Atomization cooling supercharging device of front tapping machine of ironmaking furnace

Abstract

The invention discloses an atomization cooling supercharging device for a front tapping machine of an iron making furnace. The atomization cooling supercharging device comprises a water storage tank, and an overflow pipe is arranged in the water storage tank; the overflow pipe is arranged in the height direction of the water storage tank, and a plurality of overflow holes are formed in the overflow pipe; an inlet of the overflow pipe is connected with a mixing pipe; an inlet of the mixing pipe is connected to an air compression header pipe; the mixing pipe is also connected with a water inlet pipe; the top of the water storage tank is connected to an air inlet pipeline of the tapping machine through a steam outlet pipe; compressed air and water are mixed through the mixing pipe and then discharged into the water storage tank through the overflow pipe, then the compressed air floats upwards in the water storage tank, and finally the compressed air containing water vapor is fed into the air inlet pipeline of the tapping machine through the steam outlet pipe, so that cooling air of the tapping machine contains water, the temperature of the cooling air is reduced, and the service life of the tapping machine is prolonged. The cooling effect of the tapping machine drill rod is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of blast furnace ironmaking equipment, and in particular relates to an atomizing cooling and pressurizing device for an opening machine in front of an ironmaking furnace. Background Art

[0002] The taphole opening process is the process of using a hydraulic taphole opening machine to drill holes in high-temperature refractory slurry to form a molten iron channel about 2.6 meters long, and then drain the molten iron from the blast furnace to the molten iron ditch. The taphole opening machine is a key equipment in front of the blast furnace ironmaking furnace, and its equipment performance directly affects the production order of tapping in front of the furnace and the cost of consumables in front of the furnace.

[0003] The furnace mud gun and taphole opening machine of the iron-making blast furnace are set on the same side of the main trench. The drill bit and drill rod need to be replaced several times to open the taphole. This is mainly because when the taphole opening machine opens the taphole, the temperature of the taphole channel rises from 200℃ to 1400℃ as the drill rod goes deeper, which is a complex environment with multiple temperature gradients. The drill bit blade of the taphole opening machine is made of tungsten-cobalt cemented carbide, and its heat resistance is generally around 800℃. After the drill bit drills 2000mm into the taphole, the temperature of the gun mud has exceeded 800℃. If it drills further, the ambient temperature will soon reach above 1000℃.

[0004] The drill bit is subjected to the combined effects of high temperature and mechanical force. Under these conditions, the strength of the drill rod decreases and bends, the drilling efficiency decreases, the drill bit begins to show large shrinkage deformation, cracks appear between the blade and the cutter body, and the blade is easy to fall off from the cutter groove, causing the drill bit to fail. Especially when the iron mouth red hard layer is thick, due to the large amount of oxygen contained in the compressed air (the drill rod is a hollow structure, and compressed air is introduced into the interior during the drilling process to cool it down), the drill rod burns red, melts and breaks, and even cannot open the iron mouth. Summary of the invention

[0005] The purpose of the present invention is to provide an atomizing cooling and pressurizing device for an opening machine in front of an iron-making furnace, so as to provide atomizing steam for the opening machine and improve the cooling effect of the drill rod of the opening machine.

[0006] The present invention adopts the following technical scheme: an atomizing cooling and pressurizing device for an opening machine in front of an ironmaking furnace, comprising a water storage tank, wherein an overflow pipe is arranged in the water storage tank;

[0007] The overflow pipe is arranged along the height direction of the water storage tank, and a plurality of overflow holes are opened on the overflow pipe;

[0008] The inlet of the overflow pipe is connected with a mixing pipe;

[0009] The inlet of the mixing tube is connected to the air compressor main pipe;

[0010] The mixing tube is also connected with a water inlet pipe;

[0011] The top of the water storage tank is connected to the air inlet pipeline of the opening machine through a steam outlet pipe.

[0012] Furthermore, the overflow pipe is arranged vertically, and the portion thereof located inside the water tank is provided with overflow holes spaced apart along the height direction.

[0013] Furthermore, the top of the overflow pipe passes through and extends out of the top of the water storage tank, and an exhaust valve is installed at the top of the overflow pipe.

[0014] Furthermore, the mixing tube and the overflow tube are integrally formed.

[0015] Furthermore, the water inlet pipe is located above the mixing pipe, and the axes of the two intersect.

[0016] Furthermore, an air supply pipe is connected to the top of the water tank, and the air supply pipe is connected to the air compression main pipe.

[0017] Furthermore, a liquid level pipe is connected to the outside of the water storage barrel;

[0018] The top of the liquid level tube is connected to the top of the water storage bucket.

[0019] The bottom end of the liquid level pipe is communicated with the bottom end of the water storage barrel.

[0020] Furthermore, a sewage outlet is provided at the bottom end of the water storage tank.

[0021] Furthermore, a drain outlet is provided at the bottom of the water tank.

[0022] Furthermore, a plurality of supporting legs are arranged below the water tank.

