CN104117665A - Submerged nozzle for special-shaped blank casting and arrangement mode thereof - Google Patents
Submerged nozzle for special-shaped blank casting and arrangement mode thereof Download PDFInfo
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- CN104117665A CN104117665A CN201410350560.XA CN201410350560A CN104117665A CN 104117665 A CN104117665 A CN 104117665A CN 201410350560 A CN201410350560 A CN 201410350560A CN 104117665 A CN104117665 A CN 104117665A
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Abstract
The invention discloses a submerged nozzle for special-shaped blank casting and an arrangement mode thereof. The submerged nozzle is annular, and a side wall with a hollow inner cavity is formed. A circular first opening is formed in the upper end face of the side wall, and a T-shaped second opening is formed in the lower end face of the side wall. A vertical part and a horizontal part which is connected with the middle of the vertical part are arranged on the edge of the second opening, the center of the circle of the first opening and the center of the second opening are both placed on the axis of the side wall, and the area of the first opening is equal to the area of the second opening. The hollow inner cavity is formed by correspondingly extending to the edge of the second opening from the edge of the first opening in the quasi-generatrix direction in a cut-through mode. According to the scheme, a stable and even flow field can be formed in a crystallizer, particularly the temperature and component uniformity in the transverse direction of the heat center of molten steel and the cross section of the crystallizer are improved, floating removal of nonmetallic inclusion in the molten steel and primary blank shell growth can be facilitated, and casting blank texture and surface quality are improved.
Description
Technical field
The present invention relates to metallurgical technology field, belong to steel billet casting cycle, particularly a kind of Hot Metal in Beam Blank submersed nozzle device and arrangement thereof for casting.
Background technology
Continuous casting steel machine is the technology of steel billet that the continuous condensation of molten steel is.Molten steel in tundish continuously injects crystallizer by the mouth of a river of being prepared by refractory material, cooling rear formation strand.Submersed nozzle can come molten steel and air are isolated, and the secondary oxidation of control molten steel in casting cycle, improves Molten Steel Cleanliness; The mouth of a river reasonable in design and the arrangement at the mouth of a river, can be stablized, uniform crystallizer flow field, to guarantee the normal growth of initial solidification shell, and impel inclusion content in melting steel to float rapidly, realize high-quality steel continuously, low-cost production.
Hot Metal in Beam Blank is compared with slab, square billet, and casting section shape is more complicated, and its crystallizer internal cavity section is " H " shape, mobile and the heat radiation at variant position differs greatly, obtain good crystallizer flow field, just must, for beam blank mould feature, redesign submersed nozzle and arrangement.
Hot Metal in Beam Blank cross section can simply be divided into the edge of a wing of a web and symmetrical distribution, totally three parts.Under conventional art, the submersed nozzle of Hot Metal in Beam Blank and casting mode mainly contain three kinds: the one, and adopt two through-type semi-submersible mouths of a river to carry out semi-open-type casting, two mouths of a river are arranged in the crossing trigonum of crystallizer web and the edge of a wing, insert in crystallizer lower end, the mouth of a river, upper end, the mouth of a river is infundibulate, has certain distance with tundish bottom surface.This mode can reduce the impact of beam, but can not realize the full guard casting of molten steel, causes part molten steel oxidized, has reduced Molten Steel Cleanliness.The 2nd, done on this basis improvement, upper end, the mouth of a river is connected with tundish bottom, still adopt two through-type soaking water gaps to cast in the crossing trigonum of web and the edge of a wing, can realize full guard casting.Yet molten steel impact depth is larger in the through-type mouth of a river, molten steel thermal center (-tre) moves down, be unfavorable for the floating of field trash and initial solidification shell growth.Meanwhile, the molten steel that flow out at the through-type mouth of a river mainly concentrates on trigonum, makes whole Hot Metal in Beam Blank transverse temperature, component difference larger, easily causes the mass defects such as crackle and segregation.The 3rd, adopt single immersed nozzle to cast in the middle of Hot Metal in Beam Blank web, which can effectively be improved flow field and the temperature field of Mold, can improve largely slab quality.But limited by web thickness, mouth of a river size is less, and is difficult to realize quick change, cause applying this casting mode, the mouth of a river is shorter service life, even waters stove number lower, cannot form stable batch production, thereby reduce production efficiency.
