A control device and method for taphole injection of a blast furnace

Abstract

The application discloses a control device and method for blast furnace iron notch, and relates to the technical field of metallurgical ironmaking. The control device comprises a connecting conduit, one end of which is used for detachable sealing connection with a blast conduit of the blast furnace iron notch; a silencer, one end of which is in communication with the other end of the connecting conduit; and a flow guide pipe, one end of which is in communication with the side wall of the other end of the silencer, and the other end of which is used for being arranged on the upper end of a tapping main channel of the blast furnace iron notch. The coal gas in the blast conduit is output to the silencer through the connecting conduit, is subjected to silencing treatment in the silencer, and is then output to the flow guide pipe. The flow guide pipe outputs the coal gas to the tapping main channel for combustion, so that the temperature in the tapping main channel is ensured. The control device is used in cooperation with the blast furnace and the opening machine. The control device is connected with the blast conduit of the blast furnace iron notch through the action of the opening machine, so that the coal gas, dust and noise blown out of the blast conduit of the blast furnace iron notch are guided and controlled.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metallurgical ironmaking, and particularly relates to a control device and method for blast furnace iron notch blowing. BACKGROUND

[0002] When the blast furnace is started, in order to better heat the furnace bottom and the iron notch area, a built-in blowing guide pipe in the iron notch leads out high-temperature coal gas, so that the heat in the furnace forms a convection transfer. Whether the two parts are heated sufficiently is a key factor for the blast furnace to start and tap iron.

[0003] At present, when the blast furnace is started and the iron notch is blown, the coal gas is blown out from the iron notch through the blowing guide pipe, and is ignited by the coal gas fire placed nearby. The flame burns along the angle of the iron notch. Due to the high flow rate of the coal gas and the insufficient mixing with oxygen, incomplete combustion and flameout occur, accompanied by deflagration, which easily causes coal gas leakage and forms a safety hazard. The high-temperature coal gas entrained with the furnace charge dust is ejected at high speed, and part of it escapes from the absorption range of the dust removal fan, which seriously restricts the environmental protection production. The noise is high during blowing, which affects the health of the operators. SUMMARY

[0004] The purpose of the present application is to provide a control device and method for blast furnace iron notch blowing, so as to guide and control the coal gas, dust and noise blown out by the blowing guide pipe of the blast furnace iron notch.

[0005] To solve the above technical problems, the present application adopts the following technical solutions:

[0006] One aspect of the embodiment of the present application provides a control device for blast furnace iron notch blowing. The control device comprises: a connecting guide pipe, one end of the connecting guide pipe being used for detachable and sealed connection with a blowing guide pipe of a blast furnace iron notch; a silencing device, one end of the silencing device being in communication with the other end of the connecting guide pipe; and a flow guide pipe, one end of the flow guide pipe being in communication with the side wall of the other end of the silencing device, and the other end of the flow guide pipe being used for being arranged on the upper end of a main iron tapping groove of the blast furnace iron notch. The coal gas in the blowing guide pipe is output to the silencing device through the connecting guide pipe, is subjected to silencing treatment in the silencing device, and is then output to the flow guide pipe. The flow guide pipe outputs the coal gas to the main iron tapping groove for combustion, so as to ensure the temperature in the main iron tapping groove.

[0007] In some embodiments, the flow guide pipe comprises an extension end and a gas outlet end. One end of the extension end is in communication with the side wall of the other end of the silencing device, and the other end of the extension end is in communication with one end of the gas outlet end. The other end of the gas outlet end outputs the coal gas for combustion.

[0008] In some embodiments, the control device further comprises a connecting rod. One end of the connecting rod is connected with the other end of the silencing device, and the other end of the connecting rod is used for fixed placement.

[0009] In some embodiments, the control device further comprises a fixed rib plate, one end of the connecting rod is connected with the other end of the muffling device through the fixed rib plate, and the fixed rib plate is used for strengthening the connection stability of the connecting rod and the muffling device.

[0010] In some embodiments, the muffling device comprises a shell, sound insulation cotton and an inner hole pipe, the sound insulation cotton wraps the inner hole pipe, and the sound insulation cotton and the inner hole pipe are arranged in the shell, a side wall of the inner hole pipe is provided with a plurality of air holes, the other end of the connecting pipe communicates with one end of the inner hole pipe through one end of the shell, and one end of the connecting rod is connected with the other end of the inner hole pipe through the other end of the shell.

