A method of peripheral feeding of a dc furnace

Abstract

This invention discloses a method for peripheral feeding of a DC furnace, including a furnace cover, a diversion assembly, a peripheral feeding pipe, and a feeder. The diversion assembly is located directly above the furnace cover and is used to divert titanium concentrate raw materials into the DC furnace. It includes a fine-flow feed pipe, a feed cylinder, and a first flange. The peripheral feeding pipe includes a second flange, an air inlet hopper, and an air supply assembly. The feeder includes a front side plate, an impeller, a rear side plate, and three discharge pipes. Each discharge pipe is fitted with a control valve, and the discharge pipes are interconnected with the left horizontal end of the peripheral feeding pipe through the control valves. Through the diversion assembly, the titanium concentrate raw materials enter the fine-flow feed pipe and first remain in the feed cylinder. An ultrasonic generator installed in the feed cylinder ultrasonically reacts with the titanium concentrate raw materials to reduce large particles. The titanium concentrate raw materials are then diverted through the fine-flow feed pipe into several feed pipes on the furnace cover and finally enter the furnace.

Description

Technical Field

[0001] This invention belongs to the field of titanium slag smelting technology, specifically a method for feeding materials from the periphery of a DC furnace. Background Technology

[0002] DC furnaces, also known as direct current furnaces, are used in the smelting of titanium slag. They have lower electrode consumption per unit, better melting heat efficiency, and lower noise.

[0003] Patent CN202022620300.3 discloses a DC closed electric furnace titanium slag feeding device. It solves the problem in existing technologies where peripheral feeding holes cause thicker slag buildup on the furnace wall, a smaller molten pool diameter, and a tendency for material collapse during furnace operation. This invention includes a furnace top center component installed on the top of the electric furnace. The center component has a central hole, and several peripheral feeding holes are evenly arranged around the central hole. A hollow electrode is installed in the central hole, and peripheral feeding pipes are installed in the peripheral feeding holes. This device positions the material far from the furnace wall, preventing the titanium slag from adhering to the furnace wall after entering the furnace, thus preventing thicker slag buildup and a smaller molten pool diameter. It also effectively covers the electric arc, reducing arc heat radiation, and increases the effective power of the electric furnace when using peripheral feeding. Patent CN201220522614.2 discloses a peripheral feeding and distribution device for a DC electric arc furnace for titanium slag smelting. The distribution mechanism is arranged from top to bottom as follows: a collector, a feeding cup with an adjusting handle, a circular distribution cone, and at least one feeding port distributed in a ring on the circular distribution cone. This device has the advantages of simple structure, reliable use, and the ability to evenly distribute the conveyed material to several feeding points.

[0004] Since the titanium concentrate raw material is dried and then transported to the buffer silo via a high-angle belt, the buffer silo discharge valve is opened according to the material balance requirements of the DC furnace high titanium slag smelting or the need for emergency plugging. Therefore, we propose a method of feeding material from the outside of the DC furnace, so that the material falls to the corresponding positions of the furnace cover of the two slag outlets and two iron outlets, thereby achieving the purpose of material balance or emergency plugging.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide a method for feeding material from the periphery of a DC furnace, so as to solve the above-mentioned problems in the prior art.

[0007] To achieve the above objectives, one of the objectives of this invention is to provide a DC furnace peripheral feeding device, including a furnace cover, a flow distribution assembly, a peripheral feeding pipe, and a feeder;

[0008] The diversion assembly is located directly above the furnace cover and is used to divert titanium concentrate raw materials into the DC furnace. It includes three thin flow pipes arranged side by side. The thin flow pipes are arranged in a herringbone structure, and a material cylinder is provided at the top vertical end of the pipe. A first flange is provided at the top of the material cylinder.

[0009] The number of peripheral feed pipes is equal to the number of fine flow pipes and is located at the upper left of the diversion component. It is used to transport titanium concentrate raw materials. The peripheral feed pipe is set in an L-shaped structure, including a second flange at its bottom end, an air inlet hopper at the top of the water on its right side, and an air supply component at the bend of its pipe body. The air inlet hopper is located inside the air supply component.

[0010] The feeder is located at the left horizontal end of the peripheral feed pipe and is used for feeding titanium concentrate raw materials and diverting titanium concentrate raw materials into the peripheral feed pipe. The feeder has a cylindrical structure and includes a front side plate covering its front end, an impeller rotatably connected inside it, a rear side plate covering its rear end, and three discharge pipes located at its lower right end. Each discharge pipe is fitted with a control valve, and the discharge pipes are interconnected with the left horizontal end of the peripheral feed pipe through the control valves.

