CN101693931A - Cooling device at tuyere part of blast furnace - Google Patents

Abstract

The invention discloses a cooling device for the tuyere part of a blast furnace, which is characterized in that the cooling device comprises a cooling plate (1) fixed on the furnace shell and located at the upper part of the tuyere part and a cooling plate (1) fixed on the furnace shell and located at the tuyere part The lower cooling wall (2). The invention fully utilizes the advantages of the cooling wall and the cooling plate, has the advantages of good cooling effect, high cooling efficiency, not easy to damage, can effectively protect the tuyere combined brick and tuyere equipment, and improve the stability of the furnace belly position.

Description

A cooling device for blast furnace tuyeres

technical field

The invention relates to a cooling device at the blast furnace tuyere, in particular to a cooling device at the joint of the blast furnace tuyere belt and the bosh belt.

Background technique

The upper part of the blast furnace tuyere is the upper edge of the blast furnace hearth, which is also the basis for the formation of the furnace belly, while the lower part of the furnace belly is the drip zone of blast furnace smelting, which is washed by the falling high-temperature slag and iron flow. At the same time, this part is in the tuyere combustion zone , so the thermal load of this part should be the first of the whole blast furnace. At present, the tuyere of the blast furnace adopts a whole piece of stave arranged along the circumferential direction of the blast furnace for surface cooling, and the installation channel of the tuyere equipment is left when the stave is cast. This cooling form has the advantages of uniform cooling and good sealing, but the cooling depth is not enough, and it can only protect the large set of tuyere. The wall-type cooling capacity is difficult to meet the requirements and cannot effectively protect the tuyere bricks. The tuyere bricks are subjected to long-term erosion of high-temperature gas flow, slag iron flow, and slag-coke mixture in the swing area, and the life of the tuyere bricks is getting shorter and shorter. When the tuyere bricks After being eroded, the tuyere middle sleeve was exposed to the harsh smelting environment, causing a large number of tuyere equipment to burn out, and even the upper end of the tuyere stave was burned during production, causing water pipes to rupture and leak, endangering the safety of the blast furnace hearth. On the one hand, after the tuyere bricks are completely eroded, it threatens the stability of the structure above the bosh. In severe cases, it will cause the furnace shell at the bosh to become red and crack, which seriously threatens the safe production of the blast furnace.

Contents of the invention

The object of the present invention is to provide a cooling device for the blast furnace tuyere with good cooling effect.

In order to achieve the above purpose, the following technical solutions are adopted:

A cooling device for a blast furnace tuyere, characterized in that the cooling device includes a cooling plate fixed on the furnace shell and located above the tuyere, and a cooling wall fixed on the furnace shell and located below the tuyere.

The cooling plates can be distributed in one or more layers.

In order to save materials and improve the use efficiency of the cooling plate, the cooling plate is located within a range of no more than 1.5m in the longitudinal direction above the center line of the tuyere device, and the cooling plates are distributed in multiple layers in a staggered manner.

The cooling plate is welded on the furnace shell; the cooling wall is fixed on the furnace shell by bolts.

The cooling plate and stave are made of cast steel, cast iron or copper.

The beneficial effects of the present invention are:

The upper part of the tuyere adopts a cooling plate, which is horizontally inserted deep into the furnace, has a large cooling depth, high cooling intensity, high cooling efficiency, and is not easy to be damaged. The cooling plate can also be replaced under damaged conditions; and it is easy to hang slag, and the slag skin is not easy to fall off. , which is beneficial to the protection of the tuyere bricks, and the existence of the tuyere bricks is extremely important to the safety of the tuyere equipment and the belly of the furnace; in the most unfavorable case, when the tuyere bricks are completely eroded, the cooling plate can still play the role of the tuyere bricks , continue to maintain furnace production;

The lower part of the tuyere adopts a cooling wall, which has uniform cooling and good sealing. It is protected by a cooling plate and a middle sleeve of the tuyere, which can ensure the safety of the furnace hearth.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a left side view of Fig. 1 .

Detailed ways

Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

A cooling device for the tuyeres of a blast furnace, the device comprises two layers of copper cooling plates 1 arranged staggered in the longitudinal direction within 1.5m above the centerline of the tuyeres in the blast furnace shell, and low chromium cast iron cooling walls arranged along the circumferential direction of the blast furnace at the lower part of the tuyeres 2. The staggered distribution saves the number of cooling plates 1 and saves materials without affecting the cooling effect. The copper cooling plate 1 is welded on the furnace shell, and the low-chromium cast iron stave 2 is fixed on the blast furnace shell by bolts. The cooling wall 2 and the cooling plate 1 have cooling passages inside, through which water is passed for cooling.

The invention has the advantages of strong cooling capacity, not easily damaged, high cooling efficiency, stable structure, regular operation furnace type and the like.

The materials of the cooling plate 1 and the cooling wall 2 here can be cast steel, cast iron or copper, or other heat conducting materials. The cooling plate can be only one layer, or can be distributed in multiple layers, and the distribution form can also adopt other ways. These all fall within the protection scope of the present invention.

Claims (6)

1. A cooling device at the tuyere position of a blast furnace, characterized in that: the cooling device includes a cooling plate (1) fixed on the furnace shell and positioned at the upper part of the tuyere position and a cooling plate (1) fixed on the furnace shell and positioned at the lower part of the tuyere position Stave (2). 2. The cooling device at the blast furnace tuyere according to claim 1, characterized in that: the cooling plate (1) is located within a range of not more than 1.5m in the longitudinal direction above the centerline of the tuyere equipment. 3. The cooling device for the blast furnace tuyere according to claim 2, characterized in that the cooling plate (1) has at least one layer. 4. The cooling device at the tuyeres of the blast furnace according to claim 2, characterized in that the cooling plates (1) are multi-layered and staggered. 5. The cooling device at the blast furnace tuyere according to any one of claims 1 to 4, characterized in that: the cooling plate (1) is welded on the furnace shell; the stave (2) is fixed on the furnace shell by bolts on the furnace shell. 6. The cooling device at the tuyeres of a blast furnace according to any one of claims 1 to 4, characterized in that: the material of the cooling plate (1) and stave (2) is cast steel, cast iron or copper.

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