Radio frequency linear plasma device and its application in smelting of vanadium titano-magnetite

Abstract

The application discloses a radio frequency linear plasma device and application thereof in vanadium-titanium magnetite smelting, and the device comprises an outer shell, a discharge chamber arranged in the outer shell, a neutralizer arranged at the top end of the outer shell, a radio frequency induction coil arranged in the outer shell and a heat exchange coil; the outer shell is provided with an air inlet joint and an air outlet joint; the bottom end of the discharge chamber is communicated with the air inlet joint, the top end of the discharge chamber is provided with a high-temperature-resistant pipe clamped with the air outlet joint, the neutralizer is communicated with the air outlet joint, the radio frequency induction coil is sleeved outside the discharge chamber, and the outer shell is provided with a radio frequency input joint connected with the radio frequency induction coil; the device has a reasonable structure design, adopts a ring-shaped radio frequency induction coil to replace a traditional induction electrode, can generate high-density plasma under a lower radio frequency voltage, greatly reduces energy consumption during device operation, and promotes efficient smelting of vanadium-titanium magnetite through the formed ring-shaped plasma, thereby obviously improving the content of titanium dioxide in smelted products, and thus has good market competitiveness.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal smelting, in particular to a radio frequency linear plasma device and its application in smelting of vanadium-titanium magnetite. BACKGROUND

[0002] Titanium-based materials are widely used in aerospace, chemical industry, ocean engineering, medical equipment and other fields due to their excellent strength-to-weight ratio, corrosion resistance, high temperature resistance and biocompatibility, becoming the key materials of many high-end equipment and technologies.

[0003] Traditional vanadium-titanium magnetite smelting technology has been gradually replaced by new technologies due to its high energy consumption, large exhaust emission and difficulty in separating impurities in finished products. For example, some researchers use plasma technology to smelt vanadium-titanium magnetite.

[0004] Plasma smelting technology is a new technology that utilizes the high temperature and high energy density characteristics of plasma to smelt. It can quickly decompose impurities in ore at extremely high temperatures, effectively improving the purity of metals, and has the advantages of lower energy consumption, higher reaction efficiency and smaller environmental impact. However, existing plasma smelting equipment cannot fundamentally improve the drawbacks caused by thermodynamic and kinetic limitations, resulting in high energy consumption and low product purity.

[0005] In the face of the above problems, some researchers have proposed combining radio frequency technology with plasma smelting technology. However, existing radio frequency linear plasma smelting devices use electrodes to generate arcs, and when the electrode material is consumed, it will combine with the molten metal to form an alloy, making it difficult to obtain high-purity metal products. At the same time, the consumption of electrode material will directly affect the service life of the device.

[0006] Therefore, the present application aims to design a radio frequency linear plasma device without electrodes and low energy consumption and its application in smelting of vanadium-titanium magnetite. SUMMARY

[0007] In view of the above technical problems, the present application provides a radio frequency linear plasma device and its application in smelting of vanadium-titanium magnetite.

[0008] The technical solution of the present application is: a radio frequency linear plasma device, comprising an outer shell, a discharge chamber movably arranged inside the outer shell, a neutralizer arranged at the top of the outer shell and communicating with the discharge chamber, a radio frequency induction coil arranged inside the outer shell and sleeved outside the discharge chamber, and a heat exchange coil wound on the inner wall of the outer shell.

[0009] The shell body comprises an outer cylinder, a top cover movably connected to the upper end of the outer cylinder, and a bottom cover movably connected to the lower end of the outer cylinder; a gas outlet joint is provided through the top cover; a limiting counterbore is provided on the upper end face of the bottom cover; a liquid inlet pipe and a liquid outlet pipe are provided on the outer side wall of the outer cylinder and are respectively in communication with two ports of the heat exchange coil;

[0010] A high-temperature-resistant pipe is movably connected to the top end of the discharge chamber and is movably connected to the gas outlet joint; a limiting seat is movably connected to the bottom end of the discharge chamber and is movably connected to the limiting counterbore; an air inlet joint is provided on the lower bottom face of the bottom cover and is in communication with the discharge chamber;