[0011] In the technical solution of the present invention, the top of the furnace cover is provided with a plurality of feed pipes corresponding one-to-one with the position of the fine flow material pipe inlet, and the two vertical end pipes at the top of the fine flow material pipe are respectively sleeved and fitted with the feed pipe.

[0012] In the technical solution of the present invention, an ultrasonic generator is inserted and fixed at the left end of the material cylinder, a gate valve is provided at the right end of the material cylinder, and the first flange is fixedly connected to the second flange by bolts.

[0013] In the technical solution of the present invention, the air supply assembly is provided with three air outlet chambers arranged side by side, the horizontal end of the outer feed pipe extends into the air outlet chamber, the vertical end of the outer feed pipe extends out from the bottom of the air outlet chamber, the top of the air supply assembly is provided with an air inlet, and the air inlet is connected to each of the air outlet chambers respectively.

[0014] In the technical solution of the present invention, a fan is provided on the top of the air supply component, and the fan generates air force to blow into each air inlet hopper, thereby accelerating the flow speed of titanium concentrate raw material in the peripheral feed pipe.

[0015] In the technical solution of the present invention, a first hinge plate is provided on the right side of the outer wall of the front side plate, and a second hinge plate is hinged to the first hinge plate, and the end of the second hinge plate is fixed to the right side wall of the feeder.

[0016] In the technical solution of the present invention, the bottom of the feeder is provided with a collection bin, and the top center of the feeder is provided with a feeding port for feeding titanium concentrate raw materials. The outer wall of the collection bin is connected to the three discharge pipes respectively.

[0017] In the technical solution of the present invention, the front end of the impeller is coaxially connected to a first rotating shaft, the first rotating shaft is rotatably connected to the center of the inner wall of the front side plate, the outer wall of the rear side plate is provided with a drive motor, the output shaft of the drive motor is coaxially connected to a second rotating shaft, the front end of the second rotating shaft passes through the center of the rear side plate and is rotatably connected to the rear end of the impeller.

[0018] The second objective of this invention is to provide a method for peripheral feeding of a DC furnace, the method comprising the aforementioned peripheral feeding equipment for a DC furnace, and including the following steps:

[0019] S1: First, put the dried titanium concentrate raw material into the feeding port and let it fall into the collection bin. At the same time, start the drive motor to drive the first rotating shaft to drive the impeller to rotate, and guide the concentrate raw material falling into the collection bin into the three discharge pipes. Open the control valve in advance, and the titanium concentrate raw material is transported to the outer feed pipe.

[0020] S2: Secondly, after the titanium concentrate raw material passes through the horizontal end of the outer feed pipe on the right, the blower is turned on to work. The blower transmits air force into the air inlet hopper, which accelerates the flow speed of the titanium concentrate raw material at the vertical end of the outer feed pipe and prevents the titanium concentrate raw material from being blocked. Finally, the titanium concentrate raw material is sent to the diversion component.

[0021] S3: Next, the titanium concentrate raw material enters the thin flow pipe, first passes through the material cylinder, and is ultrasonically treated by the ultrasonic generator to refine the large particles in the titanium concentrate raw material, which is conducive to the diversion of the titanium concentrate raw material. The diversion flow rate of the titanium concentrate raw material can be adjusted by the set gate valve.

[0022] S4: Finally, the refined titanium concentrate raw material is diverted through each fine stream pipe to several feed pipes at the top of the furnace cover, and finally fed into the DC furnace. When the DC furnace finishes feeding, the titanium concentrate raw material is stopped from entering the fine stream pipe by closing the gate valve.

[0023] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0024] 1. In this invention, the titanium concentrate raw material is diverted through the diversion component so that after entering the fine flow pipe, it first stays in the barrel. The titanium concentrate raw material is ultrasonically treated by the ultrasonic generator installed in the barrel to reduce the large particles in the titanium concentrate raw material. The titanium concentrate raw material is then diverted through the fine flow pipe to several feed pipes on the furnace cover and finally enters the furnace.

