CN217474840U - Antiseized sediment long-life ladle is along structure - Google Patents

Antiseized sediment long-life ladle is along structure Download PDF

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Publication number
CN217474840U
CN217474840U CN202221031705.6U CN202221031705U CN217474840U CN 217474840 U CN217474840 U CN 217474840U CN 202221031705 U CN202221031705 U CN 202221031705U CN 217474840 U CN217474840 U CN 217474840U
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ladle
layer
brick
magnesia carbon
along
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CN202221031705.6U
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王志强
彭肖仟
郑吉红
王心一
雷中心
卢杰
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Wuhan Iron And Steel Group Refractory Materials Co ltd
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Wuhan Iron And Steel Group Refractory Materials Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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Abstract

The utility model relates to a slag adhesion preventing long-life ladle edge structure, including ladle shell, permanent layer castable layer and slag line brick layer that connect gradually from outside to inside, the level height of ladle shell, permanent layer castable layer and slag line brick layer reduces in proper order, slag line brick layer is vertically provided with a plurality of spill bags along the magnesia carbon brick along the circumferential direction and forms spill bag along the magnesia carbon brick layer, and each spill bag along the magnesia carbon brick height and the parallel and level of ladle shell top surface, spill bag along magnesia carbon brick and ladle shell be connected and make spill bag along magnesia carbon brick layer and slag line brick layer with permanent layer castable layer parcel including; the inner wall of the top of the ladle shell is welded with an annular brick pressing plate. The utility model discloses in, the ladle is along not adopting any pouring material, ramming mass etc. to glue the material of sediment easily, but adopts full magnesia carbon brick to build by laying bricks or stones and form, because graphite is poor with the wettability of molten steel or slag in the magnesia carbon brick, has good anti sediment and corrodes and air permeability, reduces the ladle along the probability of gluing the sediment by a wide margin.

