CN217318445U

CN217318445U - Equipment for covering continuous casting tundish with box type tundish

Info

Publication number: CN217318445U
Application number: CN202220289608.0U
Authority: CN
Inventors: 贾明贻; 蒋毅; 苏庆林; 杨涛; 汪峰; 徐志勇
Original assignee: Shandong Laigang Yongfeng Steel and Iron Co Ltd
Current assignee: Shandong Laigang Yongfeng Steel and Iron Co Ltd
Priority date: 2022-02-14
Filing date: 2022-02-14
Publication date: 2022-08-30
Anticipated expiration: 2032-02-14

Abstract

The utility model discloses a device for covering a box-type tundish on a continuous casting tundish, which comprises a box body, a refractory castable, auxiliary holes, lifting lugs and grabbing nails, wherein the box body comprises a top plate, side plates and rib plates; the improved pouring box is characterized in that a ladle nozzle sleeve is arranged on the box body, a middle cover is arranged in the middle of the top of the box body, a left cover is arranged on the left side of the middle cover, and a right cover is arranged on the right side of the middle cover. The utility model discloses increased the crooked resistance of ladle cover in high temperature environment, improved the high temperature resistance of ladle cover and scaling loss performance and bendability performance, shape stability can be good, processing technology is simple, the personnel selection is few, the processing degree of difficulty and cost are reduced, single weight has been reduced, the middle tank car top bears the load, certain heat preservation effect has been played to middle package casting operation, ladle cover surface temperature is reduced to 150 ℃ by 450 ℃, calorific loss has been reduced, the addition of carbonization rice husk and heat preservation covering agent has been reduced.

Description

Equipment for covering continuous casting tundish with box type tundish

Technical Field

The utility model relates to a metallurgical conticaster middle package casting technical field, more specifically say, in particular to box formula middle package lid is at equipment of package in the middle of continuous casting.

Background

In the process of casting molten steel by a continuous casting machine, tundish equipment is special equipment for molten steel storage, steady flow, shunt and purification, the temperature of the molten steel is generally controlled between 1420-. The tank cover structure used before is a G35 type steel casting with the thickness of 100mm and with raised rib plates on two sides, 4 baffle trunnions arranged at the positions of peripheral vertical surfaces, although Mo element is added before the ladle cover is processed and cast to increase the high-temperature creep resistance and oxidation resistance, a plurality of problems still exist in the using process, and certain influence is caused on the casting production:

a. the heat conduction coefficient of the cast ladle cover is high, the temperature of the upper surface of the ladle cover is generally more than 450 ℃, in order to ensure the casting temperature of molten steel, on one hand, the outlet temperature of the molten steel is increased, and on the other hand, a large amount of carbonized rice hulls and heat preservation covering agents are added on the surface of the molten steel in the tundish, so that the casting cost of the molten steel is increased, and the casting stopping risk of the molten steel caused by temperature drop is increased;

b. in the process of selecting materials and casting the ladle cover, selecting alloy steel containing MO elements and casting ribbed plates on the upper surface and the lower surface, and other measures for preventing high-temperature oxidation and deformation, improving the creep resistance and the oxidation resistance of the ladle cover, wherein the casting temperature of molten steel is over 1425 ℃, the temperature far exceeds the upper line limit temperature of the ladle cover, the ladle cover is continuously baked and splashed and eroded by high-temperature molten steel in the use process at the casting area of a ladle nozzle and the positions of slag blocking walls on two sides, burning-out big holes are respectively formed at the positions, the ladle cover is forced to be off-line and scrapped within a short month, the service life is short, 11.8 ten thousand yuan is required for purchasing one ladle cover, and the production cost consumption is high;

c. the temperature of the upper surface and the lower surface of the ladle cover has larger temperature difference, the ladle cover has serious warping phenomenon in the thickness direction, heat can be greatly dissipated to the surrounding environment through warped gaps and burnt holes in the baking and casting processes, the baking and casting heat preservation is difficult to ensure, and certain heat energy cost is increased;

d. the lug is behind phi 80mm round steel end processing baffle in casting the be-between body from lid periphery, because the be-between thickness only is 150mm, the lug casting appears to incline or melt not firm phenomenon very easily in the be-between casting process, the be-between back is covered to the be-between, because the be-between ear is too near from the distance of irritating, the degree of difficulty of plucking and hanging rings has been increased, this kind of structural design does not have the anticreep function, the easy slippage phenomenon of rings in hoisting process, there is the risk of falling.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a box body type tundish cover is at equipment of package in the middle of the continuous casting.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the equipment for covering the continuous casting tundish with the box type tundish comprises a box body, a refractory castable, an auxiliary hole, a lifting lug and a grabbing nail, wherein the box body comprises a top plate, side plates and a rib plate;

the improved pouring box is characterized in that a ladle nozzle sleeve is arranged on the box body, a middle cover is arranged in the middle of the top of the box body, a left cover is arranged on the left side of the middle cover, and a right cover is arranged on the right side of the middle cover.