Publication number is that the patent of invention of CN 101091982A has proposed a kind of method and apparatus that carries out Hot Metal in Beam Blank protective casting with single immersed nozzle, adopts a circle to be placed in beam blank mould web centre to two water holes submersed nozzle of flat transition and casts.Which has reduced molten steel impact depth.But; the high-temperature molten steel of mouth of a river outlet can only flow to the longitudinal two ends of web; both sides, the edge of a wing can not get supplementing of high-temperature molten steel; make the horizontal temperature of strand and cost variance larger; and; mouth of a river wall and crystallizer web wall identity distance, from close to very, easily occur " bridgings ", are unfavorable for that covering slag melts and lubricates.In addition, in order to make the mouth of a river can put into web, the wall thickness at the mouth of a river is dwindled, reduced the service life at the mouth of a river.
Publication number is that the patent of invention of CN 102294454A has proposed the arrangement of submersed nozzle for a kind of beam blank mould, adopt two upper ends to be funnel-form, lower end is the mouth of a river that cylinder, bottom lock and side have three water holes, be placed in respectively in two trigonums of intersecting in beam blank mould web and the edge of a wing and cast.Which can be disperseed the impact dynamics of molten steel, in crystallizer, form the flow field of stable and uniform, improve the thermal center (-tre) of molten steel, also can improve temperature and the homogeneity of ingredients of crystallizer section, be conducive to the floating of non-metallic inclusions in molten steel and the growth of initial solidification shell, can improve surface quality and the Molten Steel Cleanliness of strand.But, because at present Hot Metal in Beam Blank size is generally less than normal, three water holes are set in the bottom of submersed nozzle and make each water hole spacing less, reduced mouth of a river service life, cause production cost higher.Another shortcoming of this invention is, the bottom lock of submersed nozzle, and there is certain distance each water hole lower wall surface and bottom surface, the mouth of a river on sidewall, while changing the mouth of a river, part molten steel still remains in the mouth of a river, scald personnel easily occurs take as main industrial accident.
Known for these reasons, prior art lower different type billet crystallizer submersed nozzle and arrangement thereof are difficult to meet low cost in Hot Metal in Beam Blank production process and the requirement of steady production.
Summary of the invention
In order to address the above problem, the embodiment of the present invention provides a kind of Hot Metal in Beam Blank casting submersed nozzle on the one hand, it comprises: be ring body shape, be formed with the sidewall of hollow cavity, the upper surface of described sidewall is formed with the first rounded opening, the lower surface of described sidewall is formed with the second T-shaped opening, the edge of described the second opening has vertical portion and the horizontal part being connected with the middle part of described vertical portion, the center of the center of circle of described the first opening and described the second opening is all positioned on the axis of described sidewall, the area of described the first opening equates with the area of described the second opening, the edge that described hollow cavity extends to described the second opening by the edge of described the first opening along the direction correspondence of accurate bus is formed through, wherein, described accurate bus be on described the first edge of opening a bit with described the second edge of opening on any line, on described the first edge of opening a bit with described the second edge of opening on a bit respectively by take axis cross section that described sidewall axis is limit with described the first edge of opening and described the second edge of opening is crossing forms.
In submersed nozzle as above, preferably, described vertical portion comprises: top edge, middle edge and lower limb, one end of one end of described top edge, one end of described middle edge and the other end and described lower limb is in turn connected to form the described vertical portion of right side gap, and described top edge and described lower limb are symmetrical about the X-direction in the plane at place, described lower surface; Described horizontal part comprises right hand edge, and described right hand edge is horizontal positioned and gap ∪ shape left, and one end of described right hand edge is connected with the other end of described top edge and the other end of described lower limb respectively with the other end.
In submersed nozzle as above, preferably, the other end of described top edge and the junction of one end of described right hand edge are, the equal rounding in the junction of the other end of the other end of described right hand edge and described lower limb.
In submersed nozzle as above, preferably, described top edge is inverted ∪ shape, and described lower limb is ∪ shape, and described middle edge is vertical shape.
In submersed nozzle as above, preferably, perpendicular to horizontal plane and the crossing cross section forming of described sidewall of described sidewall axis, contain the 3rd opening, the edge edge and corner position rounding of described the 3rd opening
In submersed nozzle as above, preferably, the upper surface of described sidewall is annular, and the lower surface of described sidewall is the combination shape of T shape in cylindrical.
