CN1023771C - Method for continuously casting 60x60 mm square steel billets - Google Patents
Method for continuously casting 60x60 mm square steel billets Download PDFInfo
- Publication number
- CN1023771C CN1023771C CN 92101305 CN92101305A CN1023771C CN 1023771 C CN1023771 C CN 1023771C CN 92101305 CN92101305 CN 92101305 CN 92101305 A CN92101305 A CN 92101305A CN 1023771 C CN1023771 C CN 1023771C
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- tundish
- brick
- nozzle brick
- crystallizer
- centering
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Abstract
The present invention relates to a method for continuously casting 60*60mm square steel billets, which adopts a nozzle brick to singly heat and adopts an optical centering instrument to center a crystallizer and the nozzle brick; thereby, the present invention overcomes the problems existing in the prior art that a tundish car and the crystallizer are centered on a track, and the centering accuracy is poor. Meanwhile, a power-frequency inductance heater is arranged at the middle in a feedback way so that the temperature of molten steel is slowly dropped, and the molten steel is emptied under the action of electromagnetic agitation.
Description
The present invention relates to cast continuously the method for 60 * 60 mm square steel billets, relate to the method that how to make tundish and crystallizer centering particularly, particularly tundish structure cooperates the method for centering, and continuous casting 60 * 60 mm square steel billets are achieved.
In the prior art, produce the continuous casting steel machine of steel billet continuously, can only produce the steel billet more than 90 * 90 millimeters, see＜continuous casting steel machine association of Chinese Metals Society shown in the 13rd page of the statistical form " China continuous casting factory present situation " of establishments in 90 years.Abroad, De Make circular-arc type continuous casting machine as Germany, though, in design, include the production of the small dimension steel billet of 70 * 70 millimeters and 90 * 90 millimeters, but because the unreasonable structure of tundish (also claiming middle cylinder), so in fact 70 * 70 millimeters steel billet can't be produced, and as for 60 * 60 millimeters steel billet, yet there are no and reports and can produce continuously.Its reason has two, the firstth, the accuracy of alignment of the crystallizer center line that the middle water containing opening brick is connected with its underpart does not reach requirement, for 60 * 60 millimeters square billets if depart from the center base shell that molten steel forms in crystallizer more than 5 millimeters the time have thick have thin, bleedout very easily during throwing is so to require be best below 3 millimeters to deviation.The secondth, molten steel stops up at the nozzle brick place easily.
The unreasonable part of the tundish structure of above-mentioned prior art is the steel casing of tundish, permanent layer, working lining (silica heat-insulating plate), fire clay, nozzle brick, brick cup is built into an integral body earlier, hang then on the hired car of centre, after reaching heating station and being heated to 1000～1200 ℃, again the centre hired car is reached the top of crystallizer, determine the centering state of nozzle brick and crystallizer according to middle hired car parking spot and exterior contour, at this moment hired car is mobile in orbit in the middle of, because it is extremely inaccurate that wheel and track cooperate, so this coarse centering, general deviation is all more than 10 millimeters, so for the steel billet of producing more than 90 * 90 millimeters, influence is little, but is to produce fully for 60 * 60 millimeters steel billet.The spy opens clear 62-38756 for another example, and tundish adopts the high-frequency heating anti-blocking method, and its shortcoming is equipment complexity, specification requirement height, and cost is also high.
The present inventor is too poor at above-mentioned prior art accuracy of alignment, can not produce the shortcoming of 60 * 60 millimeters steel billets continuously and invent a kind of method that can cast 60 * 60 millimeters steel billets continuously, it is the separately heating of nozzle brick of tundish, the tundish eddy-current heating, adopt the optics centering instrument to come the measure of the bellmouth of middle square hole of centering crystallizer and nozzle brick, the present invention elaborated below in conjunction with drawings and Examples:
Fig. 1-a is the structure sketch of tundish, wherein 1. tundish pillars, 2. electrical heating inductor, 3. heat insulation layer, 4. permanent layer, 5. layer of sand, 6. working lining (silica heat-insulating plate), 7. taper reamer, 8. brick cup, 9. location cone.Fig. 1-b is 10. nozzle bricks.
Fig. 2-b is an optics centering crystallizer sketch, wherein, and 11. tundish, 12. optics centering instruments, 13. crystallizers.
Now that the step division of centering is as follows:
1. nozzle brick is a bullet, when building tundish, it is not built, but is heated to 1000～1200 ℃ with a small-power cabinet-type electric furnace separately.
