CN212443240U - Framework device for ladle nozzle casting drainage sand - Google Patents
Framework device for ladle nozzle casting drainage sand Download PDFInfo
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- CN212443240U CN212443240U CN202021867880.XU CN202021867880U CN212443240U CN 212443240 U CN212443240 U CN 212443240U CN 202021867880 U CN202021867880 U CN 202021867880U CN 212443240 U CN212443240 U CN 212443240U
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Abstract
A skeleton device for casting drainage sand at a ladle nozzle comprises at least one fixed rod and a plurality of fixed pieces arranged at the upper part of the fixed rod; the fixing pieces are arranged at intervals along the fixing rod body. The framework device is placed in the drainage sand, and after the sintering layer formed, to the sintering layer layering, reduce sintering layer intensity, make the sintering layer have hard and breakable characteristics concurrently, easily broken by the ferrostatic pressure, improve the automatic casting rate at the ladle mouth of a river.
Description
Technical Field
The utility model relates to a steelmaking field, in particular to a skeleton device that is used for ladle mouth of a river to open and waters drainage sand usefulness.
Background
Before the molten steel is poured into the ladle, the residual steel and the residual slag in the ladle are required to be removed, a channel formed by the upper nozzle and the sliding plate is cleaned and checked, after necessary functional refractory materials such as the lower nozzle, the sliding plate and the like are replaced, the sliding plate is closed, and the upper nozzle is filled with the drainage sand, so that the channel is kept from being immersed by the molten steel after tapping, when the lower sliding plate is opened, the lower drainage sand is lost, the upper drainage sand is crushed and collapsed under the action of hydrostatic pressure of the molten steel, the molten steel flows out from the channel formed by the nozzle and the sliding plate, and the effect of automatic casting (automatic drainage) of the ladle is achieved.
The drainage sand that steel mill adopted at present adopts silica, chrome sand high melting point material, joins in marriage feldspar, calcite low melting point material, and the misce bene adopts and throws the material from ladle upper portion manual work, perhaps adds the mouth of a river to the ladle with the elephant trunk device, and drainage sand characteristic is difficult to adapt to production, the complicated changeable requirement of technology, causes automatic casting rate to hang down partially, and the reason is as follows:
1. the sintering performance of the diversion sand is weak, so that the thickness of a sintering layer is thin, the diversion sand is easy to be washed away by molten steel, and the molten steel enters an upper nozzle to form a steel block which is difficult to crush by the static pressure of the molten steel; the drainage sand has strong sintering performance, leads to thick sintering layer and is difficult to be crushed by the hydrostatic pressure of molten steel.
2. The temperature of the molten steel is low, so that a sintering layer of the drainage sand is thin, the drainage sand is easy to wash away by the molten steel, and the molten steel enters an upper nozzle to form a steel block which is difficult to crush by the static pressure of the molten steel; the high temperature of molten steel causes the thickness of the sintered layer of the drainage sand to be thick and difficult to crush by the static pressure of the molten steel.
3. The transfer time (the time from the moment that molten steel is injected into the steel ladle to the moment that the molten steel flows out of the steel ladle) is long, so that the sintered layer of the drainage sand is thick and is difficult to crush by the static pressure of the molten steel.
4. During refining, molten steel is stirred strongly, the drainage sand is easily washed away by the molten steel, and the molten steel enters the water feeding port to form a steel block which is difficult to crush by the static pressure of the molten steel.
Therefore, the drainage sand with single component can not meet the diversified requirements of production and process, and a prefabricated framework device needs to be developed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to design a skeleton device that is used for ladle mouth of a river to open water drainage sand usefulness, places in the drainage sand, and after the sintering layer formed, to the sintering layer layering, reduce sintering layer intensity, make the sintering layer have hard and breakable characteristics concurrently, easy being broken by the ferrostatic pressure, improve the automatic casting rate in ladle mouth of a river.
In order to achieve the above purpose, the technical scheme of the utility model is that:
a skeleton device for casting drainage sand at a ladle nozzle comprises at least one fixed rod and a plurality of fixed pieces arranged at the upper part of the fixed rod; the fixing pieces are arranged at intervals along the fixing rod body.
Preferably, the fixing pieces are serially connected to the fixing rod, and the fixing pieces are arranged in parallel or in a W-shaped arrangement in an end-to-end manner.