[0025] 2. In this invention, the titanium concentrate raw material is introduced into the peripheral feed pipe through the feeder via the peripheral feed pipe and the feeder, so that the titanium concentrate raw material can be transported to the diversion component through the peripheral feed pipe. An air supply component is provided on the peripheral feed pipe to speed up the flow rate of the titanium concentrate raw material and prevent the titanium concentrate raw material from being blocked in the peripheral feed pipe. Attached Figure Description

[0026] Figure 1 This is a simplified schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a structural diagram of the shunt component in this invention;

[0028] Figure 3 This is a structural diagram of the peripheral feed pipe in this invention;

[0029] Figure 4 This is a structural diagram of the air supply component and fan in this invention;

[0030] Figure 5 This is one of the structural diagrams of the feeder in this invention;

[0031] Figure 6 This is the second structural diagram of the feeder in this invention;

[0032] Figure 7 This is a structural diagram of the furnace cover in this invention.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Furnace lid; 10. Feed pipe; 11. Fastening block;

[0035] 2. Diverter assembly; 20. Thin flow pipe; 21. Material cylinder; 210. First flange; 211. Ultrasonic generator; 212. Gate valve;

[0036] 3. External feed pipe; 30. Second flange; 31. Air inlet hopper; 32. Air supply assembly; 320. Air outlet chamber; 321. Air inlet duct; 33. Fan;

[0037] 4. Feeder; 40. Front side plate; 401. First hinge plate; 402. Second hinge plate; 403. Collection bin; 41. Impeller; 410. First rotating shaft; 42. Rear side plate; 420. Drive motor; 421. Second rotating shaft; 43. Discharge pipe; 430. Control valve; 44. Feed port. Detailed Implementation

[0038] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0039] Unless otherwise expressly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "comprising" shall be understood to include the stated elements or components without excluding other elements or other components.

[0040] Reference Figures 1-7 A method for peripheral feeding of a DC furnace includes a peripheral feeding device comprising a furnace cover 1, a diversion assembly 2, peripheral feeding pipes 3, and a feeder 4. The furnace cover 1 has a fastening block 11 at its right end for connecting to the furnace body. The diversion assembly 2 is located directly above the furnace cover 1 and is used to divert titanium concentrate raw materials into the DC furnace. It includes three parallel fine flow pipes 20, each with a herringbone structure. Each fine flow pipe 20 has a vertically positioned feed cylinder 21 at its top, the size of which is not limited and can be customized according to production requirements. Customization is required. The feed cylinder 21 can temporarily store titanium concentrate raw materials. The top of the feed cylinder 21 is equipped with a first flange 210. The number of peripheral feed pipes 3 is equal to the number of fine flow pipes 20 and is located to the upper left of the diversion assembly 2. These peripheral feed pipes 3 are used to transport titanium concentrate raw materials. The peripheral feed pipes 3 have an L-shaped structure, including a second flange 30 at their bottom end, an air inlet hopper 31 at the top right side, and an air supply assembly 32 at the bend in the pipe body. The air supply assembly 32 is installed on the three peripheral feed pipes 3. Additionally, in the feeding... A support frame and a shock absorber are added to the bottom of the air supply assembly 32 to ensure its load-bearing capacity and the vibration generated by the fan 33. The air inlet hopper 31 is set inside the air supply assembly 32, so that the air generated by the fan 33 is blown from the air supply assembly 32 into the air inlet hopper 31. The feeder 4 is set at the left horizontal end of the outer feed pipe 3 for feeding titanium concentrate raw materials and diverting titanium concentrate raw materials into the outer feed pipe 3. The feeder 4 has a cylindrical structure and includes a front side plate 40 covered at its front end and a rotatably connected to... The device has an internal impeller 41, a rear side plate 42 covering its rear end, and three discharge pipes 43 located at its lower right end. Each discharge pipe 43 is fitted with a control valve 430. The discharge pipes 43 are connected to the left horizontal end of the external feed pipe 3 through the control valves 430. The feeder 4 is supported by four legs. The impeller 41 inside the device evenly guides the titanium concentrate raw material into the three discharge pipes 43. The discharge rate of the titanium concentrate raw material is adjusted by the control valves 430 set on the discharge pipes 43.

[0041] First, the top of the furnace cover 1 is provided with several feed pipes 10 that correspond one-to-one with the positions of the inlets of the fine flow feed pipes 20. The two vertical ends of the top of the fine flow feed pipes 20 are respectively connected to the feed pipes 10. Through the fine flow feed pipes 20, the titanium concentrate raw material is diverted to each feed pipe 10.

[0042] Specifically, an ultrasonic generator 211 is inserted and fixed at the left end of the material cylinder 21, and a gate valve 212 is provided at the right end of the material cylinder 21. The first flange 210 is fixedly connected to the second flange 30 by bolts. The gate valve 212 is used to adjust the amount of titanium concentrate raw material in the thin flow pipe 20 or to stop feeding into the DC furnace.