The embodiment of the present invention also provides the arrangement of a kind of Hot Metal in Beam Blank casting with submersed nozzle on the other hand, and it is as follows: the position at two mouths of a river along Hot Metal in Beam Blank web central vertical line axisymmetricly; In crystallizer, a submersed nozzle is placed respectively in crossing two trigonums that form of the edge of a wing of Hot Metal in Beam Blank and web, and casts simultaneously, and the placement location of two described submersed nozzles along Hot Metal in Beam Blank web central vertical line axisymmetricly; Wherein, described submersed nozzle is aforesaid submersed nozzle, and the horizontal part of described submersed nozzle is towards the center of described web.
In submersed nozzle as above, preferably, the upper surface of described submersed nozzle is connected with the bottom of tundish.
In submersed nozzle as above, preferably, insert after molten steel the lower surface of described submersed nozzle, and deeply the subsurface distance range of top molten steel to described crystallizer is 20mm～80mm.
In submersed nozzle as above, preferably, the axis of described submersed nozzle overlaps with the center line of the trigonum of described Hot Metal in Beam Blank.
The beneficial effect that technical scheme provided by the invention is brought is:
(1), by adopting the upper and lower penetrating variable cross-section mouth of a river, not only can stablize the mobility of molten steel in submersed nozzle, the impact dynamics that can also disperse the mobile molten steel in submersed nozzle bottom, in crystallizer, form the flow field of stable and uniform, improve the thermal center (-tre) of molten steel, also can improve crystallizer section, especially the temperature of horizontal direction and homogeneity of ingredients, be conducive to the floating removal of non-metallic inclusions in molten steel and the growth of initial solidification shell, can reduce strand column crystal ratio and segregation, improve continuous casting billet structure and surface quality, also can improve Molten Steel Cleanliness, thereby improved the stability of producing.
(2), simple in structure, be easy to manufacture, can reduce submersed nozzle difficulty of processing.
(3), long service life, can reduce production costs.
(4), the lower end of submersed nozzle is through hole, while changing submersed nozzle process, do not retain molten steel in submersed nozzle, can guarantee operating personnel's safety in production.
Accompanying drawing explanation
A kind of Hot Metal in Beam Blank casting that Fig. 1 provides for embodiment of the present invention perspective view of submersed nozzle;
Fig. 2 is the perspective view after dissecing along the A-A line of Fig. 1;
A kind of Hot Metal in Beam Blank casting that Fig. 3 provides for embodiment of the present invention structural representation of the upper surface of submersed nozzle;
A kind of Hot Metal in Beam Blank casting that Fig. 4 provides for embodiment of the present invention structural representation of the lower surface of submersed nozzle;
A kind of submersed nozzle that Fig. 5 provides for the embodiment of the present invention is arranged in the structural representation of the cross section in crystallizer.
The specific embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Referring to Fig. 1-4, the embodiment of the present invention provides a kind of Hot Metal in Beam Blank casting submersed nozzle, and it comprises: sidewall 1, and this sidewall 1 is ring body shape, is formed with upper and lower penetrating through hole along its axis direction Z at the middle part of sidewall 1, and the upper and lower side of sidewall 1 all opens wide.Sidewall 1 comprises upper surface 11, lower surface 12, lateral surface 13 and medial surface 14, and upper surface 11 is formed with the first opening 110, and in other words the first opening is formed by the Plane intersects at through hole and 11 places, upper surface, and the first opening is rounded; Lower surface 12 is formed with the second opening 120, in other words the second opening is formed by the Plane intersects at through hole and 12 places, lower surface, the second opening is T-shaped, and the center of circle of the center of the second opening and the first opening is on the axis direction Z of sidewall 1 (or being projected correspondence relation) all on the axis direction of sidewall 1; In through hole, be hollow cavity 10, the medial surface 14 of sidewall is hollow cavity 10 with the upper and lower end face space that the plane at place surrounds respectively, and during application, hollow cavity 10 flows into the passage in crystallizer for the molten steel as in tundish.Particularly, hollow cavity 10 by the edge of the first opening 110 a little along the direction of the accurate bus of answering with all-pair, extend to the second opening 120 edge be formed through, wherein, with on the edge of the first opening 110 certain some corresponding accurate bus refer to the line of this certain any a bit and on the edge of the second opening, this certain a bit by fiducial axis line cross section and the first edge of opening are crossing, form, a bit intersecting and forming by fiducial axis line cross section and the second edge of opening on this second edge of opening, this fiducial axis line cross section is to take the axis (axis of sidewall) of submersed nozzle as limit and perpendicular to the plane of upper surface and lower surface, this certain a bit and on the second edge of opening a bit respectively by take fiducial axis line cross section that axis is limit with the first edge of opening and the second edge of opening is crossing forms.That is to say that certain on the first edge that is corresponding relation on fiducial axis line cross section is a bit connected to form accurate bus a bit and on the second edge.Referring to Fig. 1, the C point of take on the edge of the first opening is example, and the axis of sidewall is the center O of the second opening
