Blast furnace castable cooling wall

Abstract

The utility model discloses a blast furnace castable cooling wall, which relates to the technical field of blast furnace body cooling equipment and comprises a cooling wall base body, a cooling water pipe is arranged inside one side of the cooling wall base body, and a protective sleeve is sleeved on the side surface of the cooling water pipe extending out of the cooling wall base body; dovetail-shaped grooves are vertically formed in the side face of the other side of the cooling wall base body at intervals, anchoring parts are transversely arranged in the dovetail-shaped grooves at intervals, the anchoring parts in every two adjacent dovetail-shaped grooves are vertically arranged in a staggered mode, and a pouring layer is poured on one side of the dovetail-shaped grooves of the cooling wall base body; the blast furnace cooling wall has the beneficial effects that the part of the cooling water pipe pre-embedded in the cooling wall base body is protected by the protective sleeve, the casting technology of the blast furnace cooling wall hot surface after casting molding can adopt on-site integral casting construction, and the casting material is integrally cast on the hot surface of the cooling wall, so that the problems of falling and damage of refractory bricks, complex construction process and low construction cost in the past can be avoided. And the slag adhering capacity is high, the overall performance is good, and the device can adapt to large blast furnace body cooling working conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace body cooling equipment, in particular to a blast furnace castable cooling wall. Background Art

[0002] The cast iron cooling stave of a blast furnace belongs to the cooling equipment of the blast furnace body. It is constructed of cast iron parts with embedded low-carbon seamless steel pipes. It is responsible for cooling the furnace body to protect the furnace shell and steel structure, supporting refractory materials, and maintaining a reasonable furnace shape to achieve smooth production. Especially when installing brick-lined cooling walls above the furnace bosh, there is currently a type of blast furnace cooling wall composed of a cooling wall body and refractory bricks embedded in the hot surface. The hot surface cooling wall with a dovetail groove is first cast, and then the refractory bricks and mud binder are embedded in the dovetail groove of the hot surface according to the process ratio, and the refractory bricks are required to fit perfectly with the dovetail groove. This type of brick-lined cooling wall has the following shortcomings during production, construction, transportation and use: 1. The cooling wall and refractory bricks are not integrally formed and constructed, and some are constructed on-site at the blast furnace, and the integrity is not good; 2. There are many horizontal and vertical seams in the bricks, and there are manufacturing cumulative errors and brick seam errors in the dovetail groove of the cooling wall, which makes it difficult to embed refractory bricks; 3. The construction process is relatively complicated; 4. This type of brick-lined cooling wall has high requirements for transportation, installation and integrity, but this type of brick-lined cooling wall is prone to damage, loosening, or even falling off of refractory bricks before transportation and installation, affecting the overall service life of the blast furnace; 5. This type of brick-lined cooling wall has poor slagging and slagging properties, which directly affects the overall stability of the blast furnace. It is urgent and necessary to design a cooling wall for blast furnace castables, which can avoid the falling and damage of refractory bricks, the complicated construction process, and realize the cooling wall with strong slag hanging ability and good overall performance. Utility Model Content

[0003] The purpose of the utility model is to provide a blast furnace castable cooling wall to solve the above problems, which can avoid the refractory bricks from falling off and being damaged, and the complicated construction process, and has strong slag hanging ability and good overall performance, and can adapt to the cooling conditions of large blast furnace bodies.

[0004] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0005] A blast furnace castable cooling wall comprises a cooling wall base, a cooling water pipe is arranged inside one side of the cooling wall base, and a protective sleeve is provided on the side position where the cooling water pipe extends out of the cooling wall base to protect the cooling water pipe; dovetail grooves are arranged vertically at intervals on the side surface of the other side of the cooling wall base, anchors are arranged horizontally at intervals in the dovetail grooves, and the anchors in two adjacent dovetail grooves are vertically staggered, and a casting layer is cast on one side of the dovetail groove of the cooling wall base.

[0006] Preferably, the protective sleeve and the cooling water pipe are both pre-buried in the cooling wall matrix.

[0007] Preferably, a sealing ring is provided between one end of the cooling water pipe extending out of the cooling wall base and the protective sleeve.

[0008] Preferably, the cooling wall substrate is made of QT400-18 or QT400-20 casting material.

[0009] Preferably, a hanging ring is fixedly installed on the upper end of the cooling wall base.

[0010] Preferably, bolt holes are reserved on the cooling wall base body and pass through the cooling wall base body.

[0011] Preferably: the cooling water pipe is a 10 steel seamless steel pipe, and the protective sleeve is a 20 steel seamless steel pipe.

[0012] Preferably, the casting material of the casting layer is a composite fiber wear-resistant casting material, and the composite fiber wear-resistant casting material includes composite steel fiber and refractory material.

[0013] Compared with the existing technology, the beneficial effects of the present invention are: the cooling water pipe adopts 10 steel seamless steel pipe with a wall thickness of about 6mm, the part of the steel pipe pre-buried in the cooling wall matrix is ​​protected by a protective casing, and the blast furnace cooling wall hot surface pouring technology after casting can adopt on-site integral pouring construction, and is poured as a whole on the hot surface of the cooling wall in the form of castables, which can avoid the previous refractory bricks falling off, damage, and complicated construction process, and achieves strong slag hanging ability and good overall performance, and can adapt to the cooling conditions of large blast furnace furnace bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0015] Figure 1 It is a structural schematic diagram of a blast furnace castable cooling wall described in the utility model.

