CN205300256U - Metallurgical stove brickwork structure - Google Patents

Abstract

The utility model discloses a furnace wall structure of a metallurgical furnace, which comprises a refractory brick layer, a silicon carbide brick layer, and a furnace shell steel plate successively built from the inside to the outside; There is a cooling groove channel inside the copper water jacket, and the end of the copper water jacket is provided with an outlet pipe and an inlet pipe connected with the cooling groove passage, and the outlet pipe and the inlet pipe pass through the steel plate of the furnace shell and protrude; The assembly gap between the water jacket and the silicon carbide brick layer is filled with ramming material with thermal conductivity. The furnace wall structure of the utility model can not only control the temperature of the hot surface of the furnace wall below the critical reaction temperature, but also has good cooling effect, low cost, small water consumption, good stability of the furnace wall, and can be replaced from outside the furnace after damage. The advantage of easy maintenance.

Description

A metallurgical furnace wall structure

technical field

The utility model belongs to a non-ferrous metallurgical furnace kiln whose furnace wall is built by refractory materials, in particular to a furnace wall structure of a metallurgical furnace.

Background technique

In recent years, with the advancement of smelting technology and the development of refractory material technology, the life of the furnace bottom has been greatly improved, and the life of the furnace wall made of multi-layer refractory materials has become a weak link in production. During production, the furnace wall is subjected to high temperature and thermal shock, slag and metal erosion and erosion, and furnace charge wear, etc., resulting in a short service life of the furnace wall, and it is necessary to stop the furnace to replace the refractory material. Expansion with heat and contraction with cold, the strength is weakened, and it is easy to crack, resulting in low kiln operation rate and affecting the entire production process.

In response to this problem, the initial direction is based on improving refractory materials, using high-quality refractory materials that are resistant to high temperature, erosion and wear, and erosion to resist harsh working environments, and using refractory materials to inhibit corrosion to extend the service life of the furnace wall. Practice has proved that the use of high-quality refractory materials can cure the symptoms but not the root cause. Although the life span has increased, the effect is not ideal.

Furthermore, an all-copper water-jacketed brick-mounted slag-hanging furnace wall has been developed. Its structure is to inlay and arrange refractory bricks in a whole piece of copper water jacket with the same size as the furnace wall. The temperature is controlled below the critical reaction temperature to inhibit chemical erosion and wear and improve the service life of the furnace wall. However, it is mainly used in large-scale intensified smelting furnaces, and there are problems such as high cost and large amount of circulating water, so it is difficult to popularize in small-scale smelting furnaces.

Chinese patent 201220307628.2 discloses a furnace wall structure for non-ferrous metallurgical kilns, including refractory bricks and steel plates arranged outside the refractory bricks; The water pipeline is connected to the water outlet pipeline. The refractory brick is provided with a U-shaped groove, and the water-cooling pipe is placed in the U-shaped groove. This kind of furnace wall structure really solves the problem that the metallurgical furnace wall refractory bricks with simple refractory brick and steel plate structure are easy to be corroded, scoured and have a short service life. But still there are following defects:

(1) Due to the need to slot on the refractory bricks, the overall structure of the refractory bricks is destroyed, resulting in easy damage to the refractory bricks, uneven cooling, and the slotting process also makes the manufacture of refractory bricks more complicated. Moreover, the water-cooled pipes inlaid on the refractory bricks will be replaced as a whole when they need to be replaced, and the replacement of the refractory bricks is also extremely inconvenient.

(2) Once the water-cooled pipe leaks, it will corrode the refractory bricks.

(3) The cooling structure is integral cooling, which consumes a lot of water.

In addition, in the existing copper water jacket structure, pipes are usually arranged inside and then cast into shape, but the inner pipe arrangement will cause the entire copper water jacket to be too large in size, thereby affecting its cooling effect. Moreover, when replacing, the furnace must be stopped for replacement, which affects production efficiency.

Utility model content

In view of the above problems, the utility model aims to provide a metallurgical furnace wall structure with good cooling effect, low cost, small water consumption and good furnace wall stability. After the furnace wall structure is damaged, it can be replaced from the outside of the furnace, which is convenient for maintenance .

The technical scheme for solving the problem of the utility model is: a furnace wall structure of a metallurgical furnace, including a layer of refractory bricks, a layer of silicon carbide bricks, and a furnace shell steel plate built sequentially from the inside to the outside;

A plurality of copper water jackets are arranged in the middle of the silicon carbide brick layer, and a cooling groove channel is opened inside the copper water jacket, and an outlet pipe and an inlet pipe connected with the cooling groove passage are provided at the end of the copper water jacket. The water pipe and the water inlet pipe pass through the steel plate of the furnace shell and protrude;

The assembly gap between the copper water jacket and the silicon carbide brick layer is filled with ramming material with thermal conductivity.

