Rotary feeding device for electric arc furnace

Abstract

The rotary feeding device for the electric arc furnace comprises a feeding rotary pipeline and a base, a spiral track is arranged in the feeding rotary pipeline, the exterior of the feeding rotary pipeline is connected with the base through a rotating device, and the rotating device drives the feeding rotary pipeline to rotate along the axis of the pipeline. The feeding rotary pipeline and the horizontal plane form an inclined angle, and the arrangement height of a feeding port of the feeding rotary pipeline is larger than that of a discharging port of the feeding rotary pipeline. The waste steel preheating device has the beneficial effects that the problems that in the prior art, waste steel is heated unevenly, and the heating effect is poor are solved, the waste steel is rotated through the feeding rotating pipeline, hot air can fully heat the waste steel, and the preheating effect is effectively improved. And on the basis, the overall structure of the feeding device is further designed and adjusted, so that the feeding device can stably rotate and operate, feeding operation is facilitated, the working efficiency of electric arc steelmaking is effectively improved, and the feeding device is suitable for popularization and application.

Description

Technical Field

[0001] The invention relates to the field of electric arc furnace steelmaking, and more particularly to a rotary charging device for an electric arc furnace. Background Art

[0002] The conventional continuous charging device of electric arc furnace usually has a channel on the side of the electric arc furnace. A fan is set at the other end of the channel to exhaust air, so that the hot air of the electric arc furnace passes through the scrap steel heating channel to heat the scrap steel.

[0003] The disadvantage of the above technology is that the hot air flows through the upper end of the scrap steel heating channel, which has a good heating effect on the upper scrap steel but a poor heating effect on the lower scrap steel, resulting in uneven heating of the scrap steel and poor heating effect. Summary of the invention

[0004] The invention overcomes the shortcomings of the prior art and provides a rotary charging device for an electric arc furnace.

[0005] The purpose of the present invention is achieved through the following technical solutions.

[0006] The rotary charging device for electric arc furnace comprises a charging rotary pipe and a base. The inside of the charging rotary pipe is provided with a spiral track. The outside of the charging rotary pipe is connected with the base through a rotating device. The rotating device drives the charging rotary pipe to rotate along the pipe axis.

[0007] The feeding rotary pipeline is arranged at an angle with the horizontal plane, and the setting height of the feeding inlet of the feeding rotary pipeline is higher than the setting height of the feeding rotary pipeline outlet.

[0008] The top surface of the base is a sloped surface, and the sloped surface of the base is parallel to the pipeline axis of the feeding rotary pipeline.

[0009] The rotating device includes a power device and a supporting wheel sliding group. The power devices are symmetrically arranged in groups of two on bases on both sides of the feeding rotating pipe. The power device is provided with a rotating motor. The rotating shaft of the rotating motor is provided with a first driving gear. The first driving gear is meshed with a second driving gear arranged on the outer surface of the feeding rotating pipe. The supporting wheel sliding group is matched with the outer wall of the feeding rotating pipe.

[0010] A plurality of rotating convex rings are arranged on the outer wall of the feeding rotating pipe, and a second driving gear is arranged on the rotating convex ring corresponding to the power device.

[0011] The roller sliding group includes vertical rollers and horizontal rollers. The vertical rollers are arranged in pairs on the bases on both sides of the corresponding rotating convex rings, and the vertical rollers are in contact with the outer ring surface of the rotating convex ring. The horizontal rollers are arranged on the base, and the horizontal rollers are in contact with the ring side surface of the rotating convex ring.

[0012] A heat-resistant layer is provided on the inner wall of the feeding rotating pipe.

[0013] The discharge port of the feeding rotary pipeline is connected to the electric arc furnace through a movable preheating channel, and a feeding device and a blasting device are correspondingly arranged at the feeding port end of the feeding rotary pipeline.

[0014] A cooling device is provided on the mobile preheating channel.

[0015] The beneficial effects of the present invention are:

[0016] This solution overcomes the problems of uneven heating of scrap steel and poor heating effect in the prior art, and adopts a feeding rotating pipe to rotate the scrap steel so that the hot air can fully heat the scrap steel, effectively increasing the preheating effect.

