A steelmaking scrap roasting preheating device and method thereof

Abstract

The application discloses a steelmaking scrap steel baking preheating device and a method thereof, and belongs to the technical field of steelmaking. The device comprises a frame, a support fixedly installed on the inner side of the frame, a preheating cylinder rotatably installed in the support, a transmission member connected to the cylinder body of the preheating cylinder, and a baking device installed at the bottom of the frame. The baking device comprises a main gas pipe, an air source connected to the input end of the main gas pipe, a gas distribution pipe installed between adjacent main gas pipes, and an igniter installed on the pipe body of the gas distribution pipe. The preheating cylinder is driven to rotate by the motor, so that the scrap steel in the preheating cylinder is uniformly baked and heated. The device can produce a dynamic preheating and baking effect on the scrap steel. The preheating cylinder is uniformly heated and rapidly transfers heat. The preheating cylinder rotates and can produce an effect similar to internal stirring, avoids the phenomenon that baking and heating are uneven due to material accumulation, guarantees the quality of scrap steel preheating, and is beneficial to the refining of the scrap steel in the later period.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steelmaking, more particularly, to a steelmaking scrap steel baking preheating device and method thereof. BACKGROUND

[0002] Nowadays, in the converter blowing process, scrap steel is directly loaded into the scrap steel tank and added into the converter for blowing. In this way, a large amount of heating is needed in the converter to melt the scrap steel. Moreover, the temperature of the molten iron cannot be too low when melting the scrap steel. If the temperature of the molten iron does not meet the standard, the slag melting will be slow in the heating process. If the heating time of the molten iron is long, the metal material (molten iron) consumption will increase, that is, the iron consumption will increase.

[0003] The existing preheating baking device has a fixed structure, that is, it directly bakes the accumulated scrap steel. Since the heat transfer coefficient of the scrap steel is large after being accumulated, the internal baking temperature is uneven, thereby limiting the preheating effect of the scrap steel, and affecting the melting of the scrap steel in the later converter SUMMARY

[0004] 1. Technical problems to be solved by the present application

[0005] In view of the defects and deficiencies of the prior art, the present application provides a steelmaking scrap steel baking preheating device and method thereof. The present application drives the preheating cylinder to rotate as a fixed shaft, so that the scrap steel in the preheating cylinder is uniformly baked and heated. The device can produce a dynamic preheating baking effect on the scrap steel. The preheating cylinder is uniformly heated and the heat transfer is rapid. The preheating cylinder rotates at the same time to produce an effect similar to internal stirring, avoiding the phenomenon of uneven baking and heating due to material accumulation, ensuring the quality of scrap steel preheating, and being beneficial to the refining of scrap steel in the later stage.

[0006] 2. Technical solutions

[0007] To achieve the above-mentioned purposes, the technical solutions provided by the present application are as follows:

[0008] The present application provides a steelmaking scrap steel baking preheating device, which comprises a frame, a support member fixedly installed on the inner side of the frame, a preheating cylinder rotatably installed in the support member, a transmission member connected to the cylinder body of the preheating cylinder, and a baking device installed at the bottom of the frame.

[0009] A fixed plate is fixedly installed on the outer side of the frame, a motor is fixedly installed above the fixed plate, and the output end of the motor is connected with the transmission member.

[0010] The transmission member comprises a driving gear and a driven gear. A transmission groove is formed in the upper surface of the frame, the driving gear is rotatably installed in the transmission groove, the output end of the motor penetrates through the frame and is fixedly connected with the driving gear, a driven gear is fixedly installed in the middle part of the cylinder body of the preheating cylinder, and the driving gear and the driven gear are engaged.

[0011] The roasting device comprises main air pipes, the main air pipes are fixedly installed below the frame, the input ends of the main air pipes are externally connected with air sources, and the main air pipes are provided with a plurality of air distribution pipes installed between adjacent main air pipes.

[0012] Further, the main air pipes are provided with two main air pipes arranged symmetrically.

[0013] Further, the air distribution pipes are provided with a plurality of air distribution pipes arranged at equal intervals.

