CN203343422U - Continuous casting tundish slag stop dam - Google Patents
Continuous casting tundish slag stop dam Download PDFInfo
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- CN203343422U CN203343422U CN 201320387538 CN201320387538U CN203343422U CN 203343422 U CN203343422 U CN 203343422U CN 201320387538 CN201320387538 CN 201320387538 CN 201320387538 U CN201320387538 U CN 201320387538U CN 203343422 U CN203343422 U CN 203343422U
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- pod apertures
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- tundish
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Abstract
The utility model relates to a continuous casting tundish slag stop dam. The continuous casting tundish slag stop dam is composed of a slag stop dam body, flow guiding holes and lifting rings. The two flow guiding holes are symmetrical about the longitudinal center line of the slag stop dam body. The center of one flow guiding hole is located on the portion from one fourth to three eighths of the left side of the longitudinal center line and the center of the other flow guiding hole is located on the portion from one fourth to three eighths of the right side of the longitudinal center line. The center of each flow guiding hole is located on the portion from one eighth to one fourth of the upper side of the transverse center line of the slag stop dam body. The upward dip angle beta of the axis of each flow guiding hole ranges from 15 degrees to 20 degrees. The continuous casting tundish slag stop dam is long in service life, meanwhile solves the problems that molten steel flows in the mode that the molten steel is attached to the bottom, temperature stratification of the molten steel is generated and casting residual of a tundish is increased, can improve the quality of a continuous casting billet, and can reduce the steel consumption of the continuous casting billet.
Description
Technical field
The utility model relates to a kind of continuous casting slag blocking dam of middle ladle, belongs to Ferrous Metallurgy continuous casting slag blocking dam of middle ladle technical field.
Background technology
At present, domestic steel mill is in order to improve the flow field of molten steel in the continuous casting tundish, extend the time of staying of molten steel in tundish, promote the floating of field trash to get rid of, in the continuous casting tundish, flow control device is set, generally by turbulence inhibitor, slag blocking wall, dam, be used in combination, to reach better flow control effect.
CN2936498U(200520036602.9) a kind of slag blocking dam of middle ladle is disclosed, this dam is without pod apertures, outward appearance becomes column, one side arcwall face, opposite side is plane, hollow, and whole shape becomes " Kei-shaped ", by magnesia refractories, made, circle or curved wall apparent height are 1/2～2/3 of tundish head room.This dam is simple and easy to do, with low cost, can effectively improve slab quality.CN201755637U discloses the slag blocking wall in a kind of tundish, it mainly comprises body of wall and steel outlet hole, steel outlet hole is arranged on body of wall, it is characterized in that described steel outlet hole minute upper, middle and lower three row are arranged on body of wall, the longitudinal projection of described upper steel outlet hole and lower steel outlet hole is in two between steel outlet hole; Because steel outlet hole arranges rationally, can reach the reasonable layout steel flow to, reasonable layout hot-fluid, pushing off the slag is effective.
Above prior art atresia or straight hole dam, the major defect existed in producing and applying is, molten steel pastes the heavier and molten steel temperature layering of underflow, form larger dead band at pouring area, be unfavorable for the inclusion floating removal, annotate surplus, raised the iron and steel stock consumption of continuous casting billet, increased production cost and use the atresia dam to increase tundish.
Summary of the invention
The problem existed for the dam prior art, the utility model provides a kind of Novel continuous casting slag blocking dam of middle ladle.The pod apertures of this dam by accurate design solved well molten steel and pasted underflow, molten steel temperature layering and tundish and the technical barrier such as increase more than annotating.
The technical solution of the utility model is as follows:
A kind of continuous casting slag blocking dam of middle ladle, its vertical section is trapezoidal, by dam body, pod apertures and suspension ring, formed, pod apertures is two, two pod apertures are symmetrical arranged with respect to dam body longitudinal centre line, the pod apertures center of circle lays respectively at 1/4～3/8 place, about longitudinal centre line, and the pod apertures center of circle is positioned at 1/8～1/4 place, dam body cross central line top, and the axial line positive pitch β of pod apertures is 15 °～20 °.
Preferred according to the utility model, dam body height H is 250～400mm, and dam body thickness L is 120～200mm.
Preferred according to the utility model, pod apertures axial line positive pitch β be 15 °～18 °, aperture d is 60～120mm.Most preferred, pod apertures axial line positive pitch β be 18 °.
Preferred according to the utility model, the height H of described dam body is 300～350mm, and the thickness L of dam body is 160～180mm, and the aperture d of pod apertures is 70～90mm.
Preferred according to the utility model, each 1/4 place, left and right, dam body top arranges two suspension ring.Suspension ring are preferably " ∩ " ring shape.
Preferred according to the utility model, the dam body adopts prefabricated component, by the cast of magnesium aluminate spinel matter castable, is formed.