[0016] The following are the descriptions of the reference numerals:

[0017] 1. Cooling wall base; 2. Cooling water pipe; 3. Protective sleeve; 4. Sealing ring; 5. Pipe cap; 6. Lifting ring; 7. Bolt hole; 8. Anchor; 9. Casting layer. DETAILED DESCRIPTION

[0018] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features limited to "first", "second" and the like may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] like Figure 1 As shown, a blast furnace castable cooling stave comprises a cooling stave base 1, a cooling water pipe 2 is arranged inside one side of the cooling stave base 1, and a protective sleeve 3 for protecting the cooling water pipe 2 is provided at a side position where the cooling water pipe 2 extends out of the cooling stave base 1; dovetail grooves are arranged vertically at intervals on the other side of the cooling stave base 1, and anchors 8 are arranged horizontally at intervals in the dovetail grooves, and the anchors 8 in two adjacent dovetail grooves are vertically staggered, and the anchors 8 play a role of being tightly combined with the refractory material; a casting layer 9 is cast on one side of the dovetail groove of the cooling stave base 1.

[0022] In this embodiment, a sealing ring 4 is provided between one end of the cooling water pipe 2 extending out of the cooling wall base 1 and the protective sleeve 3; a pipe cap 5 is provided on the pipe head of the cooling water pipe 2; the sealing ring 4 is used to seal between the cooling water pipe 2 and the protective sleeve 3 and also to prevent leakage of blast furnace gas, and the pipe cap 5 prevents other debris from entering the interior of the cooling water pipe 2.

[0023] In this embodiment, a lifting ring 6 is fixedly installed on the upper end of the cooling wall base 1, and bolt holes 7 are reserved on the cooling wall base 1 to pass through the left and right sides; the lifting ring 6 plays a lifting role, and the bolt holes 7 can be passed through square head studs to connect with the furnace shell, playing a fastening role.

[0024] In this embodiment, the cooling water pipe 2 adopts a 10 steel seamless steel pipe with a wall thickness of about 6 mm, and the protective sleeve 3 is a 20 steel seamless steel pipe. The protective sleeve 3 and the cooling water pipe 2 are both pre-buried in the cooling wall matrix 1. The portion of the cooling water pipe 2 pre-buried on the surface of the cooling wall matrix 1 is protected by the protective sleeve 3. After casting, the blast furnace cooling wall hot surface pouring technology can adopt on-site integral pouring construction, and is poured as a whole on the hot surface of the cooling wall in the form of castables, which can avoid the previous refractory bricks from falling off, being damaged, and having complicated construction processes, and achieves strong slag hanging ability and good overall performance, and can adapt to the cooling conditions of large blast furnace bodies.

[0025] In this embodiment, one side of the dovetail groove of the cooling wall base 1 is the hot surface of the blast furnace cooling wall. The pouring technology of the blast furnace cooling wall hot surface pouring layer 9 can adopt on-site integral pouring construction, and it is poured as a whole on the hot surface of the cooling wall in the form of castable. Composite fiber wear-resistant castable is used. The composite fiber wear-resistant castable has the effects of wear resistance and strong slag hanging ability. The composite fiber wear-resistant castable is prepared by composite fiber and refractory material in a certain proportion. The refractory material is composed of silicon nitride composite micropowder, high-purity silicon carbide, corundum, alumina micropowder and silicon micropowder and binder, water reducer mixed in a certain proportion. The binder is divided into silicone gel and aluminate cement.

[0026] The construction process of the hot surface pouring technology of the blast furnace cooling wall is an existing technology, so it will not be described in detail here.

[0027] In this embodiment, the cooling wall substrate 1 is cast from QT400-18 or QT400-20. First, it is necessary to ensure that the steel pipe does not deform or melt through during the casting process of the cooling wall substrate 1. Second, it is necessary to ensure that there is a certain gap between the steel pipe and the cooling wall substrate 1 so that the good heat transfer effect of the inner cast pipe can be fully exerted. Third, the production process needs to be simple to operate in order to achieve industrial mass production.

[0028] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions only illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model will also have various changes and improvements, and these changes and improvements will fall within the scope of the utility model to be protected.

Claims

1. A blast furnace castable cooling stave, comprising a cooling stave base (1), characterized in that: A cooling water pipe (2) is provided inside one side of the cooling wall base (1), and a protective sleeve (3) is provided on the side of the cooling water pipe (2) extending out of the cooling wall base (1) for protecting the cooling water pipe (2); dovetail grooves are arranged vertically at intervals on the other side of the cooling wall base (1), and anchors (8) are arranged horizontally at intervals in the dovetail grooves, and the anchors (8) in two adjacent dovetail grooves are vertically staggered, and a casting layer (9) is cast on one side of the dovetail groove of the cooling wall base (1).

2. The blast furnace castable cooling stave according to claim 1, characterized in that: The protective sleeve (3) and the cooling water pipe (2) are both pre-buried in the cooling wall matrix (1).

3. The blast furnace castable cooling stave according to claim 1, characterized in that: A sealing ring (4) is provided between one end of the cooling water pipe (2) extending out of the cooling wall base (1) and the protective sleeve (3).

4. The blast furnace castable cooling stave according to claim 1, characterized in that: The cooling wall substrate (1) is made of QT400-18 or QT400-20 cast material.

5. The blast furnace castable cooling stave according to claim 1, characterized in that: A hanging ring (6) is fixedly mounted on the upper end of the cooling wall base (1).

6. The blast furnace castable cooling stave according to claim 1, characterized in that: Bolt holes (7) are reserved on the cooling wall base (1) and pass through the cooling wall base (1).

7. The blast furnace castable cooling stave according to claim 1, characterized in that: The cooling water pipe (2) is a 10 steel seamless steel pipe, and the protective sleeve (3) is a 20 steel seamless steel pipe.

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