Smelting furnace wall flue slag removal expansion pipe

Abstract

The utility model discloses a smelting furnace wall flue slag removal expansion pipe, which comprises a blasting pipe and an extension pipe, liquid carbon dioxide is filled in the blasting pipe, one end of the blasting pipe is provided with a heating device, one end of the extension pipe is sleeved on the outer side of one end of the blasting pipe provided with the heating device, the blasting pipe extends into a smelting furnace during slag removal, and the extension pipe extends into the smelting furnace during slag removal. And during slag removal, the outer side of the pipe body part, extending into the smelting furnace, of the expansion pipe is wrapped with a heat insulation layer. The blast pipe has the advantages that the expansion pipe is suitable for high-temperature environments such as a furnace wall or a flue, the blast pipe can directly extend into the smelting furnace wall or the flue during slag removal, the blast pipe can directly explode in slag, the slag removal effect is good, high temperature in the smelting furnace or the flue can be effectively blocked through the arrangement of the heat insulation layer, and the service life of the blast pipe is prolonged. And time is reserved for installation of the expansion pipe, evacuation of workers and detonation and slag removal.

Description

Technical Field

[0001] The utility model relates to the technical field of smelting slag cleaning, in particular to a smelting furnace wall flue slag cleaning expansion tube. Background Art

[0002] Molten pool smelting is a commonly used metallurgical process in the metallurgical process. This smelting method often uses compressed air to strongly stir the molten pool so that the oxidation or reduction reaction in the melt can proceed rapidly. During the smelting process, the airflow will splash a large amount of high-temperature molten material onto the furnace wall or the subsequent ascending flue, resulting in severe coking in the furnace wall or flue, and a thick slag layer attached to the furnace wall or flue wall, affecting the temperature or pressure in the smelting furnace. Therefore, it is necessary to regularly clean the furnace wall or flue.

[0003] Traditional slag removal methods mainly include mechanical slag removal, continued combustion, and blasting slag removal. Mechanical slag removal requires stopping the furnace for cooling, and manual mechanical slag removal is performed after the furnace cools down, which is time-consuming and labor-intensive, and the slag removal efficiency is low. Continuous combustion usually uses diesel or natural gas to heat the flue gas temperature to above the melting point of the binder, so that the binder melts and flows into the furnace. It is difficult to completely melt the high-melting-point metal oxides, and if the slag layer is thick, the slag removal cost will be significantly increased. Blasting slag removal is mostly done by explosive blasting, and blasting explosives require strict management, resulting in high management and preservation costs. Carbon dioxide fracturing devices have appeared on the market, which mainly use liquid carbon dioxide to change phase in a limited space. The gasification pressure rises instantly to form high-pressure and high-energy gas to achieve a directional blasting effect. Carbon dioxide fracturing is a physical conversion process, and has the advantages of no open flames or arcs in the blasting process, strong blasting power, no need for gun inspection, simple operation, and low cost. However, slag cleaning from smelting furnace walls or flues is different from rock fracturing. The smelting furnace walls or flues are in high-temperature environments, and conventional carbon dioxide fracturing devices cannot be used in high-temperature environments. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a smelting furnace wall flue slag cleaning expansion tube, which is suitable for high temperature environments such as furnace walls or flues. When cleaning slag, the blasting tube can be directly extended into the smelting furnace wall or flue, and the blasting tube can directly explode in the slag, with good slag cleaning effect. In addition, the setting of the heat insulation layer can effectively block the high temperature in the smelting furnace or flue, leaving time for the installation of the expansion tube, the evacuation of staff and the detonation of slag cleaning.

[0005] The purpose of the utility model is achieved through the following technical measures: a smelting furnace wall flue slag cleaning expansion tube, comprising a bursting tube and an extension tube, the bursting tube is filled with liquid carbon dioxide, one end of the bursting tube is provided with a heating device, one end of the extension tube is sleeved on the outside of the end of the bursting tube provided with the heating device, when slag cleaning, the bursting tube extends into the smelting furnace, and when slag cleaning, the outer side of the tube body part of the expansion tube extending into the smelting furnace is wrapped with a heat insulation layer.

[0006] Furthermore, the blasting tube comprises a blasting tube body, both ends of the blasting tube body are open, one end is connected to a filling head, and the other end is connected to a fixing head, and the heating device is connected to the fixing head.

[0007] Furthermore, the filling head and the fixing head are both welded to the blasting tube body.

[0008] Furthermore, the welding adopts argon arc welding or double arc welding, the number of welding circles is more than 2 circles, the welding groove angle is 40-80°, and the tube wall of the blasting tube body is welded through.