Preferably, the number of the fixing rods is two, the two fixing rods are arranged in parallel at a vertical interval, a plurality of fixing pieces are arranged on one side face of each fixing rod along the rod body, and the fixing pieces on the two fixing rods are arranged in parallel.
Preferably, the shape of the fixing sheet is circular, oval, rectangular, square or triangular.
Preferably, the thickness of the fixing sheet is 0.1-80 mm.
Preferably, the distance between the fixing pieces is 3-80 mm.
Preferably, the fixing sheet is formed by combining alumina, silicon oxide, silicon carbide or chromium oxide powder and an adhesive; the adhesive is a low-temperature adhesive which can be decomposed at the temperature of more than 100 ℃.
Preferably, the fixing sheet is formed by combining alumina, silicon oxide, silicon carbide or chromium oxide powder and an adhesive; the adhesive is a high-temperature adhesive which can resist the high temperature of more than 1400 ℃.
When the device is used, the device is placed in the water feeding port and the upper sliding plate, the drainage sand is added, the water feeding port is filled with the device and the drainage sand together, and the device divides the drainage sand into multiple layers.
During production, molten steel is poured into a steel ladle, the device and the convex part of the drainage sand, which is higher than the bottom plane of the steel ladle, are quickly melted and washed away, the device and the drainage sand are washed to be concave by the molten steel, the drainage sand forms a sintered layer on a molten steel interface under the high-temperature action of the molten steel and extends 0-80mm inwards, and a fixing sheet in the device is decomposed into high-melting-point powder under high temperature.
The sintering layer gradually thickens along with the time, the fixing pieces in the device which are placed in the drainage sand in advance are decomposed into a non-strength powder layer, if the thickness of the sintering layer is 50mm, and the distance between the fixing pieces is 30mm, a pulverized fixing piece is arranged in the sintering layer, the strength of the sintering layer is reduced, when the ladle sliding plate is opened, the drainage sand at the lower part runs off, the upper sintering layer is subjected to the hydrostatic pressure, is crushed and collapsed, and the molten steel flows out from a water gap.
The sintering characteristics of the drainage sand are strong and weak, the temperature of molten steel is high and low, the transfer time is short, the refining stirring strength is short, so that the thickness of a sintering layer of the drainage sand is inconsistent and is changed between 10 mm and 80mm, the distance between the fixing pieces in the device is 30mm, the drainage sand at least has a non-strength pulverization layer at the thickness of 30mm, after the sintering layer is formed, the sintering layer is layered, the strength of the sintering layer is reduced, the sintering layer has the characteristics of hardness and frangibility, and is easily crushed by the static pressure of the molten steel, so that the automatic casting rate of a ladle nozzle is improved.
The device can be pre-installed in a steel pipe and added into a ladle water feeding port along with the steel pipe.
Compared with the prior art, the utility model has the advantages of:
(1) the utility model discloses kept the resistance effect that drainage sand sintering bed washed away to the molten steel, avoided the molten steel infiltration drainage sand, utilized again the powder bed of non-intensity has been predetermine to the device, has reduced drainage sand sintering bed intensity, makes the sintering bed have hard and breakable characteristics concurrently, and easy being broken by the ferrostatic pressure, the automatic casting rate in improvement ladle mouth of a river.
(2) The drainage sand only needs to be added to a position slightly higher than the bottom plane of the steel ladle, so that the using amount of the drainage sand is saved.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of embodiment 2 of the present invention;
fig. 3 is a schematic structural diagram of embodiment 3 of the present invention;
fig. 4 is a schematic structural diagram of embodiment 4 of the present invention;
fig. 5 is a schematic view of a use state 1 of embodiment 2 of the present invention;
fig. 6 to 9 are schematic views of operation processes of the embodiment 2 of the present invention in a use state;
FIG. 10 is a schematic structural diagram of molten steel, a sintered layer and drainage sand in the initial stage of use of embodiment 2 of the present invention;
FIG. 11 is a schematic structural diagram of molten steel, a sintered layer and drainage sand in the later stage of use of the embodiment 2 of the present invention;
fig. 12 is the utility model discloses hang the schematic diagram of hand-throwing drainage sand with wire rope.
