CN205110763U - A pushing off slag ball for preventing wrap swirl book sediment greatly - Google Patents
A pushing off slag ball for preventing wrap swirl book sediment greatly Download PDFInfo
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- CN205110763U CN205110763U CN201520770781.2U CN201520770781U CN205110763U CN 205110763 U CN205110763 U CN 205110763U CN 201520770781 U CN201520770781 U CN 201520770781U CN 205110763 U CN205110763 U CN 205110763U
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Abstract
The utility model discloses a pushing off slag ball for preventing wrap swirl book sediment greatly, the pushing off the slag ball constitute at the external refractory material layer of solid sphere by the solid sphere body and cladding, refractory material layer offers on the surface recess of the annular semicircle arcuation of two quadratures, the centre of sphere of pushing off the slag ball is all passed through in the cross -section of two recess positions on the pushing off the slag ball, the diameter of pushing off the slag ball is 170 -190mm, the utility model discloses can effectively eliminate the swirl of ladle and roll up the sediment, improve molten steel pureness degree, and make low cost, convenient operation.
Description
Technical field
The utility model belongs to technical field of ferrous metallurgy, is specifically related to a kind of skimming device preventing large bag vortex slag.
Background technology
In the production process of continuous casting, along with the decline of casting later stage liquid steel level, in ladle, conflux vortex can be produced by slag interface, and grow in intensity, the emulsification of slag steel will be caused, slag is flow to into tundish with steel.Conflux vortex is in container drainage process, and liquid is first vertical to decline, and when dropping to certain altitude, liquid just starts to collect to going out head piece center line, and forms recessed whirlpool on slag blanket surface, and liquid level is at this moment commonly referred to as critical and revolves height.It is indefinite to cruise in the position, recessed whirlpool of firm generation, and now desulphurization starts fuzzy, and slag particle starts emulsification enters in molten steel, but now slag can not be made to flow to water inlet with steel because position, recessed whirlpool is higher.Along with the further decline of liquid level, recessed whirlpool is more and more obvious, and swirl velocity is also increasing, until the through mouth of a river, liquid level is at this moment called through height, and now a large amount of slags enters the mouth of a river.When liquid level drops to certain altitude, originally to the fluid particle going out head piece center line and conflux, because the effect of centrifugal force produces tangential velocity (angular speed), make its movement locus more and more Off-Radial and rotational flow developed into around center line, until finally develop into have strong swabbing action through go out the funnel-form vortex of head piece, cause whirlpool core volume gas or slag and under.Ladle vortex slag brings larger harm, mainly contains:
worsen the opourability of molten steel, make nozzle blocking, casting can not normally be carried out; (2) cause the alloying element in molten steel to be oxidized, and produce the degree of purity that field trash affects molten steel; (3) in strand, dissolved aluminum content declines, tundish and long nozzle Eroded; (4) large cinder inclusion enters tundish and causes slag in tundish to gather, and causes harmful effect to casting process; (5) tundish cleaning work amount increases.In routine is produced, installation infrared Lower proterozoic group device near the ladle bottom mouth of a river usually, when entering the quantity of slag in molten steel stream and accounting for certain proportion, close slide gate nozzle in advance, to reduce the lower quantity of slag, but the method can make molten steel residual too much in ladle, reduces recovery rate of iron.Domestic disclosed patent document has CN101774014A, CN201755636U, CN2471449, CN2262967, CN2565566, CN201728365U etc., is from reducing the critical altitude incision producing conflux vortex, reducing the lower quantity of slag mostly.Current existing pushing off the slag technology mainly comprise following several 1, use band to suppress the skimming device of eddy current function; 2, eddy current is disturbed at tapping hole by blowing; 3, employing keeps away the pushing off the slag of slag cover method; 4, mop is used.What above technology had brings certain difficulty to current technology, and some apparatus structures are complicated, and cost of manufacture is high, and service life can not ensure, thus, all not fully up to expectations.
Utility model content
The utility model provides a kind ofly effectively can eliminate the whirlpool slag of ladle for preventing the skimming ball of large bag vortex slag, improve Molten Steel Cleanliness, and cost of manufacture is cheap, easy to operate.
In order to solve the problem, the technical solution adopted in the present invention is such, a kind of for preventing the skimming ball of large bag vortex slag, described skimming ball is made up of solid sphere and the refractory masses be coated on outside solid sphere, refractory masses surface offers the semicircle arcuation groove of two orthogonal annulars, on skimming ball, the cross section of two groove positions is all through the centre of sphere of skimming ball, and the diameter of skimming ball is 170-190mm.
Preferably, described solid sphere is iron ball or steel ball.
Preferably, the diameter of described solid sphere is 140-160mm; Further preferably, the diameter of described solid sphere is 150mm.
Preferably, the thickness of refractory masses is 28-35mm; Further preferably, the thickness of refractory masses is 30mm.
The radius of described semicircle arcuation groove is 20-25mm.
The utility model additionally provides a kind of application of above-mentioned skimming ball, for preventing large bag vortex slag.
