Combined blowing furnace feeding mechanism and combined blowing furnace

Abstract

According to the feeding mechanism, a connecting plate is arranged above the combined blowing furnace through a support, the support enables the connecting plate to be close to or away from the combined blowing furnace, a first rotating sleeve is rotationally connected to the connecting plate, the outer periphery of a second rotating sleeve is rotationally connected with the inner periphery of the first rotating sleeve, and the second rotating sleeve is rotationally connected with the inner periphery of the second rotating sleeve. One end of the inserting pipe is connected with the inner circumference of the second rotating sleeve, the other end of the inserting pipe is inserted into molten steel, ingredients can be added into the molten steel through the inserting pipe, one end of the spiral blade is connected with the first rotating sleeve, the other end of the spiral blade is arranged on the inserting pipe in a sleeving mode, and the spiral blade can rotate relative to the inserting pipe. According to the feeding mechanism of the combined blowing furnace, the inserting pipe or the spiral blade rotates independently through the first rotating sleeve and the second rotating sleeve, materials are directly added below the liquid level of molten steel through the inserting pipe, material dissipation, molten steel splashing and environment pollution are avoided, meanwhile, the spiral blade rotates and stirs, material accumulation and blockage are avoided, and material diffusion is accelerated.

Description

Technical Field

[0001] The utility model belongs to the technical field of charging devices for combined blowing furnaces, and more specifically relates to a charging mechanism for a combined blowing furnace and a combined blowing furnace. Background Art

[0002] A converter is a type of steelmaking equipment. Its cylindrical body is mounted on a horizontal truss and can rotate (commonly known as a converter). Its primary raw material comes from molten iron from a blast furnace. The converter body consists of a shell and a lining. The shell is welded from steel plates, while the lining consists of a working layer, a filling layer, and a permanent layer. From top to bottom, the converter is divided into three sections: the cap, the body, and the bottom.

[0003] The converter is the first step in steelmaking, transforming iron into steel. Depending on where the gas (primarily oxygen) is blown into the converter, converters are categorized as top-blown, bottom-blown, and combined. Combined blowing is the method used by most steel mills. For example, after the oxygen is blown from the top, argon is blown from the bottom. This method can reduce the carbon content of the molten steel to 0.01%, which is crucial for steelmaking.

[0004] The converter steelmaking process requires the addition of different ingredients, such as limestone, depending on the type of steel. Due to its nature, limestone breaks down during addition, producing debris and fly ash. These debris and fly ash can escape during the addition process, leading to inaccurate ingredient additions and environmental pollution. Utility Model Content

[0005] The purpose of the utility model is to provide a feeding mechanism for a double-blowing furnace in response to the deficiencies in the prior art, so as to solve the problem that limestone will break and produce debris and powder fly ash due to its nature during the existing adding process, and these debris and powder fly ash will escape during the adding process, resulting in inaccurate dosage of ingredients and pollution of the environment.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a charging mechanism for a combined blowing furnace, comprising:

[0007] A connecting plate, the connecting plate being arranged above the combined blowing furnace via a bracket, the bracket being capable of moving the connecting plate closer to or farther away from the combined blowing furnace;

[0008] a first rotating sleeve, the first rotating sleeve being rotatably connected to the connecting plate;

[0009] a second rotating sleeve, the outer periphery of the second rotating sleeve being rotatably connected to the inner periphery of the first rotating sleeve;

[0010] an intubation tube, one end of which is connected to the inner periphery of the second rotating sleeve, and the other end of which is inserted into the molten steel, so that ingredients can be added to the molten steel through the intubation tube;

[0011] a spiral blade, one end of which is connected to the first rotating sleeve, and the other end of which is sleeved on the cannula, so that the spiral blade can rotate relative to the cannula;

[0012] When adding ingredients, the lower end of the insert tube is not exposed to the spiral blade.

[0013] Optionally, the side wall of one end of the cannula is provided with an arc-shaped driving plate, the inner circumference of the driving plate is provided with a semicircular groove, the connecting plate is provided with a lever mechanism and a vertically arranged telescopic rod, one end of the lever mechanism is connected to the telescopic rod, and the other end of the lever mechanism is provided with a driving ball that cooperates with the groove.

