Blanking device for blast furnace ironmaking

Abstract

The utility model provides a blanking device for blast furnace ironmaking. The blanking device comprises a frame body, a mixing mechanism and a feeding barrel, the frame body is arranged above the ironmaking furnace, and a lifting mechanism is arranged on the frame body; the mixing mechanism is arranged on the lifting mechanism and located above the ironmaking furnace. The mixing mechanism is used for continuously conveying coke from top to bottom and intermittently mixing iron ore powder into the coke; the feeding barrel is located below the mixing mechanism and extends into the iron making furnace, the top end of the feeding barrel is connected with the discharging end of the mixing mechanism, a plurality of discharging ports are evenly distributed in the bottom of the feeding barrel, and the feeding barrel is connected with the lifting mechanism and used for intermittently moving from bottom to top under driving of the lifting mechanism and discharging during moving. According to the blanking device for blast furnace ironmaking provided by the utility model, the lifting mechanism drives the feeding barrel to move upwards in the ironmaking furnace, and materials are distributed in the ironmaking furnace in a layered manner through the discharge ports, so that a raw material layer and a coke layer are alternately laid in the ironmaking furnace, and the ironmaking efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of blast furnace ironmaking, and particularly relates to a discharging device for blast furnace ironmaking. BACKGROUND

[0002] The principle of blast furnace ironmaking is to reduce iron oxides in iron ore into metallic iron by using reducing agents such as carbon monoxide and hydrogen; first, raw materials such as iron ore, coke, and limestone are mixed in proportion, and then the raw materials are loaded into the blast furnace hearth, hot air is sent into the blast furnace to make the coke burn and produce high-temperature reducing gas, and the iron ore is reduced into liquid pig iron. When loading the raw materials into the blast furnace hearth, the raw materials in the blast furnace hearth can be intelligently layered, forming a layered filling structure in which the coke layer and the raw material layer are alternately arranged in the blast furnace hearth. When hot air is blown into the blast furnace hearth, the coke layer will burn between the two layers of raw material, which can improve the efficiency of ironmaking.

[0003] In the prior art, when the raw material layer in the blast furnace is almost consumed, the coke layer and the raw material layer are alternately filled into the blast furnace through the filling port at the top of the blast furnace. However, during the process of filling the coke layer into the blast furnace, the coke layer and the raw material layer entering the blast furnace will fall on the local position of the storage plate inside the blast furnace and produce local accumulation on the storage plate around the position, which cannot realize uniform paving of the coke layer and the raw material layer on the storage plate, and also affects the subsequent filling of the raw material layer and other coke layers. SUMMARY

[0004] The utility model embodiment provides a kind of discharging device for blast furnace ironmaking, to realize the uniform paving of raw material layer and coke layer in furnace.

[0005] To achieve the above object, the utility model adopts the technical scheme of: providing a kind of discharging device for blast furnace ironmaking, including frame body, mixing mechanism and feeding cylinder;Frame body is located above the ironmaking furnace, and lifting mechanism is arranged on the frame body;Mixing mechanism is located on the lifting mechanism and is located above the ironmaking furnace;Mixing mechanism is used for continuously conveying coke from top to bottom and intermittently mixing iron ore powder in coke;Feeding cylinder is located below mixing mechanism and extends into ironmaking furnace, and the top end of feeding cylinder is connected with the discharge end of mixing mechanism, and the bottom of feeding cylinder is uniformly distributed with multiple discharge ports, and feeding cylinder is connected with lifting mechanism, for intermittent movement from bottom to top under the driving of lifting mechanism and discharging when moving.

[0006] In a possible implementation manner, the mixing mechanism includes a mixing pipe, a rotary drive member and a rotating shaft;The mixing pipe is vertically arranged on the lifting mechanism, and the mixing pipe has a discharge end below;The rotary drive member is arranged on the lifting mechanism and located above the mixing pipe;The rotating shaft is connected with the output end of the rotary drive member and located in the mixing pipe, and the rotating shaft is provided with helical blades.

[0007] In one possible implementation, the mixing pipe is provided with two conveying pipes, which are arranged vertically and horizontally; one conveying pipe is used to continuously convey coke into the mixing pipe, and the other conveying pipe is used to intermittently convey iron ore powder into the mixing pipe.

[0008] In one possible implementation, the helical blades are located below the feed pipe.