[0043] Furthermore, the air supply assembly 32 is provided with three air outlet chambers 320 arranged side by side. The horizontal end of the outer feed pipe 3 extends into the air outlet chamber 320, and the vertical end of the outer feed pipe 3 extends out from the bottom of the air outlet chamber 320. The top of the air supply assembly 32 is provided with an air inlet duct 321, which is connected to each air outlet chamber 320. The air outlet chambers 320 separate the air inlet ducts 321, allowing air to enter each air outlet chamber 320 and finally blow into the air inlet hopper 31.

[0044] In addition, a fan 33 is installed on the top of the air supply assembly 32 to accelerate the flow speed of titanium concentrate raw material in the outer feed pipe 3. The fan 33 is connected to the power supply through a wire. The fan 33 generates air force, which blows the generated air force into each air inlet hopper 31.

[0045] In this invention, a first hinge plate 401 is provided on the right side of the outer wall of the front side plate 40, and a second hinge plate 402 is hinged on the first hinge plate 401. The end of the second hinge plate 402 is fixed to the right side wall of the feeder 4. The first hinge plate 401 and the second hinge plate 402 provide support for the front side plate 40 and the impeller 41, making it easy to open the front side plate 40 and take out the impeller 41, which facilitates the disassembly, assembly and maintenance of the impeller 41.

[0046] Specifically, the bottom of the feeder 4 is provided with a collection bin 403, and the top center of the feeder 4 is provided with a feeding port 44 for feeding titanium concentrate raw materials. The outer wall of the collection bin 403 is connected to three discharge pipes 43 respectively. Through the impeller 41, the titanium concentrate raw materials in the collection bin 403 are scraped out and introduced into each discharge pipe 43.

[0047] Finally, a first rotating shaft 410 is coaxially connected to the front end of the impeller 41. The first rotating shaft 410 is rotatably connected to the center of the inner wall of the front side plate 40. A drive motor 420 is provided on the outer wall of the rear side plate 42. A second rotating shaft 421 is coaxially connected to the output shaft of the drive motor 420. The front end of the second rotating shaft 421 passes through the center of the rear side plate 42 and is rotatably connected to the rear end of the impeller 41. The drive motor 420 is connected to the power supply through wires. The impeller 41 is driven to work by driving the drive motor 420 to rotate. The rear side plate 42 provides support and limit for the impeller 41.

[0048] The method for feeding material around the DC furnace according to the present invention includes the following steps:

[0049] S1: First, put the dried titanium concentrate raw material into the feed port 44 and let it fall into the collection bin 403. At the same time, start the drive motor 420 to drive the first rotating shaft 410 to drive the impeller 41 to rotate, and guide the concentrate raw material falling into the collection bin 403 into the three discharge pipes 43. Open the control valve 430 in advance, and the titanium concentrate raw material is transported to the outer feed pipe 3.

[0050] S2: Secondly, after the titanium concentrate raw material passes through the horizontal end of the outer feed pipe 3, the blower 33 is turned on to work. The blower 33 transmits air force into the air inlet hopper 31, which speeds up the flow of the titanium concentrate raw material at the vertical end of the outer feed pipe 3, prevents the titanium concentrate raw material from being blocked, and finally the titanium concentrate raw material is sent to the diversion component 2.

[0051] S3: Next, the titanium concentrate raw material enters the fine flow pipe 20, first passes through the material cylinder 21, and is ultrasonically treated by the ultrasonic generator 211 to refine the large particles in the titanium concentrate raw material, which is conducive to the diversion of the titanium concentrate raw material. The diversion flow rate of the titanium concentrate raw material can be adjusted by the gate valve 212.

[0052] S4: Finally, the refined titanium concentrate raw material is diverted through each fine flow pipe 20 to several feed pipes 10 at the top of the furnace cover 1, and finally fed into the DC furnace. When the DC furnace feeding is completed, the titanium concentrate raw material is stopped from entering the fine flow pipe 20 by closing the gate valve 212.

