CN2531901Y - Thin board blanket continuous casing crystallizer - Google Patents
Thin board blanket continuous casing crystallizer Download PDFInfo
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- CN2531901Y CN2531901Y CN 02216495 CN02216495U CN2531901Y CN 2531901 Y CN2531901 Y CN 2531901Y CN 02216495 CN02216495 CN 02216495 CN 02216495 U CN02216495 U CN 02216495U CN 2531901 Y CN2531901 Y CN 2531901Y
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Abstract
A thin-slab continuous casting mould comprises two wide sidewalls and two mobile narrow sidewalls, wherein, the two wide sidewalls and the two mobile narrow sidewalls together form the inner chamber of the thin-slab continuous casting mould; the surface of the wide sidewall comprises at least two concave curved surfaces, intermediate planes between adjacent concave curved surfaces and a basic plane; the concave curved surfaces corresponding to the two wide sidewalls structure at least two casting areas; the spacing of the wide sidewall corresponding to the intermediate plane is more than that of the wide sidewall corresponding to the basic plane, but is less than that of the wide sidewall corresponding to the concave curved surface; the centerlines of at least two concave curved surfaces of the wide sidewalls form an angle with a vertical centerline. With the utility model, the thin-slab width can reach more than 1800 mm; the nozzle can be changed in the casting process; the adoption of the design with multiple casting areas enables great reduction of quantity of steel passing through a single casting area, so that the molten steel surface inside the mould can keep steady; the utility model increases the regulation means of the molten steel flow field and the temperature field inside the mould to decrease the deformation of the slab shell and improve slab casting quality.
Description
Technical field
The utility model relates to continuous casting steel machine technology, particularly crystallizer for continuous casting of thin slabs.
Background technology
Crystallizer is the critical component during continuous casting steel machine is produced, and it mainly acts on is that liquid molten steel is cooled off, is frozen into the casting blank shell with certain solidified layer thickness, contoured fast.
" crystallizer of continuous casting of thin slabs " then is the critical component during the continuous casting steel machine of sheet billet is produced, its mainly act on be with liquid molten steel cool off fast, be frozen into have certain solidified layer thickness, sheet billet shell that section configuration has very big flakiness ratio.
Crystallizer for continuous casting of thin slabs normally is made of four water-cooled copper plates, wherein two narrow hereinafter to be referred as narrow sidewall, two are wide hereinafter to be referred as broad side walls.The position of two narrow sidewalls is adjustable, and the crystallizer bottom has determined the width of slab between the two apart from it; Two broad side walls positions are fixed basically, and crystallizer bottom is the thickness when it has determined that slab goes out crystallizer between the two.
Existing crystallizer for continuous casting of thin slabs can be divided into two classes usually, and a class is plate shaped crystallizer, as patent 88103709,94101396, PCT.JP95/01504 95.7.27 China Patent No. 95190694 etc.; Another kind of is funnel-type crystallizer, as patent DE-OS3400220 China Patent No. 85101082,93119688,91108427 etc.
Two broad side walls of plate shaped crystallizer are parallel basically.Be the casting sheet billet, the broad side walls spacing of the plate shaped crystallizer that has is very narrow.For this type of plate shaped crystallizer, for guaranteeing that submersed nozzle does not contact with two broad side walls and certain spacing arranged, under the prerequisite that does not reduce the submersed nozzle internal diameter, can only be by reducing mouth of a river wall thickness and the mouth of a river shape that fries batter in a thin layer solved, the result causes the submersed nozzle cost to raise and the life-span reduces.Even so, still exist molten steel casting stream wide solidified shell washed away serious problem.In addition, because the broad side walls spacing is narrow, the volume in crystallizer upper pouring zone is less, and under the bigger situation of submersed nozzle steel-passing amount, liquid level fluctuation of molten steel is very big, and this will cause adverse influence to base quality and production direct motion.For addressing the above problem, the plate shaped crystallizer that has has suitably increased the spacing of broad side walls, increased but slab thickness is also corresponding when going out crystallizer, and be crystallizer for continuous casting of thin slabs truly no longer.
Two broad side walls of funnel-type crystallizer and on-plane surface, inside at the mid portion of inserting submersed nozzle, the gap ratio limit portion of recessed two broad side walls is big, makes it become a funnelform pouring area.Shrink from top to bottom gradually in this zone, perhaps is punctured into final thickness in the crystallizer bottom; Perhaps making strand still have convexity when going out the crystallizer end opening, is final thickness to sufficient roller with corresponding gradual change curved surface with the strand flattening-out by subsequently several.