[0009] Furthermore, the filling head is provided with an air filling channel and an air sealing valve, and the air sealing valve is a pin-type air sealing valve or a screw-type air sealing valve.

[0010] Furthermore, when it is a pin-type air sealing valve, one end of the inflation channel is connected to the blasting tube body, and the other end is connected to the pin-type air sealing valve. The pin-type air sealing valve includes a valve body and a valve core. An air flow channel is provided in the valve body, and the valve core is inserted into the outlet end of the air flow channel.

[0011] Furthermore, when it is a screw-type air sealing valve, the inflation channel includes an installation channel and an air inlet channel, the installation channel passes through the inflation head and is connected with the blasting tube body, the air inlet channel is connected with the installation channel through the air inlet, and the screw-type air sealing valve includes a screw body, a sealing ring is mounted on the screw body, the screw body is used in conjunction with the installation channel, and the sealing ring is used in conjunction with the air inlet.

[0012] Furthermore, a combined gasket is provided between the fixing head and the heating device.

[0013] Furthermore, the heating device includes a mounting seat, which is provided with two conductive studs passing through the mounting seat, the ends of the two conductive studs on one side of the mounting seat are connected by tungsten wires, and the ends of the two conductive studs on the other side of the mounting seat are respectively connected to conductive wires by bolts, and a rubber gasket is provided between the end of the conductive stud connected to the tungsten wire and the mounting seat, and an insulating sleeve is also provided on the outside of the conductive stud located in the mounting seat.

[0014] Furthermore, the heating device also includes a medicine tube, which is sleeved on the outside of the tungsten wire and connected to the mounting seat, and the outside of the medicine tube is also wrapped with a heat insulation layer.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: when the expansion tube of the present application is used for slag cleaning, the blasting tube is directly extended into the smelting furnace wall or flue, and the blasting tube can directly explode in the slag, which has a good slag cleaning effect. Moreover, the setting of the heat insulation layer can effectively block the high temperature in the smelting furnace or flue, which can save time for the installation of the expansion tube, the evacuation of the staff, and the detonation of slag cleaning. The filling head and the fixed head are connected to the blasting tube by the welding method of the present application, which can ensure that when slag cleaning, the blasting tube explodes from the tube body instead of the part where the filling head and the fixed head are welded to the blasting tube, which can ensure the explosion power and effective slag cleaning. The setting of the inflation channel and the air sealing valve can realize immediate use without pre-charging, thereby reducing storage management costs. The present application can prevent carbon dioxide from leaking from the heating device and affecting the slag cleaning effect by setting a combination gasket and a rubber gasket.

[0016] The utility model is described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] Figure 2 It is a structural schematic diagram of an expansion tube with a screw-type sealing valve.

[0019] Figure 3 yes Figure 2 Magnified view of area A.

[0020] Figure 4 yes Figure 2 Magnified view of area B.

[0021] Figure 5 It is a schematic diagram of the structure of an expansion tube with a pin-type air sealing valve and not wrapped with a heat insulation layer.

[0022] Figure 6 yes Figure 5 Magnified view of area C in the middle.

[0023] Among them, 1. blasting tube body, 2. extension tube, 3. filling head, 4. fixing head, 5. insulation layer, 6. installation channel, 7. air inlet channel, 8. screw body, 9. sealing ring, 10. mounting seat, 11. combination gasket, 12. conductive stud, 13. bolt, 14. conductive wire, 15. rubber gasket, 16. tungsten wire, 17. insulating sleeve, 18. filling channel, 19. valve body, 20. air flow channel, 21. valve core, 22. sealing. DETAILED DESCRIPTION

[0024] like Figures 1 to 6As shown, a smelting furnace wall flue slag cleaning expansion tube includes a bursting tube and an extension tube 2, wherein the bursting tube is filled with liquid carbon dioxide, a heating device is provided at one end of the bursting tube, and one end of the extension tube 2 is sleeved on the outside of the end of the bursting tube provided with the heating device, and the extension tube 2 can play the role of extending the bursting tube, and the conductive wire 14 of the heating device can be laid in the extension tube 2 and extended out of the extension tube 2 to connect with the power supply. When cleaning slag, the bursting tube extends into the smelting furnace, and when cleaning slag, the outer side of the tube body part of the expansion tube extending into the smelting furnace is wrapped with a heat insulation layer 5. Specifically, the tube body part wrapped by the heat insulation layer 5 includes the entire bursting tube and part of the extension tube 2, and the heat insulation layer 5 can be one or more of fireproof mud, high temperature resistant coating, and high temperature resistant gel layer. When the expansion tube of the present application is used for slag cleaning, the blasting tube is directly extended into the smelting furnace wall or the flue, and the blasting tube can directly explode in the slag, which has a good slag cleaning effect. In addition, the setting of the thermal insulation layer 5 can effectively block the high temperature in the smelting furnace or the flue, leaving time for the installation of the expansion tube, the evacuation of the staff, and the detonation of slag cleaning.