1center of circle O with the first opening
2line, take axis as limit and cross fiducial axis line cross section that C orders and the edge of the second opening intersects at B point, the line between B point and C point is the accurate bus corresponding with C point.The accurate bus corresponding with other points on the edge of the first opening can for example, form according to the mode of certain the accurate bus formation that a bit (C point) is corresponding on the edge with the first opening.The shape in hollow cavity 10 arbitrary cross section in the horizontal direction (or horizontal plane intersects from medial surface the cross section forming) is different with the shape of the first opening 110, be variable cross-section, so this submersed nozzle is called the submersed nozzle of variable cross-section.Even for the molten steel flow speed stability that makes to circulate in inner chamber, the area of the first opening 110 equates with the area of the second opening 120.
For easy to operate, the lateral surface 13 of sidewall 1 is cylindrical, and upper surface 11 is surrounded by the first outer ring and the first opening, and in other words ringwise, the radius of the first outer ring is greater than the radius of the first opening in upper surface; The lower surface 12 of sidewall 1 is surrounded by the second outer ring and the second opening, and in other words lower surface is the combination shape of T shape in cylindrical, and the radius of the second outer ring is greater than the internal diameter of the second opening.Preferably, the center of circle of the center of circle of the first outer ring and the first opening overlaps (concentric circles), the center superposition of the center of circle of the second outer ring and the second opening, and this center is intersected and is formed by the vertical center line of vertical portion and the horizontal center line of horizontal part.
The edge of the second opening 120 comprises vertical portion and horizontal part, horizontal part is connected in the middle part of vertical portion to form T shape in the mode of level, vertical portion comprises: top edge 121, middle edge 122 and lower limb 123, one end of one end of one end of top edge 121, middle edge 122 and the other end and lower limb 123 is in turn connected to form the vertical portion of right side gap, and top edge and lower limb are symmetrical about the X-direction in the plane at place, lower surface; Horizontal part comprises: right hand edge 124, and the other end of one end of the other end of top edge 121, right hand edge 124 and the other end, lower limb 123 is in turn connected to form the horizontal part of left side gap, and right side gap and left side gap connect.To be parallel to arbitrary plane of the plane being formed by Y direction and axis, cut the sidewall that comprises top edge and lower limb, the section configuration of the medial surface obtaining is also isosceles trapezoid, and X-direction is all positioned at lower surface and mutually vertical also all by the center of the second opening with Y direction.
Symmetrical configuration due to top edge and lower limb, the top edge of take below describes its structure as example, referring to Fig. 4, top edge 121 comprises upper left section 1211, upper right section 1212 and the first central segment 1210, one end of one end of one end of upper left section 1211, the second central segment 1210 and the other end and upper right section 1212 is in turn connected to form the spill that Open Side Down, further, the first central segment is arcuate line segment.Upper left section and upper right section are preferably vertical line segment, with lower surface Y direction planar parallel, now top edge is ∩ shape.Middle edge is vertical shape
Right hand edge 124 comprises upper left section 1240, lower-left section 1241 and the second central segment 1242, one end of one end of one end of upper left section 1240, the second central segment 1242 and the other end and lower-left section 1241 is in turn connected to form recess (left side opening) to the right, further, the second central segment 1212 is arcuate line segment.Duan He lower-left, upper left section is preferably horizontal line section, parallel with the X-direction in the plane at place, lower surface, and now right hand edge is gap towards the ∪ shape of left (left side opening).The equal rounding in edges and corners at the edge of the second opening.
In order further to form the flow field of stable and uniform in crystallizer, the edge edge and corner position rounding in arbitrary cross section of hollow cavity 10 along continuous straight runs, in other words the edge edge and corner position rounding in arbitrary cross section of the medial surface along continuous straight runs of sidewall 1.
