Blast furnace stokehole swinging sliding nozzle baking device

Abstract

The utility model relates to the technical field of blast furnace swing spout baking equipment, and particularly discloses a blast furnace stokehole swing spout baking device which comprises a covering plate and a gas pipeline, the covering plate covers a swing spout, the size of the covering plate is consistent with that of the swing spout, a through hole is formed in the covering plate, a gas branch pipe penetrates through the through hole, and the gas branch pipe is connected with the gas pipeline. Combustion nozzles are mounted at the end parts of the gas conveying branch pipes and extend into the refractory material preformed holes; during baking, only the two steel pipes need to be connected; after the cover plate is manufactured to serve as the shield, the swing nozzle is repaired after the assembly line is off line, the roaster and the steel plate shield do not need to be welded and manufactured by personnel, swing nozzle roasting operation can be achieved through direct hoisting, and the maintenance cost is reduced; the steel pipe for natural gas is connected and embedded in the refractory material, high-temperature deformation of the steel plate is prevented, natural gas flames are pressed through the full-covering swing sliding nozzle, baking of the swing sliding nozzle can be completed in three days, the natural gas consumption of each swing sliding nozzle is saved by two days, energy is saved, and the baking work efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace swing spout baking equipment, in particular to a blast furnace front swing spout baking device. Background Art

[0002] Baking out the swinging spout at the front of a blast furnace (BF) refers to the process of baking out the swinging spout (also known as the swinging flow nozzle or swinging taphole), the device used for tapping iron during the blast furnace's production process. This process ensures smooth tapping and prevents problems such as molten iron solidification caused by low temperatures. 1. Function of the Swinging Spout: The swinging spout is a key component connecting the blast furnace to the molten iron ladle, primarily used to control the speed and direction of molten iron flow from the blast furnace. When tapping is required, the swinging spout is opened and adjusted to the appropriate angle to direct the molten iron into the designated ladle. 2. Purpose of Baking Out: Maintaining high temperatures: Ensures smooth molten iron flow and prevents solidification due to temperature drops during tapping. Preventing Oxidation: High temperatures reduce the molten iron's exposure to oxygen, preventing oxidation. Extending Lifespan: Baking out reduces thermal stress, helping to extend the service life of the swinging spout and its associated components. 3. Baking Out Method: Fuel Selection: Commonly used fuels include gas (such as blast furnace gas and coke oven gas) and heavy oil. Modern blast furnaces increasingly use coal gas as fuel because it's clean and easy to control. Combustion Equipment: Use specialized baking devices, such as spray guns and flamethrowers, to ensure even flame coverage of the nozzle surface. Temperature Control: Adjust the fuel supply to control the baking temperature, ensuring it's appropriate but not excessively high, which could damage the equipment.

[0003] The swinging spout used in front of the furnace needs to be taken offline and re-cast 40 days after it is put into operation. After casting, it needs to be baked with natural gas. The baking of the swinging spout needs to be connected to natural gas using a baker. The production of the baker requires about 1 ton of steel pipe. After the natural gas is connected to the baker, the swinging spout is open in design and the natural gas flame will spray upwards. A steel plate is needed to make a shield to suppress the natural gas flame so that the natural gas can fully bake the refractory material inside the swinging spout.

[0004] The existing blast furnace swing nozzle baking has the following problems:

[0005] 1. The roaster is subjected to high temperature baking, which leads to frequent replacement. Each time a swing nozzle is baked, about 0.5 tons of steel pipe is used.

[0006] 2. The steel plate is severely deformed after suppressing the natural gas flame. The steel plate shield needs to be remade when each swing nozzle is baked off the line. About 10 tons of steel plates are needed for shield production every year.

[0007] 3. Due to the gap between the steel plate shield and the swinging nozzle, it is difficult to completely suppress the natural gas flame, causing the swinging nozzle to bake for up to 5 days, wasting natural gas.

[0008] 4. It takes 3 people 3 days to make the baking device and steel plate shield for each swinging spout, which is low in work efficiency.

[0009] Therefore, there is an urgent need to design a blast furnace front swing nozzle baking device to solve the problems of frequent replacement of existing blast furnace swing nozzle baking devices, resulting in material waste and low work efficiency. Utility Model Content

[0010] In view of the problems existing in the prior art, the purpose of the utility model is to provide a blast furnace front swing nozzle baking device.

[0011] The technical solution adopted by the utility model to solve its technical problems is: a blast furnace front swing spout baking device, including a covering plate and a gas pipeline, the covering plate covers the swing spout, the size of the covering plate is consistent with the swing spout, the covering plate is provided with a through hole, the gas branch pipe passes through the through hole, a combustion nozzle is installed at the end of the gas branch pipe, and the combustion nozzle extends into the reserved hole of the refractory material.

[0012] Specifically, a swing nozzle refractory material is provided on the upper portion of the swing nozzle, and a covering plate is placed on the swing nozzle refractory material.

[0013] Specifically, two refractory pre-holes are provided on the swing nozzle refractory material, and two through holes are provided on the cover plate, and the positions of the refractory pre-holes correspond to the positions of the through holes.

[0014] Specifically, there are two gas branch pipes, the upper part of the gas branch pipes is connected to the gas pipeline, and a combustion nozzle is installed at the bottom of the gas branch pipe, and the combustion nozzle is located in the middle of the reserved hole of the refractory material.

[0015] Specifically, the combustion nozzle adopts an electrode ignition structure.