[0011] In some embodiments, a storage cavity is arranged between the other end of the inner hole pipe and the other end of the shell, when part of the furnace charge in the blast furnace is brought into the muffling device by the coal gas and cannot be discharged from the flow guide pipe, the furnace charge is stored in the storage cavity.

[0012] In some embodiments, the storage cavity is provided with a discharge hole, when the flow guide pipe is blocked by the furnace charge, the furnace charge is taken out by opening the discharge hole; and when the flow guide pipe is not blocked by the furnace charge, the discharge hole is closed.

[0013] An aspect of the embodiment of the present application provides a control method of a blast furnace injection iron notch, which is applied to the control device and comprises the following steps: fixing the connecting rod and the tail of the opening machine, clamping the connecting pipe by the opening machine clamp; opening the blast furnace dust removal fan; setting the angle of the connecting pipe to be consistent with the angle of the injection pipe of the blast furnace iron notch; sealingly connecting one end of the connecting pipe with the injection pipe of the blast furnace iron notch; discharging the coal gas in the blast furnace from the flow guide pipe of the control device, and igniting the coal gas discharged from the flow guide pipe.

[0014] In some embodiments, after the coal gas in the blast furnace is discharged from the flow guide pipe of the control device and the coal gas discharged from the flow guide pipe is ignited, the method further comprises the following steps: when the control device is blocked by the furnace charge, the connecting pipe is pulled out by the opening machine and retreated to the maintenance area; the coal gas discharged from the injection pipe of the blast furnace iron notch is ignited; and the furnace charge is taken out by opening the discharge hole.

[0015] In some embodiments, after the coal gas in the blast furnace is discharged from the flow guide pipe of the control device and the coal gas discharged from the flow guide pipe is ignited, the method further comprises the following steps: when the injection pipe of the blast furnace iron notch is blocked by the furnace charge, the connecting pipe is pulled out by the opening machine; the connecting pipe is replaced by the opening machine tamping rod, and the injection pipe of the blast furnace iron notch is ventilated by controlling the opening machine tamping rod.

[0016] According to the control device and method for the blast furnace taphole of the embodiment of the present application, at least the following beneficial effects are achieved: the control device of the present application is used in cooperation with the blast furnace and the taphole machine, the control device is connected with the blast duct of the blast furnace taphole through the action of the taphole machine, thereby achieving the guiding control of the blast gas, dust and noise blasted from the blast duct of the blast furnace taphole. The present application can greatly reduce the noise on site when the blast duct of the blast furnace taphole is blasted, and at the same time can make the flame burn uniformly, improve the safety factor, and the guided blast gas can heat and preheat the taphole main channel after combustion, and the dust can be diffused within the capacity range of the dust removal fan after being guided by the control device, thereby improving the environmental protection effect.

[0017] It should be understood that the above general description and the following detailed description are only exemplary and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 It is a structural schematic diagram of the control device according to the embodiment.

[0020] Figure 2 It is a structural schematic diagram of the cooperation of the control device, the taphole machine and the blast duct according to the embodiment.

[0021] The reference signs are explained as follows: 1, connecting duct; 2, silencing device; 3, flow guide pipe; 4, extension end; 5, gas outlet end; 6, connecting rod; 7, fixed rib plate; 8, outer shell; 9, sound insulation cotton; 10, built-in hole pipe; 11, storage cavity; 12, discharging hole; 13, blast duct; 14, taphole main channel; 15, taphole machine; 16, clamp. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0023] In the description of the present application, it needs to be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0024] The terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0025] In the description of the present application, it needs to be noted that, unless otherwise explicitly specified and limited, the terms "communication", "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations, however, can be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these example implementations are provided so that this disclosure will be thorough and complete, and will fully convey the inventive concept of the example implementations to those skilled in the art. The accompanying drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this disclosure. The same reference numerals in the drawings indicate the same or similar elements and as such repeated description of the same will be omitted.

[0027] The control device of the blast furnace injection iron notch of the embodiment of the present application will be simply described below:

[0028] According to some embodiments, as Figures 1 to 2 shown, the present application provides a control device of a blast furnace injection iron notch, the control device comprises:

[0029] A connecting pipe 1, one end of the connecting pipe 1 is used for detachable sealing connection with the injection pipe 13 of the blast furnace iron notch;

[0030] A silencing device 2, one end of the silencing device 2 communicates with the other end of the connecting pipe 1;

[0031] A flow guide pipe 3, one end of which is in communication with the side wall of the other end of the sound attenuation device 2, the other end of which is used to be arranged at the upper end of the taphole main channel 14 of the blast furnace, the gas in the injection pipe 13 is output to the sound attenuation device 2 through the connecting pipe 1, and after the sound attenuation device 2 is used for sound attenuation treatment, the gas is output to the flow guide pipe 3, and the flow guide pipe 3 outputs the gas to the taphole main channel 14 for combustion, thereby ensuring the temperature in the taphole main channel 14.