[0014] Optionally, a coaxial driven wheel is provided on the first rotating sleeve, a driving motor is provided on the connecting plate, a driving wheel matching the driven wheel is provided at the output end of the driving motor, and the driving motor can rotate forward and reverse.

[0015] Optionally, the bracket includes:

[0016] A frame, wherein the frame is in a conical cylindrical shape, one end of the frame is connected to the connecting plate, and the other end of the frame is connected to the furnace port of the combined blowing furnace;

[0017] A lifting trolley is arranged on a lifting track and is connected to the frame through a winch.

[0018] Optionally, the bracket includes:

[0019] Track and gantry, the upper end of the gantry is provided with an extension platform, the gantry reciprocates on the track through a lifting trolley, and the connecting plate is provided on the extension platform.

[0020] Optionally, an air blowing tube is provided on the inner wall of the cannula.

[0021] Optionally, the cannula is a telescopic tube.

[0022] Optionally, the cannula includes an inner tube and an outer tube coaxially arranged, and the air blowing tube is spirally wound around the inner tube.

[0023] Optionally, there are multiple air blowing pipes distributed around the circumference.

[0024] The utility model also provides a combined blowing furnace, comprising the combined blowing furnace feeding mechanism mentioned above.

[0025] The utility model provides a charging mechanism for a combined blowing furnace, which has the following beneficial effects:

[0026] The feeding mechanism of the combined blowing furnace makes the insert pipe or the spiral blade rotate independently through the first rotating sleeve and the second rotating sleeve, and directly adds materials below the liquid surface of the molten steel through the insert pipe to avoid material escape, molten steel splashing and environmental pollution. At the same time, the spiral blade rotates and stirs to avoid material accumulation and blockage, and accelerates material diffusion.

[0027] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0029] Figure 1 The figure shows a structural diagram of a door frame of a charging mechanism of a combined blowing furnace according to an embodiment of the present invention.

[0030] Figure 2 A structural schematic diagram of a frame of a charging mechanism for a combined blowing furnace according to an embodiment of the present utility model is shown.

[0031] Description of reference numerals:

[0032] 1. Connecting plate; 2. First rotating sleeve; 3. Second rotating sleeve; 4. Spiral blade; 5. Insert tube; 6. Driving plate; 7. Lever mechanism; 8. Telescopic rod; 9. Driven wheel; 10. Driving motor; 11. Frame; 12. Lifting trolley; 13. Gantry; 14. Lifting trolley. DETAILED DESCRIPTION

[0033] The following describes preferred embodiments of the present invention in greater detail. Although preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0034] like Figure 1-2 As shown, a charging mechanism for a combined blowing furnace includes:

[0035] The connecting plate 1 is arranged above the combined blowing furnace through a bracket, and the bracket can make the connecting plate 1 close to or away from the combined blowing furnace;

[0036] A first rotating sleeve 2, the first rotating sleeve 2 is rotatably connected to the connecting plate 1;

[0037] A second rotating sleeve 3, the outer periphery of the second rotating sleeve 3 is rotatably connected to the inner periphery of the first rotating sleeve 2;

[0038] An insert tube 5, one end of which is connected to the inner periphery of the second rotating sleeve 3, and the other end of which is inserted into the molten steel, so that ingredients can be added to the molten steel through the insert tube 5;

[0039] A spiral blade 4, one end of which is connected to the first rotating sleeve 2, and the other end of which is sleeved on the cannula 5, so that the spiral blade 4 can rotate relative to the cannula 5;

[0040] When adding ingredients, the lower end of the insertion tube 5 is not exposed to the spiral blade 4.

[0041] Specifically, the first rotating sleeve 2 and the second rotating sleeve 3 are used to make the cannula 5 or the spiral blade 4 rotate independently, and materials are added directly below the molten steel surface through the cannula 5 to avoid material escape and molten steel splashing. At the same time, the spiral blade 4 rotates and stirs to avoid material accumulation and blockage, and accelerates material diffusion.

[0042] Furthermore, the spiral blades 4 can simultaneously stir and form a vortex to draw the material, helping the material escape from the cannula 5. The cannula 5 can freely choose whether to rotate, the direction of rotation, and the speed of rotation when the spiral blades 4 rotate. For example, the cannula 5 can be directly connected to the discharge port of the feeding pipe and fixed through the discharge port to prevent it from rotating.