The design of funnel-type crystallizer makes the submersed nozzle wall thickness to increase to some extent, and distance also can be amid a sharp increase between the mouth of a river and the broad side walls.For plate crystallizer; this type of crystallizer is owing to increased the volume in crystallizer upper pouring zone; brought the benefit of some metallurgical technology aspects, as liquid fluctuating being reduced to a certain extent, improving covering slag fusion situation etc. on crystallizer molten steel meniscus.But thereupon again because of the increase of " hopper zone " tapering, cause casting blank shell and broad side walls frictional force to increase, produce the deficiencies such as tendency increase that crystallizer reduces, takes place sticker type breakout service life.
Above-mentioned two class thin slab mold common characteristic are to have only a pouring area, also have following common deficiency:
1. the very big wide sheet billet of flakiness ratio is not suitable for casting.Along with width of plate slab increases, in above-mentioned two class thin slab molds, the temperature difference of limit portion molten steel and central area molten steel also strengthens thereupon, thereby causes the tendency of strand generation quality of edges problem to increase, the possibility increase of bonding steel leakage takes place in the steel pouring process.Therefore prior art is difficult to the sheet billet of casting width more than 1700mm.
2. the molten steel beam can not interrupt in the steel pouring process, can not change mouth of a river operation, more can not change the operation of tundish fast.Therefore, it is lower that the stove number waters in the company of prior art situation lower thin sheet base continuous casting, is the upper limit with the submersed nozzle life-span usually.
In addition, because the broad side walls spacing of plate crystallizer is narrow, the volume in crystallizer upper pouring zone is less, and under the bigger situation of submersed nozzle steel-passing amount, liquid level fluctuation of molten steel is very big, and this will cause adverse influence to slab quality and production direct motion.Funnel-type crystallizer then exists because of " hopper zone " tapering is big, causes casting blank shell and broad side walls frictional force to increase, and crystallizer reduces, takes place the deficiencies such as tendency increase of sticker type breakout service life.
Summary of the invention
The purpose of this utility model is to design a kind of crystallizer for continuous casting of thin slabs, to overcome above-mentioned the deficiencies in the prior art, be applicable to the sheet blank continuous casting that width is bigger, increase the specification limit of sheet blank continuous casting product, make and change the mouth of a river in the casting cycle fast and become possibility.After having adopted a plurality of pouring areas, the steel-passing amount of single pouring area significantly reduces, and helps reducing liquid level fluctuation of molten steel, and the cup depth of single concave curved surface also can reduce, and helps alleviating the friction of base shell to broad side walls, improves copper plate of crystallizer service life; Increased the flow field of molten steel in mold, the regulating measure in temperature field, the distortion of base shell has been reduced to some extent, the kind that help improving slab quality, enlarges the sheet blank continuous casting product.
For achieving the above object, the crystallizer for continuous casting of thin slabs of the utility model design comprises the narrow sidewall of two broad side walls and two removable positions; Two broad side walls constitute the inner chamber of crystallizer for continuous casting of thin slabs with two narrow sidewalls; The surface of described broad side walls has comprised at least two concave curved surfaces, the mid-plane between the adjacent concave curved surface and a basic plane; The concave curved surface of described two broad side walls correspondences constitutes at least two pouring areas.
The broad side walls spacing of described mid-plane correspondence is greater than the broad side walls spacing of basic plane correspondence, less than the spacing of the broad side walls of concave curved surface correspondence; Smooth and easy with what keep that molten steel flows mutually between the concave curved surface; The volume that can increase pouring area and zone line is beneficial to reducing of liquid level fluctuation of molten steel; The spacing of mid-plane correspondence increases, and the ratio of length of curve and air line distance between the adjacent concave curved surface is reduced, and the base hull shape becomes and reduces; But the spacing of mid-plane correspondence also should not be too big, in order to avoid the friction between casting blank shell and the mid-plane is excessive.
Further, the depression center line of at least two concave curved surfaces of described broad side walls and vertical center line have angle β 1, β 2, and 1≤0.5 ° of 0 °≤β, 2≤0.5 ° of 0 °≤β; Recommend to adopt symmetric design, i.e. β 1=β 2; The spacing that makes two concave curved surfaces depression centers from top to bottom, trace reduces, and shrinks with the cooling that cooperates casting blank shell between two concave curved surfaces.
