Energy-saving tuyere small sleeve with embedded conical wear-resistant ceramic composite pipe for blast furnace

Abstract

The utility model discloses an energy-saving tuyere small sleeve with an embedded conical wear-resistant ceramic composite pipe for a blast furnace, and particularly relates to the technical field of blast furnaces of iron works, which comprises a tuyere small sleeve body, and the conical wear-resistant ceramic composite pipe is arranged in the tuyere small sleeve body; the conical wear-resistant ceramic composite pipe comprises a metal outer wall layer, and a ceramic inner wall layer is arranged on the inner side of the metal outer wall layer. According to the utility model, the conical wear-resistant ceramic composite pipe is arranged, so that the problem that the inner wall of the small sleeve leaks water due to the fact that pulverized coal flow scours the inner wall of the small sleeve of the tuyere is better solved, and more importantly, the length of the ceramic composite pipe on the inner wall is greatly increased, and the energy-saving effect is improved to the greatest extent.

Description

Technical Field

[0001] This utility model relates to the field of blast furnace technology in ironmaking plants, and more specifically, to an energy-saving tuyer sleeve for blast furnaces with an embedded conical wear-resistant ceramic composite pipe. Background Technology

[0002] The tuyere sleeve is an important piece of equipment in the blast furnace air intake system. Its function is to send ultra-high temperature hot air into the blast furnace. Traditional tuyere sleeves are made of more than 95% pure copper and have a hollow structure. Cooling water flows inside the cavity, and the ultra-high temperature hot air is delivered through the conical inner wall at the center. The tuyere sleeve extends directly into the blast furnace. Its end is a high temperature environment of nearly 2000°C, and further in is liquid high temperature slag and iron. The temperature of the molten slag and iron is above 1400°C. The temperature of the hot air passing through the tuyere sleeve is also above 1100°C. Therefore, the working environment of the tuyere sleeve is extremely harsh.

[0003] To reduce smelting costs and the amount of high-quality coke used in blast furnaces, ironworks inject relatively inexpensive pulverized coal into the blast furnace to replace some of the coke. After being ejected from the pulverized coal lance, the coal disperses outwards, potentially eroding the inner wall of the tuyeres. Copper is relatively soft and extremely abrasion-prone; the dispersed coal can wear through the inner wall of the tuyeres in a very short time. Leaks in the tuyeres will seriously affect the safe operation of the blast furnace. If not detected in time, it can lead to serious accidents such as furnace wall adhesion, hearth accumulation, taphole splashing, furnace cooling, or even hearth freezing. To prevent the inner wall of the tuyeres from being eroded by coal, the pulverized coal lance must extend towards the end of the tuyeres, but not too far, as the working environment at the end of the tuyeres is too harsh and would severely damage the pulverized coal lance. Therefore, the pulverized coal lance outlet extends a certain distance from the end of the tuyeres, ensuring that it does not abrade the inner wall of the tuyeres.

[0004] However, in the actual use of blast furnace pulverized coal spray guns, due to deformation of the blast furnace pulverized coal spray guns caused by various reasons, it is still inevitable that the blast furnace pulverized coal spray guns will scour the inner wall of the tuyeres sleeve.

[0005] Therefore, there is an urgent need for a tapered wear-resistant ceramic composite pipe to maximize the length of the composite pipe on the inner wall of the air outlet sleeve, thereby significantly improving energy-saving efficiency. Utility Model Content

[0006] To overcome the aforementioned deficiencies of the prior art, embodiments of this utility model provide an energy-saving tuyer sleeve with an embedded conical wear-resistant ceramic composite tube for blast furnaces. By incorporating the conical wear-resistant ceramic composite tube, this utility model not only better solves the problem of water leakage caused by pulverized coal flow scouring the inner wall of the tuyer sleeve, but more importantly, it significantly increases the length of the inner ceramic composite tube, maximizing the energy-saving effect and thus addressing the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an energy-saving tuyer sleeve with an embedded conical wear-resistant ceramic composite pipe for blast furnaces, comprising a tuyer sleeve body, wherein a conical wear-resistant ceramic composite pipe is disposed inside the tuyer sleeve body;

[0008] The tapered wear-resistant ceramic composite pipe includes a metal outer wall layer, and a ceramic inner wall layer is provided on the inner side of the metal outer wall layer.

[0009] In a preferred embodiment, the outer metal wall layer is bonded to the inner wall of the vent sleeve body.