[0016] Specifically, the reserved hole in the refractory material passes through the swing nozzle refractory material.

[0017] The utility model has the following beneficial effects:

[0018] The swinging spout baking device designed by the utility model in front of the blast furnace eliminates the use of a baking device. Only two steel pipes need to be connected during baking, saving 0.5 tons of steel pipe cost. After making a covering plate as a shield, about 10 tons of steel for making a steel plate shield can be saved each year. Each time the swinging spout is taken offline for repair, there is no need for personnel to weld and make a baking device and a steel plate shield. The swinging spout baking operation can be performed by directly hoisting, thereby reducing maintenance costs.

[0019] The utility model is designed to realize the blast furnace front swinging spout baking device. The steel pipe for connecting natural gas is pre-buried in the refractory material to prevent the steel plate from being deformed by high temperature. The fully covered swinging spout is used to suppress the natural gas flame. The baking of the swinging spout can be completed in 3 days. Each swinging spout saves 2 days of natural gas usage, saves energy and improves the baking efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the installation structure of the swinging spout baking device in front of the blast furnace.

[0021] Figure 2 is a top view of the cover plate.

[0022] In the figure: 1-covering plate; 2-gas transmission pipeline; 3-gas transmission branch pipe; 4-burner nozzle; 5-through hole; 6-swinging nozzle; 7-swinging nozzle refractory; 8-reserved hole for refractory. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely further describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] like Figure 1-Figure 2 As shown, a blast furnace front swing spout baking device includes a covering plate 1, a gas pipeline 2, a gas branch pipe 3, a combustion nozzle 4, a through hole 5 and a refractory reserved hole 8. The covering plate 1 covers the swing spout 6, and the size of the covering plate 1 is consistent with the swing spout 6.

[0025] A swing nozzle refractory material 7 is provided on the upper portion of the swing nozzle 6, and a cover plate 1 is placed on the swing nozzle refractory material 7.

[0026] A through hole 5 is provided on the cover plate 1 , through which a gas branch pipe 3 passes. A combustion nozzle 4 is installed at the end of the gas branch pipe 3 , and the combustion nozzle 4 extends into a hole 8 reserved in the refractory material.

[0027] The refractory reserved hole 8 passes through the swing nozzle refractory 7.

[0028] Two refractory reserved holes 8 are provided on the swing nozzle refractory 7, and two through holes 5 are provided on the cover plate 1. The positions of the refractory reserved holes 8 correspond to the positions of the through holes 5.

[0029] There are two gas branch pipes 3, the upper part of which is connected to the gas pipeline 2, and the bottom of which is installed with a combustion nozzle 4, which is located in the middle of the refractory reserved hole 8. The gas branch pipe 3 and the gas pipeline 2 are both made of steel pipe.

[0030] The combustion nozzle 4 adopts an electrode ignition structure.

[0031] The operating principle of this utility model:

[0032] 1. Eliminate the use of baking devices. When baking, only two steel pipes need to be connected, saving 0.5 tons of steel pipe costs.

[0033] 2. After making the covering plate as the shield, the covering plate is consistent in size with the swinging nozzle, which can save about 10 tons of steel for making the steel plate shield every year.

[0034] 3. Every time the swing spout is repaired after the machine is offline, there is no need for personnel to weld and make the baking device and steel plate shield. The swing spout baking operation can be performed by directly hoisting, which reduces maintenance costs.

[0035] 4. The steel pipe (gas branch pipe 3) for connecting natural gas is pre-buried in the refractory material to prevent the steel plate from deforming at high temperature. A fully covered swinging nozzle is used to suppress the natural gas flame. The baking of the swinging nozzle can be completed in 3 days. Each swinging nozzle saves 2 days of natural gas usage, saves energy, and improves baking efficiency.

[0036] The present invention is not limited to the above-mentioned embodiments. Anyone should be aware of the structural changes made under the inspiration of the present invention. Any technical solution that is the same or similar to the present invention falls within the scope of protection of the present invention.

[0037] The technology, shape and structure that are not described in detail in this utility model are all well-known technologies.

[0038] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A blast furnace front swing nozzle baking device, characterized in that: It includes a covering plate and a gas pipeline. The covering plate covers the swinging nozzle. The size of the covering plate is consistent with the swinging nozzle. A through hole is provided on the covering plate. The gas branch pipe passes through the through hole. A combustion nozzle is installed at the end of the gas branch pipe, and the combustion nozzle extends into the reserved hole in the refractory material.

2. The blast furnace front swing spout baking device according to claim 1, characterized in that: A swinging nozzle refractory material is provided on the upper portion of the swinging nozzle, and a covering plate is placed on the swinging nozzle refractory material.

3. The blast furnace front swing nozzle baking device according to claim 2, characterized in that: The swing nozzle refractory is provided with two refractory reserved holes, and the cover plate is provided with two through holes, and the positions of the refractory reserved holes correspond to the positions of the through holes.

4. The blast furnace front swing spout baking device according to claim 1, characterized in that: There are two gas branch pipes, the upper part of the gas branch pipes is connected to the gas pipeline, and the bottom of the gas branch pipes is equipped with a combustion nozzle, which is located in the middle of the reserved hole of the refractory material.

5. The blast furnace front swing spout baking device according to claim 1, characterized in that: The combustion nozzle adopts an electrode ignition structure.

6. The blast furnace front swing spout baking device according to claim 1, characterized in that: The refractory material reserved hole passes through the swing nozzle refractory material.

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