Again, the mid-plane width of described broad side walls to guarantee to have between the adjacent concave curved surface plane transition of enough distances, avoids the casting blank shell stress at this position to concentrate and the generation quality problems more than or equal to the spacing of two broad side walls on the relevant position.
The spacing of the depression center line of two adjacent concave curved surfaces of described broad side walls should be between 400mm～1200mm.The spacing of the depression center line of two adjacent concave curved surfaces can not be too big, otherwise when a pouring area molten steel short interruption, the molten steel of another pouring area is difficult in time replenish and to keep liquid level basicly stable.The spacing of the depression center line of two adjacent concave curved surfaces can not be too little, also must consider the restriction of the factors such as number of the width of broad side walls total length L 1, mid-plane and pouring area, and the restriction of other mechanical mechanism sizes such as mouth of a river mechanism.
The distance that the mid-plane of described broad side walls departs from basic plane progressively reduces from top to bottom; At the topmost of broad side walls, the distance that mid-plane departs from basic plane is Δ W2, and Δ W2 is 0.10～0.75 times of the slab thickness poured into a mould.
The utility model has the advantages that: adopt crystallizer of the present utility model, the sheet billet width can increase the specification limit of sheet blank continuous casting product more than 1800mm; The fast changeable mouth of a river in the casting cycle; Owing to adopt the design of a plurality of pouring areas, the steel-passing amount in the single pouring area significantly reduces, and helps keeping the steady of molten steel in mold liquid level; Simultaneously, also can reduce the design cup depth of concave curved surface, help reducing of the friction of base shell, improve copper plate of crystallizer service life broad side walls; Increased the flow field of molten steel in mold, the regulating measure in temperature field, the distortion of base shell has been reduced to some extent, the kind that help improving slab quality, enlarges the sheet blank continuous casting product.
Description of drawings
Fig. 1 is a schematic top plan view of the present utility model.
Among the figure:
1,2 is the crystallizer broad side walls; 3,4 is the narrow sidewall of crystallizer;
5 is the basic plane on the crystallizer broad side walls;
6,7,8 is concave curved surface on the crystallizer broad side walls;
9,10 is mid-plane on the crystallizer broad side walls;
11 is submersed nozzle;
L1 represents the width of crystallizer broad side walls, and it has determined the maximum strand width that can pour into a mould;
L2, L3 represent the scope that narrow sidewall 3,4 can move;
L4, L5 represent between the concave curved surface 6,7 respectively, the spacing between the concave curved surface 7,8.
W1 is the spacing of the broad side walls of the basic plane correspondence on the broad side walls, also is the spacing of crystallizer bottom broad side walls, equals the slab thickness of being poured into a mould approx;
W2, W3 are the spacing of the crystallizer broad side walls of broad side walls mid-plane correspondence;
W4, W5, W6 are the spacing of the crystallizer broad side walls of broad side walls concave curved surface correspondence.
Fig. 2 A-A generalized section of the present utility model.
Among the figure:
H1 is the crystallizer total height;
H2 is the height of concave curved surface bottom from the broad side walls bottom;
Fig. 3 is the B-B generalized section of Fig. 1;
Fig. 4 is the local enlarged diagram of concave curved surface of the present utility model.
Among the figure:
Δ W1 is the cup depth of concave curved surface;
Δ W2 is the deflection of mid-plane;
Δ L represents the width of concave curved surface;
Seamlessly transit between 12 expression concave curved surfaces and the plane;
Fig. 5 is an embodiment schematic diagram of the present utility model.
Fig. 6 is the C-C generalized section of Fig. 5.
The specific embodiment
As shown in Figure 1, the utility model comprises narrow sidewall 3,4 compositions of 1,2 and two removable positions of two broad side walls; Two broad side walls 1,2 are staggered relatively, constituted the inner chamber of crystallizer for continuous casting of thin slabs with two narrow sidewalls 3,4; The surface of broad side walls has comprised a plurality of concave curved surfaces; Fig. 1 has exemplified three concave curved surfaces 6,7,8,9,10 and basic planes 5 of the mid-plane between the adjacent concave curved surface; Spacing W4, W6, the W5 of two broad side walls of concave curved surface 6,7,8 correspondences are more roomy, have constituted 3 pouring areas of crystallizer.Submersed nozzle 11 inserts crystallizer in pouring area, molten steel then injects crystallizer continuously by submersed nozzle 11.
