Semi-closed submerged arc furnace automatic charging device

Abstract

The present invention relates to the technical field of application of electric arc furnaces, and discloses an automatic material distribution device for a semi-closed electric arc furnace, comprising a material bin, a material pipe, a feeder, a chute rotating mechanism, a chute tilting mechanism, and a chute. The material bin is connected to the feeder through the material pipe, and the feeder is connected to the chute through a throat pipe. The chute rotating mechanism is connected to the upper end side of the chute to drive the chute to rotate horizontally, and the chute tilting mechanism is connected to the upper end side of the chute to drive the chute to tilt vertically. A swivel joint is provided on the outer side of the upper end of the chute, and a smoke sealing mechanism is provided at the connection between the throat pipe and the chute. By controlling the rotation angle and the tilting degree, the positioning is accurate, and automatic control is conveniently realized, thereby realizing automatic material replenishment of the semi-closed electric arc furnace, releasing labor, reducing production labor costs, improving equipment automation operation, and meeting the requirements of electric furnace economic indicators.

Description

Technical Field

[0001] The invention relates to the technical field of application of submerged arc furnaces, in particular to an automatic material distribution device for a semi-closed submerged arc furnace. Background Art

[0002] During the production process of smelting various alloys in a semi-closed submerged arc furnace, a large amount of hot furnace gas will be generated in the furnace. The energy of the hot furnace gas is fully utilized to create high-temperature chemical reaction conditions for various raw ores, while maintaining good air permeability of the charge, so as to accelerate the smooth progress of the chemical reaction in the furnace. When the air permeability in the submerged arc furnace is good, it can not only fully utilize the heat energy of the high-temperature furnace gas to preheat the charge and reduce the volatilization loss of the main raw materials, but also help to reduce the temperature gradient in the furnace, improve the current distribution, and ensure deep and stable insertion of the electrode. Ultimately, the furnace temperature is maintained or increased, and the "crucible" area of ​​the submerged arc furnace electrode is expanded. A very important link in this regard is the uniform entry of raw materials into the furnace and the precise delivery of the required material surface, so that the various required raw materials in the reaction zone of the electric furnace are saturated and chemical reactions occur.

[0003] Traditional manual feeding and manual rotating feeding troughs have the characteristics of high labor intensity, high labor costs and difficulty in recruiting workers; as well as the many unfavorable factors mentioned above, such as poor furnace stability, uneven distribution, and poor economic and technical indicators of electric furnaces in the feeding system of the ore-fired furnace pipe and the belt feeder. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] The purpose of the present invention is to provide an automatic material distribution device for a semi-closed submerged arc furnace, so as to solve the problems of uneven material distribution and high manual labor intensity in the prior art.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, the present invention provides an automatic feeding device for a semi-closed electric arc furnace, comprising a material bin, a material pipe, a feeder, a chute rotating mechanism, a chute tilting mechanism and a chute, wherein the material bin is connected to the feeder through the material pipe, the feeder is connected to the chute through a throat, the throat is connected to the chute rotating mechanism through a rotating sleeve, the chute rotating mechanism is connected to the upper end of the chute to drive the chute to rotate horizontally, and the chute tilting mechanism is connected to the upper end of the chute to drive the chute to tilt vertically; a swivel joint is provided on the outer side of the upper end of the chute, one end of the swivel joint is rotatably connected to the rotating sleeve, and the other end of the swivel joint is fixedly connected to the chute; a smoke sealing mechanism is provided at the connection between the throat and the chute, and the smoke sealing mechanism is installed on the rotating sleeve to reduce smoke leakage of the electric arc furnace.

[0008] Wherein, the chute rotating mechanism includes a fixed support plate and a rotary support plate which are sleeved on the lower end of the throat pipe, a reducer is provided on the fixed support plate, and the driving end of the reducer drives the rotary support plate to rotate, and the upper end of the chute is connected to the bottom side of the rotary support plate.

[0009] Wherein, the driving end of the reducer is provided with a driving wheel, and the rotary support plate is provided with gear teeth meshing with the driving wheel.