[0023] The beneficial effects of the present invention are as follows: the present invention mixes compressed air with water through a mixing tube, and after mixing, the compressed air is discharged into a water storage tank through an overflow pipe, then the compressed air floats in the water storage tank, and finally the compressed air containing water vapor is sent into the air inlet pipeline of the opening machine through a steam outlet pipe, so that the cooling gas of the opening machine contains moisture, the cooling gas temperature is reduced, and the cooling effect of the drill rod of the opening machine is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The present invention is a schematic structural diagram of an atomizing cooling and pressurizing device for an opening machine in front of an ironmaking furnace according to an embodiment of the present invention.

[0025] Among them: 11. water storage tank; 12. mixing pipe; 13. water inlet pipe; 14. overflow pipe; 15. air supply pipe; 16. steam outlet pipe; 17. liquid level pipe; 18. drainage pipe; 19. sewage pipe;

[0026] 20. Air compressor main pipe; 30. Opening machine. DETAILED DESCRIPTION

[0027] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] At present, the cooling medium of the drill bit of the hydraulic tapping machine (i.e., rock tapping machine) of blast furnace is mainly compressed air, which flows to the rock tapping machine-drill rod-drill bit through a branch pipeline to achieve ventilation cooling of the tapping operation. Due to the low pressure of compressed air, it is easy to get blocked during the tapping process, and the compressed air cannot be effectively circulated and cooled. Therefore, the drill bit of the hydraulic tapping machine is very easy to be damaged, which seriously affects the production rhythm.

[0029] The present invention discloses an atomizing cooling and pressurizing device for an opening machine in front of an ironmaking furnace. Figure 1 As shown, it includes a water tank 11, in which an overflow pipe 14 is arranged; the overflow pipe 14 is arranged along the height direction of the water tank 11, and a plurality of overflow holes are opened on the overflow pipe 14; the inlet of the overflow pipe 14 is connected to the mixing pipe 12; the inlet of the mixing pipe 12 is connected to the air compressor main pipe 20; the mixing pipe 12 is also connected to the water inlet pipe 13; the top of the water tank 11 is connected to the air inlet pipeline of the opening machine 30 through the steam outlet pipe 16.

[0030] The present invention mixes compressed air with water through a mixing tube, and after mixing, the compressed air is discharged into a water tank through an overflow pipe, then the compressed air floats in the water tank, and finally the compressed air containing water vapor is sent into an air inlet pipeline of the opening machine through a steam outlet pipe, so that the cooling gas of the opening machine contains moisture, the cooling gas temperature is reduced, and the cooling effect of the drill rod of the opening machine is improved.

[0031] In the present invention, the water storage tank 11 can be a cylindrical water storage tank, and only requires good airtightness of the water storage tank. The overflow pipe 14 can be made of a seamless pipe, and in this embodiment, a seamless pipe of φ57 is used. Therefore, the mixing tube 12 is made of a seamless pipe of φ57. During processing, the two can be processed into one piece (that is, the mixing tube 12 and the overflow pipe 14 are formed in one piece), which can increase the strength. By designing the mixing tube 12, the water-gas mixture can be fully mixed before entering the mixing water tank 11, so that there is enough water vapor mixed in the compressed air, thereby improving the cooling effect.

[0032] In one embodiment, the overflow pipe 14 is vertically arranged, and the portion of the overflow pipe 14 located inside the water storage tank 11 is provided with overflow holes at intervals along the height direction. Specifically, the overflow pipe 14 is vertically arranged in the middle of the water storage tank 11, and the outer circumference of the same cross section is provided with overflow holes at intervals, and the air and water mixture overflows from the overflow holes, and the compressed air containing water vapor is sent upward through the steam outlet pipe 16 into the cooling pipeline of the opening machine, and the water falls downward to the bottom of the water storage tank.

[0033] More specifically, overflow holes are arranged at intervals in the axial direction of the overflow pipe 14 to ensure the overflow of water and gas, so as to facilitate the adjustment of the pressure of each device in the system. Preferably, when the height of the water storage tank 11 is about 550 mm, a row of overflow holes can be arranged at intervals of 50 mm, and each row of overflow holes has four holes in the circumferential direction.

[0034] As a specific implementation form, the top of the overflow pipe 14 passes through and extends out of the top of the water storage tank 11, and an exhaust valve is installed at the top of the overflow pipe 14. Through the setting of the exhaust valve, when the pressure in the water storage tank 11 is too high, the exhaust valve can be opened to exhaust and reduce the pressure.

[0035] In the present invention, the water inlet pipe 13 is located above the mixing pipe 12, and the axes of the two intersect. Figure 1 The angle between the axes of the two is 45°. When water flows from the water inlet pipe 13 into the mixing tube 12, it falls downward from the top of the mixing tube 12 under the action of gravity, and the air entering from the right side intersects with the falling water flow, so that water vapor is mixed in the air, increasing the water vapor content in the air, thereby improving the cooling effect of the drill pipe of the opening machine.