[0017] On this basis, the overall structure of the feeding device was further designed and adjusted so that it can rotate stably and facilitate feeding operation, which effectively increases the working efficiency of electric arc steelmaking and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the spiral track;

[0020] Figure 3 is a schematic structural diagram of a second driving gear;

[0021] Figure 4 is a front view of the present invention;

[0022] Figure 5 It is the installation schematic diagram of the present invention;

[0023] In the figure: 1. feeding rotating pipeline; 11. rotating convex ring; 12. second driving gear; 13. heat-resistant layer; 2. base; 3. spiral track; 4. power device; 41. first driving gear; 5. supporting roller sliding group; 51. vertical supporting roller; 52. horizontal supporting roller; 6. mobile preheating channel; 61. cooling device; 7. electric arc furnace; 8. feeding device; 9. blasting device. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described below through specific embodiments.

[0025] Example

[0026] The rotary charging device for electric arc furnace comprises a rotary charging pipe 1 and a base 2. The interior of the rotary charging pipe 1 is provided with a spiral track 3. The exterior of the rotary charging pipe 1 is connected to the base 2 through a rotary device. The rotary device drives the rotary charging pipe 1 to rotate along the pipe axis.

[0027] The feeding rotary pipeline 1 is arranged at an angle with the horizontal plane, and the setting height of the feeding port of the feeding rotary pipeline 1 is higher than the setting height of the feeding rotary pipeline 1.

[0028] The top surface of the base 2 is a sloped surface, and the sloped surface of the base 2 is parallel to the pipeline axis of the feeding rotary pipeline 1.

[0029] The rotating device includes a power device 4 and a supporting wheel sliding group 5. The power devices 4 are symmetrically arranged in a group of two on the base 2 on both sides of the feeding rotating pipeline 1. The power device 4 is provided with a rotating motor. The rotating shaft of the rotating motor is provided with a first driving gear 41. The first driving gear 41 is meshed with a second driving gear 12 arranged on the outer surface of the feeding rotating pipeline 1. The supporting wheel sliding group 5 is matched with the outer wall of the feeding rotating pipeline 1.

[0030] A plurality of rotating convex rings 11 are arranged on the outer wall of the feeding rotating pipe 1 , and a second driving gear 12 is arranged on the rotating convex ring 11 corresponding to the power device 4 .

[0031] The roller sliding group 5 includes a vertical roller 51 and a horizontal roller 52. The vertical rollers 51 are arranged in pairs on the base 2 on both sides of the corresponding rotating convex ring 11, and the vertical rollers 51 are in contact with the outer ring surface of the rotating convex ring 11. The horizontal rollers 52 are arranged on the base 2, and the horizontal rollers 52 are in contact with the ring side surface of the rotating convex ring 11.

[0032] A heat-resistant layer 13 is provided on the inner wall of the feeding rotary pipeline 1 .

[0033] The discharge port of the feeding rotary pipeline 1 is connected to the electric arc furnace 7 through the movable preheating channel 6, and the feeding port end of the feeding rotary pipeline 1 is correspondingly provided with a feeding device 8 and a blasting device 9.

[0034] A cooling device 61 is provided on the movable preheating channel 6 .

[0035] The working principle of the present invention is as follows: Figure 1 As shown, the feeding rotary pipeline 1 is driven by the power device 4 to rotate along the pipeline axis, and the hot air cooperates with the spiral track 3 to fully heat the scrap steel and then feed it into the electric arc furnace 7.

[0036] like Figure 2 As shown, in this embodiment, the spiral track 3 is made of refractory bricks and is used to guide the scrap steel to move from the feed port to the discharge port, so that the scrap steel is turned from the bottom to the top in the feeding rotating pipe 1 as the feeding rotating pipe 1 rotates.

[0037] Furthermore, in order to prevent the feeding rotating pipe 1 from being damaged by excessive temperature, a heat-resistant layer 13 is provided. In this embodiment, the heat-resistant layer 13 is made of knotted material, which can withstand high temperature and impact. The heat-resistant layer 13 is attached to the inner wall of the feeding rotating pipe 1 to prevent the feeding rotating pipe 1 from being deformed by heat.

[0038] like Figure 1-4 As shown, in order to make the rotation of the feeding rotating pipe 1 more stable, a plurality of rotating convex rings 11 are provided. In this embodiment, the rotating convex rings 11 are equidistantly arranged on the outside of the feeding rotating pipe 1. The rotating convex ring 11 located closest to the discharge port is provided with a second driving gear 12, which is meshed with the first driving gear 41, and the rotation function is realized by the motor in the power device 4.

[0039] Furthermore, in this embodiment, in order to make the scrap steel easier to feed, an inclination angle is provided to raise the height of the feed port, so as to facilitate the scrap steel to be fed from the feed port and to enter the electric arc furnace 7 from the discharge port. Therefore, the roller sliding group 5 adopts a combination of two vertical rollers 51 and one horizontal roller 52, which respectively support the two sides and the force-bearing side of the corresponding rotating convex ring 11. In actual production applications, the horizontal rollers 52 can also be in plural form and are arranged corresponding to the two side walls of the rotating convex ring 11.

