A hot blast stove fire dam wall body structure

Abstract

The utility model discloses a fire-resistant wall structure of a hot-blast stove, which belongs to the technical field of hot-blast stove walls. The structure comprises a "T"-shaped square beam and a "field"-shaped grid retaining wall, which are connected and combined to form an integral structure with a hollow lower part and a grid upper part. The "T"-shaped square beam is cast and formed at the connection part of the hot-blast stove and the rotary kiln according to the size of the mixing chamber cylinder of the hot-blast stove, with both ends embedded and cast in the side wall of the uptake flue, and the root embedded in the bottom cushion layer of the uptake flue, so as to be integrated with the uptake flue; the "field"-shaped grid retaining wall is built into a "field"-shaped grid by a plurality of high-alumina bricks, erected on the cross beam of the "T"-shaped square beam, and fixed by connecting rods with one end welded to the steel structure of the mixing chamber of the hot-blast stove and a baffle at the other end, so as to be closely connected and integrated with the mixing chamber of the hot-blast stove. The structure can block high-temperature flame, uniformly distribute and guide high-temperature flue gas, and prevent the high-temperature flue gas and flame from directly baking the kiln head area of the rotary kiln.

Description

Technical Field

[0001] The utility model relates to the technical field of hot-blast furnace walls, in particular to a fire-retaining wall structure for a hot-blast furnace. Background Art

[0002] The utility model relates to the technical field of hot-blast furnace walls, and particularly relates to hot-blast drying of copper concentrate by a rotary kiln. In the prior art, high-temperature flue gas generated by burning natural gas in a hot-blast furnace needs to bake copper concentrate in a rotary kiln to realize dehydration and drying, and the hot-blast furnace and the rotary kiln adopt a direct connection structure. This connection mode causes the high-temperature flue gas and high-temperature flame generated by the hot-blast furnace to directly bake the kiln head area of the rotary kiln. On one hand, it causes cracking and deformation of the heat-resistant baffle, material retaining plate and other parts of the rotary kiln due to overheating, which requires frequent maintenance; on the other hand, it causes the powdered copper concentrate in the kiln head area to burn, releasing SO2 gas, which affects the safe operation of the rotary kiln and the SO2 concentration in the tail exhaust flue gas after copper concentrate drying. Therefore, there is an urgent need for a fire-retaining wall structure for a hot-blast furnace to solve the above problems. Summary of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a fire-retaining wall structure for a hot-blast furnace, which solves the technical problems of overheating damage to heat-resistant baffles and material retaining plates at the kiln head of the rotary kiln caused by the direct connection between the hot-blast furnace and the rotary kiln, and abnormal SO2 in tail exhaust flue gas after copper concentrate drying.

[0004] To achieve the above objective, the utility model is implemented through the following technical solution: A fire-retaining wall structure for a hot-blast furnace comprises a T-shaped square beam, a baffle plate and a grid-shaped retaining wall in a tic-tac-toe configuration. The T-shaped square beam and the tic-tac-toe grid-shaped retaining wall are connected and combined to form an integral structure with a hollow lower part and a grid upper part.

[0005] Preferably: the beam length of the T-shaped square beam is 2.5 meters, and the height of the vertical column is 1 meter; Both ends of the T-shaped square beam are embedded into the side wall of the ascending flue for pouring, and the root is implanted into the bottom cushion layer of the ascending flue for pouring, so as to be integrated with the ascending flue.

[0006] Preferably: the tic-tac-toe grid-shaped retaining wall is built by a plurality of high-alumina bricks to form a 60mm×60mm tic-tac-toe grid.

[0007] Preferably: the tic-tac-toe grid-shaped retaining wall is fixed by connecting screws and the baffle plate, wherein one end of the connecting screw is welded to the steel structure of the mixing chamber of the hot-blast furnace, and the other end is matched with the baffle plate, so that the tic-tac-toe grid-shaped retaining wall is closely connected and integrated with the mixing chamber of the hot-blast furnace.

[0008] Compared with the prior art, the utility model has the following beneficial effects: The utility model realizes the cooperation between the lower hollow structure formed by the "T"-shaped square beam and the upper grid structure formed by the "field"-shaped grid retaining wall, which can not only effectively block high-temperature flame, but also uniformly distribute and conduct high-temperature flue gas, preventing high-temperature flue gas and high-temperature flame from directly baking the kiln head area of the rotary kiln, thereby solving the problem that the heat-resistant baffle, material baffle and other components of the rotary kiln head are damaged due to overheating, meanwhile reducing the combustion of powdered copper concentrate in the kiln head area, and improving the abnormal SO₂ concentration in the exhaust flue gas; Both ends of the "T"-shaped square beam are embedded into the side wall of the uptake flue for pouring, the root is embedded into the bottom cushion layer of the uptake flue for pouring, so that the "T"-shaped square beam is integrated with the uptake flue, greatly improving the structural firmness; the "field"-shaped grid retaining wall is fixed by a connecting screw one end of which is welded to the steel structure of the air mixing chamber of the hot-blast stove and a baffle at the other end, so that it is closely connected and integrated with the air mixing chamber of the hot-blast stove, effectively preventing the wall from cracking or even collapsing due to heating, and ensuring the stability of the overall structure; The hollow frame structure formed by the "T"-shaped square beam and the 60mm×60mm grid design of the "field"-shaped grid retaining wall can both ensure the smooth circulation of high-temperature flue gas and guarantee the normal progress of the copper concentrate drying process; The overall structure is simple, the construction is convenient, the use effect is good, the utility model is suitable for the fire retaining demand at the joint between the hot-blast stove and the rotary kiln, and has strong practical value. Description of Drawings

[0009] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it in accordance with the content of the description, the preferred embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0010] Figure 1 is a structural diagram of the utility model.