[0032] Based on the above embodiment, as shown in Figures 1 to 2 The control device of the present application is used in cooperation with the blast furnace and the taphole machine 15, the control device is connected with the injection pipe 13 of the blast furnace taphole through the action of the taphole machine 15, thereby achieving the guiding control of the gas, dust and noise blown out of the injection pipe 13 of the blast furnace taphole. The present application can greatly reduce the noise on site when the injection pipe 13 of the blast furnace taphole is blown, and at the same time can make the flame burn uniformly, improve the safety factor, and after the gas is burned, the taphole main channel 14 can be preheated, and the dust is diffused within the capacity of the dust removal fan after being guided by the control device, thereby improving the environmental protection effect.

[0033] The following will be described in detail in combination with the drawings of the present application. Figures 1 to 2 The control device of the blast furnace taphole of the present application will be further described in detail.

[0034] According to some embodiments, as shown in Figure 1 The flow guide pipe 3 includes an extension end 4 and a gas outlet end 5, one end of the extension end 4 is in communication with the side wall of the other end of the sound attenuation device 2, the other end of the extension end 4 is in communication with one end of the gas outlet end 5, and the other end of the gas outlet end 5 outputs the gas for combustion.

[0035] Based on the above embodiment, as shown in Figures 1 to 2 The extension end 4 is connected with the gas outlet end 5 at an obtuse angle, the gas outlet end 5 is arranged at the upper end of the taphole main channel 14 of the blast furnace taphole, the gas in the injection pipe 13 is output to the sound attenuation device 2 through the connecting pipe 1, and after the sound attenuation device 2 is used for sound attenuation treatment, the gas is output to the extension end 4 of the flow guide pipe 3, the extension end 4 of the flow guide pipe 3 outputs the gas to the gas outlet end 5 of the flow guide pipe 3, and the gas outlet end 5 of the flow guide pipe 3 outputs the gas to the taphole main channel 14 for combustion, thereby ensuring the temperature in the taphole main channel 14.

[0036] According to some embodiments, as shown in Figures 1 to 2 The control device further includes a connecting rod 6, one end of the connecting rod 6 is connected with the other end of the sound attenuation device 2, and the other end of the connecting rod 6 is used for fixed placement.

[0037] Based on the above embodiment, as shown in Figure 2 The other end of the connecting rod 6 is fixedly connected with the taphole machine 15 through the taphole machine drill tail.

[0038] According to some embodiments, as shown in Figures 1 to 2 The control device further comprises a fixed rib plate 7, one end of the connecting rod 6 is connected with the other end of the muffling device 2 through the fixed rib plate 7, and the fixed rib plate 7 is used to strengthen the connection stability of the connecting rod 6 and the muffling device 2.

[0039] According to some embodiments, as shown in Figure 1 The muffling device 2 comprises a shell 8, soundproof cotton 9 and an inner hole pipe 10, the soundproof cotton 9 wraps the inner hole pipe 10, and the soundproof cotton 9 and the inner hole pipe 10 are arranged in the shell 8, the side wall of the inner hole pipe 10 is provided with a plurality of air holes, the other end of the connecting pipe 1 penetrates one end of the shell 8 and communicates with one end of the inner hole pipe 10, one end of the connecting rod 6 penetrates the other end of the shell 8 and is connected with the other end of the inner hole pipe 10, and one end of the connecting rod 6 is fixedly connected with the other end of the shell 8 through the fixed rib plate 7.

[0040] The inner hole pipe 10 is used to receive the gas output by the connecting pipe 1 and output the gas to the shell 8 through the plurality of air holes. The other end of the shell 8 communicates with the extension end 4, and the extension end 4 transmits the gas in the shell 8 to the gas outlet end 5, and the gas outlet end 5 outputs the gas to the main iron discharge groove 14 for combustion.

[0041] The soundproof cotton 9 is used to eliminate noise.

[0042] According to some embodiments, as shown in Figure 1 The other end of the inner hole pipe 10 and the other end of the shell 8 are provided with a storage cavity 11, when part of the furnace charge in the blast furnace is brought into the muffling device 2 by the gas and cannot be discharged from the flow guide pipe 3, the furnace charge is stored in the storage cavity 11.