[0009] In one possible implementation, the feeding cylinder includes a cylinder body, a collecting hopper, a collecting chamber, and multiple feeding pipes; the cylinder body is located inside the blast furnace and is connected to the lifting mechanism; the collecting hopper is located inside the cylinder body and fits against the inner wall of the cylinder body; the collecting chamber is located inside the cylinder body and is located below the collecting hopper, and the collecting chamber is connected to the collecting hopper; each feeding pipe is located below the collecting chamber and is connected to the collecting chamber, and the bottom of the feeding pipe forms a discharge port.

[0010] In one possible implementation, the hopper is equipped with a spiral pipe, and the hopper is connected to the collection chamber through the spiral pipe.

[0011] In one possible implementation, the bottom of the collection chamber is conical.

[0012] In one possible implementation, the feed tubes are arranged in a ring array.

[0013] In one possible implementation, the lifting mechanism includes a mounting frame and two telescopic drive components. The mounting frame is located above the frame body, and the mixing mechanism and the feeding cylinder are both mounted on the mounting frame. The two telescopic drive components are both mounted on the frame body and are located on both sides of the blast furnace, respectively. The output end of the telescopic drive components is connected to the mounting frame.

[0014] In one possible implementation, the mounting frame is provided with legs that abut against the top wall of the frame.

[0015] The beneficial effects of the blast furnace ironmaking feeding device provided by this utility model are as follows: Compared with the prior art, this utility model continuously feeds coke into the blast furnace and intermittently feeds iron ore powder through a mixing mechanism. When the iron ore powder is being fed, it can be mixed with coke to form ironmaking raw materials and fed into the blast furnace to form a raw material layer. When the iron ore powder is stopped being fed, coke is fed into the blast furnace separately to form a coke layer. The intermittent feeding of iron ore powder by the mixing mechanism can realize the alternating feeding of the raw material layer and the coke layer. The feeding cylinder extends into the blast furnace and moves upward inside the furnace under the drive of the lifting mechanism. Ironmaking raw materials and coke alternately enter the blast furnace through various discharge ports, and multiple discharge ports can discharge simultaneously, so that ironmaking raw materials and coke are alternately spread evenly in the blast furnace to form raw material layers and coke layers. When hot air is blown into the blast furnace, the coke layer can burn between the two raw material layers, which can improve ironmaking efficiency. When ironmaking raw materials or coke are continuously discharged until the top surface is level with the discharge port, the ironmaking raw materials or coke can abut against the bottom wall of the feeding cylinder and block the discharge port, which can ensure that ironmaking raw materials and coke alternately enter the blast furnace, realize the alternating spread of raw material layers and coke layers, make coke combustion more complete, and achieve full reduction of iron ore powder. Attached Figure Description

[0016] Figure 1 A three-dimensional structural schematic diagram of the charging device for blast furnace ironmaking provided in this embodiment of the utility model;

[0017] Figure 2 This is a front view structural schematic diagram of the blast furnace ironmaking feeding device provided in an embodiment of the present utility model;

[0018] Figure 3 This is a front view schematic diagram of the feeding cylinder used in the embodiment of this utility model;

[0019] Figure 4 A front view schematic diagram of the layered material distribution structure of the blast furnace ironmaking feeding device provided in this embodiment of the utility model;

[0020] Figure 5 A bottom view of the feeding device for blast furnace ironmaking provided in an embodiment of this utility model;

[0021] In the diagram: 10. Frame; 20. Lifting mechanism; 21. Mounting frame; 211. Support leg; 22. Telescopic drive component; 30. Mixing mechanism; 31. Mixing pipe; 32. Rotary drive component; 33. Rotating shaft; 34. Spiral blade; 35. Conveying pipe; 40. Feeding cylinder; 41. Cylinder; 42. Collecting hopper; 43. Collecting chamber; 44. Feeding pipe; 45. Spiral pipe; 50. Ironmaking furnace; 60. Raw material layer; 70. Coke layer. Detailed Implementation

[0022] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] It should be noted that when an element is referred to as being "set on" another element, it can be directly on or indirectly on the other element. It should be understood that the terms "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0024] Please refer to the following: Figures 1 to 4 The present invention provides a blast furnace ironmaking feeding device. The blast furnace ironmaking feeding device includes a frame 10, a mixing mechanism 30, and a feeding cylinder 40. The frame 10 is located above the blast furnace 50, and a lifting mechanism 20 is mounted on the frame 10. The mixing mechanism 30 is mounted on the lifting mechanism 20 and located above the blast furnace 50. The mixing mechanism 30 continuously conveys coke from top to bottom and intermittently mixes iron ore powder into the coke. The feeding cylinder 40 is located below the mixing mechanism 30 and extends into the blast furnace 50. The top of the feeding cylinder 40 is connected to the discharge end of the mixing mechanism 30, and multiple discharge ports are evenly distributed at the bottom of the feeding cylinder 40. The feeding cylinder 40 is connected to the lifting mechanism 20 and is used to intermittently move from bottom to top under the drive of the lifting mechanism 20, dropping material during the movement.

