CN214977712U

CN214977712U - Iron ladle repairing structure for casting and building combined blast furnace

Info

Publication number: CN214977712U
Application number: CN202121467682.9U
Authority: CN
Inventors: 李刚; 雷电; 官勇; 曹麒麟
Original assignee: Pangang Group Panzhihua Steel and Vanadium Co Ltd
Current assignee: Pangang Group Panzhihua Steel and Vanadium Co Ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2021-12-03
Anticipated expiration: 2031-06-30

Abstract

The utility model relates to a blast furnace smelting furnace equips the field, especially a water iron ladle building structure for blast furnace that the building combines. The utility model aims to solve the technical problem of providing an economical, practical and reliable iron ladle repairing structure for a blast furnace with pouring and building combination. The utility model provides a technical scheme that its technical problem adopted is: the iron ladle building structure for the blast furnace combined with pouring and building comprises an iron ladle, wherein a pouring protection bottom layer is arranged on the wall surface of an inner shell of the iron ladle, and a building working layer is arranged on the inner wall surface of the pouring protection bottom layer. The utility model relates to a pouring and building combined iron ladle repairing structure for a blast furnace.

Description

Iron ladle repairing structure for casting and building combined blast furnace

Technical Field

The utility model relates to a blast furnace smelting furnace equips the field, especially a water iron ladle building structure for blast furnace that the building combines.

Background

Blast furnace iron making is an iron making process with prominent advantages of production efficiency and energy utilization rate, and is an important component of a blast furnace-converter long-flow process which is mainstream in all iron and steel enterprises in the world at present. The temperature of the liquid molten iron produced by the blast furnace process is 1420-1520 ℃, and the high-temperature liquid molten iron needs to be conveyed to a steel plant by an iron ladle specially used for receiving and transporting iron. The iron ladle mainly comprises an external steel shell and a refractory material lining, the current mainstream structure form is the steel shell, and a small part of the structure form adopts the integral pouring form of the steel shell and the refractory material. The lining adopts a refractory brick masonry mode and is mainly characterized in that: a light clay brick heat-insulating layer (35mm) is built at the part close to the iron shell, a high-alumina brick protective layer (35mm) is built on the heat-insulating layer, and then a high-alumina brick working layer (120mm) is built at the uppermost part. The method has the main problems that the quantity of refractory bricks needed for building is large, the labor intensity of constructors is high, a large quantity of brick seams exist, and iron leakage is easily caused after expansion with heat and contraction with cold. The lining integrally poured by the refractory material has the advantages of convenient construction, no shortage of slag iron adhesion by personnel, integral dismantling requirement in the maintenance of the tank at the end of service, and waste of the refractory material. The method for repairing the ladle for the blast furnace by combining refractory material pouring and refractory brick pouring is provided for the lining masonry or integral pouring of refractory bricks compared with the current refractory brick.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing an economical, practical and reliable iron ladle repairing structure for a blast furnace with pouring and building combination.

The utility model provides a technical scheme that its technical problem adopted is: the iron ladle building structure for the blast furnace combined with pouring and building comprises an iron ladle, wherein a pouring protection bottom layer is arranged on the wall surface of an inner shell of the iron ladle, and a building working layer is arranged on the inner wall surface of the pouring protection bottom layer.

Further, the masonry working layer is a high-alumina brick masonry working layer.

Further, the material of pouring the protection bottom layer is AL₂O₃A refractory containing 50% or more of (A).

Further, the thickness of the pouring protection bottom layer is 70 mm.

Further, the thickness of the masonry working layer is 120 mm.

Further, the thickness of the bottom of the casting material for casting the bottom protection layer is 200 mm.

The utility model has the advantages that: in actual use, the casting protection bottom layer is adopted on the wall surface of the inner shell of the iron ladle, so that only one masonry working layer needs to be built outside the casting protection bottom layer, and compared with the traditional full-refractory brick masonry method, the construction efficiency is high, and the labor intensity of constructors is low. Secondly, pour the inside lining of protection bottom as the indisputable package, no brickwork joint, the wholeness is good, eliminates the potential safety hazard of molten iron infiltration brickwork joint, can effectively avoid the flange joint position of indisputable package to lead to the fact inside brick lining to produce the crackle because of reasons such as collision are not hard up, has eliminated the safe risk of hourglass indisputable. The utility model relates to a pouring and building combined iron ladle repairing structure for a blast furnace.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Labeled as: the iron ladle 1, pour protection bottom 2, pouring material bottom 21, masonry working layer 3.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

The iron ladle repairing structure for the casting and building combined blast furnace shown in fig. 1 comprises an iron ladle 1, wherein a casting protection bottom layer 2 is arranged on the wall surface of an inner shell of the iron ladle 1, and a building working layer 3 is arranged on the inner wall surface of the casting protection bottom layer 2.

As an economical, applicable and reliable iron ladle building form, the building structure not only avoids the defect of large workload of building the whole brick lining, but also avoids the defect of wasting refractory materials by integral pouring. Preferably used to contain AL₂O₃Pouring a 70mm protective bottom layer of a main (content is more than 50%) refractory material on the iron clad inner shell, and building a high-alumina brick working layer on the pouring surface after demoulding, wherein the building thickness of the high-alumina brick working layer is 120 mm. Naturally curing for 24 hours, and then baking, thus being put into normal use.After the iron ladle manufactured by the pouring and building structure is used for 200 times on line, the indicated high-alumina brick working layer can be detached as required, and a new high-alumina brick working layer can be built again to be put into normal use. Generally, the casting protection bottom layer can be used for more than 5-6 periods, so that the cost of refractory materials can be effectively saved, and the phenomenon that iron slag is adhered to an iron ladle can be effectively relieved, thereby improving the iron content of the iron ladle.

Preferably, the masonry working layer 3 is a high-alumina brick masonry working layer, so that better durability is obtained, and the masonry working layer is convenient to disassemble and replace at a later stage. Preferably, the material of the pouring protection bottom layer 2 is AL₂O₃The content of the refractory material is more than 50 percent, thereby improving the performance of the bottom layer of the working layer. In combination with practical experience, in order to achieve the balance between high-quality performance and manufacturing cost, the thickness of the casting protection bottom layer 2 is preferably 70 mm. Based on the same concept, the masonry working layer 3 is preferably 120mm thick, and the castable bottom 21 of the casting protection bottom layer 2 is preferably 200mm thick.

Claims

1. The utility model provides a structure of building is repaiied to iron ladle for blast furnace that waters and build combination, including iron ladle (1), its characterized in that: a pouring protection bottom layer (2) is arranged on the wall surface of an inner shell of the iron ladle (1), and a masonry working layer (3) is arranged on the inner wall surface of the pouring protection bottom layer (2).

2. The ladle repairing structure for a blast furnace with pouring and building combination according to claim 1, characterized in that: the masonry working layer (3) is a high-alumina brick masonry working layer.

3. The ladle repairing structure for a blast furnace by pouring and building combination according to claim 1 or 2, characterized in that: the casting protection bottom layer (2) is made of AL₂O₃A refractory containing 50% or more of (A).

4. The ladle repairing structure for a blast furnace by pouring and building combination according to claim 1 or 2, characterized in that: the thickness of the pouring protective bottom layer (2) is 70 mm.

5. The ladle repairing structure for a blast furnace by pouring and building combination according to claim 1 or 2, characterized in that: the thickness of the masonry working layer (3) is 120 mm.

6. The ladle repairing structure for a blast furnace by pouring and building combination according to claim 1 or 2, characterized in that: the thickness of the bottom (21) of the casting material for casting the protective bottom layer (2) is 200 mm.