2. tundish puzzles brick cup, permanent layer, heat insulation layer when building by laying bricks or stones together, builds in by pillar, the formed rectangular frame of electrical heating inductor (50KW, 380V).
3. with the base plate of working lining (silica heat-insulating plate), bore a cylindrical hole, the aperture is littler 10 millimeters than the major part of taper nozzle brick, and its position is corresponding with the brick cup bellmouth.
4. working lining is packed in the tundish, gap location tamps with fine sand all around.
5. be the center with the brick cup taper, put a location cone, see 9 among Fig. 1, its tapering and brick cup.Nozzle brick is identical, with the reamer of an identical tapering, sees 7 among Fig. 1, and the cylindrical hole of above-mentioned base plate is hinged into bellmouth, makes hole shape become a standard bellmouth with the brick cup hole, and this hole is identical with the nozzle brick tapering.
6. when using tundish, bellmouth aligns the middle square hole of crystallizer, uses " optics centering instrument " to carry out the accurately centering of cold conditions then, sees Fig. 2 (model " light 91-550 type " Harbin Optical-Instruments Factory.）
7. when beginning to water steel, the nozzle brick that will be heated to earlier 1000～1200 ℃ is separately put in the bellmouth, and pressurization gently when making taper fit closely, is and begins to water steel.
The structure of this tundish, high-temperature molten steel can not be freezed by the nozzle brick aperture time, simultaneously molten steel is injected in the middle of the crystallizer that 60 * 60 millimeters square holes are only arranged exactly, make molten steel in crystallizer, form the uniform base shell of thin and thick, smooth throwing, unlikely bleedout.Realized the continuous casting steel machine of 60 * 60 millimeters square billets.
Advantage of the present invention is: adopt the optics centering instrument, only the interstitial hole of crystallizer and the bellmouth of nozzle brick are carried out centering, the whole tundish car that has overcome prior art is the shortcoming not high with the crystallizer accuracy of alignment in orbit, adopt simultaneously nozzle brick to be heated to separately 1000～1200 ℃, temperature meets the requirements fully. Overcome the nozzle brick blockage problem. Also be provided with frequency inductance at tundish and answer heater, because the liquid steel temperature in ladle, the tundish all descends to some extent when being poured into the later stage, utilize the electromagnetic agitation of heater, heat effect makes molten steel water light. Thereby make 60 * 60 millimeters steel billet can cast smoothly continuously success.
Claims (4)
1, a kind of 60 * 60 continuous-casting of steel billet that are used for, the centering method of the tundish and the crystallizer of electric induction heater is housed in it, it is characterized in that: tundish (11) is built by laying bricks or stones separately respectively with nozzle brick (10), the base plate of working lining is bored a cylindrical hole, the aperture is littler 10 millimeters than the major part of taper nozzle brick, and its position is corresponding with the brick cup bellmouth; Working lining is packed in the tundish, and gap location tamps with fine sand all around; With the brick cup taper is the center, put a location cone, its tapering is identical with the brick cup nozzle brick, reamer with an identical tapering is twisted into the working lining base plate one standard bellmouth and makes it identical with the nozzle brick tapering, align the middle square hole of crystallizer with the tundish bellmouth, use " optics centering instrument " to carry out cold conditions centering then.
2,, it is characterized in that nozzle brick is heated to be 1000～1200 ℃ separately according to the method for claim 1.
3,, it is characterized in that adopting the optics centering instrument of light 91-550 type according to the method for claim 1.
4,, it is characterized in that adopting frequency inductance to answer heater (50KW, 380V) according to the method for claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92101305 CN1023771C (en) | 1992-03-05 | 1992-03-05 | Method for continuously casting 60x60 mm square steel billets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92101305 CN1023771C (en) | 1992-03-05 | 1992-03-05 | Method for continuously casting 60x60 mm square steel billets |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1064230A CN1064230A (en) | 1992-09-09 |
| CN1023771C true CN1023771C (en) | 1994-02-16 |
Family
ID=4939057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92101305 Expired - Fee Related CN1023771C (en) | 1992-03-05 | 1992-03-05 | Method for continuously casting 60x60 mm square steel billets |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1023771C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103624226B (en) * | 2012-08-14 | 2015-08-26 | 宝钢特钢有限公司 | The localization method of middle water containing opening and device thereof |
| CN114799151A (en) * | 2022-06-01 | 2022-07-29 | 山东莱钢永锋钢铁有限公司 | Process method capable of realizing quick centering of tundish |
-
1992
- 1992-03-05 CN CN 92101305 patent/CN1023771C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1064230A (en) | 1992-09-09 |
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