[0010] The slewing support plate is welded to the rotating sleeve, the upper end of the chute passes through the central through hole of the slewing support plate, and one side of the upper end of the chute is hinged to the rotating sleeve through a fixing pin.

[0011] Wherein, the other side of the upper end of the chute is hinged to the chute tilting mechanism, and the chute tilting mechanism is arranged on the slewing support plate.

[0012] Wherein, the chute tilting mechanism includes a hydraulic cylinder, the hydraulic cylinder is fixed on the slewing support plate, and the driving end of the hydraulic cylinder is connected to the chute through a lever pendulum.

[0013] Among them, the lever pendulum includes a rotary lever, one end of which is slidably arranged in a first slide groove and connected to the driving end of the hydraulic cylinder, and the other end of the rotary lever is slidably arranged in a second slide groove and connected to the chute through an output lever.

[0014] Wherein, the slewing lever is horizontally arranged on the slewing support plate through a slewing lever support member, and the middle part of the slewing lever is rotatably pin-connected to the slewing lever support member through a pin shaft.

[0015] Wherein, the first sliding groove and the second sliding groove are vertically arranged on the slewing support plate along the driving direction of the driving shaft of the hydraulic cylinder.

[0016] Wherein, the throat pipe and the outer side of the chute are both provided with water cooling pipelines.

[0017] (III) Beneficial effects

[0018] The present invention provides an automatic charging device for a semi-closed submerged arc furnace. Through the vibration of the feeder, the charge in the silo passes through the material pipe and the throat and enters the chute. The chute rotating mechanism controls the horizontal rotation of the chute. The swivel joint is used to support the rotation of the chute. The chute tilting mechanism drives the chute to tilt vertically, so that the charge is distributed on different annular surfaces to achieve uniform charging. By controlling the rotation angle and the tilting degree, the positioning is accurate, and automatic control is easy to achieve, thereby realizing automatic charging of the semi-closed submerged arc furnace, releasing labor, reducing production labor costs, improving equipment automation operation, and meeting the requirements of electric furnace economic indicators. The smoke sealing mechanism can reduce smoke leakage of the submerged arc furnace and improve the operation rate of the submerged arc furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0020] Figure 2 It is a structural schematic diagram of a chute rotating mechanism according to an embodiment of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the chute tilting mechanism according to an embodiment of the present invention.

[0022] In the figure, 1: silo; 2: material pipe; 3: feeder; 4: throat; 5: chute rotating mechanism; 51: reducer; 52: driving wheel; 53: fixed support plate; 54: gear; 55: rotary support plate; 6: chute tilting mechanism; 61: hydraulic cylinder; 62: rotary lever; 63: first chute; 64: second chute; 65: rotary lever support; 66: output lever; 7: rotating sleeve; 8: chute. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In addition, in the description of the present invention, unless otherwise specified, "multiple", "multiple roots", and "multiple groups" mean two or more, and "several", "several roots", and "several groups" mean one or more.

[0026] like Figures 1 to 3 As shown, an embodiment of the present invention provides an automatic material distribution device for a semi-closed submerged arc furnace, comprising a silo 1, a material pipe 2, a feeder 3, a chute rotating mechanism 5, a chute tilting mechanism 6 and a chute 8. The silo 1 is connected to the feeder 3 through the material pipe 2, the feeder 3 is connected to the chute 8 through the throat 4, the throat 4 is connected to the chute rotating mechanism 5 through the rotating sleeve 7, the chute rotating mechanism 5 is connected to the upper end of the chute 8 to drive the chute 8 to rotate horizontally, and the chute tilting mechanism 6 is connected to the upper end of the chute 8 to drive the chute 8 to tilt vertically; a swivel joint is provided on the outer side of the upper end of the chute 8, one end of the swivel joint is rotatably connected to the rotating sleeve 7, and the other end of the swivel joint is fixedly connected to the chute 8; a smoke sealing mechanism is provided at the connection between the throat 4 and the chute 8, and the smoke sealing mechanism is installed on the rotating sleeve 7 to reduce smoke leakage of the submerged arc furnace.