[0036] The top of the water tank 11 is connected with an air supply pipe 15, which is connected to the air pressure main pipe. The air supply pipe 15 can be used to supplement the pressure in the water tank 11, so as to keep the pressure in the water tank 11 at the expected pressure.

[0037] In addition, the outside of the water storage tank 11 is connected with a liquid level pipe 17; the top of the liquid level pipe 17 is connected to the top of the water storage tank 11, and the bottom of the liquid level pipe 17 is connected to the bottom of the water storage tank 11. The liquid level pipe 17 adopts a common PU pipe, which is arranged vertically and is in the same height direction as the water storage tank and is connected, so that it is convenient to check the water level in the water storage tank in real time. A PU pipe quick plug can be installed at the connection point for quick connection.

[0038] In one embodiment, a sewage outlet is provided at the bottom of the water storage tank 11, and a drainage outlet is provided at the bottom of the water storage tank 11. The sewage and drainage of the water storage tank 11 can be achieved through the sewage outlet and the drainage pipe.

[0039] For the convenience of operation, a plurality of supporting legs are provided below the water tank 11, and the water tank 11 is suspended to facilitate the connection of pipelines.

[0040] In summary, the atomizing cooling device of the opening machine of the present invention is composed of an air duct, a water pipe and a water storage tank 11, and the steam outlet pipe 16 is connected to the opening machine to provide cooling atomizing steam for the opening machine drill rod. A valve is installed on each pipe, and the water level can be observed through the PU pipe outside the water storage tank 11. The other end is connected to the air duct, and the original opening airway is used to send water mist to the drill rod and drill bit to achieve a cooling effect, reduce the consumption of the drill bit and drill rod, and reduce the cost of spare parts.

[0041] When opening the taphole, the cooling water and compressed air are mixed to produce a fine and uniform water mist, which can also suppress the smoke and dust generated when opening the taphole, thereby reducing dust pollution. At the same time, it enhances the cooling effect on the tapping machine, drill rod and drill bit, prolongs the service life of the rock drill, and reduces the consumption of drill rods and drill bits.

Claims

1. An atomizing cooling and pressurizing device for an opening machine in front of an ironmaking furnace, characterized in that: It comprises a water storage tank (11), wherein an overflow pipe (14) is arranged in the water storage tank (11); The overflow pipe (14) is arranged along the height direction of the water storage tank (11), and a plurality of overflow holes are opened on the overflow pipe (14); The inlet of the overflow pipe (14) is connected to a mixing pipe (12); The inlet of the mixing tube (12) is connected to the air compression main pipe (20); The mixing tube (12) is also connected to a water inlet pipe (13); The top of the water storage tank (11) is connected to the air inlet pipeline of the opening machine (30) through a steam outlet pipe (16).

2. The atomizing cooling and pressurizing device for the front opening machine of an ironmaking furnace as claimed in claim 1, characterized in that: The overflow pipe (14) is arranged vertically, and the portion of the overflow pipe located inside the water storage tank (11) is provided with the overflow holes spaced apart in the height direction.

3. The atomizing cooling and pressurizing device for the front opening machine of an ironmaking furnace as claimed in claim 2, characterized in that: The top of the overflow pipe (14) passes through and extends out of the top of the water storage tank (11), and an exhaust valve is installed at the top of the overflow pipe (14).

4. The atomizing cooling and pressurizing device for the front opening machine of an ironmaking furnace as claimed in claim 2 or 3, characterized in that: The mixing tube (12) and the overflow tube (14) are integrally formed.

5. The atomizing cooling and pressurizing device for the front opening machine of an ironmaking furnace as claimed in claim 4, characterized in that: The water inlet pipe (13) is located above the mixing pipe (12), and the axes of the two intersect.

6. The atomizing cooling and pressurizing device for the front opening machine of an ironmaking furnace as claimed in claim 4, characterized in that: The top of the water storage tank (11) is connected to an air supply pipe (15), and the air supply pipe (15) is connected to an air compression main pipe.

7. The atomizing cooling and pressurizing device for the front opening machine of an ironmaking furnace as claimed in claim 1, characterized in that: The outside of the water storage barrel (11) is connected to a liquid level pipe (17); The top end of the liquid level pipe (17) is connected to the top end of the water storage bucket (11). The bottom end of the liquid level pipe (17) is in communication with the bottom end of the water storage barrel (11).

8. The atomizing cooling and pressurizing device for the front opening machine of an ironmaking furnace as claimed in claim 7, characterized in that: The bottom end of the water storage tank (11) is provided with a sewage outlet.

9. The atomizing cooling and pressurizing device for the front opening machine of an ironmaking furnace as claimed in claim 8, characterized in that: A drainage outlet is provided at the bottom of the water storage tank (11).

10. The atomizing cooling and pressurizing device for the front opening machine of an ironmaking furnace as claimed in claim 9, characterized in that: A plurality of supporting legs are arranged below the water storage tank (11).

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