CN214814757U

CN214814757U - High-stability composite steel ladle edge structure

Info

Publication number: CN214814757U
Application number: CN202120191253.7U
Authority: CN
Inventors: 王志强; 周辉; 彭肖仟; 雷中兴; 孙枫; 刘宇
Original assignee: Wuhan Iron And Steel Group Refractory Materials Co ltd
Current assignee: Wuhan Iron And Steel Group Refractory Materials Co ltd
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2021-11-23
Anticipated expiration: 2031-01-22

Abstract

The utility model discloses a high-stability composite ladle edge structure, which comprises a steel shell, a permanent layer castable layer and a slag line brick which are sequentially connected from outside to inside, wherein a ladle edge magnesia carbon brick is built above the slag line brick, and the ladle edge magnesia carbon brick is built to be level to the steel shell; the inner side of the top of the steel shell is welded with a brick pressing plate, a permanent layer castable layer, the steel shell, the ladle edge magnesia carbon brick and the brick pressing plate form a filling area, an expansion gap is reserved between the ladle edge magnesia carbon brick and the brick pressing plate, the filling area is communicated with the expansion gap, and the filling area and the expansion gap are filled with a ladle edge castable. The utility model discloses in, with molten steel or slag contact one side ladle along adopting the magnesia carbon brick to replace traditional castables for normal atmospheric temperature and high temperature use intensity improve more than 50%, can effectively solve the ladle along the problem of being destroyed at scarfing cinder in-process. Therefore, the operation safety factor of the steel ladle can be improved, the abnormal off-line of the whole steel ladle caused by the damage of the steel ladle edge can be avoided, the service life of the steel ladle is prolonged, and the waste of refractory material resources is reduced.

Description

High-stability composite steel ladle edge structure

Technical Field

The utility model relates to a steel smelting equipment field, concretely relates to compound ladle of high stability is along structure.

Background

The ladle is also called as steel ladle or ladle, is an extremely important thermal container in the steel-making process, and is mainly used for containing molten steel and for the molten steel refining treatment process. At present, the ladle is cast on site by adopting castable mostly, the structure is simple to construct and has strong plasticity, but with the development of a new smelting technology, the ladle edge exposes the following problems in the actual use process:

1) along with the popularization of the ladle capping technology, the frequency of slag removal of the ladle edge is obviously increased, and due to the fact that the pouring material knotted on site is high in water adding amount, low in strength and serious in slag adhesion, the ladle edge is easy to damage and cannot be used continuously during slag removal, and the ladle is abnormally off-line;

2) along with the increase of scrap steel adding proportion, the fluctuation of steel loading amount is large, the liquid level often appears and rises to the package edge position during refining, severe erosion and damage are caused to the package edge material, the steel ladle is often abnormally off-line due to the serious package edge damage, the safe operation of the steel ladle is endangered, and the turnover efficiency of the steel ladle is reduced and the waste of refractory material resources is caused.

In recent years, researchers invented some improved ladle edge structures, for example, Chinese patent with patent number ZL201410173514.7 discloses a ladle edge masonry structure and method, which adopts a method of special-shaped slag line brick and gunning mix masonry, but the scheme has the defects that the gunning mix with the thickness of 20mm is easy to fall off in the actual use process, the placement of a ladle cover is influenced, and the ladle is abnormally off-line. Chinese utility model patent like patent No. ZL201820246573.6 discloses a ladle package is along prefabricated section and ladle package along structure, and it adopts the package to build by laying bricks or stones along adopting the prefabricated section and forms, can prevent that the package from following being hit when the scarfing cinder and collapsing, but this scheme has following shortcoming:

1) the precast block has poor steel slag corrosion capability and serious slag adhering;

2) the production process of the precast block is complex, the maintenance is needed, the production efficiency is low, and the like.

Disclosure of Invention

An object of the utility model is to overcome prior art not enough, provide a compound ladle of high stability along structure, its design simple structure, construction easy and simple to handle can effectively solve the ladle along the problem by the damage at scarfing cinder in-process, both can improve the operating safety factor of ladle, can avoid again leading to whole ladle to roll off the production line unusually because of the ladle is along the damage, extension ladle life reduces the refractory material wasting of resources.

In order to achieve the purpose, the utility model designs a high-stability composite ladle edge structure, which comprises a steel shell, a permanent layer casting material layer and a slag line brick which are sequentially connected from outside to inside, wherein a ladle edge magnesia carbon brick is built above the slag line brick, and the ladle edge magnesia carbon brick is built to be level with the steel shell; the inner side of the top of the steel shell is welded with a brick pressing plate, a filling area is formed among the permanent layer castable layer, the steel shell, the ladle edge magnesia carbon bricks and the brick pressing plate, an expansion gap is reserved between the ladle edge magnesia carbon bricks and the brick pressing plate, the filling area is communicated with the expansion gap, and the filling area and the expansion gap are filled with a ladle edge castable (the ladle edge castable is an aluminum-silicon castable with sintering temperature of 700-900 ℃).

Furthermore, anchor pieces (used for fixing the edge-wrapping pouring materials) are uniformly welded on the brick pressing plates.

And furthermore, the expansion joint is a fold line, and the width d of the expansion joint is 10-15 mm (the brick plate is prevented from being pressed by the heated expansion top of the edge magnesia carbon brick and from sliding off due to gravity when the edge magnesia carbon brick is turned over).

And furthermore, the thickness of the brick pressing plate is 10-12 mm, and the number of the brick pressing plates which are uniformly distributed along the whole circle of the package edge is 36-40.