[0011] Description of reference numerals: 1. "T"-shaped square beam; 2. "field"-shaped grid retaining wall; 3. high-alumina brick; 4. baffle. Detailed Description

[0012] The embodiment of the present application provides a fire retaining wall structure for a hot-blast stove, which effectively solves the technical problems of overheating damage to heat-resistant baffles, material baffles and other components at the kiln head of the rotary kiln and abnormal SO₂ in tail exhaust flue gas after drying of copper concentrate caused by the direct connection between the hot-blast stove and the rotary kiln. Example

[0013] as shown in Figure 1 , the general idea of the technical solution in the embodiment of the present application is as follows: Aiming at the problems existing in the prior art, the utility model provides a fire-retaining wall structure of a hot-blast stove. The fire-retaining wall structure of the hot-blast stove of the utility model is mainly composed of a "T"-shaped square beam 1 and a "field"-shaped grid retaining wall 2, which are connected and combined to form an integral structure with a hollow lower part and a grid upper part, so as to realize the blocking of high-temperature flame and the diversion of high-temperature flue gas.

[0014] The "T"-shaped square beam 1 is formed by pouring at the connecting part of the hot-blast stove and the rotary kiln (that is, in the ascending flue) according to the size of the mixing chamber cylinder of the hot-blast stove. The specific dimensions are that the beam length is 2.5 meters and the height of the vertical column is 1 meter. In order to ensure the firmness of the square beam, both ends of the square beam are respectively embedded into the furnace walls on both sides of the ascending flue for pouring, and the root is implanted into the bottom cushion layer of the ascending flue for pouring, so that the "T"-shaped square beam 1 and the ascending flue are integrated in this way. At the same time, the hollow frame structure formed by the "T"-shaped square beam 1 can ensure the smooth circulation of high-temperature flue gas therein, and provide a passage for the subsequent flue gas to enter the rotary kiln.

[0015] The "field"-shaped grid retaining wall 2 is built on the cross beam of the "T"-shaped square beam 1, and is built by a plurality of high-alumina bricks 3, and the grid specification formed by building is a 60mm×60mm "field" shape. This grid structure can not only effectively block high-temperature flame and prevent the flame from directly impacting the kiln head area of the rotary kiln, but also enable the high-temperature flue gas to be uniformly distributed and diverted when passing through the grid, ensuring that the high-temperature flue gas smoothly enters the rotary kiln and ensuring the flow performance of the flue gas.

[0016] In order to ensure the stability of the "field"-shaped grid retaining wall 2, it is fixed through connecting screw rods and a baffle plate 4. Wherein, one end of the connecting screw rod is welded to the steel structure of the mixing chamber of the hot-blast stove, and the other end is matched with the baffle plate 4 to firmly fix the "field"-shaped grid retaining wall 2, so that it is closely connected and integrated with the mixing chamber of the hot-blast stove. This fixing method can greatly improve the stability of the wall body and effectively avoid the problem of cracking or even collapse of the wall body due to heating.

[0017] In summary, through the cooperation of the lower hollow structure formed by the "T"-shaped square beam 1 and the upper grid structure formed by the "field"-shaped grid retaining wall 2, the utility model can not only block high-temperature flame from directly baking the kiln head area of the rotary kiln, but also uniformly distribute and divert high-temperature flue gas, which solves the problems of overheating damage of the heat-resistant baffle and retaining plate of the rotary kiln head and abnormal SO2 in the tail exhaust flue gas after copper concentrate drying, and has the advantages of simple overall structure, convenient construction, good use effect and strong practicability.

[0018] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A fire-resistant wall structure for a hot blast stove, characterized in that, Comprises a "T"-shaped square beam (1), a baffle plate (4) and a "tian"-shaped grid retaining wall (2), wherein the "T"-shaped square beam (1) and the "tian"-shaped grid retaining wall (2) are connected and combined to form an overall structure with a hollow lower part and a gridded upper part.

2. The hot blast stove fire baffle wall structure according to claim 1, characterized in that: The beam length of the "T"-shaped square beam (1) is 2.5 meters, and the height of the vertical column is 1 meter; Both ends of the "T"-shaped square beam (1) are embedded into the side walls of the uptake flue for pouring, and the root part is implanted into the bottom cushion layer of the uptake flue for pouring, so as to be integrated with the uptake flue.

3. The hot blast stove fire baffle wall structure according to claim 2, characterized in that: The "tian"-shaped grid retaining wall (2) is built by a plurality of high-alumina bricks (3) into a "tian"-shaped grid of 60mm×60mm; The "tian"-shaped grid retaining wall (2) is fixed through connecting screw rods and the baffle plate (4), wherein one end of each connecting screw rod is welded to the steel structure of the mixing chamber of the hot-blast stove, and the other end is matched with the baffle plate (4), so that the "tian"-shaped grid retaining wall (2) is closely connected and integrated with the mixing chamber of the hot-blast stove.

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