[0043] In this embodiment, an arc-shaped driving plate 6 is provided on the side wall of one end of the cannula 5, and a semicircular groove is provided on the inner periphery of the driving plate 6. A lever mechanism 7 and a vertically arranged telescopic rod 8 are provided on the connecting plate 1. One end of the lever mechanism 7 is connected to the telescopic rod 8, and the other end of the lever mechanism 7 is provided with a driving ball that matches the groove.

[0044] Specifically, the telescopic rod 8 drives the cannula 5 to be inserted into or removed from the molten steel through the lever mechanism 7, which facilitates adjustment of the insertion depth of the cannula 5. Moreover, the lever mechanism 7 can insert and remove the cannula 5 at a more uniform and stable speed than the lifting trolley 12 and the lifting trolley 14, thereby preventing the cannula 5 from splashing the molten steel.

[0045] Furthermore, when the lever mechanism 7 is used, the cannula 5 cannot rotate. The outer periphery of the cannula 5 can be provided with an axial keyway, and the inner periphery of the second rotating sleeve 3 is provided with a slider or a sliding groove that cooperates with the keyway for guidance.

[0046] In this embodiment, a coaxial driven wheel 9 is provided on the first rotating sleeve 2, a driving motor 10 is provided on the connecting plate 1, and a driving wheel matching the driven wheel 9 is provided at the output end of the driving motor 10. The driving motor 10 can rotate forward and reverse.

[0047] Specifically, the driving motor 10 cooperates with the driving wheel and the driven wheel 9 to install the first rotating sleeve 2, thereby driving the spiral blade 4 to rotate.

[0048] In this embodiment, the bracket includes:

[0049] Frame 11, frame 11 is in a conical shape, one end of frame 11 is connected to connecting plate 1, and the other end of frame 11 is connected to the furnace mouth of the combined blowing furnace;

[0050] The lifting trolley 12 is arranged on the lifting track, and the lifting trolley 12 is connected to the frame 11 through a winch.

[0051] Specifically, the double-blowing furnace is automatically positioned and aligned by the conical frame 11 so that the insert pipe 5 is located on the axis of the double-blowing furnace. The lifting trolley 12 moves the frame 11 to facilitate connection or separation with the double-blowing furnace to avoid affecting the pouring of molten steel in the double-blowing furnace.

[0052] In this embodiment, the bracket includes:

[0053] Track and gantry 13, the upper end of the gantry 13 is provided with an extension platform, the gantry 13 reciprocates on the track through the lifting trolley 14, and the connecting plate 1 is provided on the extension platform.

[0054] Specifically, the lifting trolley 14 cooperates with the track to move the gantry 13. At the same time, the lifting trolley 14 facilitates the insertion of the tube 5 under the molten steel surface. The extended platform prevents the gantry 13 from being located above the combined blowing furnace as a whole, thereby avoiding and reducing high-temperature baking.

[0055] In this embodiment, an air blowing tube is provided on the inner wall of the cannula 5 .

[0056] Specifically, auxiliary blowing is facilitated by an air blowing tube.

[0057] In this embodiment, the cannula 5 is a telescopic tube.

[0058] Specifically, the insertion depth of the molten steel can be automatically adjusted through the telescopic tube, and can also be coordinated with enhanced top blowing or bottom blowing.

[0059] Furthermore, the depth of insertion into the molten steel can also be adjusted according to the density ratio of the added material.

[0060] In this embodiment, the cannula 5 includes an inner tube and an outer tube which are coaxially sleeved, and the air blowing tube is spirally wound around the inner tube.

[0061] Specifically, the spiral winding design makes the final outlet gas close to the temperature of the molten steel, avoiding a large temperature difference between the gas and the molten steel, and at the same time, the intubation tube 5 can be cooled by the air blowing pipe.

[0062] In this embodiment, a plurality of air blowing pipes are distributed around the circumference.

[0063] Specifically, a plurality of air blowing pipes are distributed circumferentially, so that air blowing and heat dissipation are uniform.