The molten steel temperature circulating in hollow cavity due to submersed nozzle is high, and in order to mention the heat resistance of submersed nozzle, the material of submersed nozzle is refractory material.
The present invention also provides the arrangement of a kind of Hot Metal in Beam Blank casting with submersed nozzle, referring to Fig. 5, and when applying above-mentioned submersed nozzle and casting in crystallizer,
A submersed nozzle is placed respectively in two trigonums that the edge of a wing 2 of Hot Metal in Beam Blank and web 3 intersect formation in crystallizer, the placement location of two submersed nozzles along Hot Metal in Beam Blank web central vertical line L axisymmetricly, and the horizontal part of any submersed nozzle is in a horizontal manner towards the center of web Q, be that the gap side of horizontal part is away from the center Q of web, the tundish of carrying molten steel is positioned at the top of submersed nozzle, during casting, two submersed nozzles are cast simultaneously, molten steel in tundish is in submersed nozzle flows into crystallizer, under the effect of crystallizer, form Hot Metal in Beam Blank, this crystallizer can be described as beam blank mould.
For making the molten steel casting degree of depth reasonable, when casting, the upper surface of submersed nozzle is connected with the bottom of tundish, and insert after molten steel the lower surface of submersed nozzle, and lower surface is 20～80mm apart from the distance of molten steel liquid level, is preferably 60mm.
The axis of two submersed nozzles (the axle center O of two submersed nozzles that overlaps with center line on two trigonum vertical directions respectively
1respectively with the center superposition of two trigonums), and intersect to obtain the uniform Hot Metal in Beam Blank of temperature and composition with the center line M of the web of Hot Metal in Beam Blank.
In sum, the beneficial effect of the embodiment of the present invention is as follows:
(1), by adopting the upper and lower penetrating variable cross-section mouth of a river, not only can stablize the flow stability of molten steel in submersed nozzle, the impact dynamics that can also disperse the mobile molten steel in submersed nozzle bottom, in crystallizer, form the flow field of stable and uniform, improve the thermal center (-tre) of molten steel, also can improve crystallizer section, especially the temperature of horizontal direction and homogeneity of ingredients, be conducive to the floating removal of non-metallic inclusions in molten steel and the growth of initial solidification shell, can reduce strand column crystal ratio and segregation, improve continuous casting billet structure and surface quality, also can improve Molten Steel Cleanliness.
(2), simple in structure, be easy to manufacture, can reduce submersed nozzle difficulty of processing.
(3), long service life, can reduce production costs.
(4), the lower end of submersed nozzle is through hole, while changing submersed nozzle process, do not retain molten steel in submersed nozzle, can guarantee operating personnel's safety in production.
As known by the technical knowledge, the present invention can realize by other the embodiment that does not depart from its Spirit Essence or essential feature.Therefore, above-mentioned disclosed embodiment, with regard to each side, all just illustrates, and is not only.Change within the scope of the present invention all or within being equal to scope of the present invention is all included in the invention.
Claims (10)
1. a Hot Metal in Beam Blank casting submersed nozzle, is characterized in that, described submersed nozzle comprises:
Be ring body shape, be formed with the sidewall of hollow cavity, the upper surface of described sidewall is formed with the first rounded opening, the lower surface of described sidewall is formed with the second T-shaped opening, the edge of described the second opening has vertical portion and the horizontal part being connected with the middle part of described vertical portion, the center of the center of circle of described the first opening and described the second opening is all positioned on the axis of described sidewall, and the area of described the first opening equates with the area of described the second opening;
The edge that described hollow cavity extends to described the second opening by the edge of described the first opening along the direction correspondence of accurate bus is formed through;
Wherein, described accurate bus be on described the first edge of opening a bit with described the second edge of opening on any line, a bit intersecting and forming by fiducial axis line cross section and described the first edge of opening on described the first edge of opening, a bit being intersected and forming with described the second edge of opening by described fiducial axis line cross section on described the second edge of opening, described fiducial axis line cross section is to take the axis of described submersed nozzle as limit and perpendicular to the plane of described upper surface and described lower surface.
2. submersed nozzle according to claim 1, it is characterized in that, described vertical portion comprises: top edge, middle edge and lower limb, one end of one end of described top edge, one end of described middle edge and the other end and described lower limb is in turn connected to form the described vertical portion of right side gap, and described top edge and described lower limb are symmetrical about the X-direction in the plane at place, described lower surface;
Described horizontal part comprises right hand edge, and described right hand edge is horizontal positioned and gap ∪ shape left, and one end of described right hand edge is connected with the other end of described top edge and the other end of described lower limb respectively with the other end.