[0043] Further, as shown in Figure 1 The side wall of the storage cavity 11 is provided with a discharge hole 12, when the flow guide pipe 3 is blocked by the furnace charge, the discharge hole 12 is opened to take out the furnace charge, and when the flow guide pipe 3 is not blocked by the furnace charge, the discharge hole 12 is closed.

[0044] Based on the above embodiments, when the flow guide pipe 3 is not blocked by the furnace charge, the control device is used normally, and when the flow guide pipe 3 is blocked by the furnace charge, the discharge hole 12 is opened to take out the furnace charge. The problem that the control device is blocked by the furnace charge is solved by arranging the discharge hole 12.

[0045] The control method of the blast furnace iron injection port of the embodiment of the present application is briefly described as follows:

[0046] According to some embodiments, the application provides a control method of a blast furnace taphole, applied to the control device as described above, the control method comprising:

[0047] Step 101, the connecting rod 6 is fixedly connected with the taphole drill bit, and the taphole clamp 16 clamps the connecting conduit 1;

[0048] Step 102, the blast furnace dust removal fan is turned on;

[0049] Step 103, the angle of the connecting conduit 1 is set to be consistent with the angle of the taphole drill bit 13 of the blast furnace taphole;

[0050] Step 104, one end of the connecting conduit 1 is sealingly connected with the taphole drill bit 13 of the blast furnace taphole;

[0051] Step 105, the gas in the blast furnace is discharged from the flow guide pipe 3 of the control device, and the gas discharged from the flow guide pipe 3 is ignited.

[0052] According to some embodiments, after the gas in the blast furnace is discharged from the flow guide pipe 3 of the control device and the gas discharged from the flow guide pipe 3 is ignited in step 105, the method further comprises:

[0053] When the charge blocks the control device, the taphole clamp 16 is operated to pull out the connecting conduit 1 and retreat to the maintenance area;

[0054] The gas discharged from the taphole drill bit 13 of the blast furnace taphole is ignited;

[0055] The discharge hole 12 is opened to take out the charge.

[0056] According to some embodiments, after the gas in the blast furnace is discharged from the flow guide pipe 3 of the control device and the gas discharged from the flow guide pipe 3 is ignited in step 105, the method further comprises:

[0057] When the charge blocks the taphole drill bit 13 of the blast furnace taphole, the taphole clamp 16 is operated to pull out the connecting conduit 1;

[0058] The connecting conduit 1 is replaced with a taphole drill bit of the taphole clamp, and the taphole drill bit 13 of the blast furnace taphole is ventilated by controlling the taphole clamp.

[0059] Based on the above embodiments, before the taphole drill bit 13 of the blast furnace taphole is blown, it is confirmed that the taphole drill bit 13 of the blast furnace taphole is firmly installed, the angle is correct, and there is no blockage. It is confirmed that the angle of the connecting conduit 1 is consistent with the angle of the taphole drill bit 13 of the blast furnace taphole. The control device is installed on the taphole clamp 15, the connecting rod 6 is fixedly connected with the taphole drill bit, and the hook is well supported. The taphole clamp 16 is started to clamp the connecting conduit 1. The blast furnace dust removal fan is turned on.

[0060] When the injection of the injection pipe 13 of the blast furnace tap hole begins, the opening machine 15 of the carrying control device is rotated from the rest position to the working position above the main iron discharge channel 14, and the opening machine 15 trolley is pushed to connect the one end of the connecting pipe 1 with the injection pipe 13 of the blast furnace tap hole. The gas in the blast furnace is discharged from the control device flow guide pipe 3, and the operator ignites it to ensure the safety of the site, and the flame generated in the main iron discharge channel 14 plays a roasting role.

[0061] During the injection of the flow guide pipe 3 of the control device, if the control device is blocked by the blocky burden, the opening machine 15 can be operated to retreat, the gas output from the injection pipe 13 of the blast furnace tap hole is ignited (at this time, the ignition of the gas flame is for safety consideration, and if it is not ignited, the diffused gas will cause safety hazards to the surrounding operators), the discharge hole 12 is opened, and the burden blocking the control device is taken out. If the injection pipe 13 of the blast furnace tap hole is blocked by the blocky burden, the control device can be retreated, and the opening machine is replaced with a tamping rod to ventilate the injection pipe 13 of the blast furnace tap hole. The control device of the present application is convenient to use and does not affect other work of the tap hole during the blowing of the blast furnace. After the ventilation treatment, the above operation can be repeated to continue to guide and control the gas output from the injection pipe 13 of the blast furnace tap hole.

