Submerged arc furnace for ferrochrome production

Abstract

The utility model discloses a submerged arc furnace for ferrochrome production, which comprises a furnace body and a motor, a return pipe is arranged between the top end and the side wall of the furnace body in a penetrating manner, and a rotary filter component is arranged on the return pipe. By arranging a smoke suction pipe, a motor, a screw rod, a movable sealing cover and a second draft fan, when the feeding port is filled with materials, the feeding port can be rapidly opened or closed, smoke at the feeding port of the second draft fan is sucked when the feeding port is opened, the smoke suction pipe is matched with a filtering assembly for filtering, heat loss is greatly reduced, and meanwhile the energy consumption is reduced. The time for flue gas to blow out from the feeding hole is reduced; and by arranging the filtering assembly and the rotating shell which is rotationally arranged, the interior of the device is separated from the backflow pipe, the activated carbon plate and the filter element layer can be rapidly taken out from the placing ring to be replaced, and the processing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ore-fired furnaces for soldering iron production, in particular to an ore-fired furnace for ferrochrome production. Background Art

[0002] Ferrochrome is an iron alloy composed of chromium and iron. It is an important alloying additive for steelmaking. Ferrochrome is divided into high carbon ferrochrome, medium carbon ferrochrome, low carbon ferrochrome, micro carbon ferrochrome, silicon chromium alloy, nitride ferrochrome, etc. according to different carbon contents; ferrochrome with chromium and iron as the main components is one of the main alloying agents used in the steel industry. In addition to the main components of chromium and iron, it also contains impurities such as carbon, silicon, sulfur, and phosphorus.

[0003] In the related technology, such as the Chinese patent with application number: "202123315607.3", its name is: "A mineral arc furnace for the production of ferrochrome alloy", which includes a furnace body, a smoke outlet pipe connected to the inside of the furnace body is installed on the top of the furnace body, and a heat recovery pipe connected to the inside of the furnace body is installed on the side wall of the furnace body, and the other end of the heat recovery pipe extends to the top of the smoke outlet pipe; a stepper motor is installed on the top of the furnace body, and a driving rod is connected to the output end of the stepper motor, and a connecting sleeve is fixed on the outer side of the driving rod, and an extension rod A is fixed on the outer side of the connecting sleeve, and a sleeve is fixed on the other end of the extension rod A, and an external thread is provided on the outer side of the sleeve, and an upper connecting ring is threadedly connected to the upper end of the sleeve, and a lower connecting ring is threadedly connected to the lower end of the sleeve, and the ends of the smoke outlet pipe and the heat recovery pipe away from the furnace body are correspondingly provided with external threads, and a cleaning part is arranged in the sleeve; on the premise of ensuring that the flue gas generated during the operation of the furnace body does not pollute the external environment, the heat flow contained in the flue gas is recycled and utilized, thereby effectively improving the smelting efficiency.

[0004] Although the above patent can recycle heat flow, when the raw materials are put into the furnace body, the feed port remains open, which will cause heat flow loss, and the flue gas in the furnace body will also float out through the feed port to pollute the environment. In addition, it is difficult to replace the filter component, affecting the processing efficiency. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, one of the purposes of the utility model is to provide a ferrochrome alloy production electric furnace, which can quickly open or close the feed port when filling the feed port by means of a smoking pipe, a motor, a screw, a movable cover and two exhaust fans. When open, the smoke at the feed port is extracted by the two exhaust fans and filtered through the smoking pipe and a filter assembly, which greatly reduces the heat loss and reduces the time for the smoke to float out of the feed port. By means of the filter assembly, the rotating shell is rotated to separate the interior of the shell from the reflux pipe, and the activated carbon plate and the filter element layer can be quickly removed from the placement ring and replaced, thereby improving the processing efficiency.