[0014] Further, one end of the preheating cylinder is provided with an opening, a sealing cover is arranged at the port of the opening, a threaded through hole is formed in the sealing cover, a threaded blind hole is formed in the preheating cylinder at a position corresponding to the threaded through hole, a bolt is arranged in the threaded through hole, and the bolt penetrates through the threaded through hole and is assembled with the threaded blind hole of the preheating cylinder.

[0015] Further, the motor is externally connected with a power source.

[0016] Further, the support members are provided with a plurality of groups and are arranged at equal intervals outside the preheating cylinder.

[0017] Further, the support member comprises a support and a sleeve ring, the support is fixedly installed on the inner side of the frame, the bottom of the support is fixedly connected with the sleeve ring, the inner ring of the sleeve ring is installed with a bearing, and the preheating cylinder penetrates through the bearing and is rolling matched with the bearing.

[0018] Further, the support is provided with a plurality of supports arranged symmetrically outside the sleeve ring.

[0019] A method for roasting and preheating waste steel in steelmaking, comprising the following steps: when in use, first, waste steel to be roasted is placed in a preheating cylinder, a threaded through hole above a sealing cover is matched with a threaded blind hole in the preheating cylinder, a bolt is screwed into the threaded blind hole, and the preheating cylinder is sealed.

[0020] The igniter is started, the main air pipe introduces the externally connected air source into the air distribution pipe, the igniter supports ignition through the air distribution pipe, and the waste steel in the preheating cylinder can be preheated and roasted.

[0021] Meanwhile, the motor is started, the motor drives the driving gear to rotate, the driving gear drives the driven gear to rotate, the preheating cylinder is connected with the sleeve ring to rotate relatively under the action of the bearing, the preheating cylinder rotates as a fixed shaft, the waste steel in the preheating cylinder is uniformly roasted and heated, the quality of preheating of the waste steel is ensured, and the refining of the waste steel in the later stage is facilitated.

[0022] 3. Beneficial effects

[0023] Compared with the prior art, the technical scheme provided by the present application has the following beneficial effects:

[0024] The application drives the preheating cylinder to rotate as a fixed shaft by the motor, so that the scrap steel in the preheating cylinder is uniformly baked and heated, the device can produce a dynamic preheating and baking effect on the scrap steel, the preheating cylinder is uniformly heated and rapidly transmits heat, the preheating cylinder rotates at the same time to produce an effect similar to internal stirring, avoids the phenomenon of uneven baking and heating caused by material accumulation, ensures the quality of scrap steel preheating, and is beneficial to the refining of scrap steel in the later period. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a perspective structural schematic view of the application;

[0026] Figure 2 It is an exploded view of the preheating cylinder of the application;

[0027] Figure 3 It is a structural schematic view of the preheating cylinder of the application;

[0028] Figure 4 It is a structural schematic view of the application.

[0029] In the figure: 1, frame; 2, preheating cylinder; 3, sealing cover; 4, bolt; 5, baking device; 6, support; 7, fixed plate; 8, motor; 9, transmission part; 10, driving gear; 11, driven gear; 12, collar; 13, support; 14, bearing; 15, main gas pipe; 16, gas distribution pipe; 17, igniter. DETAILED DESCRIPTION

[0030] The application will be further described below in combination with the drawings and examples:

[0031] Example 1

[0032] From Figures 1-4 It can be seen that the steelmaking scrap steel baking and preheating device of the embodiment comprises a frame 1, a support 6 is fixedly installed on the inner side of the frame 1, a preheating cylinder 2 is rotatably installed in the support 6, a transmission part 9 is connected to the cylinder body of the preheating cylinder 2, and a baking device 5 is installed at the bottom of the frame 1;

[0033] A fixed plate 7 is fixedly installed on the outer side of the frame 1, a motor 8 is fixedly installed above the fixed plate 7, the motor 8 is connected with a power supply, and the output end of the motor 8 is connected with the transmission part 9;