Description

Antiseized sediment long-life ladle is along structure
Technical Field
The utility model belongs to the field of steel smelting equipment, especially, relate to an antiseized sediment long-life ladle is along structure.
Background
As an extremely important container in the steelmaking process, the ladle is mainly used for containing molten steel and a molten steel refining treatment process. Usually, the ladle edge part is cast in situ by adopting refractory castable, is built by compounding refractory bricks and refractory castable or is built by compounding refractory bricks and refractory ramming mass. In the deslagging process, the castable or ramming material on the edge of the steel ladle reacts with the molten slag to form slag, and the deslagging phenomenon can occur on the edge of the steel ladle in the past, so that the deslagging and the molten steel emptying are also affected seriously. The bonded slag-iron mixture and the ladle opening refractory material are firmly combined and infiltrate into the steel ladle opening refractory material, the manual cleaning is difficult, the slag cleaning efficiency is low, the ladle opening metal piece and the refractory material are easy to damage, and the steel-making production efficiency and the service life of the steel ladle are not facilitated. Along with the increase of the adding proportion of the scrap steel, molten metal and liquid metal are easy to splash and slag is bonded on a slag line and a ladle opening part in the refining process, the upper temperature is low, molten slag and metal mixture is easy to adhere on the ladle opening and severe erosion and damage are caused to a ladle edge, so that the ladle is often abnormally off-line due to the severe damage of the ladle edge.
In order to solve the above problems, the chinese utility model patent with application number 202120191253.7 discloses a high stability composite ladle edge structure, which has obvious slag adhesion preventing effect, but because the ladle edge brick contains the castable behind the back, still has some steel slag adhesion on the castable in operation, affects the turnover of the ladle, and the improvement is not thorough enough.
Disclosure of Invention
The utility model provides a antiseized sediment long-life ladle is along structure, its simple structure, construction easy and simple to handle not only can deal with the molten steel level and rise to the package and follow the melting loss that arouses, can effectively reduce the sediment condition of gluing that the ladle was followed moreover to reduce the number of times that the sediment was settleed along the ladle.
The utility model provides a scheme as follows of above-mentioned technical problem: a slag-adhesion-preventing long-life ladle edge structure comprises a ladle shell, a permanent layer casting material layer and a slag line brick layer which are sequentially connected from outside to inside, wherein the horizontal heights of the shell, the permanent layer casting material layer and the slag line brick layer are sequentially reduced, an annular groove is formed in the inner surface of the permanent layer casting material layer, the bottom surface of the annular groove is flush with the top surface of the slag line brick layer, a plurality of concave bags are vertically arranged on the top surface of the slag line brick layer along the circumferential direction and form a concave bag edge magnesia carbon brick layer along magnesia carbon bricks, and each concave bag is flush with the top surface of the ladle shell along the height of the magnesia carbon bricks; the concave bag forms an integrated surface along the inner surface of the magnesia carbon brick layer and the inner surface of the slag line brick layer, the concave bag extends along the lower part of the magnesia carbon brick to the permanent layer casting material layer for building to form a lower convex block and is inserted into the annular groove, the concave bag extends along the upper part of the magnesia carbon brick to the steel ladle shell for building to form an upper convex block and is connected with the steel ladle shell, so that the concave bag wraps the permanent layer casting material layer along the magnesia carbon brick layer and the slag line brick layer; the inner wall of the top of the steel ladle shell is welded with an annular brick pressing plate, an annular mounting groove is formed in the joint of the top surface of the concave ladle edge magnesia carbon brick layer and the steel ladle shell, and the annular brick pressing plate is arranged in the annular mounting groove.
Concave package is followed magnesia carbon brick and slag line brick all adopt high strength magnesia carbon brick material preparation to form, and aim at deals with the package that the molten loss that the molten steel level rose and caused effectively, and then improve life. The permanent layer castable is a high-strength wear-resistant castable with sintering temperature of 1100-1300 ℃.
Preferably, the concave pack has two sizes along the magnesia carbon brick, wherein,
the width of the first concave ladle along the magnesia carbon bricks is gradually reduced from the ladle shell to the center of the ladle (namely a is larger than b, the thickness a of the concave ladle along the upper convex block of the magnesia carbon bricks towards the ladle shell side is larger than the thickness b of the concave ladle along the magnesia carbon bricks towards the ladle center side);
the width of the second concave package along the magnesia carbon bricks is equal from the ladle shell to the ladle center (namely a is equal to b, and the thickness b of the concave package along the magnesia carbon bricks towards the ladle center side is the same as the thickness a of the concave package along the upper convex blocks of the magnesia carbon bricks towards the ladle shell side).
Preferably, the concave bag is formed by piling a first concave bag along the magnesia carbon brick layer along the circumferential direction,
or the concave bag edge magnesia carbon brick layer is formed by stacking a first concave bag edge magnesia carbon brick and a second concave bag edge magnesia carbon brick in a mixing manner along the circumferential direction, so that the door is convenient to build.
Preferably, the height of the annular brick pressing plate is 14-16mm, and the thickness M of the annular brick pressing plate is the same as the thickness M of the permanent layer castable layer.
Preferably, the depth N of the annular groove of the permanent layer castable layer is 1/2 of the thickness M of the permanent layer castable layer, the height H of the annular groove is 140mm, and the height H of the permanent layer castable layer above the annular groove is 140mm and 160 mm.
Preferably, an expansion joint is reserved between the contact surface of the magnesia carbon brick and the annular brick pressing plate along the concave bag.
Preferably, the expansion joint is L-shaped, and the width of the expansion joint is 1-2 mm.
The beneficial effects of the utility model are as follows:
1. in the technical scheme, the ladle edge is built by adopting all-magnesia carbon bricks instead of adopting any materials which are easy to stick slag, such as casting materials, ramming materials and the like. Because the graphite in the magnesia carbon brick has poor wettability with molten steel or steel slag, the magnesia carbon brick has good slag corrosion resistance and air permeability, and greatly reduces the probability of slag adhesion of the ladle edge, thereby reducing the frequency of slag removal of the ladle edge, not only reducing the probability of damage of the ladle edge due to slag removal, prolonging the service life of the ladle, reducing the waste of refractory material resources, but also saving the slag removal process, saving manpower and improving the operation rhythm of the ladle;