[0040] Furthermore, in order to make the power device 4 and the supporting wheel sliding group 5 more stable, the top surface of the base 2 has the same inclination angle as the feeding rotary pipeline 1. Preferably, in order to reduce the overall weight, the base 2 adopts a bracket structure.

[0041] like Figure 5 As shown, the feeding port of the feeding rotary pipeline 1 is provided with a feeding device 8 and a blasting device 9, which are used to feed the scrap steel material and provide negative pressure respectively, to extract the hot air in the electric arc furnace 7, and make it enter the feeding rotary pipeline 1 to preheat the scrap steel. The discharge port of the feeding rotary pipeline 1 is connected to the electric arc furnace through the mobile preheating channel 6. The bottom of the mobile preheating channel 6 adopts a mobile trolley to realize the mobile function. Since the temperature of the hot air just extracted from the electric arc furnace 7 is too high, in order to avoid overheating in the preheating channel, a cooling device 61 is provided. In this embodiment, the cooling device 61 adopts a water cooling device to cool the pipeline.

[0042] The working process of the present invention is specifically as follows:

[0043] The equipment is turned on, and the rotary charging device for the electric arc furnace starts to work. Scrap enters the electric arc furnace 7 along the feeding device 8, the charging rotary pipeline 1 and the movable preheating channel 6. The hot air in the electric arc furnace 7 moves along the electric arc furnace 7, the movable preheating channel 6, the charging rotary pipeline 1 and the feeding device 8 under the action of the blast device 9.

[0044] The heating source of the scrap steel is the high temperature gas in the electric arc furnace 7. In the charging rotary pipe 1, the hot air heats the scrap steel. Since the charging rotary pipe 1 rotates continuously, the scrap steel is driven to rotate. During the process of the scrap steel being heated by the hot air, the heat is evenly distributed.

[0045] The embodiments of the present invention are described in detail above, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A rotary charging device for an electric arc furnace, characterized in that: It comprises a feeding rotating pipe and a base. A spiral track is arranged inside the feeding rotating pipe. The outside of the feeding rotating pipe is connected with the base through a rotating device. The rotating device drives the feeding rotating pipe to rotate along the pipe axis.

2. The rotary charging device for an electric arc furnace according to claim 1, characterized in that: The feeding rotary pipeline is arranged at an angle with the horizontal plane, and the setting height of the feeding port of the feeding rotary pipeline is higher than the setting height of the feeding rotary pipeline outlet.

3. The rotary charging device for an electric arc furnace according to claim 2, characterized in that: The top surface of the base is a sloped surface, and the sloped surface of the base is parallel to the pipeline axis of the feeding rotary pipeline.

4. The rotary charging device for an electric arc furnace according to claim 1, characterized in that: The rotating device includes a power device and a supporting wheel sliding group. The power devices are symmetrically arranged in a group of two on the bases on both sides of the feeding rotating pipe. The power device is provided with a rotating motor. The rotating shaft of the rotating motor is provided with a first driving gear. The first driving gear is meshed with a second driving gear arranged on the outer surface of the feeding rotating pipe. The supporting wheel sliding group is matched with the outer wall of the feeding rotating pipe.

5. The rotary charging device for an electric arc furnace according to claim 4, characterized in that: A plurality of rotating convex rings are arranged on the outer wall of the feeding rotating pipe, and the second driving gear is arranged on the rotating convex ring corresponding to the power device.

6. The rotary charging device for an electric arc furnace according to claim 5, characterized in that: The roller sliding group includes vertical rollers and horizontal rollers. The vertical rollers are arranged in pairs on the base corresponding to the two sides of the rotating convex ring, and the vertical rollers are in contact with the outer ring surface of the rotating convex ring. The horizontal rollers are arranged on the base, and the horizontal rollers are in contact with the ring side surface of the rotating convex ring.

7. The rotary charging device for an electric arc furnace according to claim 1, characterized in that: A heat-resistant layer is provided on the inner wall of the feeding rotating pipeline.

8. The rotary charging device for an electric arc furnace according to claim 1, characterized in that: The discharge port of the feeding rotary pipeline is connected to the electric arc furnace through a movable preheating channel, and a feeding device and a blasting device are correspondingly arranged at the feeding port end of the feeding rotary pipeline.

9. The rotary charging device for an electric arc furnace according to claim 8, characterized in that: A cooling device is provided on the mobile preheating channel.

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