Beneficial effect:
Before large Baogang platform waterborne, directly over artificial throwing to ladle nozzle, along with the carrying out of continuous casting process, ladle liquid level declines gradually, slag blanket surface starts to form recessed whirlpool, when liquid level drops to certain altitude, originally to the fluid particle going out head piece center line and conflux, because the effect of centrifugal force produces tangential velocity (angular speed), make its movement locus more and more Off-Radial and rotational flow developed into around steel flow export center line, at this moment skimming ball also can move to directly over whirlpool because of this rotary motion gradually, because whirlpool diameter is little compared with skimming ball, skimming ball is attracted to the center of whirlpool the most at last, inhibit have strong swabbing action through go out the funnel-form vortex of head piece, prevent whirlpool core volume gas, slag, in addition, refractory masses surface offers the groove of the semicircle arcuation of two orthogonal annulars, avoid cast latter stage due to large bag liquid level lower, skimming ball may block the situation at the mouth of a river, make molten steel can flow into the mouth of a river along the groove when slag ball latter stage in cast, when the later stage, slag mixed out, stop cast again, thus play control slag, improve recovery rate of iron, the object of improving the quality of products.
On the whole, the utility model is adsorbed by the whirlpool of casting process by skimming ball, effectively prevent the whirlpool slag in casting process, also ensure that simultaneously and pour into a mould latter stage when ensureing that molten steel waters clean as far as possible, reduce bale slag-blanking, also solve the series of problems and harm that bring because of ladle whirlpool slag simultaneously; In addition, cost of manufacture is cheap, easy to operate.
Accompanying drawing explanation
Fig. 1 is the utility model sectional view;
Fig. 2 is front view of the present utility model.
Detailed description of the invention
In order to deepen understanding of the present utility model, below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, and this embodiment, only for explaining the utility model, does not form the restriction to the utility model protection domain.
embodiment 1
See Fig. 1 and Fig. 2, a kind of for preventing the skimming ball of large bag vortex slag, the diameter of skimming ball is 180mm, described skimming ball is made up of solid sphere 2 and the refractory masses 1 be coated on outside solid sphere, solid sphere 2 is iron ball, the diameter of iron ball is 150mm, refractory masses 1 by refractory material as alumina refractory cement be cast in iron ball outer surface formed, the thickness of refractory masses 1 is 30mm, refractory masses 1 surface offers the semicircle arcuation groove 3 of two orthogonal annulars, on skimming ball, the cross section of two groove positions is all through the centre of sphere of skimming ball, the radius of semicircle arcuation groove 3 is 20-25mm, after measured, the density of skimming ball is 5.2g/cm
3.
embodiment 2
Structure is identical with enforcement 1, unlike, the diameter of skimming ball is 170mm, and solid sphere 2 is steel ball, and the diameter of solid sphere 2 is 140mm, and the thickness of refractory masses 1 is 30mm, and after measured, the density of skimming ball is 4.8g/cm
3.
Before large Baogang platform waterborne, skimming ball described in enforcement 1 or 2 is manually thrown to ladle nozzle, along with the carrying out of continuous casting process, ladle liquid level declines gradually, slag blanket surface starts to form recessed whirlpool, skimming ball can because produce whirlpool rotary motion move to gradually directly over whirlpool, because whirlpool diameter is little compared with skimming ball, the density of skimming ball is 4.5g/cm3-5.5g/cm3 simultaneously, between molten steel between ladle top slag, ensure that skimming ball is attracted to the center of whirlpool the most at last, thus inhibit ladle top slag to be involved in molten steel by whirlpool; Cast latter stage large bag be poured into latter stage, because skimming ball will drop on above the mouth of a river, now molten steel continues to flow into the mouth of a river along skimming ball surface groove, stop when the later stage, slag mixed out pour into a mould, until ladle roll off the production line turn over slag time, skimming ball is ploughed under in slag ladle in the lump.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (7)
1. one kind for preventing the skimming ball of large bag vortex slag, it is characterized in that, described skimming ball is made up of solid sphere and the refractory masses be coated on outside solid sphere, refractory masses surface offers the semicircle arcuation groove of two orthogonal annulars, on skimming ball, the cross section of two groove positions is all through the centre of sphere of skimming ball, and the diameter of skimming ball is 170-190mm.
2. according to claim 1ly a kind ofly to it is characterized in that for preventing the skimming ball of large bag vortex slag, described solid sphere is iron ball or steel ball.
3. a kind of according to any claim of claim 1 or 2 is characterized in that for preventing the skimming ball of large bag vortex slag, and the diameter of described solid sphere is 140-160mm.
4. according to claim 3ly a kind ofly to it is characterized in that for preventing the skimming ball of large bag vortex slag, the diameter of described solid sphere is 150mm.
5. according to claim 1ly a kind ofly to it is characterized in that for preventing the skimming ball of large bag vortex slag, the thickness of refractory masses is 28-35mm.
6. according to claim 5ly a kind ofly to it is characterized in that for preventing the skimming ball of large bag vortex slag, the thickness of refractory masses is 30mm.
7. according to claim 1ly a kind ofly to it is characterized in that for preventing the skimming ball of large bag vortex slag, the radius of described semicircle arcuation groove is 20-25mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520770781.2U CN205110763U (en) | 2015-09-30 | 2015-09-30 | A pushing off slag ball for preventing wrap swirl book sediment greatly |
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| CN201520770781.2U CN205110763U (en) | 2015-09-30 | 2015-09-30 | A pushing off slag ball for preventing wrap swirl book sediment greatly |
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| CN205110763U true CN205110763U (en) | 2016-03-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105215342A (en) * | 2015-09-30 | 2016-01-06 | 江苏永钢集团有限公司 | A kind of for preventing the skimming ball of large bag vortex slag |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105215342A (en) * | 2015-09-30 | 2016-01-06 | 江苏永钢集团有限公司 | A kind of for preventing the skimming ball of large bag vortex slag |
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