[0025] The blasting tube comprises a blasting tube body 1, which is open at both ends, one end of which is connected to a filling head 3, and the other end is connected to a fixing head 4, and the heating device is connected to the fixing head 4. Further preferably, the wall thickness of the blasting tube body 1 is 3.5-12 mm, and the extension tube 2 is sleeved on the outside of the fixing head 4.

[0026] The charging head 3 and the fixing head 4 are both welded to the blasting tube body 1. Further, the welding adopts argon arc welding or double arc welding, the number of welding circles is more than 2 circles, the welding groove angle is 40-80°, preferably, the welding groove angle is 45°, and the tube wall of the blasting tube body 1 is welded through. The charging head 3 and the fixing head 4 are connected to the blasting tube body 1 by the welding method of the present application, which can ensure that when slag is cleared, the blasting tube explodes from the blasting tube body 1, rather than from the part where the charging head 3 and the fixing head 4 are welded to the blasting tube body 1, which can ensure the explosion power and effective slag clearing.

[0027] The filling head 3 is provided with a gas filling channel 18 and a gas sealing valve, and the gas sealing valve is a pin-type gas sealing valve or a screw-type gas sealing valve. Liquid carbon dioxide can be filled into the blasting tube through the gas filling channel 18, and the gas sealing valve can be used to seal the gas filling channel 18 after filling. The gas filling channel 18 and the gas sealing valve can be used immediately after filling without pre-filling, thereby reducing storage management costs.

[0028] In case of a pin-type sealing valve, one end of the inflation channel 18 is connected to the bursting tube body 1, and the other end is connected to the pin-type sealing valve, which includes a valve body 19 and a valve core 21. The valve body 19 is provided with an airflow channel 20, and the valve core 21 is inserted at the outlet end of the airflow channel 20. During filling, the liquid supply device is connected to the inlet end of the airflow channel 20, and the valve core 21 at the outlet end of the airflow channel 20 is pushed out by the pressure of the liquid supply device, and the liquid carbon dioxide enters the bursting tube body 1 from the airflow channel 20. After the filling is completed, the liquid supply device is closed, and the pressure at the inlet end of the airflow channel 20 is reduced to be lower than the pressure in the bursting tube body 1. The pressure in the bursting tube body 1 presses the valve core 21 back into the airflow channel 20 to achieve the sealing of the airflow channel 20.

[0029] When it is a screw-type air sealing valve, the inflation channel 18 includes an installation channel 6 and an air inlet channel 7. The installation channel 6 passes through the filling head 3 and is connected with the bursting tube body 1. The air inlet channel 7 is connected with the installation channel 6 through the air inlet. The screw-type air sealing valve includes a screw body 8. A sealing ring 9 is mounted on the screw body 8. The screw body 8 is used in conjunction with the installation channel 6, and the sealing ring 9 is used in conjunction with the air inlet. Specifically, the screw body 8 can be screwed in or out of the installation channel 6, and the sealing ring 9 is used to seal the air inlet. During filling, the screw body 8 is screwed out from the installation channel 6 until the sealing ring 9 is located between the air inlet and the inlet end of the installation channel 6, so that the air inlet channel-air inlet-installation channel-blasting tube channel is connected, and the liquid supply device fills liquid carbon dioxide into the blasting tube body 1. After the filling is completed, the liquid supply device is closed, and the screw body 8 is screwed into the installation channel 6 between the sealing ring 9 and the outlet end of the installation channel 6, and the sealing ring 9 seals the installation channel 6 between the air inlet and the blasting tube body 1.

[0030] A combined gasket 11 is provided between the fixed head 4 and the heating device, and the combined gasket 11 is used to achieve sealing between the heating device and the fixed head 4 to prevent leakage of carbon dioxide.

[0031] The heating device includes a mounting seat 10, on which two conductive studs 12 passing through the mounting seat 10 are arranged, the ends of the two conductive studs 12 on one side of the mounting seat 10 are connected by tungsten wires 16, the ends of the two conductive studs 12 on the other side of the mounting seat 10 are respectively connected to conductive wires 14 by bolts 13, a rubber gasket 15 is also arranged between the ends of the conductive studs 12 connected to the tungsten wires 16 and the mounting seat 10, and an insulating sleeve 17 is also set on the outer side of the conductive studs 12 located in the mounting seat 10. Specifically, the mounting seat 10 is connected to the fixed head 4, and a combined gasket 11 is arranged between the mounting seat 10 and the fixed head 4. The tungsten wire 16 can be heated by the conductive wire-conductive stud-tungsten wire to provide heat. By tightening the bolts 13 on the conductive studs 12, the rubber gasket 15 can be clamped between the conductive studs 12 and the mounting seat 10 to achieve sealing between the conductive studs 12 and the mounting seat 10, further avoiding leakage of carbon dioxide.