[0011] The neutralizer is in communication with the gas outlet joint, and an air outlet nozzle is provided on the neutralizer;

[0012] The radio frequency induction coil is provided on the upper end face of the bottom cover through a positioning sleeve; a conductive seat is provided on the inner side wall of the outer cylinder and is slidably connected to two wire ends of the radio frequency induction coil; a radio frequency input joint is provided on the outer side wall of the outer cylinder; a conductive top rod is movably connected to the inside of the radio frequency input joint, penetrates the outer cylinder, and abuts against the conductive seat; a damping spring is provided on the side of the conductive top rod away from the conductive seat and is in contact with the inner wall of the radio frequency input joint.

[0013] Further, an air inlet flow adjusting assembly is movably provided in the air inlet joint; the air inlet flow adjusting assembly comprises a plurality of air inlet baffles that are equidistantly distributed in the air inlet joint, a driving sleeve that is slidably connected to the air inlet joint, and an adjusting screw that is rotatably connected to the outer side wall of the air inlet joint and is threadedly connected to the driving sleeve; both ends of each air inlet baffle are provided with pinions that penetrate the air inlet joint; the lower bottom face of the driving sleeve is provided with a rack that is meshingly connected to each pinion; a threaded seat that penetrates the air inlet joint and is threadedly connected to the adjusting screw is provided on the lower side wall of the driving sleeve;

[0014] It is specified that the adjusting screw drives the driving sleeve to move in the air inlet joint, and the meshing action of the rack and the pinion causes the corresponding air inlet baffle to flip inside the air inlet joint, thereby adjusting the flow of working gas entering the air inlet joint, so that the present application can produce different types of jet plasma according to production needs.

[0015] Further, a sealing sleeve that is movably connected to the high-temperature-resistant pipe is slidably connected to the lower end of the gas outlet joint; the sealing sleeve is movably inserted into the inner wall of the gas outlet joint through an insertion rod; a first damping spring is provided on the insertion rod;

[0016] It is specified that when the high-temperature-resistant pipe is connected to the gas outlet joint, the sealing sleeve is tightly pressed against the top end of the high-temperature-resistant pipe under the action of the first damping spring, thereby ensuring the stability and sealing performance of the connection between the high-temperature-resistant pipe and the gas outlet joint.

[0017] Further, the upper end face of the top cover is provided with a mounting groove; the neutralizer is movably clamped in the mounting groove through a mounting sleeve; a plurality of fastening blocks movably clamped with the top cover are equidistantly distributed on the outer side wall of the mounting sleeve; a fastening top rod is arranged in the top cover and corresponds to each fastening block; each fastening top rod movably clamped with each fastening block is movably clamped with each fastening block, and the end of each fastening top rod away from each other is provided with a second damping spring abutting against the inner wall of the top cover;

[0018] It is specified that the neutralizer is inserted into the mounting groove through the mounting sleeve, at this time, each fastening top rod is close to the corresponding fastening block under the action of the second damping spring, and is movably clamped with the corresponding fastening block, thereby improving the installation convenience between the neutralizer and the top cover.

[0019] Further, each fastening top rod is provided with a release rod penetrating through the top cover and movably clamped with the top cover; a release disc movably clamped with the top cover is rotatably clamped on the upper end face of the top cover; an arc-shaped guide groove movably clamped with each release rod is arranged on the lower bottom face of the release disc;

[0020] It is specified that when the neutralizer needs to be disassembled, the release disc is rotated, so that each fastening top rod is away from each other under the action of the arc-shaped guide groove, and is separated from the corresponding fastening block.

[0021] Further, a pressing disc abutting against the upper end face of the radio frequency induction coil is movably clamped in the positioning clamping sleeve; an extrusion screw penetrating through the positioning clamping sleeve and abutting against the upper end face of the pressing disc is threadedly connected with the top cover; an insulating sleeve sleeved outside the high-temperature-resistant pipe is arranged on the lower bottom face of the top cover;

[0022] It is specified that the extrusion screw pushes the pressing disc to move in the positioning clamping sleeve, and the extrusion action of the pressing disc makes each layer of the radio frequency induction coil close to each other, so as to adjust the effective number of turns of the radio frequency induction coil, and realize the adjustment of the induction strength of the radio frequency induction coil.