[0025] It should be noted that the material layering within the blast furnace 50 can be divided into six layers: a raw material layer 60 and a coke layer 70 laid flat alternately, with the bottom layer being the coke layer 70 laid flat at the bottom of the blast furnace 50. The mixing mechanism 30 serves as a conveying mechanism for alternately feeding ironmaking raw materials and coke into the feeding cylinder 40. After entering the blast furnace 50, the ironmaking raw materials are laid flat to form the raw material layer 60, and the coke is laid flat to form the coke layer 70. Coke and ironmaking raw materials are alternately filled into the feeding cylinder 40, and the lifting mechanism 20 can drive the feeding cylinder 40 to rise. The lifting mechanism 20 raises the feeding cylinder 40, allowing the coke inside to enter the blast furnace 50 through the discharge port and spread evenly within the furnace to form a coke layer 70. The top of the coke layer 70 seals the discharge port, preventing the spillage of coke and ironmaking raw materials from the feeding cylinder 40. The lifting mechanism 20 then raises the feeding cylinder 40 again, spreading the ironmaking raw materials on top of the coke layer 70 to form a raw material layer 60, which also seals the discharge port. This process is repeated to achieve layered material distribution within the blast furnace 50.

[0026] The beneficial effects of the blast furnace ironmaking feeding device provided by this utility model are as follows: Compared with the prior art, this utility model continuously feeds coke into the blast furnace 50 through the mixing mechanism 30 and intermittently feeds iron ore powder. When the iron ore powder is being fed, it can be mixed with coke to form ironmaking raw materials and fed into the blast furnace 50 to form a raw material layer 60. When the iron ore powder is stopped being fed, coke is fed separately into the blast furnace 50 to form a coke layer 70. The intermittent feeding of iron ore powder by the mixing mechanism 30 can realize the alternating feeding of the raw material layer 60 and the coke layer 70. The feeding cylinder 40 extends into the blast furnace 50 and moves upward inside the blast furnace 50 under the drive of the lifting mechanism 20. Ironmaking raw materials and coke alternately enter the blast furnace 50 through various discharge ports, and multiple discharge ports can discharge simultaneously, so that ironmaking raw materials and coke are alternately spread flat inside the blast furnace 50 to form a raw material layer 60 and a coke layer 70. When hot air is blown into the blast furnace 50, the coke layer 70 can burn between the two raw material layers 60, which can improve ironmaking efficiency. When the ironmaking raw materials or coke are continuously discharged until the top surface is level with the discharge port, the ironmaking raw materials or coke can abut against the bottom wall of the feeding cylinder 40 and block the discharge port, which can ensure that ironmaking raw materials and coke alternately enter the blast furnace 50, realize the alternating flatness of the raw material layer 60 and the coke layer 70, make the coke burn more completely, and achieve the full reduction of iron ore powder.

[0027] In one possible implementation, please refer to Figure 2 The mixing mechanism 30 includes a mixing pipe 31, a rotary drive 32, and a rotating shaft 33. The mixing pipe 31 is vertically mounted on the lifting mechanism 20, and has a discharge end at the bottom. The rotary drive 32 is mounted on the lifting mechanism 20 and is located above the mixing pipe 31. The rotating shaft 33 is connected to the output end of the rotary drive 32 and is located inside the mixing pipe 31. The rotating shaft 33 is provided with a spiral blade 34.

[0028] It should be noted that when coke and iron ore powder enter the mixing pipe 31 together, the rotary drive 32 drives the rotating shaft 33 to rotate. When the spiral blades 34 rotate under the drive of the rotating shaft 33, relative motion occurs between the coke and iron ore powder and the spiral blades 34. The spiral blades 34 can push the coke and iron ore powder to move axially along the rotating shaft 33. Due to the difference in gravity and friction between the coke and iron ore powder and the spiral blades 34, relative motion can occur between the coke and iron ore powder, resulting in a mixing effect.

[0029] In one possible implementation, please refer to Figure 2 The mixing pipe 31 is provided with two conveying pipes 35, which are arranged vertically and horizontally; one conveying pipe 35 is used to continuously convey coke into the mixing pipe 31, and the other conveying pipe 35 is used to intermittently convey iron ore powder into the mixing pipe 31.