Specifically, the manner in which the copper water jackets are arranged at intervals in the silicon carbide brick layer is to arrange at intervals along the transverse and/or longitudinal directions.

Further, the copper water jacket and the cooling groove channel inside are integrally formed, and the cooling liquid directly contacts the main body of the copper water jacket.

For this reason, in the further improved technical solution, the traditional way of laying pipes in the copper water jacket is abandoned, and the cooling groove channel is directly cast when casting the copper water jacket, so that the cooling liquid directly contacts the main body of the copper water jacket, and the cooling efficiency is improved. improve. Moreover, the volume of the copper water jacket is greatly reduced, and there is no need to stop the furnace when replacing the copper water jacket, which is more convenient.

The remarkable effect of the present utility model is:

1. The structural form in which the copper water jacket is installed in the silicon carbide brick layer of the furnace wall at intervals forms an effective point cooling. The refractory bricks are cooled by circulating water, the use temperature of the refractory bricks is reduced, and the temperature of the hot surface of the refractory bricks is controlled below the critical reaction temperature, so that the refractory bricks in contact with the hot melt can always maintain sufficient thickness without chemical erosion and wear, prolonging the life of the refractory bricks. The service life of the furnace wall is extended.

2. The cooling system does not need to destroy the overall structure of the refractory material, and the copper water jacket can be arranged according to the needs, so that the cooling is uniform.

3. The cooling liquid is in direct contact with the main body of the copper water jacket, and the cooling efficiency is improved. The manufacturing process of the copper water jacket of the utility model greatly reduces the volume of the copper water jacket, and there is no need to stop the furnace when replacing the copper water jacket, which is more convenient.

4. The copper water jacket structure of the utility model has high reliability, and there will be no corrosion of refractory bricks due to coolant leakage, which can ensure high reliability of the furnace wall.

5. After the furnace wall structure is damaged, it can be replaced from the outside of the furnace, which is convenient for maintenance.

6. Compared with the all-copper water-jacketed brick-inlaid slag-hanging furnace wall, the furnace wall structure of this patent does not need to manufacture a large-sized whole piece of copper water-jacketed cooling wall, which reduces the cost and the consumption of circulating water.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described.

Fig. 1 is the utility model furnace wall structure schematic diagram.

Fig. 2 is a sectional view of A-A in Fig. 1 .

In the figure: 1-furnace shell steel plate, 2-silicon carbide brick layer, 3-ramming material, 4-refractory brick layer, 5-copper water jacket, 6-water outlet pipe, 7-water inlet pipe.

detailed description

As shown in Figures 1-2, a furnace wall structure of a metallurgical furnace includes a refractory brick layer 4, a silicon carbide brick layer 2, and a furnace shell steel plate 1 that are sequentially built from the inside to the outside.

A plurality of copper water jackets 5 are arranged in the silicon carbide brick layer 2 at intervals along the transverse direction and/or longitudinal direction. The inside of the copper water jacket 5 is provided with a cooling channel. The end of the copper water jacket 5 is provided with an outlet pipe 6 and an inlet pipe 7 communicating with the channel of the cooling tank, and the outlet pipe 6 and the inlet pipe 7 pass through the steel plate 1 of the furnace shell and protrude.

The assembly gap between the copper water jacket 5 and the silicon carbide brick layer 2 is filled with a ramming material 3 with thermal conductivity.

The copper water jacket 5 and the cooling groove channel inside are integrally formed, and the cooling liquid directly contacts the main body of the copper water jacket.

Claims (3)

1. A furnace wall structure of a metallurgical furnace, characterized in that: it includes a refractory brick layer (4), a silicon carbide brick layer (2), and a furnace shell steel plate (1) built sequentially from the inside to the outside; The silicon carbide brick layer (2) is provided with a plurality of copper water jackets (5) at intervals, the inside of the copper water jacket (5) has a cooling channel, and the end of the copper water jacket (5) is provided with a cooling groove The water outlet pipe (6) and the water inlet pipe (7) connected by the channel, the water outlet pipe (6) and the water inlet pipe (7) pass through the furnace shell steel plate (1) and protrude; The assembly gap between the copper water jacket (5) and the silicon carbide brick layer (2) is filled with ramming material (3) having thermal conductivity. 2. The metallurgical furnace wall structure according to claim 1, characterized in that: the copper water jacket (5) is arranged at intervals in the silicon carbide brick layer (2) in such a way that it is arranged at intervals along the horizontal and/or vertical direction . 3. The furnace wall structure of a metallurgical furnace according to claim 1, characterized in that: the copper water jacket (5) and the cooling channel inside it are integrally formed, and the cooling liquid directly contacts the main body of the copper water jacket.