According to the utility model, the installation of described continuous casting slag blocking dam of middle ladle, method is as follows:
By the suspension ring of described continuous casting slag blocking dam of middle ladle body top, with driving lifting dam body, the base of dam body is imbedded in the tundish underwrite lining work, base length of embedment a is 15～25mm.Reality is smeared with magnesia coating in gap between dam body and liner in dundish, and dam installs.
The beneficial effects of the utility model are:
1, continuous casting slag blocking dam of middle ladle of the present utility model arranges especially 2 pod apertures and is symmetrical arranged, be positioned at 1/4～3/8 place, dam longitudinal centre line left and right, and be positioned at 1/8～1/4 place, cross central line top, molten steel in tundish be can effectively solve and underflow and molten steel temperature lamination problem pasted, evenly liquid steel temperature and the composition in tundish, promoted that in the molten steel, the floating of field trash is got rid of, improved slab quality.
2, tundish water mould test and application facts have proved, adopt continuous casting slag blocking dam of middle ladle of the present utility model, changed molten steel by direction and flow velocity after pod apertures, make the molten steel stagnation time in tundish improve on year-on-year basis more than 12%, the dead band ratio reduces more than 40% on year-on-year basis, and the molten steel temperature lamination disappears substantially.Simultaneously, tundish reduces 50% more than annotating on year-on-year basis, has solved tundish the technical barrier that tundish after dam increases more than annotating is set.
The utility model is successful Application on Laiwu steel enterprise silver mountain shaped steel Co., Ltd steel mill Wide and Thick Slab plate continuous casting machine tundish, tundish water mould test and application facts have proved, comparing the molten steel stagnation time in tundish with the dam of the equal geomery of prior art atresia or straight hole improves more than 14% on year-on-year basis, the dead band ratio reduces to 5～6% by 12～14%, reduce on year-on-year basis approximately 54%, the dead band of pouring area and molten steel temperature lamination disappear substantially.Tundish is annotated and remainingly to be reduced to 3～3.5 tons by 7～8 tons before application, reduce on year-on-year basis approximately 58%, has solved tundish the technical barrier that tundish after dam increases more than annotating is set.
The accompanying drawing explanation
Fig. 1 is dam structural representation of the present utility model.Wherein A is the dam front view, and B is the dam sectional side view.
Fig. 2 is the mounting process schematic diagram of dam of the present utility model.
In figure, 1. dam body; 2. pod apertures; 3. suspension ring; 4. coating; 5. liner in dundish; 6. tundish permanent liner.
The specific embodiment
Following examples are that the preparation technology to inventing further illustrates, but the utility model is not limited to this.Percentage in embodiment all is weight percentage.
Embodiment 1:
The continuous casting slag blocking dam of middle ladle, structure as shown in Figure 1, its vertical section is trapezoidal, body 1, pod apertures 2 and suspension ring 3 by dam form, two pod apertures 2 are symmetrical arranged with respect to dam body longitudinal centre line, and the pod apertures center of circle lays respectively at longitudinal centre line left and right 3/8 place, i.e. n=3/8*m, and the pod apertures center of circle is positioned at dam body cross central line top 1/4 place, i.e. h=1/4*H.Two " ∩ " suspension ring 3 are positioned at each 1/4 place, left and right, body top of dam, and the height H of dam is 350mm, and pushing off the slag dam thickness L is 180mm.
Described continuous casting slag blocking dam of middle ladle, the positive pitch β of pod apertures 2 is 18 °, and aperture d is 90mm, and dam body 1 adopts prefabricated component, by the cast of magnesium aluminate spinel matter castable, is formed.
The described matter of the magnesia spinel for continuous casting slag blocking dam of middle ladle castable, by following material, formed by weight percentage: the highly-purity magnesite 18% of 10～5mm granularity, the highly-purity magnesite 22% of 3mm<=granularity<5mm granularity, the highly-purity magnesite 17% of 1mm<=granularity<3mm, 0.074mm the highly-purity magnesite 15% of<granularity<1mm, 200 purpose fused magnesite fine powders 16.3%, 325 purpose silicon powders 4.5%, 325 purpose aluminum-spinel micro mists 6.0%, sodium phosphate trimer 0.3%, calgon 0.25%, explosion-proof fiber 0.15%, refractory steel fiber 0.5%, all be weight percentage.
Described continuous casting slag blocking dam of middle ladle the preparation method, comprise the following steps:
1) by after the component material weighing of the described matter of the magnesia spinel for continuous casting slag blocking dam of middle ladle castable, add in batch mixer and be dry mixed 2 minutes, add the water of material gross weight 4.5%, wet mixing 4 minutes, mix;
2) the magnesia spinel matter castable mixed is put into to loose tool, disposable reinforced height 100～120mm, the limit vibrating head vibration moulding of feeding in raw material of this back, while emerging without large bubble, 2 suspension ring are inserted in the castable at each 1/4 place, left and right, gear slag body top, dam, insertion depth e is 100～120mm.The green compact of dam prefabricated component complete;
3) maintenance 1 day under the environment temperature of 15～25 ℃; Then baking stage by stage: heat up with 10 ℃/h programming rate from 25 ℃, be warming up to 135 ℃, insulation 12h; Be warming up to 240 ℃ with 10 ℃/h programming rate again, insulation 8h; Be warming up to 375 ℃ from 240 ℃ with 15 ℃/h speed again, insulation 8h.Truce is naturally cooling, cool time 12h, dam completes.