[0023] Further, a connecting seat is arranged on the outer side wall of the outer cylinder;

[0024] It is specified that the connecting seat is used to connect and fix the device with the smelting furnace, thereby improving the use stability and safety of the device.

[0025] The application also provides an application of the radio frequency linear plasma device, which is applied to the smelting of vanadium-titanium magnetite based on the radio frequency linear plasma device.

[0026] The working principle of the application is as follows:

[0027] In use, the device is connected with a vanadium-titanium magnetite smelting furnace, an external radio frequency power source is connected with the radio frequency input joint, the gas inlet joint is connected with an external working gas supply device, and the liquid inlet pipe is connected with an external cooling liquid supply device, and the cooling liquid is discharged and collected through the liquid outlet pipe after flowing through the heat exchange coil; the alternating radio frequency current generated by the external radio frequency power source flows to the conductive base through the conductive top rod inside the radio frequency input joint, and is finally transmitted to the radio frequency induction coil; according to Faraday's law of electromagnetic induction, when the alternating radio frequency current is passed into the radio frequency induction coil, an alternating magnetic field is generated inside the radio frequency induction coil and outside the discharge chamber, and at the same time, an alternating electric field is induced by the alternating magnetic field; when the working gas flows through the discharge chamber, the alternating electric field causes the working gas to discharge, generating high-energy plasma; when the high-energy plasma passes through the neutralizer, the static charge is eliminated; the high-energy plasma is used to perform high-energy electron bombardment on the vanadium-titanium magnetite, so that the vanadium-titanium magnetite is melted and subjected to subsequent smelting treatment; when the cooling liquid flows through the heat exchange coil, the heat inside the shell body is taken out; wherein the working gas is one of Ar, N2, O2, NH3 and NO.

[0028] Compared with the prior art, the beneficial effects of the present application are reflected in the following aspects:

[0029] Firstly, the device structure of the present application is reasonable, has the advantages of low discharge gas pressure, high plasma density and good uniformity, because the discharge chamber made of high-temperature-resistant material is arranged inside the shell body, direct contact of high-energy plasma with the inner wall of the shell body is avoided, convection and conduction loss of energy is reduced, and energy utilization rate is improved;

[0030] Secondly, the present application adopts a ring-shaped radio frequency induction coil instead of a traditional induction electrode, and the radio frequency induction coil can generate high-density plasma at a lower radio frequency voltage, avoiding electrode pollution in the smelting process of vanadium-titanium magnetite, and the formed ring-shaped plasma can promote efficient smelting of vanadium-titanium magnetite, thereby significantly improving the content of titanium dioxide in the smelting product, and thus having good market competitiveness;

[0031] Thirdly, the present application can timely discharge the heat inside the shell body by passing cooling liquid into the heat exchange coil, ensuring the safe and stable operation of the device; at the same time, the device of the present application is provided with an air inlet flow adjusting assembly inside the air inlet joint, which can flexibly adjust the flow of working gas, so that the present application can generate different types of jet plasma according to production needs. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a longitudinal sectional view of the device of the present application;

[0033] Figure 2 is a front view of the device of the present application;

[0034] Figure 3 This is the present invention. Figure 1 A magnified view of a portion of point A in the middle;

[0035] Figure 4 This is a schematic diagram showing the connection between the intake flow regulating component and the intake connector of the present invention;

[0036] Figure 5 This is a diagram showing the distribution of the intake baffle inside the intake connector of the present invention;

[0037] Figure 6 This is a schematic diagram showing the connection between the release disc and the fastening rod of the present invention;

[0038] Figure 7 This is the present invention. Figure 1 A magnified view of a portion of point B in the middle;

[0039] Figure 8 This is a schematic diagram of the connection between the radio frequency input connector and the radio frequency induction coil of the present invention;