[0006] One of the purposes of the utility model is achieved by the following technical scheme: a mineral arc furnace for producing ferrochrome alloy, comprising: a furnace body, a motor, a return pipe is provided between the top and the side wall of the furnace body, a rotating filter assembly is provided on the return pipe, an exhaust fan 1 is installed below the filter assembly, a feed inlet is provided on the side wall of the furnace body, a shell is provided above the feed inlet, a smoking pipe is connected to the top of the shell, an exhaust fan 2 is installed on the smoking pipe, the other end of the smoking pipe is connected to the return pipe, a slide groove is provided on the inner wall of the feed inlet, a movable cover is slidably connected to the inner wall of the slide groove, a displacement block is provided on the movable cover, the outer wall of the displacement block passes through the outer wall of the furnace body and is spirally connected to a screw, and the top of the screw is fixedly connected to the output end of the motor. By means of the smoking pipe, motor, screw, movable sealing cover and exhaust fan 2, the feed port can be quickly opened or closed when filling the feed port. When opened, the exhaust fan 2 can extract the smoke at the feed port, and filter it through the smoking pipe and the filter component, which greatly reduces the heat loss and the time for the smoke to float out of the feed port. By means of the filter component, the rotating shell is rotated to separate the interior from the reflux pipe, and the activated carbon plate and the filter element layer can be quickly removed from the placement ring and replaced, thereby improving the processing efficiency.

[0007] According to the ore-fired furnace for producing ferrochrome alloy, the filter assembly includes a rotating shell, the inner wall of the rotating shell is fixedly connected to two placement rings, the two placement rings are sequentially placed with filter core layers and activated carbon plates from top to bottom, and the outer wall of the rotating shell is provided with a push plate.

[0008] According to the ferrochrome alloy production submerged arc furnace, the side wall of the motor is fixedly connected to the outer wall of the furnace body.

[0009] A submerged arc furnace for producing ferrochrome alloy is provided, wherein the outer wall of the furnace body is provided with slots for cooperating with the displacement block to move up and down.

[0010] According to the ore-fired furnace for producing ferrochrome alloy, the through-connection between the smoke pipe and the return pipe is located below the exhaust fan.

[0011] According to the ferrochrome alloy production submerged arc furnace, the outer wall of the shell is fixedly connected to the outer wall of the furnace body.

[0012] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0014] Figure 1This is a three-dimensional diagram of a submerged arc furnace for producing ferrochrome alloy according to the utility model;

[0015] Figure 2 It is a partial cross-sectional view of a submerged arc furnace for producing ferrochrome alloy according to the utility model;

[0016] Figure 3 It is a partial cross-sectional view of a submerged arc furnace for producing ferrochrome alloy according to the utility model;

[0017] Figure 4 This is an enlarged view of point A of a ferrochrome alloy production submerged arc furnace according to the utility model.

[0018] Legend:

[0019] 1. Furnace body; 2. Reflux pipe; 3. Shell; 4. Smoke pipe; 5. Motor; 6. Screw; 7. Moving cover; 8. Filter assembly; 9. Exhaust fan 1; 10. Exhaust fan 2; 101. Feed inlet; 102. Slot hole; 103. Slide; 701. Displacement block; 801. Rotating shell; 802. Placement ring; 803. Filter element layer; 804. Activated carbon plate; 805. Push plate. DETAILED DESCRIPTION

[0020] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0021] Reference Figure 1-4 The utility model embodiment is a ferrochrome alloy production ore furnace, which includes: a furnace body 1, a motor 5, a reflux pipe 2 is provided between the top and the side wall of the furnace body 1, a rotating filter assembly 8 is provided on the reflux pipe 2, and an exhaust fan 9 is installed below the filter assembly 8. A feed inlet 101 is provided on the side wall of the furnace body 1, and a shell 3 is provided above the feed inlet 101. The outer wall of the shell 3 is fixedly connected to the outer wall of the furnace body 1, and a smoking pipe 4 is connected to the top of the shell 3. The smoking pipe 4 is installed with an exhaust fan 10, and the other end of the smoking pipe 4 is connected to the The reflux pipe 2 is connected through, and the through connection between the smoking pipe 4 and the reflux pipe 2 is located below the exhaust fan 9. The inner wall of the feed port 101 is provided with a slide groove 103, and the inner wall of the slide groove 103 is slidably connected with a movable cover 7, and a displacement block 701 is provided on the movable cover 7. The outer wall of the furnace body 1 is provided with a slot 102 for cooperating with the displacement block 701 to move up and down. The outer wall of the displacement block 701 passes through the outer wall of the furnace body 1 and is spirally connected with a screw 6. The top end of the screw 6 is fixedly connected to the output end of the motor 5, and the side wall of the motor 5 is fixedly connected to the outer wall of the furnace body 1.

