts, described lower pouring layer is when carrying out vacuum circulation degassing refining and steel contacts, lower pouring layer external diameter is less than upper layer, thus forms T-type structure; Further, ZrO is comprised in the composition of described lower pouring layer mould material 2and TiO 2; ZrO 2add-on account for the 2-5% of lower pouring layer mould material gross weight, TiO 2add-on account for the 2-8% of lower pouring layer mould material gross weight.
ZrO 2particle diameter be 20 μm ~ 90 μm, TiO 2particle diameter is 20 μm ~ 70 μm.The meticulous powder of granularity is difficult to economic acquisition, and granularity is excessive, and it is limited to the raising of intensity and anti-seismic performance.
The dry slag of the T-type structure basically eliminate that the present invention is formed and steel contacts mould material, reduces scarfing cinder amount, greatly shortens the scarfing cinder time, reduces temperature drop, improves spray repair effect; Utilize ZrO 2and TiO 2fine powder can improve hot strength and the thermal shock resistance of lower pouring layer.
Preferably, in above-mentioned insert pipe for vacuum circulation degassing furnaces, in described upper layer mould material composition, comprise ZrB 2and zircon; Utilize ZrB 2(zirconium boride 99.5004323A8ure) promotes the sintering of mould material matrix, thus improves hot strength; Zircon fine powder and the CaO in slag react the infiltration and the melting loss that form high-melting-point phase CaZrO3 and suppress slag, meanwhile ZrB 2have good slag resistance, both combine the slag resistance improving mould material.In the present invention, the existing mould material preparing insert pipe for vacuum circulation degassing furnaces all can use, and just in the mould material of lower pouring layer, adds ZrB 2upper layer is formed with zircon.
Preferably, ZrB 2particle diameter be 20 μm ~ 90 μm, zircon powder footpath is 20 μm ~ 90 μm; The meticulous powder of granularity is difficult to economic acquisition, granularity excessive its to intensity and erosion-resistant raising limited.
In the present invention, upper layer mould material is add ZrB in the mould material used in prior art 2and zircon, lower pouring layer mould material is add ZrO in the mould material used in prior art 2and TiO 2, be not limited in the mould material that the pouring layer up and down in embodiment uses.
Further, described lower pouring layer mould material composition and parts by weight thereof are: 5mm ~ 10mm white fused alumina 16 ~ 20 parts, 3mm ~ 5mm white fused alumina 20 ~ 25 parts, 0mm ~ 3mm white fused alumina 23 ~ 28 parts, be less than 0.074mm white fused alumina fine powder 20 ~ 25 parts, Alpha-alumina micro mist 4 ~ 8 parts, silicon powder 2 ~ 4 parts, 1.0 ~ 2.0 parts, tackiness agent, ZrO 22 ~ 5 parts, TiO 22 ~ 8 parts, water reducer 0.1-0.3 part (being preferably 0.2), Stainless Steel Fibre 1.0 ~ 1.5 parts;
Described upper layer mould material composition is: 5mm ~ 8mm white fused alumina 17 ~ 20 parts, 3mm ~ 5mm white fused alumina 20 ~ 25 parts, 0mm ~ 3mm white fused alumina 20 ~ 28 parts, be less than 0.074mm white fused alumina fine powder 18 ~ 25 parts, Alpha-alumina micro mist 4 ~ 8 parts, silicon powder 2.0 ~ 4.0 parts, 1.5 ~ 2.0 parts, tackiness agent, ZrB 22.0 ~ 5.0 parts, zircon 3.0 ~ 8.0 parts, water reducer 0.1-0.3 part, Stainless Steel Fibre 1.0 ~ 1.5 parts.
Present invention also offers the preparation method of above-mentioned insert pipe for vacuum circulation degassing furnaces, comprise step:
Form tubular steel structure, described steel construction inwall is built by laying bricks or stones refractory brick, form the upper layer and lower pouring layer that contact with each other at steel construction outer wall upper; Wherein, step, described upper layer when carrying out vacuum circulation degassing refining not with steel contacts (with slag contacts), described lower pouring layer is when carrying out vacuum circulation degassing refining and steel contacts, lower pouring layer external diameter is less than upper layer, thus forms T-type structure.
Further, in the preparation method of above-mentioned insert pipe for vacuum circulation degassing furnaces, the step of the lower pouring layer that described formation contacts with each other and upper layer is:
1) prepare burden according to the composition of upper layer and lower pouring layer, formed and be used for the first compound of lower pouring layer and the second compound for upper layer;
2) carried out to the first compound first time mixing, then add account for the first compound weight 6 ~ 7% water after to carry out second time mixing; Carried out to the second compound mixing first time, then add account for the second compound weight 6 ~ 7% water after to carry out second time mixing;