[0040] Among them, 1-outer shell, 10-outer cylinder, 11-top cover, 110-mounting groove, 12-bottom cover, 120-limiting countersunk hole, 13-air outlet connector, 130-sealing sleeve, 131-plug rod, 132-first damping spring, 14-shielding sleeve, 15-connecting seat, 2-discharge chamber, 20-high temperature resistant tube, 21-limiting seat, 22-air inlet connector, 23-air inlet flow regulating component, 230-air inlet baffle, 231-drive sleeve, 2310-threaded seat, 232-adjusting screw, 233-pinion, 23 4-Rack and pinion, 3-Neutralizer, 30-Air outlet, 31-Mounting sleeve, 310-Fastening block, 32-Fastening top rod, 320-Second damping spring, 321-Release rod, 33-Release disc, 330-Arc-shaped guide groove, 4-RF induction coil, 40-Positioning sleeve, 41-Conductive base, 42-RF input connector, 420-Conductive top rod, 421-Damping spring, 43-Pressure plate, 430-Extrusion screw, 44-Insulating sleeve, 5-Heat exchange coil, 50-Liquid inlet pipe, 51-Liquid outlet pipe, 52-Arc-shaped base. Detailed Implementation

[0041] Example 1

[0042] like Figure 1 The radio frequency linear plasma device shown includes an outer shell 1, a discharge chamber 2 movably disposed inside the outer shell 1, a neutralizer 3 disposed at the top of the outer shell 1 and communicating with the discharge chamber 2, a radio frequency induction coil 4 disposed inside the outer shell 1 and sleeved outside the discharge chamber 2, and a heat exchange coil 5 wound on the inner wall of the outer shell 1.

[0043] like Figure 1 , 2As shown in the drawings, the outer shell 1 includes an outer cylinder 10, a top cover 11 movably connected to the upper end of the outer cylinder 10, and a bottom cover 12 movably connected to the lower end of the outer cylinder 10; the top cover 11 is provided with a gas outlet connector 13 penetrating through the top cover 11; the lower end cover 12 is provided with a limiting counterbore 120 on the upper end face; the outer side wall of the outer cylinder 10 is provided with a liquid inlet pipe 50 and a liquid outlet pipe 51 respectively communicating with two ports of the heat exchange coil 5; the gas outlet connector 13 is threadedly connected with the top cover 11;

[0044] As shown in the drawings, Figure 1 the top end of the discharge chamber 2 is provided with a high-temperature-resistant pipe 20 movably connected with the gas outlet connector 13, and the bottom end of the discharge chamber 2 is provided with a limiting seat 21 movably connected with the limiting counterbore 120; the lower bottom surface of the bottom cover 12 is provided with an air inlet connector 22 communicating with the discharge chamber 2; the discharge chamber 2 and the high-temperature-resistant pipe 20 are both made of quartz glass;

[0045] As shown in the drawings, Figure 1 , 2 the neutralizer 3 communicates with the gas outlet connector 13, and the neutralizer 3 is provided with a gas outlet nozzle 30; the neutralizer 3 is a neutralizer in the prior art;

[0046] As shown in the drawings, Figure 1 , 2 , 8, the radio frequency induction coil 4 is arranged on the upper end face of the bottom cover 12 through a positioning sleeve 40, and the radio frequency induction coil 4 is sleeved outside the discharge chamber 2; the inner side wall of the outer cylinder 10 is provided with a conductive seat 41 slidably connected with two wire ends of the radio frequency induction coil 4; the outer side wall of the outer cylinder 10 is provided with a radio frequency input connector 42; the radio frequency input connector 42 is movably connected with a conductive top rod 420 penetrating through the outer cylinder 10 and abutting against the conductive seat 41; the side of the conductive top rod 420 away from the conductive seat 41 is sleeved with a damping spring 421 grounded with the inner wall of the radio frequency input connector 42.