On the position of basic plane 5 correspondences, the spacing of broad side walls is W1, W1 equal approx cast the thickness of sheet billet.The suitable cast of this crystallizer thickness is the sheet billet between 50～100mm.
Owing on the broad side walls a plurality of concave curved surfaces are arranged, so this crystallizer is to there being a plurality of pouring areas.(3 concave curved surfaces are arranged on the broad side walls shown in Figure 1, therefore 3 pouring areas are correspondingly arranged)
W4, W6, W5 are respectively the spacing of locational two broad side walls of concave curved surface 6,7,8 depression center correspondences.Crystallizer recommend to adopt symmetric design, i.e. W4=W5, and W4, W5 are generally 1.5～3.0 times of W1.Under the situation of odd number pouring area, the broad side walls spacing of middle pouring area can be slightly larger than the broad side walls spacing of limit portion pouring area, i.e. W6 〉=W4 (and W5).The size of W4, W5, W6 finally depends on the design of relevant each parameter of concave curved surface among Fig. 4.
On the position of mid-plane 9,10 correspondences, the spacing of two broad side walls is respectively W2, W3.Crystallizer recommends to adopt symmetric design, i.e. W2=W3.W2 (and W3) should be greater than W1, but is no more than W4 (and W5).
The width of mid-plane 9,10 strengthens from top to bottom gradually along short transverse.The width of mid-plane can not be too little, otherwise, lacking necessary plane transition between adjacent two concave curved surfaces, the easy stress of casting blank shell at two concave curved surfaces handing-over position is concentrated and the generation quality problems.At the topmost of broad side walls, the width of mid-plane 9,10 is more than or equal to spacing W2, the W3 of two broad side walls on the relevant position.But the width of mid-plane can not be too big, also must consider the restriction of distance between two adjacent concave curved surfaces.
The Thickness Design of broad side walls 1,2 and narrow sidewall 3,4 and another surface (water-cooled surface) design can be adopted existing disclosed mature technology, and Fig. 1 does not add description.
With reference to Fig. 2, the broad side walls surface of this crystallizer is made up of the mid-plane 9,10 between a basic plane 5, a plurality of concave curved surface 6,7,8 and the adjacent concave curved surface.On width and short transverse, seamlessly transit between concave curved surface and basic plane and the mid-plane.Because be to seamlessly transit, so each curved surface and interplanar do not have clear and definite boundary line, with dashed lines is represented among Fig. 2.
Depression center line M1, M2 and the vertical line of concave curved surface 6,8 becomes a small angle β 1, β 2 respectively, on one side this is because consider that two casting blank shells between the concave curved surface move downward, Yi Bian can cool off contraction.But the existence of two concave curved surfaces can hinder the free shrink of casting blank shell, thereby makes the very big stress of the inner generation of casting blank shell, easily makes base shell cracking even bleed-out.For this reason, the spacing at two concave curved surface depression centers must be from top to bottom, and trace reduces, and shrinks with the cooling that cooperates casting blank shell.Obviously, the selection of β 1, β 2 should be complementary 1＞0 ° of general 0.5 ° 〉=β, 2＞0 ° of 0.5 ° 〉=β with the solidification shrinkage rate of institute cast steel kind.Crystallizer recommends to adopt symmetric design, i.e. β 1=β 2.
L1 is the width of broad side walls, and it has determined this crystallizer can pour into a mould the Breadth Maximum of strand.The sheet billet of big flakiness ratio because the design of a plurality of pouring areas, this crystallizer are more suitable for casting.Cast the developed width of sheet billet between the narrow sidewall 3,4 apart from then having determined.In the casting process, the position of narrow sidewall 3 can be adjusted in the L2 scope, and the position of narrow sidewall 4 can be adjusted in the L3 scope, so the strand developed width can online adjusting in the L2+L3 scope.Crystallizer recommends to adopt symmetric design, i.e. L2=L3.Excessive with the liquid steel temperature difference in cast zone for the molten steel of avoiding limit portion, L2 (and L3) generally is no more than 10 times of W1.