The installation of described continuous casting slag blocking dam of middle ladle: as shown in Figure 2, by suspension ring 3, with driving lifting dam body 1, the degree of depth a that tundish underwrite lining work 5 is imbedded on the base of dam body is 15mm.Reality is smeared with magnesia coating 4 in gap between dam body 1 and liner in dundish 5, and dam installs.
The continuous casting slag blocking dam of middle ladle of the present embodiment, on Laiwu steel enterprise silver mountain shaped steel Co., Ltd steel mill Wide and Thick Slab plate continuous casting machine tundish, apply, tundish water mould test and application facts have proved, the molten steel stagnation time in tundish of comparing with the dam of the equal geomery of straight hole was increased to 65 seconds by 57 seconds, improve on year-on-year basis 14%, the dead band ratio reduces to 5.7% by 12.5%, reduces on year-on-year basis 54%, and the dead band of pouring area and molten steel temperature lamination disappear substantially.Reduce to 3.1 tons by 7.4 tons before application more than the tundish notes, reduce on year-on-year basis 58%.
Described two pod apertures centers of circle lay respectively at 1/4 place, longitudinal centre line left and right, i.e. n=1/4*m, and the pod apertures center of circle is positioned at dam body cross central line top 1/8 place, i.e. h=1/8*H.The height H of dam body 1 is 300mm, and the thickness L of dam body 1 is 160mm, and the positive pitch β of pod apertures 2 is 15 °, and aperture d is 70mm.
During the installation of described continuous casting slag blocking dam of middle ladle, to imbed the degree of depth a of tundish underwrite lining work 5 be 25mm on the base of dam body 1.
Claims (5)
1. a continuous casting slag blocking dam of middle ladle, its vertical section is trapezoidal, by dam body, pod apertures and suspension ring, formed, it is characterized in that pod apertures is two, two pod apertures are symmetrical arranged with respect to dam body longitudinal centre line, the pod apertures center of circle lays respectively at 1/4～3/8 place, about longitudinal centre line, and the pod apertures center of circle is positioned at 1/8～1/4 place, dam body cross central line top, and the axial line positive pitch β of pod apertures is 15 °～20 °.
2. continuous casting slag blocking dam of middle ladle as claimed in claim 1, is characterized in that dam body height H is 250～400mm, and dam body thickness L is 120～200mm.
3. continuous casting slag blocking dam of middle ladle as claimed in claim 1, the axial line positive pitch β that it is characterized in that pod apertures is 15 °～18 °, aperture d is 60～120mm.
4. continuous casting slag blocking dam of middle ladle as claimed in claim 1, the height H that it is characterized in that described dam body is 300～350mm, and the thickness L of dam body is 160～180mm, and the aperture d of pod apertures is 70～90mm.
5. continuous casting slag blocking dam of middle ladle as claimed in claim 1, is characterized in that left and right each 1/4 place, dam body top arranges two suspension ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320387538 CN203343422U (en) | 2013-07-01 | 2013-07-01 | Continuous casting tundish slag stop dam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320387538 CN203343422U (en) | 2013-07-01 | 2013-07-01 | Continuous casting tundish slag stop dam |
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| CN203343422U true CN203343422U (en) | 2013-12-18 |
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| CN 201320387538 Expired - Fee Related CN203343422U (en) | 2013-07-01 | 2013-07-01 | Continuous casting tundish slag stop dam |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103302259A (en) * | 2013-07-01 | 2013-09-18 | 莱芜钢铁集团有限公司 | Continuous-casting tundish slag stopping dam and manufacturing method thereof |
| CN106111961A (en) * | 2016-08-30 | 2016-11-16 | 山东钢铁股份有限公司 | A kind of continuous casting tundish and dam thereof |
| CN111136252A (en) * | 2019-12-30 | 2020-05-12 | 山东钢铁集团日照有限公司 | Continuous casting tundish slag dam |
-
2013
- 2013-07-01 CN CN 201320387538 patent/CN203343422U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103302259A (en) * | 2013-07-01 | 2013-09-18 | 莱芜钢铁集团有限公司 | Continuous-casting tundish slag stopping dam and manufacturing method thereof |
| CN106111961A (en) * | 2016-08-30 | 2016-11-16 | 山东钢铁股份有限公司 | A kind of continuous casting tundish and dam thereof |
| CN111136252A (en) * | 2019-12-30 | 2020-05-12 | 山东钢铁集团日照有限公司 | Continuous casting tundish slag dam |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131218 Termination date: 20150701 |
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| EXPY | Termination of patent right or utility model |