The utility model has the advantages that:

1. the utility model discloses in, with molten steel or slag contact one side ladle along adopting the magnesia carbon brick to replace traditional castables for normal atmospheric temperature and high temperature use intensity improve more than 50%, can effectively solve the ladle along the problem of being destroyed at scarfing cinder in-process. Therefore, the operation safety coefficient of the steel ladle can be improved, abnormal off-line of the whole steel ladle caused by damage of the steel ladle edge can be avoided, the service life of the steel ladle is prolonged, and waste of refractory material resources is reduced;

2. the utility model discloses, the magnesia carbon brick that is used for package edge belongs to carbonaceous goods, and is poor with the wettability of molten steel or slag, has good anti sediment erosion and air permeability, reduces the proportion that the sediment was hung along the ladle by a wide margin, and then reduces the ladle along the frequency of scarfing cinder, both reduced the ladle along the possibility of damaging because of scarfing cinder, practiced thrift the labour of scarfing cinder again;

3. in the utility model, the magnesia carbon bricks used for wrapping edges adopt the regenerated magnesia carbon bricks as the main raw materials, and the special composite binder is used as the binding agent, thereby not only improving the use strength, but also saving a large amount of refractory raw material resources and saving the operation cost;

4. the utility model discloses in, the ladle is along mainly adopting the magnesia carbon brick, need not the health preserving in the work progress and toasts for a long time, has effectively improved ladle turnover efficiency to practice thrift a large amount of coal gas energy.

Drawings

FIG. 1 is a construction diagram of a high-stability composite ladle edge masonry structure;

in the figure, a steel shell 1, a permanent layer castable layer 2, a slag line brick 3, a ladle edge magnesia carbon brick 4, a brick pressing plate 5, a filling area 6, an expansion joint 7 and an anchoring piece 8.

Detailed Description

The invention is described in further detail below with reference to the figures and specific embodiments for the understanding of those skilled in the art.

The high-stability composite ladle edge structure shown in figure 1 comprises a steel shell 1, a permanent layer castable layer 2 and a slag line brick 3 which are sequentially connected from outside to inside, wherein a ladle edge magnesia carbon brick 4 is built above the slag line brick, and the ladle edge magnesia carbon brick is built to be level to the steel shell 1; a brick pressing plate 5 is welded on the inner side of the top of the steel shell 1, anchoring parts 8 are uniformly welded on the brick pressing plate 5, a filling area 6 is formed between the permanent layer casting material layer 2, the steel shell 1 and the edge-wrapped magnesia carbon brick 4 and the brick pressing plate 5, an expansion joint 7 is reserved between the edge-wrapped magnesia carbon brick 4 and the brick pressing plate 5, the expansion joint 7 is a broken line, and the width d of the expansion joint is 10 mm; the filling area 6 is communicated with the expansion gap 7, and the filling area 6 and the expansion gap 7 are filled with edge-wrapping castable.

The edge-wrapped magnesia carbon brick 4 is prepared by adopting a regenerated magnesia carbon brick as a main raw material and adopting a composite binder as a bonding agent, wherein the composite binder is formed by mixing phenolic resin and a resin reinforcing agent; the volume density is more than or equal to 3.10g/cm³The normal temperature flexural strength is more than or equal to 20MPa, the normal temperature compressive strength is more than or equal to 80MPa, 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 15 MPa.

The brick pressing plate 5 is made of Q235 steel, the thickness of the brick pressing plate is 10mm, and 40 whole-circle wrapping edges are uniformly distributed.

The edge-wrapping castable is an aluminum-silicon castable with the sintering temperature of between 700 and 900 ℃, and the volume density of the castable is more than or equal to 2.60g/cm³The breaking strength (800 ℃ multiplied by 3h) is more than or equal to 20MPa, and the compressive strength (800 ℃ multiplied by 3h) is more than or equal to 100 MPa.

The building process of the high-stability composite steel ladle edge structure comprises the following steps:

1. after the slag line bricks 3 are built, the magnesia carbon bricks 4 are firstly built and wrapped above the slag line bricks 3,

2. then a brick pressing plate 5 is welded on the inner side of the top end of the steel shell 1, a pre-expansion joint 7 is arranged between the brick pressing plate 5 and the edge-wrapped magnesia carbon brick 4,

3. and finally, pouring ladle edge castable behind the ladle edge magnesia carbon bricks 4, wherein the final height of the ladle edge magnesia carbon bricks 4 is flush with the steel shell 1, so that the arrangement of a ladle cover is not influenced.

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

1. The utility model provides a compound ladle of high stability is along structure, includes by outer steel-shelled (1), permanent layer castable layer (2) and slag line brick (3) that connect gradually in to, its characterized in that: a wrapping edge magnesia carbon brick (4) is built above the slag line brick, and the wrapping edge magnesia carbon brick is built to be level with the steel shell (1); the inboard welding in box hat (1) top has brick pressing plate (5), permanent layer pouring bed of material (2), box hat (1), package form between magnesia carbon brick (4) and brick pressing plate (5) filling area (6), the package is reserved expansion joint (7) along magnesia carbon brick (4) and between brick pressing plate (5), filling area (6) and expansion joint (7) intercommunication, and filling area (6) and expansion joint (7) are filled there is the package along the pouring material.

2. The high stability composite ladle edge structure of claim 1, wherein: and anchoring parts (8) are uniformly welded on the brick pressing plate (5).

3. The high stability composite ladle edge structure of claim 1, wherein: the expansion joint (7) is a broken line, and the width d of the expansion joint is 10-15 mm.

4. The high stability composite ladle edge structure of claim 1, wherein: the thickness of brick pressing plate (5) is 10 ~ 12mm, and the number of brick pressing plate package along even overall arrangement is 36 ~ 40 in whole circle.