2. in the technical scheme, as the magnesia carbon bricks with higher strength are adopted, the using strength of the steel ladle along the normal temperature and the high temperature is improved by more than 1 time, and the melting loss caused by the condition that the steel liquid level rises to the ladle edge can be effectively coped with, so that the abnormal offline of the whole steel ladle caused by the damage of the ladle edge is avoided, the service life of the steel ladle is prolonged, and the waste of refractory material resources is reduced;
3. in the technical scheme, the ladle edge mainly adopts magnesia carbon bricks, and the ladle edge does not need to be maintained and baked for a long time in the construction process, so that a large amount of coal gas is saved, and the steel industry can be assisted to realize the carbon peak-reaching carbon neutralization target.
Drawings
The accompanying drawings, which are described herein to provide a further understanding of the invention, are included in the following description:
FIG. 1 is a structure diagram of a slag adhesion preventing long-life ladle edge in embodiment 1 of the present invention;
FIG. 2 is a top view of a structure of a slag-sticking-proof long-life ladle edge in embodiment 1 of the present invention;
FIG. 3 is a top view of a slag-sticking-proof long-life ladle edge structure in embodiment 2 of the present invention;
FIG. 4 is a partial enlarged view of a ring-shaped brick pressing plate in embodiment 1 of the present invention;
FIG. 5 is a schematic perspective view of a brick shape of a tundish magnesia carbon brick in embodiment 1 of the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1. a steel ladle shell; 2. a permanent layer casting material layer; 3. a slag line brick layer; 4. the concave edge-wrapped magnesia carbon brick; 5. annular brick pressing plates; 6. expanding the seam; 7. an upper bump; 8. a lower projection block; 9. An annular groove.
Detailed Description
The principles and features of the present invention are described below in conjunction with the accompanying fig. 1-4, the examples given are intended to illustrate the present invention and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, the utility model provides an antiseized sediment long-life ladle is along structure, including ladle shell 1, permanent layer casting bed 2 and slag line brick layer 3 that connect gradually from outside to inside, the level of ladle shell 1, permanent layer casting bed 2 and slag line brick layer 3 reduces in proper order, annular groove 9 has been seted up to permanent layer casting bed 2 inner face, the bottom surface of annular groove 9 is parallel and level with slag line brick layer 3 top surface, slag line brick layer 3 top surface is provided with a plurality of concave packages along magnesia carbon brick 4 formation concave package along magnesia carbon brick layer vertically along the circumferential direction, and every concave package is along magnesia carbon brick 4 height and ladle shell 1 top surface parallel and level; the concave ladle forms an integrated surface along the inner surface of the magnesia carbon brick layer and the inner surface of the slag line brick layer 3, the concave ladle extends along the lower part of the magnesia carbon brick 4 to the permanent layer castable layer 2 to be built to form a lower convex block 8 and is inserted into the annular groove 9, the concave ladle extends along the upper part of the magnesia carbon brick 4 to the ladle shell 1 to be built to form an upper convex block 7 and is connected with the ladle shell 1 so that the concave ladle wraps the permanent layer castable layer 2 along the magnesia carbon brick layer and the slag line brick layer 3; the welding of 1 top inner wall of ladle shell has annular pressure brick board 5, and the spill package has seted up annular mounting groove along the top surface on magnesium carbon brick layer and ladle shell 1 junction, is provided with annular pressure brick board 5 in the annular mounting groove.
The concave edge-wrapped magnesia carbon bricks 4 and the slag line brick layer 3 are both prepared from high-strength magnesia carbon bricks, and the volume density of the concave edge-wrapped magnesia carbon bricks is more than or equal to 3.10g/cm 3 The normal temperature flexural strength is more than or equal to 25MPa, the normal temperature compressive strength is more than or equal to 90MPa, the highest service temperature is more than or equal to 1600 ℃, and the high temperature flexural strength (1500 multiplied by 0.5h) is more than or equal to 16 MPa. Aims to effectively deal with the ladle edge melting loss caused by the rise of the steel liquid level and further prolong the service life.
The permanent layer casting material is a high-strength wear-resistant casting material with the sintering temperature of 1100-1300 ℃. The volume density is more than or equal to 2.80g/cm 3 The breaking strength (1300 ℃ multiplied by 3h) is more than or equal to 20MPa, and the compressive strength (1300 ℃ multiplied by 3h) is more than or equal to 110 MPa.
The concave pack edge magnesia carbon brick layer is formed by piling a first concave pack edge magnesia carbon brick 4 along the circumferential direction, and the width of the first concave pack edge magnesia carbon brick 4 is gradually reduced from the ladle shell 1 to the ladle center (namely a is more than b)
The annular brick pressing plate 5 is made of carbon steel material, the thickness of the annular brick pressing plate is 14-16mm, and the width M of the annular brick pressing plate is the same as the thickness M of the permanent layer castable layer 2.
The depth N of the annular groove 9 of the permanent layer castable layer 2 is 1/2 of the thickness M of the permanent layer castable layer 2, the height H of the annular groove 9 is 140-140 mm, and the height H of the permanent layer castable layer 2 above the annular groove 9 is 140-160 mm.
An expansion joint 6 is reserved between the contact surface of the magnesia carbon brick 4 and the annular brick pressing plate 5 of the concave bag edge.
The expansion joint 6 is L-shaped, and the width of the expansion joint is 1-2 mm.
The building steps of the anti-slag long-service-life ladle edge structure are as follows:
1) laying a slag line brick layer 3 to a permanent layer castable layer 2 and reserving a groove;
2) welding an annular brick pressing plate 5 on the slag adhering side of the ladle shell 1;
3) according to the positions of the annular groove 9 of the permanent layer castable layer 2 and the annular brick pressing plate 5, the first concave package is built above the slag line brick layer 3 along the magnesia carbon brick 4, and an expansion joint 6 is reserved between the annular brick pressing plate 5 and the concave package along the magnesia carbon brick 4. The final height of the concave ladle edge 4 is flush with the steel shell to ensure that the placement of the ladle cover is not affected.
Example 2
On the basis of the embodiment 1, another technical scheme is provided, as shown in fig. 3, as compared with the embodiment 1, the concave bag is formed by stacking a first kind of concave bag along the magnesia carbon brick layer along the magnesia carbon brick 4 and a second kind of concave bag along the magnesia carbon brick layer 4 in a mixed manner along the circumferential direction. The first concave ladle gradually decreases from the ladle shell 1 to the ladle center along the width of the magnesia carbon brick 4 (i.e. a is larger than b), and the second concave ladle is equal from the ladle shell 1 to the ladle center along the width of the magnesia carbon brick 4 (i.e. a is equal to b).
Other parts not described in detail are prior art. Although the above embodiments have been described in detail, it is only a part of the embodiments of the present invention, rather than all embodiments, and other embodiments can be obtained without inventive step according to the present embodiments.