[0030] It should be noted that one conveying pipe 35 continuously conveys coke into the mixing pipe 31, while the other conveying pipe 35 intermittently conveys iron ore powder into the mixing pipe 31. When the conveying pipe 35 conveys iron ore powder into the mixing pipe 31, the mixing pipe 31 mixes the iron ore powder with coke to form ironmaking raw materials, and the raw materials are then fed into the blast furnace 50 through the feeding cylinder 40 to form a raw material layer 60. When the conveying pipe 35 stops conveying iron ore powder, the mixing pipe 31 conveys coke into the feeding cylinder 40, and the feeding cylinder 40 spreads the coke evenly in the blast furnace 50 to form a coke layer 70. The conveying pipes 35 are arranged vertically and horizontally to avoid mutual interference between the two conveying pipes 35 when conveying coke and iron ore powder into the mixing pipe 31, thereby improving conveying efficiency.

[0031] In one possible implementation, please refer to Figure 2 The spiral blade 34 is located below the feed pipe 35.

[0032] It should be noted that the gap between the spiral blade 34 and the mixing pipe 31 is used to transport coke and ironmaking raw materials. The conveying pipe 35 is located above the spiral blade 34, which can transport coke and iron ore powder from the spiral blade 34 into the mixing pipe 31. This avoids the conveying pipe 35 being set too low, which would cause the coke and ironmaking raw materials in the spiral blade 34 to flow back into the conveying pipe 35 and affect the conveying of iron ore powder.

[0033] In one possible implementation, please refer to Figure 3The feeding cylinder 40 includes a cylinder body 41, a collecting hopper 42, a collecting chamber 43, and multiple feeding pipes 44. The cylinder body 41 is located inside the blast furnace 50 and is connected to the lifting mechanism 20. The collecting hopper 42 is located inside the cylinder body 41 and is attached to the inner wall of the cylinder body 41. The collecting chamber 43 is located inside the cylinder body 41 and is located below the collecting hopper 42. The collecting chamber 43 is connected to the collecting hopper 42. Each feeding pipe 44 is located below the collecting chamber 43 and is connected to the collecting chamber 43. The bottom of the feeding pipe 44 forms a discharge port.

[0034] It should be noted that the collecting hopper 42 can be funnel-shaped, and can transport the ironmaking raw materials and coke to the collecting chamber 43 for collection after receiving them. The ironmaking raw materials and coke in the collecting chamber 43 alternately enter each feeding pipe 44, and can enter the ironmaking furnace 50 alternately to form the raw material layer 60 and the coke layer 70 when the feeding cylinder 40 moves upward.

[0035] In one possible implementation, please refer to Figure 3 The hopper 42 is equipped with a spiral pipe 45, and the hopper 42 is connected to the collection chamber 43 through the spiral pipe 45.

[0036] It should be noted that the ironmaking raw materials and coke entering the collecting hopper 42 enter the collecting chamber 43 through the spiral pipe 45. After the mixing mechanism 30 transports the ironmaking raw materials and coke to the collecting hopper 42, the spiral pipe 45 can receive the ironmaking raw materials and coke and slow down the falling speed of the ironmaking raw materials and coke, so that the ironmaking raw materials and coke fall smoothly into each feeding pipe 44 when entering the collecting chamber 43. This ensures that each feeding pipe 44 is filled with an equal amount of ironmaking raw materials and coke, and that the ironmaking raw materials and coke are evenly spread in the ironmaking furnace 50. This enables the alternating layering of the raw material layer 60 and the coke layer 70, thereby improving ironmaking efficiency.

[0037] In one possible implementation, please refer to Figure 3 The bottom of the material collection chamber 43 is conical.

[0038] It should be noted that when the ironmaking raw materials and coke enter the collecting chamber 43 at intervals, the conical bottom surface of the collecting chamber 43 allows the ironmaking raw materials and coke to enter each feeding pipe 44 by their own gravity, thus avoiding the accumulation of ironmaking raw materials and coke in the collecting chamber 43 and affecting ironmaking.

[0039] In one possible implementation, please refer to Figure 5 Each of the feeding pipes 44 is arranged in a ring array.

[0040] It should be noted that the various feeding pipes 44 are arranged in a ring array. When the feeding pipes 44 move upward, they can ensure that the ironmaking raw materials and coke have the same spacing when entering the ironmaking furnace 50 through each discharge port. The ironmaking raw materials and coke piled up in multiple places can come into contact with each other, realizing the flat distribution of ironmaking raw materials and coke in the ironmaking furnace 50 and improving ironmaking efficiency.