[0032] The heating device also includes a reagent tube, which is sleeved on the outside of the tungsten wire 16 and connected to the mounting seat 10, and the outside of the reagent tube is also wrapped with a heat insulation layer 5. Chemical agents can be filled in the reagent tube, and a large amount of heat is generated through the reaction of the chemical agents, which can accelerate the gasification of liquid carbon dioxide. It should be noted that the heating device of the present application does not necessarily have to be provided with a reagent tube, and the present application may also not be provided with a reagent tube, and the chemical agent can be directly loaded into the blasting tube. In addition, if the chemical agent is directly loaded into the reagent tube, a loading port for the agent can also be provided on the filling head 3 of the present application, and the loading port can be sealed by a sealing member 22.

[0033] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limitations on the present invention.

[0034] Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the description are only for explaining the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A smelting furnace wall flue slag cleaning expansion tube, characterized in that: It comprises a bursting tube and an extension tube, wherein the bursting tube is filled with liquid carbon dioxide, a heating device is arranged at one end of the bursting tube, and one end of the extension tube is sleeved on the outer side of the end of the bursting tube provided with the heating device. When slag is removed, the bursting tube is extended into the smelting furnace, and when slag is removed, the outer side of the tube body part of the expansion tube extending into the smelting furnace is wrapped with a heat insulation layer.

2. The slag cleaning expansion tube for the flue of a smelting furnace wall according to claim 1 is characterized in that: The blasting tube comprises a blasting tube body, both ends of which are open, one end of which is connected to a filling head, and the other end of which is connected to a fixing head, and the heating device is connected to the fixing head.

3. The slag cleaning expansion tube for the flue of a smelting furnace wall according to claim 2 is characterized in that: The filling head and the fixing head are both welded to the blasting tube body.

4. The slag cleaning expansion tube for the flue of a smelting furnace wall according to claim 3 is characterized in that: The welding adopts argon arc welding or double arc welding, the number of welding circles is more than 2 circles, the welding groove angle is 40-80 degrees, and the pipe wall of the blasting pipe body is welded through.

5. The slag cleaning expansion tube for the flue of a smelting furnace wall according to claim 2, characterized in that: The filling head is provided with a filling channel and a sealing valve, and the sealing valve is a pin-type sealing valve or a screw-type sealing valve.

6. The slag cleaning expansion tube for the flue of a smelting furnace wall according to claim 5, characterized in that: When it is a thimble-type air sealing valve, one end of the inflation channel is connected to the blasting tube body, and the other end is connected to the thimble-type air sealing valve. The thimble-type air sealing valve includes a valve body and a valve core. An air flow channel is provided in the valve body, and the valve core is inserted into the outlet end of the air flow channel.

7. The slag cleaning expansion tube for the flue of a smelting furnace wall according to claim 5, characterized in that: When it is a screw-type air sealing valve, the inflation channel includes an installation channel and an air inlet channel. The installation channel passes through the inflation head and is connected with the blasting tube body. The air inlet channel is connected with the installation channel through the air inlet. The screw-type air sealing valve includes a screw body. A sealing ring is mounted on the screw body. The screw body is used in conjunction with the installation channel, and the sealing ring is used in conjunction with the air inlet.

8. The slag cleaning expansion tube for the flue of a smelting furnace wall according to claim 2, characterized in that: A combined gasket is arranged between the fixing head and the heating device.

9. The slag cleaning expansion tube for the flue of a smelting furnace wall according to claim 1, characterized in that: The heating device includes a mounting seat, on which are provided two conductive studs penetrating the mounting seat, the ends of the two conductive studs on one side of the mounting seat are connected by tungsten wires, the ends of the two conductive studs on the other side of the mounting seat are respectively connected to conductive wires by bolts, a rubber gasket is provided between the end of the conductive stud connected to the tungsten wire and the mounting seat, and an insulating sleeve is also provided on the outside of the conductive stud located in the mounting seat.

10. The slag cleaning expansion tube for the flue of a smelting furnace wall according to claim 9, characterized in that: The heating device also includes a medicine tube, which is sleeved on the outside of the tungsten wire and connected to the mounting seat. The outside of the medicine tube is also wrapped with a heat insulation layer.

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