3) T-shaped die casting is used to form lower pouring layer and upper layer, and vibration while cast.
Below in conjunction with embodiment, the specific embodiment of the present invention is further described, does not therefore limit the present invention among described scope of embodiments.
In the present invention, conveniently connect and keep in repair, the top of tubular structure can be provided with flange 1, in addition in order to the cast bed of material can be made to be combined securely with tubular steel structure, the outer wall of tubular steel structure can be provided with the ram's horn 3,4 along different directions, ram's horn material can be 20g reinforcing bar, and length can be 60-70mm; As shown in Figure 1.
This embodiment tubular stinger structure as shown in Figure 1, comprising: steel construction 2, flange 1, ram's horn 3,4, Mg-Cr brick 5, upper layer (with the pouring layer of slag contacts) 6, lower pouring layer (with the pouring layer of steel contacts) 7.
The material of tubular stinger steel construction 1 adopts 20g reinforcing bar, thickness 25 ~ 30mm.Adopt ram's horn 3 with slag contacts position, material is 20g reinforcing bar, and long 60 ~ 70mm, is distributed in steel structure surface by certain angle; Ram's horn 3,4 is adopted, by certain angle mixed distribution at steel structure surface with steel contacts position; Magnesia chrome brick 5 is built by laying bricks or stones on steel construction inside, magnesia chrome brick Cr 2o 3content 24wt% ~ 30wt%; For base material is the note layer that aluminum oxide waters on steel construction outer wall.
Pouring layer take aluminum oxide as base material, concrete, and pouring layer is by following component batching:
(1) form with the weight part of steel contacts mould material (lower pouring layer 7)
5mm ~ 10mm white fused alumina accounts for 16 ~ 20 parts, and 3mm ~ 5mm white fused alumina accounts for 20 ~ 25 parts, and 0mm ~ 3mm white fused alumina accounts for 23 ~ 28 parts, be less than 0.074mm white fused alumina fine powder and account for 20 ~ 25 parts, Alpha-alumina micro mist accounts for 4 ~ 8 parts, and silicon powder accounts for 2 ~ 4 parts, 70 trade mark aluminous cements account for 1.0 ~ 2.0 parts, ZrO 2fine powder accounts for 2.0 ~ 5.0 parts, TiO 2fine powder accounts for 2.0 ~ 8.0 parts, additional water reducer 0.1 ~ 0.3 part, Stainless Steel Fibre 1.0 ~ 1.5 parts;
(2) form with the weight part of the mould material (upper layer 6) of slag contacts
5mm ~ 8mm white fused alumina accounts for 17 ~ 20 parts, 3mm ~ 5mm white fused alumina accounts for 20 ~ 25 parts, 0mm ~ 3mm white fused alumina accounts for 20 ~ 28 parts, be less than 0.074mm white fused alumina fine powder and account for 18 ~ 25 parts, Alpha-alumina micro mist accounts for 4 ~ 8 parts, silicon powder accounts for 2.0 ~ 4.0 parts, and 70 trade mark aluminous cements account for 1.5 ~ 2.0 parts, ZrB 2fine powder accounts for 2.0 ~ 5.0 parts, and zircon fine powder accounts for 3.0 ~ 8.0 parts, additional water reducer 0.1 ~ 0.3 part, Stainless Steel Fibre 1.0 ~ 1.5 parts;
Wherein white fused alumina chemical composition meets (wt%): Al 2o 3>=98, SiO 2< 0.5, FeO < 0.5; ZrB 2fine powder particle diameter is between 20 μm ~ 90 μm, and zircon fine powder particle diameter is between 20 μm ~ 90 μm.
Before cast, prepare burden respectively by above-mentioned (1) with (2), then take appropriate batching (1) and batching (2) successively, mix 5 ~ 10min respectively, adds the mixed 5 ~ 10min of water of 6 ~ 7wt%.During cast, first pour in T-shaped mould by mixed batching (1), pour mixed batching (2) into after vibration 30s, 2min ~ 3min is shaping in vibration; The demoulding after 24h, maintenance 24h ~ 48h, toasts 24h online and namely obtains T-type structure tubular stinger after drying.The slag of dry slag amount and slag lining that the tubular stinger of this structure can reduce mould material is invaded, and greatly shortens the scarfing cinder time, and improve spray repair effect, the work-ing life of tubular stinger reaches more than 90 times.
In addition, can adjust the mould material composition in above-described embodiment and grain size distribution.Such as, white fused alumina also can use compact alumina powder to replace, and aluminous cement, as bonding agent, also can adopt hydrated aluminum oxide micro mist to substitute.
Although describe the present invention in conjunction with the embodiments, it will be apparent to those skilled in the art that when not departing from the spirit and scope of claim above, various amendment can be carried out to above-described embodiment.