[0041] In one possible implementation, please refer to Figure 4 The lifting mechanism 20 includes a mounting frame 21 and two telescopic drive components 22. The mounting frame 21 is located above the frame 10. The mixing mechanism 30 and the feeding cylinder 40 are both mounted on the mounting frame 21. The two telescopic drive components 22 are both mounted on the frame 10 and are located on both sides of the blast furnace 50. The output end of the telescopic drive component 22 is connected to the mounting frame 21.

[0042] It should be noted that the telescopic drive component 22 can be a jack. The two telescopic drive components 22 located on both sides of the mixing mechanism 30 jointly drive the mounting frame 21 to move vertically, and can drive the feeding cylinder 40 to move vertically in the blast furnace 50 to achieve layered material distribution in the blast furnace 50. The two telescopic drive components 22 can maintain the balance of the feeding cylinder 40 during the movement and prevent the feeding cylinder 40 from tilting.

[0043] In one possible implementation, the mounting bracket 21 is provided with a support leg 211, which abuts against the top wall of the frame 10.

[0044] It should be noted that when the feeding cylinder 40 enters the blast furnace 50 and the mixing mechanism 30 conveys blast furnace raw materials and coke into the feeding cylinder 40, the mounting frame 21 abuts against the top wall of the frame body 10 through the support legs 211, so as to avoid the telescopic drive component 22 being subjected to pressure for a long time and improve the service life of the device.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A charging device for blast furnace ironmaking, characterized in that, include: A frame is installed above the blast furnace, and a lifting mechanism is provided on the frame; A mixing mechanism is mounted on the lifting mechanism and located above the blast furnace; the mixing mechanism is used to continuously convey coke from top to bottom and intermittently mix iron ore powder into the coke. The feeding cylinder is located below the mixing mechanism and extends into the blast furnace. The top of the feeding cylinder is connected to the discharge end of the mixing mechanism. Multiple discharge ports are evenly distributed at the bottom of the feeding cylinder. The feeding cylinder is connected to the lifting mechanism and is used to move intermittently from bottom to top under the drive of the lifting mechanism and drop material during the movement.

2. The blast furnace ironmaking feeding device as described in claim 1, characterized in that, The mixing mechanism includes: A mixing pipe is vertically mounted on the lifting mechanism, and the discharge end is located below the mixing pipe; A rotary drive component is mounted on the lifting mechanism and located above the mixing pipe; A rotating shaft, connected to the output end of the rotary drive, is located inside the mixing tube, and the rotating shaft is provided with helical blades.

3. The blast furnace ironmaking feeding device as described in claim 2, characterized in that, The mixing pipe is provided with two conveying pipes, which are arranged vertically and horizontally; one of the conveying pipes is used to continuously convey coke into the mixing pipe, and the other conveying pipe is used to intermittently convey iron ore powder into the mixing pipe.

4. The blast furnace ironmaking feeding device as described in claim 3, characterized in that, The spiral blades are located below the feed pipe.

5. The blast furnace ironmaking feeding device as described in claim 1, characterized in that, The feeding cylinder includes: A cylindrical body is located inside the blast furnace, and the cylindrical body is connected to the lifting mechanism; A material collection hopper is disposed inside the cylinder and is attached to the inner wall of the cylinder. A material collection chamber is provided inside the cylinder and located below the material collection hopper; the material collection chamber is connected to the material collection hopper. Multiple feeding pipes are located below the material collection chamber and are all connected to the material collection chamber, with the discharge port formed at the bottom of the feeding pipes.

6. The blast furnace ironmaking feeding device as described in claim 5, characterized in that, The hopper is equipped with a spiral pipe, and the hopper is connected to the collection chamber through the spiral pipe.

7. The blast furnace ironmaking feeding device as described in claim 5, characterized in that, The bottom of the collection chamber is conical.

8. The blast furnace ironmaking feeding device as described in claim 5, characterized in that, The feed tubes are arranged in a ring array.

9. The blast furnace ironmaking feeding device as described in claim 1, characterized in that, The lifting mechanism includes a mounting frame and two telescopic drive components. The mounting frame is located above the frame body, and the mixing mechanism and the feeding cylinder are both mounted on the mounting frame. The two telescopic drive components are both mounted on the frame body and are located on both sides of the blast furnace. The output end of the telescopic drive component is connected to the mounting frame.

10. The blast furnace ironmaking feeding device as described in claim 9, characterized in that, The mounting frame is equipped with legs, which abut against the top wall of the frame.

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