Preferably, the webs comprise a plurality of longitudinal webs and a plurality of transverse webs.

Preferably, the auxiliary holes include a plurality of ventilation holes, an inspection hole, and a baking hole.

Preferably, the top of well lid, left side lid and right side lid all is equipped with two lugs, the inside cover of lug is equipped with the lifting hook, hoists the lug through the lifting hook.

Preferably, the interior of the box body is provided with a plurality of heightened side plates, the grapple is in a V-shaped structure, and the distance from the top of the grapple to the upper edge of the box body is 40-50 mm.

Preferably, the thickness of the top plate is not less than 20mm, the thickness of the side plate is not less than 30mm, and the width is not less than 340 mm.

Preferably, the diameter of the inspection hole is not less than 300mm, the inspection hole is of a circular structure, and the baking hole is of a rectangular structure.

Compared with the prior art, the utility model has the advantages of:

the high-alumina high-temperature resistant castable is cast in a box body serving as a carrier, the refractory material is fixed by a high-temperature resistant metal claw nail, the refractory material has low heat conduction performance, a high-temperature steel water heat source is effectively isolated from a steel plate shell of the ladle cover, the temperature of the upper surface of the ladle cover is reduced from 450 ℃ to 150 ℃, the temperature difference of the steel plate of the ladle cover is reduced, the deformation phenomenon of the ladle cover is eliminated, the heat loss of molten steel in the casting process is reduced, the casting stop risk caused by the temperature drop of the molten steel is eliminated, a large amount of cost consumption of a heat-insulating covering agent is saved, on the aspect size design, a middle cover is lengthened by 1800mm on the basis of an original cover and spans the position of a slag blocking wall, the refractory castable replaces steel at the position, the edge of the ladle cover can effectively avoid the overheating creep phenomenon caused by the edge of the ladle cover when the retaining wall overflows, and the special heightening and thickening design of the steel plates at two ends of the ladle cover, the service life of the ladle cover is prolonged from 1 month to 3 months, and the reasonable matching of the refractory castable and the steel structure not only improves the heat-insulating property of the ladle cover, but also reduces the cost consumption caused by frequent damage of the ladle cover; the hoisting mode that arranges rings and trunnion collocation along the ladle cover is changed into ladle cover top welding hole and insurance lifting hook complex safe hoisting mode, and the unhooking phenomenon can not appear in the hoisting process, has eliminated rings slippage phenomenon before, reduces the risk of falling.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is a cross-sectional view of the present invention;

fig. 4 is a front view structural view of the staple.

In the figure: the device comprises a middle cover 1, a left cover 2, a right cover 3, a lifting hook 4, a lifting lug 5, a ladle nozzle sleeve 6, vent holes 7, longitudinal rib plates 8, transverse rib plates 9, gripping nails 10, refractory castable 11, heightened side plates 12, a top plate 13, side plates 14, inspection holes 15 and baking holes 16.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention can be more clearly and clearly defined.

Referring to fig. 1-4, the utility model provides a device for covering a continuous casting tundish with a box-type tundish, which comprises a box body, a refractory castable 11, auxiliary holes, lifting lugs 5 and grabbing nails 10, wherein the box body comprises a top plate 13, side plates 14 and rib plates;

be equipped with bale mouth of a river sleeve pipe 6 on the box, be equipped with well lid 1 in the middle of the top of box 1, the left side of well lid 1 is equipped with left lid 2, and the right side of well lid 1 is equipped with right lid 3.

As shown in fig. 2, the webs include a plurality of longitudinal webs 8 and a plurality of transverse webs 9.

As shown in fig. 2, the auxiliary holes include a plurality of airing holes 7, an inspection hole 15, and a baking hole 16.