Claims (7)

1. The utility model provides an antiseized sediment long-life ladle is along structure, includes by outer ladle shell (1), permanent layer castable layer (2) and slag line brick layer (3) that connect gradually in to, its characterized in that: the horizontal heights of the ladle shell (1), the permanent layer casting material layer (2) and the slag line brick layer (3) are sequentially reduced, an annular groove (9) is formed in the inner surface of the permanent layer casting material layer (2), the bottom surface of the annular groove (9) is flush with the top surface of the slag line brick layer (3), a plurality of concave bags are vertically arranged on the top surface of the slag line brick layer (3) along the circumferential direction and form a concave bag edge magnesia carbon brick layer along the magnesia carbon bricks (4), and each concave bag is flush with the top surface of the ladle shell (1) along the height of the magnesia carbon bricks (4); the concave ladle forms an integrated surface along the inner surface of the magnesia carbon brick layer and the inner surface of the slag line brick layer (3), the concave ladle extends along the lower part of the magnesia carbon brick (4) to the permanent layer castable layer (2) to build a lower convex block (8) and is inserted into the annular groove (9), the concave ladle extends along the upper part of the magnesia carbon brick (4) to the ladle shell (1) to build an upper convex block (7) and is connected with the ladle shell (1) to enable the concave ladle to wrap the permanent layer castable layer (2) along the magnesia carbon brick layer and the slag line brick layer (3); the steel ladle shell (1) top inner wall welding has annular brick pressing plate (5), the spill package has seted up annular mounting groove along the top surface on magnesium carbon brick layer and steel ladle shell (1) junction, be provided with annular brick pressing plate (5) in the annular mounting groove.
2. The slag-adhesion-preventing long-life ladle edge structure as claimed in claim 1, wherein the concave ladle edge magnesia carbon brick (4) has two sizes, wherein;
the width of the first concave ladle along the magnesia carbon brick (4) is gradually reduced from the ladle shell (1) to the center of the ladle, namely a is larger than b;
the second concave ladle is equal from the ladle shell (1) to the center of the ladle along the width of the magnesia carbon brick (4), namely a is equal to b.
3. The slag adhesion-preventing long-life ladle kerb structure as claimed in claim 1, wherein the concave ladle kerb layer is formed by stacking a first type of concave ladle kerb (4) along the circumferential direction,
or the concave bag edge magnesia carbon brick layer is formed by stacking a first kind of concave bag edge magnesia carbon brick (4) and a second kind of concave bag edge magnesia carbon brick (4) in a mixed mode along the circumferential direction.
4. The ladle kerb structure with the characteristics of slag adhesion prevention and long service life as claimed in claim 1 or 2, wherein the height of the annular brick pressing plate (5) is 14-16mm, and the thickness M of the annular brick pressing plate is the same as the thickness M of the permanent layer castable layer (2).
5. The ladle kerb structure with the characteristics of adhesion prevention and long service life as recited in claim 1 or 2, wherein the depth N of the annular groove (9) of the permanent layer castable layer (2) is 1/2 of the thickness M of the permanent layer castable layer (2), the height H of the annular groove (9) is 140mm, and the height H of the permanent layer castable layer (2) above the annular groove (9) is 160mm and 140 mm.
6. The ladle edge structure with the slag adhesion prevention and the long service life as claimed in claim 1 or 2, wherein an expansion joint (6) is reserved between the contact surfaces of the concave ladle edge magnesia carbon bricks (4) and the annular brick pressing plates (5).
7. The ladle edge structure with the slag adhesion prevention and the long service life as claimed in claim 6, wherein the expansion joint (6) is L-shaped and has a width of 1-2 mm.
CN202221031705.6U 2022-04-29 2022-04-29 Antiseized sediment long-life ladle is along structure Active CN217474840U (en)

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CN202221031705.6U CN217474840U (en) 2022-04-29 2022-04-29 Antiseized sediment long-life ladle is along structure

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Application Number Priority Date Filing Date Title
CN202221031705.6U CN217474840U (en) 2022-04-29 2022-04-29 Antiseized sediment long-life ladle is along structure

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