[0064] The utility model also provides a combined blowing furnace, comprising the combined blowing furnace feeding mechanism mentioned above.

[0065] Example 1

[0066] When using a charging mechanism for a combined blowing furnace in this embodiment, take the use of a door frame 13 as an example:

[0067] like Figure 1 As shown, the lifting trolley 14 moves along the track to move the feeding mechanism to the top of the double-blowing furnace; the cannula 5 is inserted into the molten steel through the lifting trolley 14 or the telescopic rod 8 and the lever mechanism 7; then the material is added through the cannula 5 to the level below the molten steel surface, and the spiral blade 4 rotates and stirs during the adding process to avoid material accumulation; after adding the material, the cannula 5 is first pulled out, and then the feeding mechanism is removed.

[0068] Example 2

[0069] When using a charging mechanism for a combined blowing furnace in this embodiment, the use of the frame 11 is taken as an example:

[0070] like Figure 2 As shown, the feeding mechanism is moved to the top of the double-blowing furnace by the lifting trolley 12; the feeding mechanism is slowly lowered to insert the cannula 5 into the molten steel; then the material is added through the cannula 5 to the level below the molten steel surface, and the spiral blade 4 rotates and stirs during the adding process to avoid material accumulation; after adding the material, the feeding mechanism can be removed.

[0071] While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A charging mechanism for a combined blowing furnace, characterized in that: include: A connecting plate, the connecting plate being arranged above the combined blowing furnace via a bracket, the bracket being capable of moving the connecting plate closer to or farther away from the combined blowing furnace; a first rotating sleeve, the first rotating sleeve being rotatably connected to the connecting plate; a second rotating sleeve, the outer periphery of the second rotating sleeve being rotatably connected to the inner periphery of the first rotating sleeve; an intubation tube, one end of which is connected to the inner periphery of the second rotating sleeve, and the other end of which is inserted into the molten steel, so that ingredients can be added to the molten steel through the intubation tube; a spiral blade, one end of which is connected to the first rotating sleeve, and the other end of which is sleeved on the cannula, so that the spiral blade can rotate relative to the cannula; When adding ingredients, the lower end of the insert tube is not exposed to the spiral blade.

2. The charging mechanism for the combined blowing furnace according to claim 1, characterized in that: The side wall of one end of the cannula is provided with an arc-shaped driving plate, the inner circumference of the driving plate is provided with a semicircular groove, the connecting plate is provided with a lever mechanism and a vertically arranged telescopic rod, one end of the lever mechanism is connected to the telescopic rod, and the other end of the lever mechanism is provided with a driving ball that matches the groove.

3. The charging mechanism for the combined blowing furnace according to claim 2, characterized in that: A coaxial driven wheel is provided on the first rotating sleeve, a driving motor is provided on the connecting plate, a driving wheel matched with the driven wheel is provided at the output end of the driving motor, and the driving motor can rotate forward and reverse.

4. The charging mechanism for the combined blowing furnace according to claim 1, characterized in that: The bracket comprises: A frame, wherein the frame is in a conical cylindrical shape, one end of the frame is connected to the connecting plate, and the other end of the frame is connected to the furnace port of the combined blowing furnace; A lifting trolley is arranged on a lifting track and is connected to the frame through a winch.

5. The charging mechanism for the combined blowing furnace according to claim 1, characterized in that: The bracket comprises: Track and gantry, the upper end of the gantry is provided with an extension platform, the gantry reciprocates on the track through a lifting trolley, and the connecting plate is provided on the extension platform.

6. The charging mechanism for the combined blowing furnace according to claim 1, characterized in that: The inner wall of the cannula is provided with an air blowing tube.

7. The charging mechanism for a combined blowing furnace according to claim 1, characterized in that: The cannula is a telescopic tube.

8. The charging mechanism for the combined blowing furnace according to claim 6, characterized in that: The cannula comprises an inner tube and an outer tube which are coaxially sleeved, and the air blowing tube is spirally wound on the inner tube.

9. The charging mechanism for a combined blowing furnace according to claim 6, characterized in that: There are multiple air blowing pipes distributed around the circumference.

10. A combined blowing furnace, characterized in that: It comprises the charging mechanism for the combined blowing furnace according to any one of claims 1-9.

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