Detailed Description
Referring to fig. 1 to 4, the framework device for ladle nozzle casting drainage sand of the present invention comprises at least one fixing rod 1 and a plurality of fixing pieces 2 and 2' arranged on the upper part of the fixing rod 1; the fixing pieces 2 and 2' are arranged at intervals along the rod body of the fixing rod 1.
Referring to fig. 1 and 2, the fixing pieces 2 and 2 ' are serially connected to the fixing rod 1, and the fixing pieces 2 and 2 ' are arranged in parallel, wherein the fixing pieces 2 and 2 ' are inclined at an angle to the fixing rod 1 in fig. 2.
Referring to fig. 3, the fixing pieces 2 and 2 'are serially connected to the fixing rod 1, and the fixing pieces 2 and 2' are arranged end to end in a W shape.
Referring to fig. 4, in the present embodiment, two fixing rods 1, 1 'are provided, the two fixing rods 1, 1' are vertically spaced and arranged in parallel, a plurality of fixing pieces 2, 2 'are provided on one side surface of the fixing rods 1, 1' along the rod body, and the fixing pieces 2, 2 'on the two fixing rods 1, 1' are arranged in parallel.
Preferably, the shape of the fixing sheet is circular, oval, rectangular, square or triangular.
Preferably, the thickness of the fixing sheet is 0.1-80 mm, and the width of the fixing sheet is 1-25 mm.
Preferably, the distance between the fixing pieces is 3-80 mm.
Preferably, the fixing piece is formed by combining alumina, silicon oxide, silicon carbide, chromium oxide powder and an adhesive; the adhesive is a low-temperature adhesive which can be decomposed at the temperature of more than 100 ℃.
Preferably, the fixing piece is formed by combining alumina, silicon oxide, silicon carbide, chromium oxide powder and an adhesive; the adhesive is a high-temperature adhesive which can resist the high temperature of more than 1400 ℃.
Example 1
Referring to fig. 1, silicon carbide powder is added with low-temperature adhesive to be mixed evenly and compacted to form a fixing sheet 2, the fixing sheet 2 is dried in the air, a hole is formed in the middle of the fixing sheet 2, a fixing rod 1 penetrates through a center hole, and the fixing sheet 2 is bonded and positioned on the fixing rod 1 through glue.
Referring to fig. 5, the framework device of the present invention is installed in a steel tube 60 with an open end, filled with drainage sand 100, and the open end is sealed with a plastic cover.
Referring to fig. 6-9, the ladle 10 is laid horizontally, the lower slide plate 20 is pulled open, the lower slide plate 20 is communicated with the upper slide plate 30, and the steel pipe 60 of the framework device is inserted into the upper water gap 50 from the lower water gap 40 through the lower slide plate 20 and the upper slide plate 30, the lower slide plate 20 is closed, the ladle 10 is vertical, and the drainage sand 100 is added from the upper part by hand or by a chute device, and is in the shape of an oblate cone protruding upwards.
Referring to fig. 10, after molten steel pours into ladle 10, drainage sand 100 and molten steel contact part, the rapid sintering forms sintering layer 101, and sintering layer 101 is the nonmetal compact layer that has certain thickness, intensity, and the upper surface is the arc, resists the molten steel and erodees to prevent the molten steel to form firm slag mixture to the inside invasion of drainage sand, the steel pipe the framework device salient is washed away by the molten steel, the stationary blade 2 pulverization of framework device in drainage sand 100.
Referring to fig. 11, as time goes on, the sintered layer 101 of the drainage sand is washed to be concave by molten steel, the sintered layer 101 moves downwards, the thickness of the sintered layer is increased, the strength is enhanced, the fixing pieces 2 of the framework device in the drainage sand 100 are pulverized one by one, the spacing distance of the fixing pieces 2 is smaller than the thickness of the sintered layer 101, and at least one pulverized layer of the fixing pieces 2 is arranged in the sintered layer 101. Due to the existence of the powdering layer, the sintering layer 101 is cut into a plurality of small blocks, the structural strength of the sintering layer 101 is reduced, when the lower sliding plate 20 is pulled, the middle hole of the lower sliding plate 20 is communicated with the middle hole of the upper sliding plate 30, the drainage sand 100 flows out from the through holes, the sintering layer 101 loses support, the molten steel crushes the sintering layer 101, the molten steel flows out of the through holes of the upper water gap 50 and the lower water gap 40, and the ladle is successfully poured.