[0027] Furthermore, the silo 1 is connected with the feeder 3 through the material pipe 2. The furnace charge is stored in the silo 1. The length of the material pipe 2 is set according to the specific actual requirements on site. The feeder 3 is connected with the chute 8 through the throat 4. Specifically, the furnace charge in the silo 1 passes through the material pipe 2 and then enters the throat 4 through the feeder 3 with uniform vibration. A certain inclination is provided at the connection between the throat 4 and the feeder 3 so that the furnace charge flows into the chute 8 by its own weight, thereby effectively preventing the problem of furnace charge blocking the pipeline.

[0028] Among them, the chute rotating mechanism 5 includes a fixed support plate 53 and a rotary support plate 55 which are sleeved on the lower end of the throat pipe 4. A reducer 51 is provided on the fixed support plate 53 to provide a rotational driving force. The reducer 51 is vertically arranged, and the driving end of the reducer 51 is located at the lower side. The driving end of the reducer 51 is provided with a driving wheel 52.

[0029] The swivel support plate 55 is arranged at the lower side of the fixed support plate 53, the swivel support plate 55 is welded to the rotating sleeve 7, and the upper end of the chute 8 passes through the central through hole of the swivel support plate 55. The swivel support plate 55 is provided with gear teeth 54 meshing with the driving wheel 52. Specifically, the reducer 51 drives the driving wheel 52 to rotate, and the driving wheel 52 drives the swivel support plate 55 to rotate through the gear teeth 54. The swivel support plate 55 is connected to the throat 4 through the rotating sleeve 7 to ensure that the swivel support plate 55 can rotate synchronously with the rotating sleeve 7, and the throat 4 does not rotate. The diameter of the gear teeth 54 is larger than the diameter of the driving wheel 52, and the rotation angle range is large, and the positioning is accurate.

[0030] Furthermore, the chute tilting mechanism 6 includes a hydraulic cylinder 61, which is fixed on the rotary support plate 55. The hydraulic cylinder 61 is vertically arranged, and the driving end of the hydraulic cylinder 61 is located on the upper side. The driving end of the hydraulic cylinder 61 is connected to the chute 8 through a lever pendulum, and the hydraulic cylinder 61 drives the chute to tilt vertically through the lever pendulum.

[0031] Among them, the lever pendulum includes a rotary lever 62, which is fixed on the rotary support plate 53 through a rotary lever support 65. The middle part of the rotary lever 62 is rotatably pinned to the rotary lever support 65 through a pin shaft. In the non-working state, the rotary lever 62 is in a horizontal state.

[0032] Among them, one end of the rotary lever 62 is slidably arranged in the first slide groove 63 and connected to the driving end of the hydraulic cylinder 61. The first slide groove 63 is vertically fixed on the rotary support plate 53. The driving end of the hydraulic cylinder 61 drives one end of the rotary lever 62 to move up and down in the first slide groove 63.

[0033] Among them, the other end of the rotary lever 62 is slidably arranged in the second slide groove 64 and is connected to the chute 8 through the output lever 66. When the driving end of the hydraulic cylinder 61 drives the end of the rotary lever 62 arranged in the first slide groove 63 to move downward, the middle part of the rotary lever 62 rotates around the pin shaft, and the end of the rotary lever 62 arranged in the second slide groove 64 moves upward, thereby driving the chute 8 to tilt.

[0034] Furthermore, one side of the upper end of the chute 8 is hinged to the rotating sleeve 7 through a fixing pin, and the other side is connected to the output lever 66, to ensure that the chute 8 is completely docked with the throat 4 to prevent leakage of the charge. The chute rotating mechanism 5 drives the chute 8 to rotate horizontally, and the chute tilting mechanism 6 drives the chute 8 to tilt vertically, thereby realizing automatic and uniform distribution of the charge.

[0035] Among them, water cooling pipelines are provided on the outside of the throat pipe 4 and the chute 8 to cool the throat pipe 4 and the chute 8 in real time.