The spacing that L4, L5 are respectively between concave curved surface 6, the 7 depression center lines, concave curved surface 7,8 caves between the center lines.Crystallizer recommends to adopt symmetric design, i.e. L4=L5.The size of L4 (and L5) should be determined according to the width of broad side walls total length L 1, mid-plane and the number of pouring area.Consider the restriction of other mechanical mechanism sizes such as mouth of a river mechanism, L4 (and L5) can not be too little.But L4 (and L5) is also unsuitable excessive, otherwise when a pouring area molten steel short interruption, the molten steel of another pouring area is difficult in time replenish and to keep liquid level basicly stable.L4 (and L5) generally should be between 400mm～1200mm.
H1 is the total height of crystallizer.H1 can not be too small, in order to avoid when going out the crystallizer end opening, the bleed-out accident takes place because of casting blank shell is too thin; H1 also should not be too big, in order to avoid increase the frictional force between casting blank shell and crystallizer broad side walls.H1 generally should be (between the 700mm～1300mm).
H2 equals the height that the crystallizer total height subtracts concave curved surface.In the H2 scope, about the spacing of two broad side walls, about all equate, be W1.The size of H2 should be able to satisfy the needs that seal the dummy ingot operation, generally between 200mm～500mm.
With reference to Fig. 3, concave curved surface 7,5 one-tenth certain included angle of mid-plane 10 and basic plane.At the top of crystallizer, W6＞W3＞W1; But highly be on the position of H2, the spacing that concave curved surface 7 and mid-plane 10 seamlessly transit to basic plane 5, two broad side walls all becomes W1.
Fig. 4 is the local enlarged diagram of concave curved surface 6.The concave curved surface that is exemplified among the figure is a taper seat, and it is cut to one section parabola mutually with horizontal plane, the latter's two ends and straight line smooth connection.The cup depth of concave curved surface reduces from top to bottom gradually along short transverse, seamlessly transits to broad side walls bottom concave curved surface 6 and basic plane 5, and promptly cup depth is zero.
Suppose that at the crystallizer topmost concave curved surface 6 cup depths are Δ W1, the distance that mid-plane departs from basic plane is Δ W2, and the principle of concave curved surface design is so:
1. Δ W1 generally gets 0.25～1.25 times of W1, guarantees that submersed nozzle inserts between back and broad side walls enough distances are arranged;
2. Δ W2 generally gets 0.10～0.75 times of W1.The spacing of two broad side walls is big slightly on the position of mid-plane correspondence, helps flowing mutually of molten steel between two pouring areas.
A, b point-to-point transmission length of curve should be complementary with the shrinkage factor of cast steel grade with the ratio of air line distance Δ L among the figure.Δ L can be considered as the width of concave curved surface.
As Fig. 5, shown in Figure 6, an embodiment of the present utility model.
It is made up of the narrow sidewall 3,4 of 1,2 and two removable positions of two broad side walls; Two broad side walls 1,2 are staggered relatively, constituted the inner chamber of this crystallizer with two narrow sidewalls 3,4; The surface of broad side walls has comprised mid-plane 9 and the basic plane 5 between two concave curved surfaces 6,7, the adjacent concave curved surface; Because of broad side walls has comprised two concave curved surfaces,, be two pouring area crystallizers so this crystallizer has 2 pouring areas.Submersed nozzle 11 inserts crystallizer in these two pouring areas, molten steel then injects crystallizer by these two submersed nozzles.
The spacing W1=65mm of the broad side walls of basic plane 5 correspondences.This crystallizer can be poured into a mould the sheet billet that thickness is slightly less than 65mm.
Crystallizer adopts symmetric design, two broad side walls spacing W3=135mm of concave curved surface 6,8 depression center correspondences.On the position of mid-plane 9 correspondences, the spacing W2=95mm of two broad side walls.
Depression center line M1, the M2 of concave curved surface 6,8 becomes a small angle β 1 and β 2 respectively with vertical line Z axle, their equal and opposite in directions, and direction is opposite, all is about 0.2 °.
The width L1=2000mm of broad side walls, the moving range of narrow sidewall 3,4 is L2=300mm.The strand width range that this crystallizer can be poured into a mould is 1300～1900mm.