Adopt skeleton equipment, drainage sand 100 characteristic adjustment to faster, stronger sintering property, molten steel scouring resistance is stronger, it is littleer to erode the recessed degree that causes, always there is the pulverization layer of stationary blade 2 in sintering layer 101, cut apart firm, hard sintering layer 101 into a plurality of fritters, reduce sintering layer 101's structural strength, need not consider that the sintering layer 101 thickness that drainage sand 100 too strong sintering property caused is too thick, cause the condition that molten steel static pressure pressed the breakage. The framework device ensures that the sintering layer 101 has the characteristics of hardness and frangibility, so that the ladle casting (automatic drainage) rate is greatly improved.
Referring to fig. 12, a mechanical tilting mechanism or crane can be used to erect the ladle 10, and the ladle is pulled by a wire rope from above to add the framework device of the present invention, and then the ladle is manually thrown or a chute is added with the stuffing sand.
Example 2
The fixing piece 2 is made of silicon carbide powder, high-temperature adhesive is used for manufacturing fixing pieces with high temperature resistance of more than 1400 ℃, the fixing piece 2 is fixed on the fixing rod 1 to form a framework device, the framework device is placed into the water inlet 20, and drainage sand 100, namely drainage sand with weak sintering performance or common sea sand, is added.
The above is only a preferred embodiment of the present invention; the scope of the present invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by replacing or changing the technical solution and the improvement concept of the present invention with equivalents and modifications within the technical scope of the present invention.
Claims (10)
1. The utility model provides a skeleton device that is used for ladle mouth of a river to open and waters drainage sand usefulness which characterized in that: comprises at least one fixed rod and a plurality of fixed sheets arranged on the upper part of the fixed rod; the fixing pieces are arranged at intervals along the fixing rod body.
2. The framework device for the ladle nozzle casting of the drain sand as claimed in claim 1, wherein: the fixing pieces are serially connected on the fixing rods, and are arranged in parallel or in a W-shaped manner in an end-to-end mode.
3. The framework device for the ladle nozzle casting of the drain sand as claimed in claim 1, wherein: the fixing rods are arranged in two, the two fixing rods are arranged in parallel at a vertical interval, a plurality of fixing pieces are arranged on one side face of each fixing rod along the rod body, and the fixing pieces on the two fixing rods are arranged in parallel.
4. The framework device for ladle nozzle casting of the drain sand as claimed in claim 1, 2 or 3, wherein: the shape of the fixing sheet is circular, oval, rectangular, square or triangular.
5. The framework device for ladle nozzle casting of the drain sand as claimed in claim 1, 2 or 3, wherein: the thickness of the fixing sheet is 0.1-80 mm.
6. The framework device for the ladle nozzle casting of the drain sand as claimed in claim 4, wherein: the thickness of the fixing sheet is 0.1-80 mm.
7. The framework device for ladle nozzle casting of the drain sand as claimed in claim 1, 2 or 3, wherein: the distance between the fixing pieces is 3-80 mm.
8. The framework device for the ladle nozzle casting of the drain sand as claimed in claim 4, wherein: the distance between the fixing pieces is 3-80 mm.
9. The framework device for the ladle nozzle casting of the drain sand as claimed in claim 5, wherein: the distance between the fixing pieces is 3-80 mm.
10. The framework device for the ladle nozzle casting of the drain sand as claimed in claim 6, wherein: the distance between the fixing pieces is 3-80 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021867880.XU CN212443240U (en) | 2020-09-01 | 2020-09-01 | Framework device for ladle nozzle casting drainage sand |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021867880.XU CN212443240U (en) | 2020-09-01 | 2020-09-01 | Framework device for ladle nozzle casting drainage sand |
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| CN212443240U true CN212443240U (en) | 2021-02-02 |
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| CN202021867880.XU Active CN212443240U (en) | 2020-09-01 | 2020-09-01 | Framework device for ladle nozzle casting drainage sand |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114042904A (en) * | 2021-12-01 | 2022-02-15 | 山东钢铁集团日照有限公司 | Method for improving ladle self-opening rate |
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2020
- 2020-09-01 CN CN202021867880.XU patent/CN212443240U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114042904A (en) * | 2021-12-01 | 2022-02-15 | 山东钢铁集团日照有限公司 | Method for improving ladle self-opening rate |
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