As shown in fig. 2, the top of the middle cover 1, the top of the left cover 2 and the top of the right cover 3 are provided with two lifting lugs 5, the lifting hooks 4 are sleeved inside the lifting lugs 5, and the lifting lugs 5 are hoisted through the lifting hooks 4.

As shown in figure 3, a plurality of heightened lateral plates 12 are arranged inside the box body, the gripping nails 10 are in V-shaped structures, and the distance between the tops of the gripping nails 10 and the upper edge of the box body is 40-50 mm.

Further, the thickness of the top plate 13 is not less than 20mm, the thickness of the side plate 14 is not less than 30mm, and the width is not less than 340 mm.

Further, the diameter of the inspection hole 15 is not less than 300mm, the inspection hole 15 is of a circular structure, and the baking hole 16 is of a rectangular structure.

The detailed working principle is as follows: splicing and welding steel plates with certain thickness to manufacture an open box body, welding reinforcing rib plates with the same thickness as the box body at the top of the box body according to the size interval requirement, then uniformly processing air holes on a top plate, and welding V-shaped metal grabbing nails 10 in the box body in an unordered manner; then, mixing, humidifying and uniformly stirring the refractory casting material and the high-alumina cement according to a certain proportion, casting the mixture in a box body, uniformly compacting the mixture by using a vibrating rod, and standing and airing the compacted mixture to form a refractory casting material 11; before the on-line use, a baking device is used for controlling the temperature according to a baking curve, the moisture in the castable is thoroughly baked, so that the refractory castable 11 is firmly combined with the box body, the high-alumina high-temperature resistant castable is cast in the box body by taking the box body as a carrier, the refractory material is fixed by a high-temperature resistant metal grabbing nail 10, the refractory material has low heat conduction performance, the high-temperature steel water heat source is effectively isolated from the steel plate shell of the ladle cover, the temperature of the upper surface of the ladle cover is reduced from 450 ℃ to 150 ℃, the temperature difference of the ladle cover steel plate is reduced, the deformation phenomenon of the ladle cover is eliminated, the heat loss of molten steel in the casting process is reduced, the casting stop risk caused by the temperature drop of the molten steel is eliminated, a large amount of heat-insulation covering agent cost consumption is also saved, on the design of the external shape dimension, the middle cover is lengthened by 1800mm on the basis of the original cover, spans the position of a slag blocking wall, the refractory castable replaces steel at the position, the edge of the ladle cover can effectively avoid the phenomenon of overheating creep deformation caused by overflow of a retaining wall, and the special heightening and thickening design of steel plates at two ends of the ladle cover prolongs the service life of the ladle cover from 1 month to 3 months; the hoisting mode that arranges rings and trunnion collocation along the ladle cover is changed into ladle cover top welding hole and insurance lifting hook complex safe hoisting mode, and the unhooking phenomenon can not appear in the hoisting process, has eliminated rings slippage phenomenon before, reduces the risk of falling.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, various changes and modifications can be made by the owner within the scope of the appended claims, as long as the protection scope of the invention is not beyond the protection scope of the claims.

Claims

1. The equipment for covering the continuous casting tundish with the box body type tundish is characterized by comprising a box body, a refractory castable, auxiliary holes, lifting lugs and grabbing nails, wherein the box body comprises a top plate, side plates and rib plates;

2. A box body type tundish apparatus according to claim 1, wherein: the webs include a plurality of longitudinal webs and a plurality of transverse webs.

3. A box body type tundish apparatus according to claim 1, wherein: the auxiliary holes comprise a plurality of air holes, inspection holes and baking holes.

4. A box body type tundish apparatus according to claim 1, wherein: the top of well lid, left side lid and right side lid all is equipped with two lugs, the inside cover of lug is equipped with the lifting hook, hoists the lug through the lifting hook.

5. A box body type tundish apparatus according to claim 1, wherein: the inside of box is equipped with a plurality of heightened curb plates, the grapple is "V" type structure, the top of grapple is 40-50mm apart from the box top edge distance.

6. A box body type tundish apparatus according to claim 1, wherein: the thickness of the top plate is not less than 20mm, the thickness of the side plate is not less than 30mm, and the width of the side plate is not less than 340 mm.

7. A box body type tundish apparatus according to claim 3, wherein: the diameter of the inspection hole is not less than 300mm, the inspection hole is of a circular structure, and the baking hole is of a rectangular structure.