Claims (10)

1. an insert pipe for vacuum circulation degassing furnaces, the pouring layer that described tubular stinger comprises tubular steel structure, builds the refractory brick on described steel construction inwall by laying bricks or stones and be formed on steel construction outer wall, described pouring layer comprises the upper layer and lower pouring layer that contact with each other, it is characterized in that, described upper layer is when carrying out vacuum circulation degassing refining and slag contacts, described lower pouring layer is when carrying out vacuum circulation degassing refining and steel contacts, the external diameter of lower pouring layer is less than the external diameter of upper layer, thus forms T-type structure; Further, ZrO is comprised in the composition of described lower pouring layer mould material 2and TiO 2, wherein, ZrO 2add-on account for the 2-5% of lower pouring layer mould material gross weight, TiO 2add-on account for the 2-8% of lower pouring layer mould material gross weight.
2. insert pipe for vacuum circulation degassing furnaces according to claim 1, is characterized in that, lower pouring layer external diameter is less than upper layer external diameter 5-20cm.
3. insert pipe for vacuum circulation degassing furnaces according to claim 1 and 2, is characterized in that, ZrO 2particle diameter be 20 μm ~ 90 μm, TiO 2particle diameter is 20 μm ~ 70 μm.
4. insert pipe for vacuum circulation degassing furnaces according to claim 1 and 2, is characterized in that, comprises ZrB in described upper layer mould material composition 2and zircon, wherein, ZrB 2add-on account for the 2-5% of upper layer mould material gross weight, the add-on of zircon accounts for the 3-8% of upper layer mould material gross weight.
5. insert pipe for vacuum circulation degassing furnaces according to claim 3, is characterized in that, comprises ZrB in described upper layer mould material composition 2and zircon, wherein, ZrB 2add-on account for the 2-5% of upper layer mould material gross weight, the add-on of zircon accounts for the 3-8% of upper layer mould material gross weight.
6. the preparation method of the insert pipe for vacuum circulation degassing furnaces described in any one of Claims 1 to 5, comprises step:
Form tubular steel structure;
Described steel construction inwall builds refractory brick by laying bricks or stones;
The upper layer and lower pouring layer that contact with each other is formed at steel construction outer wall upper;
It is characterized in that, described upper layer is when carrying out vacuum circulation degassing refining and slag contacts, and described lower pouring layer is when carrying out vacuum circulation degassing refining and steel contacts, and lower pouring layer external diameter is less than upper layer external diameter, thus forms T-type structure.
7. the preparation method of insert pipe for vacuum circulation degassing furnaces according to claim 6, is characterized in that, the step of the lower pouring layer that described formation contacts with each other and upper layer is:
1) prepare burden according to the mould material composition of upper layer and lower pouring layer, formed and be used for the first compound of lower pouring layer and the second compound for upper layer;
2) carried out to the first compound first time mixing, then add account for the first compound weight 6 ~ 7% water after to carry out second time mixing; Carried out to the second compound mixing first time, then add account for the second compound weight 6 ~ 7% water after to carry out second time mixing;
3) T-shaped die casting is used to form lower pouring layer and upper layer, and vibration while cast.
8. the preparation method of insert pipe for vacuum circulation degassing furnaces according to claim 7, is characterized in that, first time is mixing and the mixing time is 5-10min for the second time.
9. vacuum refining furnace, comprise for the vacuum tank of molten steel metallurgical reaction, for providing the vacuum system of power to described vacuum tank, and the tubular stinger be arranged on below described vacuum tank, it is characterized in that, described tubular stinger is the insert pipe for vacuum circulation degassing furnaces described in any one of Claims 1 to 5.
10. vacuum refining furnace, comprise for the vacuum tank of molten steel metallurgical reaction, for providing the vacuum system of power to described vacuum tank, and the tubular stinger be arranged on below described vacuum tank, it is characterized in that, the insert pipe for vacuum circulation degassing furnaces that described tubular stinger obtains for the preparation method described in any one of claim 6 ~ 8.
CN201410311832.5A 2014-07-02 2014-07-02 A kind of insert pipe for vacuum circulation degassing furnaces and preparation method thereof Active CN104032097B (en)

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CN104762443A (en) * 2015-01-13 2015-07-08 上海宝明耐火材料有限公司 Argon blowing gun for molten steel refining

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CN103045807A (en) * 2011-10-12 2013-04-17 攀钢集团攀枝花钢铁研究院有限公司 Vacuum circulation degassing insert tube
CN103114179A (en) * 2013-03-06 2013-05-22 攀钢集团攀枝花钢铁研究院有限公司 Insertion tube of vacuum cycle degassing refining furnace and preparation method thereof
CN103114178A (en) * 2013-03-06 2013-05-22 攀钢集团攀枝花钢铁研究院有限公司 RH refining furnace, insertion tube thereof and preparation method

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CN103045807A (en) * 2011-10-12 2013-04-17 攀钢集团攀枝花钢铁研究院有限公司 Vacuum circulation degassing insert tube
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