Concave curved surface 6,8 also is a symmetric design, is the part of taper seat.Concave curved surface 6,8 is cut to one section parabola mutually with horizontal plane, and two ends smoothly link to each other with straight line; Top at broad side walls, the cup depth Δ W1=35mm of concave curved surface 6,8, width Delta L=600mm, the spacing L4=700mm at the depression center of two concave curved surfaces 6,8, the width of mid-plane 9 approximates 220mm, mid-plane 9 departs from the distance, delta W2=15mm on basic plane 5, is 0.23 times of W1.The total height of crystallizer also is the overall height H 1=1100mm of broad side walls, and the concave curved surface bottom is from the height H 2=350mm of broad side walls bottom.
Claims (10)
1. crystallizer for continuous casting of thin slabs comprises the narrow sidewall of two broad side walls and two removable positions; These two broad side walls constitute the inner chamber of crystallizer for continuous casting of thin slabs with two narrow sidewalls; It is characterized in that: the surface of described broad side walls has comprised at least two concave curved surfaces, the mid-plane between the adjacent concave curved surface and a basic plane; The concave curved surface of described two broad side walls correspondences constitutes at least two pouring areas.
2. crystallizer for continuous casting of thin slabs as claimed in claim 1 is characterized in that: the broad side walls spacing of described mid-plane correspondence is greater than the broad side walls spacing of basic plane correspondence, less than the spacing of the broad side walls of concave curved surface correspondence.
3. crystallizer for continuous casting of thin slabs as claimed in claim 1 or 2 is characterized in that: the depression center line of at least two concave curved surfaces of described broad side walls and vertical center line have angle β 1, β 2, and 1≤0.5 ° of 0 °≤β, 2≤0.5 ° of 0 °≤β.
4. crystallizer for continuous casting of thin slabs as claimed in claim 3 is characterized in that: have angle β 1, β 2 of the depression center line of at least two concave curved surfaces of described broad side walls and vertical center line is: β 1=β 2.
5. crystallizer for continuous casting of thin slabs as claimed in claim 1 or 2 is characterized in that: the mid-plane width of described broad side walls is more than or equal to the spacing of two broad side walls on the relevant position.
6. crystallizer for continuous casting of thin slabs as claimed in claim 3 is characterized in that: the mid-plane width of described broad side walls is more than or equal to the spacing of two broad side walls on the relevant position.
7. crystallizer for continuous casting of thin slabs as claimed in claim 1 or 2 is characterized in that: the spacing of the depression center line of two adjacent concave curved surfaces of described broad side walls should be between 400mm～1200mm.
8. crystallizer for continuous casting of thin slabs as claimed in claim 3 is characterized in that: the spacing of the depression center line of two adjacent concave curved surfaces of described broad side walls should be between 400mm～1200mm.
9. crystallizer for continuous casting of thin slabs as claimed in claim 1 or 2 is characterized in that: the distance that the mid-plane of described broad side walls departs from basic plane progressively reduces from top to bottom; At the topmost of broad side walls, the distance that mid-plane departs from basic plane is Δ W2, and Δ W2 is 0.10～0.75 times of the slab thickness poured into a mould.
10. crystallizer for continuous casting of thin slabs as claimed in claim 3 is characterized in that: the mid-plane of described broad side walls departs from the distance on basic plane for progressively reducing from top to bottom; At the topmost of broad side walls, mid-plane departs from the distance, delta W2 on basic plane, and Δ W2 is 0.10～0.75 times of the slab thickness poured into a mould.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02216495 CN2531901Y (en) | 2002-03-29 | 2002-03-29 | Thin board blanket continuous casing crystallizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02216495 CN2531901Y (en) | 2002-03-29 | 2002-03-29 | Thin board blanket continuous casing crystallizer |
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| CN2531901Y true CN2531901Y (en) | 2003-01-22 |
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| CN 02216495 Expired - Lifetime CN2531901Y (en) | 2002-03-29 | 2002-03-29 | Thin board blanket continuous casing crystallizer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109794586A (en) * | 2019-02-27 | 2019-05-24 | 山东钢铁股份有限公司 | A kind of crystallizer suitable for the casting of Profiled Slab CCM full guard |
-
2002
- 2002-03-29 CN CN 02216495 patent/CN2531901Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109794586A (en) * | 2019-02-27 | 2019-05-24 | 山东钢铁股份有限公司 | A kind of crystallizer suitable for the casting of Profiled Slab CCM full guard |
| CN109794586B (en) * | 2019-02-27 | 2023-10-03 | 山东钢铁股份有限公司 | Crystallizer suitable for full-protection casting of special-shaped blank continuous casting machine |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120329 Granted publication date: 20030122 |