[0034] The transmission part 9 comprises a driving gear 10 and a driven gear 11, a transmission groove is formed in the upper surface of the frame 1, the driving gear 10 is rotatably installed in the transmission groove, the output end of the motor 8 penetrates through the frame 1 and is fixedly connected with the driving gear 10, the driven gear 11 is fixedly installed in the middle of the cylinder body of the preheating cylinder 2, and the driving gear 10 and the driven gear 11 are engaged;

[0035] The baking device 5 comprises a main air pipe 15, which is provided with multiple main air pipes 15 as required, and in the embodiment, two main air pipes 15 are provided, which are symmetrically arranged, and the main air pipe 15 is fixedly installed below the frame 1, the input end of the main air pipe 15 is connected with an air source, and a gas distribution pipe 16 is installed between adjacent main air pipes 15, and the gas distribution pipe 16 is provided with multiple gas distribution pipes 16, which are arranged at equal intervals, and the gas distribution pipe 16 is provided with multiple ignition devices 17.

[0036] One end of the preheating cylinder 2 is provided with an opening, and a sealing cover 3 is arranged at the opening, the sealing cover 3 is provided with a threaded hole, the preheating cylinder 2 is provided with a threaded blind hole at a position corresponding to the threaded hole, and a bolt 4 is arranged in the threaded hole and penetrates the threaded hole and is assembled with the threaded blind hole of the preheating cylinder 2.

[0037] The support 6 is provided with multiple groups and is arranged at intervals outside the preheating cylinder 2, and the support 6 comprises a bracket 13 and a sleeve ring 12, the bracket 13 is fixedly installed on the inner side of the frame 1, the bottom of the bracket 13 is fixedly connected with the sleeve ring 12, the inner ring of the sleeve ring 12 is provided with a bearing 14, the preheating cylinder 2 penetrates the bearing 14 and is rollingly connected with the bearing 14, and the bracket 13 is provided with multiple brackets 13, which are symmetrically arranged outside the sleeve ring 12.

[0038] A method for baking and preheating steelmaking scrap steel, the steps are as follows: when in use, first, place the scrap steel to be baked in the preheating cylinder 2, align the threaded hole above the sealing cover 3 with the threaded blind hole in the preheating cylinder 2, screw the bolt 4 into the threaded blind hole, and seal the preheating cylinder 2;

[0039] Start the igniter 17, the main air pipe 15 introduces the air source connected outside into the gas distribution pipe 16, the igniter 17 supports ignition through the gas distribution pipe 16, and the scrap steel in the preheating cylinder 2 can be preheated and baked;

[0040] At the same time, the motor 8 is started, the motor 8 drives the driving gear 10 to rotate, the driving gear 10 drives the driven gear 11 to rotate, and the preheating cylinder 2 is connected with the sleeve ring 12 in relative rotation under the action of the bearing 14, so that the preheating cylinder 2 rotates as a fixed shaft, so that the scrap steel in the preheating cylinder 2 is uniformly baked and heated, the quality of the preheating of the scrap steel is ensured, and the refining of the scrap steel in the later stage is facilitated.

[0041] Multiple baking devices 5 are uniformly arranged on the bottom of the preheating cylinder 2, and the baking effect of the baking device 5 can cover any surface of the preheating cylinder 2 during the rotation of the preheating cylinder 2, so that the heating area of the preheating cylinder 2 is larger, the heating effect is more uniform, and the heat transfer speed is faster.

[0042] The application drives the preheating cylinder 2 to rotate as a fixed shaft by the motor 8, so that the scrap steel in the preheating cylinder 2 is uniformly baked and heated, the device can produce the effect of dynamic preheating and baking on the scrap steel, the preheating cylinder 2 is uniformly heated, the heat is rapidly transferred, the preheating cylinder 2 rotates at the same time and can also produce the effect similar to internal stirring, avoids the phenomenon that the baking and heating are uneven due to material accumulation, guarantees the quality of scrap steel preheating, and is beneficial to the refining of the scrap steel in the later period.

[0043] The above description of the application and its embodiments is illustrative and not restrictive, and the embodiments shown in the drawings are only one of the embodiments of the application, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired thereby, without departing from the purpose of the application, similar structural modes and embodiments can be designed without creativity, which should belong to the protection scope of the application.