[0036] Furthermore, a swivel joint is provided on the outer side of the upper end of the chute 8, one end of the swivel joint is rotatably connected to the rotating sleeve 7, and the other end of the swivel joint is fixedly connected to the chute 8. The swivel joint is specifically an internal pressure water seal swivel joint, including a gland, a clamping member, a hollow shaft and a shell. The end of the shell is open, the first end of the rotating sleeve is inserted in the open, and the second end is sealed and connected to the shell, and the outer diameter of the first end of the rotating sleeve is smaller than the inner diameter of the shell; the first end of the hollow shaft is inserted in the rotating sleeve, and the second end protrudes out of the rotating sleeve, a first sealing ring is provided between the first end of the hollow shaft and the rotating sleeve, and a bearing is provided between the middle part of the hollow shaft and the rotating sleeve; one end of the gland is abutted against the first sealing ring, and the other end is provided with a locking member, the clamping member is used to cooperate and connect with the locking member so that the gland is pressed against the first sealing ring, and a second sealing ring is provided between the gland and the rotating sleeve; the first ends of the hollow shaft and the rotating sleeve have gaps with the top end of the shell to form a cavity, and a water outlet hole connected to the cavity is opened on the side wall of the shell.

[0037] Furthermore, a smoke sealing mechanism is provided at the connection between the throat and the chute, and the smoke sealing mechanism is installed on the rotary sleeve to reduce smoke leakage of the electric arc furnace. Specifically, the smoke sealing device includes: a rotary sleeve platform and a smoke hood fixedly connected to the rotary sleeve, and the rotary sleeve platform is arranged in a circular groove of the smoke hood; an upper half ring is provided on the periphery of the rotary sleeve platform, and the upper half ring is connected to the rotary sleeve platform through an annular groove plate of its inner circle; a lower half ring is provided on the top ring of the smoke hood; the upper half ring and the lower half ring do not contact each other, and the annular groove plate of the outer circle of the upper half ring is arranged in a groove of the lower half ring at intervals, and a smoke sealing medium is provided in the groove, so that the upper half ring and the lower half ring form a labyrinth-like sealing structure.

[0038] The process operation of the embodiment of the present invention is as follows:

[0039] The charge enters the feeder from the silo through the feed pipe, and enters the chute through the throat under the vibration of the feeder;

[0040] The reducer drives the driving wheel forward or reversely, and drives the slewing support plate and the slewing sleeve to rotate through the gear teeth. The slewing support plate and the slewing joint work together to achieve double support for the chute. The slewing sleeve drives the chute to rotate horizontally, and controls the rotation angle to achieve positioning of the material.

[0041] The driving end of the hydraulic cylinder drives one end of the rotary lever to move downward, and the other end of the rotary lever drives one side of the chute to pull upward through the output lever, and the other side of the chute rotates around the fixed pin to realize the dumping of the furnace charge in the chute;

[0042] The smoke sealing mechanism collects the smoke leaking from the connection between the chute and the throat of the submerged arc furnace through the smoke hood, and processes the smoke through the smoke sealing medium, which effectively reduces the failure rate of the submerged arc furnace, reduces the maintenance time of personnel, reduces the risk of occupational diseases of staff, and improves the operation rate of the submerged arc furnace.

[0043] It is worth mentioning that there is enough charge in the silo to ensure that there is always charge flowing into the chute. The reducer automatically repeats forward and reverse rotation, the hydraulic cylinder automatically repeats extension and contraction, and the rotation and tilting of the chute are carried out simultaneously, thereby achieving automatic and uniform material distribution.

[0044] The present invention provides an automatic charging device for a semi-closed submerged arc furnace. Through the vibration of the feeder, the charge in the silo passes through the material pipe and the throat and enters the chute. The chute rotating mechanism controls the horizontal rotation of the chute. The swivel joint is used to support the rotation of the chute. The chute tilting mechanism drives the chute to tilt vertically, so that the charge is distributed on different annular surfaces to achieve uniform charging. By controlling the rotation angle and the tilting degree, the positioning is accurate, and automatic control is easy to achieve, thereby realizing automatic charging of the semi-closed submerged arc furnace, releasing labor, reducing production labor costs, improving equipment automation operation, and meeting the requirements of electric furnace economic indicators. The smoke sealing mechanism can reduce smoke leakage of the submerged arc furnace and improve the operation rate of the submerged arc furnace.