3. submersed nozzle according to claim 2, is characterized in that, the other end of described top edge and the junction of one end of described right hand edge are, the equal rounding in the junction of the other end of the other end of described right hand edge and described lower limb.
4. submersed nozzle according to claim 2, is characterized in that, described top edge is inverted ∪ shape, and described lower limb is ∪ shape, and described middle edge is vertical shape.
5. submersed nozzle according to claim 1, is characterized in that, perpendicular to horizontal plane and the crossing cross section forming of described sidewall of described sidewall axis, contains the 3rd opening, the edge edge and corner position rounding of described the 3rd opening.
6. submersed nozzle according to claim 1, is characterized in that, the upper surface of described sidewall is annular, and the lower surface of described sidewall is the combination shape of T shape in cylindrical.
7. an arrangement for submersed nozzle for Hot Metal in Beam Blank casting, is characterized in that, described arrangement is as follows:
In crystallizer, a submersed nozzle is placed respectively in crossing two trigonums that form of the edge of a wing of Hot Metal in Beam Blank and web, and the placement location of two described submersed nozzles along Hot Metal in Beam Blank web central vertical line axisymmetricly;
Wherein, described submersed nozzle is the submersed nozzle described in arbitrary claim in the claims 1～6, and the horizontal part of described submersed nozzle is towards the center of described web.
8. arrangement according to claim 7, is characterized in that, the upper surface of described submersed nozzle is connected with the bottom of tundish.
9. according to the arrangement described in claim 7 or 8, it is characterized in that, insert after molten steel the lower surface of described submersed nozzle, and deeply the subsurface distance range of top molten steel to described crystallizer is 20mm～80mm.
10. arrangement according to claim 7, is characterized in that, the axis of described submersed nozzle overlaps with the center line of the trigonum of described Hot Metal in Beam Blank.
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| CN201410350560.XA CN104117665B (en) | 2014-07-22 | 2014-07-22 | Hot Metal in Beam Blank casting submersed nozzle and arrangement thereof |
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| CN201410350560.XA CN104117665B (en) | 2014-07-22 | 2014-07-22 | Hot Metal in Beam Blank casting submersed nozzle and arrangement thereof |
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| CN104117665B CN104117665B (en) | 2016-04-06 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49123125A (en) * | 1973-03-29 | 1974-11-25 | ||
| JPS63295056A (en) * | 1987-05-27 | 1988-12-01 | Nkk Corp | Molten metal pouring nozzle |
| JPH09123125A (en) * | 1995-10-30 | 1997-05-13 | Komatsu Zenoah Co | Shredder hammer |
| CN201338092Y (en) * | 2008-12-30 | 2009-11-04 | 本钢板材股份有限公司 | Submerged nozzle for continuous casting |
| CN102294454A (en) * | 2011-08-31 | 2011-12-28 | 中冶南方工程技术有限公司 | Arrangement structure of immerged water inlets for special blank crystallizer |
| CN203956074U (en) * | 2014-07-22 | 2014-11-26 | 莱芜钢铁集团有限公司 | Hot Metal in Beam Blank is submersed nozzle and arrangement thereof for casting |
-
2014
- 2014-07-22 CN CN201410350560.XA patent/CN104117665B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49123125A (en) * | 1973-03-29 | 1974-11-25 | ||
| JPS63295056A (en) * | 1987-05-27 | 1988-12-01 | Nkk Corp | Molten metal pouring nozzle |
| JPH09123125A (en) * | 1995-10-30 | 1997-05-13 | Komatsu Zenoah Co | Shredder hammer |
| CN201338092Y (en) * | 2008-12-30 | 2009-11-04 | 本钢板材股份有限公司 | Submerged nozzle for continuous casting |
| CN102294454A (en) * | 2011-08-31 | 2011-12-28 | 中冶南方工程技术有限公司 | Arrangement structure of immerged water inlets for special blank crystallizer |
| CN203956074U (en) * | 2014-07-22 | 2014-11-26 | 莱芜钢铁集团有限公司 | Hot Metal in Beam Blank is submersed nozzle and arrangement thereof for casting |
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| CN104117665B (en) | 2016-04-06 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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