[0062] In the description of the above-described embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0063] Although the present disclosure has been described with reference to several exemplary embodiments, it is understood that the terms used are illustrative and not restrictive terms. Since the present disclosure can be embodied in various forms without departing from the spirit or essential characteristics thereof, it should be understood that the above-described embodiments are not limited to any of the aforementioned details, but are to be interpreted broadly within the spirit and scope of the appended claims, and thus all changes and modifications that fall within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A control device for blast furnace injection taphole, characterized in that, The control device comprises: a connecting conduit, one end of which is used for detachable sealed connection with the injection conduit of the blast furnace taphole; a sound attenuation device, one end of which is in communication with the other end of the connecting conduit; a flow guide pipe, one end of which is in communication with the side wall of the other end of the sound attenuation device, and the other end of which is used for being arranged on the upper end of the main discharge channel of the blast furnace taphole, wherein the coal gas in the injection conduit is output to the sound attenuation device through the connecting conduit, is subjected to sound attenuation treatment in the sound attenuation device, and is then output to the flow guide pipe, and the coal gas output from the flow guide pipe is combusted in the main discharge channel of the blast furnace taphole, so that the temperature in the main discharge channel of the blast furnace taphole is ensured.

2. The control device according to claim 1, characterized by The flow guide pipe comprises an extension end and a gas outlet end, one end of the extension end is in communication with the side wall of the other end of the sound attenuation device, the other end of the extension end is in communication with one end of the gas outlet end, and the other end of the gas outlet end outputs the coal gas for combustion.

3. The control device according to claim 1 or 2, characterized by The control device further comprises a connecting rod, one end of the connecting rod is connected with the other end of the sound attenuation device, and the other end of the connecting rod is used for fixed placement.

4. The control device according to claim 3, characterized by The control device further comprises a fixing rib plate, one end of the connecting rod is connected with the other end of the sound attenuation device through the fixing rib plate.

5. The control device of claim 4, wherein The sound attenuation device comprises a shell, sound insulation cotton and an inner hole pipe, the sound insulation cotton wraps the inner hole pipe, the sound insulation cotton and the inner hole pipe are arranged in the shell, a plurality of air holes are formed in the side wall of the inner hole pipe, the other end of the connecting conduit penetrates one end of the shell and is in communication with one end of the inner hole pipe, one end of the connecting rod penetrates the other end of the shell and is connected with the other end of the inner hole pipe, and one end of the connecting rod is fixedly connected with the other end of the shell through the fixing rib plate.

6. The control device of claim 5, wherein A storage cavity is arranged between the other end of the inner hole pipe and the other end of the shell, when part of the furnace charge in the blast furnace is brought into the sound attenuation device by the coal gas and cannot be discharged from the flow guide pipe, the furnace charge is stored in the storage cavity.

7. The control device of claim 6, wherein A discharge hole is formed in the side wall of the storage cavity, when the flow guide pipe is blocked by the furnace charge, the discharge hole is opened to take out the furnace charge. When the flow guide pipe is not blocked by the furnace charge, the discharge hole is closed.

8. A control method of a blast furnace taphole, applied to the control device according to claim 7, characterized in that, The control method comprises: the connecting rod is fixedly connected with the tail of the opening machine drill, and the opening machine clamp clamps the connecting conduit; the blast furnace dust removal fan is opened; the angle of the connecting conduit is set to be consistent with the angle of the injection conduit of the blast furnace taphole; one end of the connecting conduit is sealedly connected with the injection conduit of the blast furnace taphole; the coal gas in the blast furnace is discharged from the flow guide pipe of the control device, and the discharged coal gas is ignited.

9. The control method according to claim 8, characterized by, After the coal gas in the blast furnace is discharged from the flow guide pipe of the control device and the discharged coal gas is ignited, the method further comprises: when the control device is blocked by the furnace charge, the opening machine is operated to pull out the connecting conduit and retreat to the maintenance area; the coal gas discharged from the injection conduit of the blast furnace taphole is ignited; the discharge hole is opened to take out the furnace charge.

10. The control method according to claim 8, characterized by, After the coal gas in the blast furnace is discharged from the flow guide pipe of the control device and the discharged coal gas is ignited, the method further comprises: when the injection conduit of the blast furnace taphole is blocked by the furnace charge, the opening machine is operated to pull out the connecting conduit. The connecting conduit is replaced by an opening machine punch drill, and the opening machine punch drill is used to control the ventilation of the blast furnace iron notch.

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