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

Claims

1. An automatic charging device for a semi-closed submerged arc furnace, characterized in that: It includes a silo, a material pipe, a feeder, a chute rotating mechanism, a chute tilting mechanism and a chute, wherein the silo is connected with the feeder through the material pipe, and the feeder is connected with the chute through a throat pipe; The throat is connected to the chute rotating mechanism through a rotating sleeve, the chute rotating mechanism is connected to the upper end of the chute to drive the chute to rotate horizontally, and the chute tilting mechanism is connected to the upper end of the chute to drive the chute to tilt vertically; A swivel joint is provided on the outer side of the upper end of the chute, one end of the swivel joint is rotatably connected to the swivel sleeve, and the other end of the swivel joint is fixedly connected to the chute; the swivel joint is an internal pressure water seal swivel joint, including a gland, a clamping member, a hollow shaft and a shell, the end of the shell is open, the first end of the swivel sleeve is inserted in the open, and the second end is sealed with the shell, the outer diameter of the first end of the swivel sleeve is smaller than the inner diameter of the shell; the first end of the hollow shaft is inserted in the swivel sleeve, and the second end protrudes from the swivel sleeve, and the hollow shaft A first sealing ring is provided between the first end of and the rotating sleeve, and a bearing is provided between the middle part of the hollow shaft and the rotating sleeve; one end of the gland is abutted against the first sealing ring, and the other end is provided with a locking piece, and the pressing piece is used to cooperate with the locking piece to connect so that the gland is pressed against the first sealing ring, and a second sealing ring is provided between the gland and the rotating sleeve; a gap is provided between the first end of the hollow shaft and the rotating sleeve and the top end of the shell to form a cavity, and a water outlet hole connected with the cavity is opened on the side wall of the shell; A smoke sealing mechanism is provided at the connection between the throat and the chute, and the smoke sealing mechanism is installed on the rotating sleeve to reduce smoke leakage of the submerged arc furnace; The chute rotating mechanism includes a fixed support plate and a slewing support plate which are sleeved on the lower end of the throat pipe, a reducer is provided on the fixed support plate, a driving end of the reducer drives the slewing support plate to rotate, and the upper end of the chute is connected to the bottom side of the slewing support plate; the chute tilting mechanism includes a hydraulic cylinder which is fixed on the slewing support plate, and a driving end of the hydraulic cylinder is connected to the chute through a lever pendulum.

2. The automatic charging device for a semi-closed submerged arc furnace according to claim 1, characterized in that: The driving end of the reducer is provided with a driving wheel, and the rotary support plate is provided with gear teeth meshing with the driving wheel.

3. The automatic charging device for a semi-closed submerged arc furnace according to claim 1, characterized in that: The slewing support plate is welded to the rotating sleeve, the upper end of the chute passes through the central through hole of the slewing support plate, and one side of the upper end of the chute is hinged to the rotating sleeve through a fixing pin.

4. The automatic charging device for a semi-closed submerged arc furnace according to claim 3, characterized in that: The other side of the upper end of the chute is hinged to the chute tilting mechanism, and the chute tilting mechanism is arranged on the slewing support plate.

5. The automatic charging device for a semi-closed submerged arc furnace according to claim 1, characterized in that: The lever pendulum includes a rotary lever, one end of which is slidably disposed in a first slide groove and connected to the driving end of the hydraulic cylinder, and the other end of the rotary lever is slidably disposed in a second slide groove and connected to the chute through an output lever.

6. The automatic charging device for a semi-closed submerged arc furnace according to claim 5, characterized in that: The slewing lever is horizontally arranged on the slewing support plate through a slewing lever support member, and the middle part of the slewing lever is rotatably pin-connected with the slewing lever support member through a pin shaft.

7. The automatic charging device for a semi-closed submerged arc furnace according to claim 5, characterized in that: The first sliding groove and the second sliding groove are vertically arranged on the slewing support plate along the driving direction of the driving shaft of the hydraulic cylinder.

8. The automatic charging device for a semi-closed submerged arc furnace according to claim 1, characterized in that: The throat pipe and the outer side of the chute are both provided with water cooling pipelines.

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