[0053] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. A device for peripheral feeding of a DC furnace, comprising a DC furnace peripheral feeding equipment, the equipment including a furnace cover (1), a diversion assembly (2), a peripheral feeding pipe (3), and a feeder (4), characterized in that: The diversion assembly (2) is located directly above the furnace cover (1) and is used to divert titanium concentrate raw materials into the DC furnace. It includes three fine flow pipes (20) arranged side by side. The fine flow pipes (20) are arranged in a herringbone structure. A material cylinder (21) is provided at the top vertical end of the pipe. A first flange (210) is provided at the top of the material cylinder (21). The number of peripheral feed pipes (3) is equal to the number of fine flow pipes (20) and is located on the upper left of the diversion component (2) for conveying titanium concentrate raw materials. The peripheral feed pipes (3) are arranged in an L-shaped structure, including a second flange (30) at its bottom end, an air inlet hopper (31) at its right top and an air supply component (32) at the bend of its pipe body. The air inlet hopper (31) is located inside the air supply component (32). The feeder (4) is located at the left horizontal end of the peripheral feed pipe (3) and is used for feeding titanium concentrate raw materials and diverting titanium concentrate raw materials into the peripheral feed pipe (3). The feeder (4) is arranged in a cylindrical structure. The feeder (4) includes a front side plate (40) covering its front end, an impeller (41) rotatably connected inside it, a rear side plate (42) covering its rear end, and three discharge pipes (43) located at its lower right end. Each discharge pipe (43) is fitted with a control valve (430). The discharge pipes (43) are connected to the left horizontal end of the peripheral feed pipe (3) through the control valves (430). The top of the furnace cover (1) is provided with several feed pipes (10) that correspond one-to-one with the positions of the inlets of the fine flow pipe (20). The vertical end of the fine flow pipe (20) at the bottom is sleeved with the feed pipe (10). An ultrasonic generator (211) is inserted and fixed at the left end of the material cylinder (21), and a gate valve (212) is provided at the right end of the material cylinder (21). The first flange (210) is fixedly connected to the second flange (30) by bolts. The air supply assembly (32) is provided with three air outlet chambers (320) arranged side by side. The horizontal end of the outer feed pipe (3) extends into the air outlet chamber (320), and the vertical end of the outer feed pipe (3) extends out from the bottom of the air outlet chamber (320). The top of the air supply assembly (32) is provided with an air inlet duct (321), and the air inlet duct (321) is connected to each of the air outlet chambers (320). The top of the air supply assembly (32) is provided with a fan (33), which generates airflow and blows it into each air inlet hopper (31) to accelerate the flow rate of titanium concentrate raw material in the peripheral feed pipe (3); The feeder (4) has a collection bin (403) at the bottom and a feeding port (44) for feeding titanium concentrate raw materials at the top center of the feeder (4). The outer wall of the collection bin (403) is connected to the three discharge pipes (43) respectively. The front end of the impeller (41) is coaxially connected to a first rotating shaft (410), which is rotatably connected to the center of the inner wall of the front side plate (40). The outer wall of the rear side plate (42) is provided with a drive motor (420), and the output shaft of the drive motor (420) is coaxially connected to a second rotating shaft (421). The front end of the second rotating shaft (421) passes through the center of the rear side plate (42) and is rotatably connected to the rear end of the impeller (41).

2. The device for peripheral feeding of a DC furnace as described in claim 1, characterized in that: The right side of the outer wall of the front side plate (40) is provided with a first hinge plate (401), and a second hinge plate (402) is hinged on the first hinge plate (401). The end of the second hinge plate (402) is fixed to the right side wall of the feeder (4).

3. The feeding method of the DC furnace peripheral feeding device as described in claim 1, characterized in that: Includes the following steps: S1: First, put the dried titanium concentrate raw material into the feed port (44) and let it fall into the collection bin (403). At the same time, start the drive motor (420) to drive the first rotating shaft (410) to drive the impeller (41) to rotate, and guide the titanium concentrate raw material that fell into the collection bin (403) into the three discharge pipes (43). Open the control valve (430) in advance, and the titanium concentrate raw material is transported to the outer feed pipe (3). S2: Secondly, after the titanium concentrate raw material passes through the horizontal end of the outer feed pipe (3), the blower (33) is turned on to work. The blower (33) transmits air force into the air inlet hopper (31), which speeds up the flow of the titanium concentrate raw material at the vertical end of the outer feed pipe (3) and prevents the titanium concentrate raw material from being blocked. Finally, the titanium concentrate raw material is sent to the diversion component (2). S3: Again, the titanium concentrate raw material enters the fine flow pipe (20), first passes through the material cylinder (21), and is ultrasonically treated by the ultrasonic generator (211) to refine the large particles in the titanium concentrate raw material, which is beneficial to the diversion of the titanium concentrate raw material. The diversion flow rate of the titanium concentrate raw material can be adjusted by the gate valve (212). S4: Finally, the refined titanium concentrate raw material is diverted through each fine flow pipe (20) to several feed pipes (10) at the top of the furnace cover (1) and finally fed into the DC furnace. When the DC furnace feeding is completed, the titanium concentrate raw material is stopped from entering the fine flow pipe (20) by closing the gate valve (212).

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