[0010] The technical effects and advantages of this utility model are as follows:

[0011] This invention, by incorporating a tapered, wear-resistant ceramic composite tube, not only better solves the problem of water leakage caused by coal powder flowing through the inner wall of the air vent sleeve, but also significantly increases the length of the inner ceramic composite tube, thereby maximizing energy-saving performance. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the cross-sectional structure of the metal outer wall layer of this utility model.

[0014] The attached diagram is labeled as follows: 1. Air vent sleeve body; 2. Conical wear-resistant ceramic composite pipe; 3. Metal outer wall layer; 4. Ceramic inner wall layer. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] As attached Figure 1-2 As shown, this utility model provides an energy-saving tuyer sleeve with an embedded conical wear-resistant ceramic composite pipe for blast furnaces, including a tuyer sleeve body 1, wherein a conical wear-resistant ceramic composite pipe 2 is provided inside the tuyer sleeve body 1.

[0017] The tapered wear-resistant ceramic composite pipe 2 includes a metal outer wall layer 3, and a ceramic inner wall layer 4 is provided on the inner side of the metal outer wall layer 3.

[0018] The outer metal wall layer 3 is attached to the inner wall of the air vent sleeve body 1.

[0019] The specific implementation method is as follows: When using this utility model, the thermal conductivity of both steel and ceramic is much lower than that of copper, especially ceramic, which is only 1 / 72 of that of copper. Therefore, the ceramic composite pipe has a good energy-saving function, and the longer the ceramic composite pipe, the greater the energy-saving benefit. The conical wear-resistant ceramic composite pipe 2 can effectively solve this problem. It can increase the length of the ceramic composite pipe by several times. In extreme cases, it can almost cover the entire inner wall of the tuyeres sleeve body 1, thus increasing the energy-saving benefit several times. The inner wall of this utility model is almost entirely made of conical wear-resistant ceramic composite pipe 2, which will minimize the heat carried away by the cooling water, significantly reduce the temperature difference between the inlet and outlet water of the sleeve, and indirectly increase the hot air temperature, which is beneficial to the combustion of pulverized coal. This saves a lot of production consumption for the blast furnace and brings very considerable economic benefits. The insertion depth of the blast furnace pulverized coal lance can be further moved backward to continue to extend the distance of the pulverized coal combustion zone and the combustion time of the pulverized coal. To further improve the combustion rate of pulverized coal, this invention comprises a copper tuyere sleeve body 1 and a conical wear-resistant ceramic composite tube 2. The conical wear-resistant ceramic composite tube 2 is designed and manufactured according to the original tuyere sleeve dimensions, ensuring its inner diameter matches or is close to that of the original tuyere sleeve. This minimizes the impact on the blast furnace's process parameters. The outer wall of the conical wear-resistant ceramic composite tube 2 is precision machined according to the dimensions specified in the drawings, ensuring a tight fit with the inner diameter of the tuyere sleeve body 1. A copper tuyere sleeve is then designed and manufactured based on the dimensions of the conical wear-resistant ceramic composite tube 2. The smaller end of the wear-resistant ceramic composite tube is then inserted into the larger end of the tuyere sleeve until they are tightly fitted. This invention not only effectively solves the problem of water leakage caused by pulverized coal flow scouring the inner wall of the tuyere sleeve, but also significantly increases the length of the inner ceramic composite tube, maximizing energy savings.

[0020] Working principle of this utility model:

[0021] Refer to the instruction manual appendix Figure 1-2 When using this utility model, by providing a tapered wear-resistant ceramic composite pipe 2, this utility model not only better solves the problem of water leakage caused by coal powder flow scouring the inner wall of the air outlet sleeve, but also significantly increases the length of the inner wall ceramic composite pipe, thereby maximizing the energy-saving effect.

[0022] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0023] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0024] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An energy-saving tuyere sleeve with an embedded conical wear-resistant ceramic composite pipe for blast furnaces, comprising a tuyere sleeve body (1), characterized in that: The air vent sleeve body (1) is equipped with a tapered wear-resistant ceramic composite tube (2). The tapered wear-resistant ceramic composite pipe (2) includes a metal outer wall layer (3), and a ceramic inner wall layer (4) is provided on the inner side of the metal outer wall layer (3).

2. The energy-saving tuyeres sleeve with an embedded conical wear-resistant ceramic composite pipe for blast furnaces according to claim 1, characterized in that: The outer metal wall layer (3) is attached to the inner wall of the air vent sleeve body (1).

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