Claims

1. A steelmaking scrap roasting preheating device comprising a frame (1), characterized in that: The frame (1) is fixedly installed with a support (6) on the inner side, the support (6) is rotatably installed with a preheating cylinder (2), the cylinder body of the preheating cylinder (2) is connected with a transmission member (9), the bottom of the frame (1) is installed with a baking device (5); The frame (1) is fixedly installed with a fixed plate (7) on the outer side, the upper portion of the fixed plate (7) is fixedly installed with a motor (8), the output end of the motor (8) is connected with the transmission member (9); The transmission member (9) comprises a driving gear (10) and a driven gear (11), the upper surface of the frame (1) is provided with a transmission groove, the driving gear (10) is rotatably installed in the transmission groove, the output end of the motor (8) penetrates through the frame (1) and is fixedly connected with the driving gear (10), the middle portion of the cylinder body of the preheating cylinder (2) is fixedly installed with the driven gear (11), and the driving gear (10) and the driven gear (11) are engaged; The baking device (5) comprises a main gas pipe (15), the lower portion of the frame (1) is fixedly installed with the main gas pipe (15), the input end of the main gas pipe (15) is connected with a gas source, and a plurality of main gas pipes (15) are arranged, a gas distribution pipe (16) is arranged between adjacent main gas pipes (15), and a plurality of igniters (17) are arranged on the pipe body of the gas distribution pipe (16); One end of the preheating cylinder (2) is provided with an opening, the opening is provided with a sealing cover (3), the sealing cover (3) is provided with a threaded hole, the preheating cylinder (2) is provided with a threaded blind hole at the position corresponding to the threaded hole, a bolt (4) is arranged in the threaded hole, and the bolt (4) penetrates through the threaded hole and is assembled with the threaded blind hole of the preheating cylinder (2); The support (6) is provided with a plurality of groups and is arranged at intervals outside the preheating cylinder (2); The support (6) comprises a support (13) and a sleeve ring (12), the support (13) is fixedly installed on the inner side of the frame (1), the bottom of the support (13) is fixedly connected with the sleeve ring (12), the inner circle of the sleeve ring (12) is installed with a bearing (14), and the preheating cylinder (2) penetrates through the bearing (14) and is rolling matched with the bearing (14).

2. A steel scrap roasting and preheating device according to claim 1, characterized in that: The main gas pipe (15) is provided with two, and the two main gas pipes (15) are symmetrically arranged.

3. A steel scrap roasting and preheating device according to claim 1, characterized in that: The gas distribution pipe (16) is provided with a plurality of groups, and the plurality of gas distribution pipes (16) are arranged at equal intervals.

4. A steel scrap roasting and preheating device according to claim 1, characterized in that: The motor (8) is connected with a power supply.

5. A steel scrap roasting and preheating device according to claim 1, characterized in that: The support (13) is provided with a plurality of groups, and the supports (13) are symmetrically arranged on the outer circle of the sleeve ring (12).

6. A method of roasting and preheating scrap steel for steel making as claimed in claim 5 wherein: The steps are as follows: when in use, first, the waste steel to be baked is placed in the preheating cylinder (2), the threaded hole in the upper portion of the sealing cover (3) is matched with the threaded blind hole in the preheating cylinder (2), the bolt (4) is screwed into the threaded blind hole, and the preheating cylinder (2) is sealed; The igniter (17) is started, the gas source connected with the main gas pipe (15) is introduced into the gas distribution pipe (16), the igniter (17) supports ignition through the gas distribution pipe (16), and the waste steel in the preheating cylinder (2) is preheated and baked; Meanwhile, the motor (8) starts, the motor (8) drives the driving gear (10) to rotate, the driving gear (10) drives the driven gear (11) to rotate, due to the preheating cylinder (2) is under the action of bearing (14) and the grommet (12) relative rotation connection is generated, make the preheating cylinder (2) make fixed axle rotation, so that the preheating cylinder (2) in the scrap steel even roasting heat, guarantee the quality of scrap steel preheating, be favorable to the refining of scrap steel later.

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