[0022] The filter assembly 8 includes a rotating shell 801 , the inner wall of which is fixedly connected to two placement rings 802 , on which filter core layers 803 and activated carbon plates 804 are placed in sequence from top to bottom, and a push plate 805 is provided on the outer wall of the rotating shell 801 . By means of the smoking pipe 4, motor 5, screw 6, movable cover 7 and exhaust fan 10, the motor 5 drives the screw 6 to rotate, thereby driving the movable cover 7 to move up and down in the slide groove 103 of the furnace body 1, so that when the feed port 101 is filled, the feed port 101 can be quickly opened or closed. When opened, the exhaust fan 10 extracts the smoke at the feed port 101, and filters it through the smoking pipe 4 in cooperation with the filter component 8, which greatly reduces the heat loss and reduces the time for the smoke to float out of the feed port 101; by means of the filter component 8, the rotating shell 801 is rotated to separate its interior from the reflux pipe 2, so that the activated carbon plate 804 and the filter element layer 803 can be quickly removed from the placement ring 802 for replacement, thereby improving the processing efficiency.

[0023] Working principle: When in use, the motor 5 is started to drive the screw 6 to rotate, and the movable cover 7 is driven to move up and down in the slide groove 103 of the furnace body 1, so that when the feed port 101 is filled, the feed port 101 can be quickly opened or closed. When the feed port 101 is open, the filling is carried out, and after the filling, the movable cover 7 is closed to close the feed port 101. When it is open, the exhaust fan 10 extracts the smoke at the feed port 101, and filters it through the smoke pipe 4 and the filter assembly 8, which greatly reduces the loss of heat and reduces the smoke from the feed port. When the material port 101 floats out, the smoke and the smoke in the smoking pipe 4 are extracted by the exhaust fan 9 when the furnace body 1 is working, and the extracted smoke is filtered by the activated carbon plate 804 and the filter element layer 803, and the filtered smoke returns to the furnace body 1 through the reflux pipe 2. When the activated carbon plate 804 and the filter element layer 803 need to be replaced, the rotating shell 801 is rotated by the push plate 805 to separate the interior of the reflux pipe 2, and the activated carbon plate 804 and the filter element layer 803 can be quickly removed from the placement ring 802 for replacement, thereby improving the processing efficiency.

[0024] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A submerged arc furnace for producing ferrochrome alloy, comprising: A furnace body (1) and a motor (5), characterized in that a return pipe (2) is provided between the top and the side wall of the furnace body (1), a rotating filter assembly (8) is provided on the return pipe (2), an exhaust fan (9) is installed below the filter assembly (8), a feed inlet (101) is provided on the side wall of the furnace body (1), a shell (3) is provided above the feed inlet (101), a smoking pipe (4) is connected to the top of the shell (3), and the smoking pipe (4) is provided at the bottom of the shell (3). An exhaust fan (10) is installed, the other end of the smoking pipe (4) is connected to the return pipe (2), the inner wall of the feed port (101) is provided with a slide groove (103), the inner wall of the slide groove (103) is slidably connected to a movable cover (7), a displacement block (701) is provided on the movable cover (7), the outer wall of the displacement block (701) passes through the outer wall of the furnace body (1) and is spirally connected to a screw rod (6), and the top end of the screw rod (6) is fixedly connected to the output end of the motor (5).

2. A ferrochrome alloy production submerged arc furnace according to claim 1, characterized in that: The filter assembly (8) comprises a rotating shell (801), the inner wall of the rotating shell (801) being fixedly connected to two placement rings (802), the two placement rings (802) being sequentially placed with filter core layers (803) and activated carbon plates (804) from top to bottom, and the outer wall of the rotating shell (801) being provided with a push plate (805).

3. A ferrochrome alloy production submerged arc furnace according to claim 2, characterized in that: The side wall of the motor (5) is fixedly connected to the outer wall of the furnace body (1).

4. A ferrochrome alloy production submerged arc furnace according to claim 3, characterized in that: The outer wall of the furnace body (1) is provided with a slot hole (102) for cooperating with the displacement block (701) to move up and down.

5. The ferrochrome alloy production submerged arc furnace according to claim 4, characterized in that: The through connection between the smoke pipe (4) and the return pipe (2) is located below the exhaust fan 1 (9).

6. A ferrochrome alloy production submerged arc furnace according to claim 5, characterized in that: The outer wall of the shell (3) is fixedly connected to the outer wall of the furnace body (1).

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