[0047] Example 2

[0048] The difference between this embodiment and example 1 is that:

[0049] As shown in the drawings, Figure 4 , 5 the air inlet connector 22 is movably provided with an air inlet flow adjusting assembly 23 inside; the air inlet flow adjusting assembly 23 includes seven air inlet baffles 230 equidistantly distributed inside the air inlet connector 22, a driving sleeve 231 slidably connected with the air inlet connector 22, and an adjusting screw 232 rotatably connected with the outer side wall of the air inlet connector 22 and threadedly connected with the driving sleeve 231; both ends of each air inlet baffle 230 are provided with a pinion 233 penetrating through the air inlet connector 22; the lower bottom surface of the driving sleeve 231 is provided with a rack 234 meshingly connected with each pinion 233; the lower side wall of the driving sleeve 231 is provided with a threaded seat 2310 penetrating through the air inlet connector 22 and threadedly connected with the adjusting screw 232.

[0050] Embodiment 3

[0051] The difference between this embodiment and embodiment 2 is that:

[0052] As shown in Figure 3 , the inner lower end of the gas outlet joint 13 is slidingly clamped with a sealing sleeve 130 which is movably clamped with the high-temperature-resistant tube 20, and the sealing sleeve 130 is movably inserted with the inner wall of the gas outlet joint 13 through the insertion rod 131, and the first damping spring 132 is sleeved on the insertion rod 131.

[0053] Embodiment 4

[0054] The difference between this embodiment and embodiment 3 is that:

[0055] As shown in Figure 3 , 6 , the upper end surface of the top cover 11 is provided with a mounting groove 110; the neutralizer 3 is movably clamped inside the mounting groove 110 through the mounting sleeve 31; the outer side wall of the mounting sleeve 31 is equally distributed with three fastening blocks 310 which are movably clamped with the top cover 11; the inside of the top cover 11 and the position corresponding to each fastening block 310 are provided with a fastening top rod 32; each fastening top rod 32 can be movably clamped with each fastening block 310 one by one, and the end of each fastening top rod 32 away from each other is provided with a second damping spring 320 which abuts against the inner wall of the top cover 11; each fastening top rod 32 is provided with a release rod 321 which penetrates the top cover 11 and is slidingly clamped with the top cover 11; the upper end surface of the top cover 11 is rotatably clamped with the release disc 33 which is sleeved outside the neutralizer 3; the lower bottom surface of the release disc 33 is provided with an arc-shaped guide groove 330 which is slidingly clamped with each release rod 321 one by one.

[0056] Embodiment 5

[0057] The difference between this embodiment and embodiment 4 is that:

[0058] As shown in Figure 1 , the inside of the positioning clamping sleeve 40 is slidingly clamped with a pressure plate 43 which abuts against the upper end surface of the radio frequency induction coil 4; the top cover 11 is threadedly connected with the extrusion screw rod 430 which penetrates the positioning clamping sleeve 40 and abuts against the upper end surface of the pressure plate 43; the lower bottom surface of the top cover 11 is provided with the insulating sleeve 44 which is sleeved outside the high-temperature-resistant tube 20;

[0059] Embodiment 6

[0060] The difference between this embodiment and embodiment 5 is that:

[0061] As shown in Figure 1 , 2 , the outer cylinder 10 is sleeved with the shielding sleeve 14; the outer side wall of the outer cylinder 10 is provided with the connecting seat 15.

[0062] Embodiment 7

[0063] This example is the same as example 6 in that:

[0064] As shown in Figure 8 The inner wall of the outer cylinder 10 is provided with an arc-shaped clamping seat 52 which is movably clamped with the heat exchange coil 5.

[0065] Example 8

[0066] This example describes the application of the radio frequency linear plasma device, based on any one of the radio frequency linear plasma devices described in examples 1-7, it is applied to the smelting of vanadium-titanium magnetite.

Claims

1. A radio frequency linear plasma device, characterized by, The utility model relates to a neutralizer, including outer casing (1), the discharge chamber (2) of activity setting in the outer casing (1) inside, the neutralizer (3) of setting in the outer casing (1) top and with discharge chamber (2) intercommunication, the radio frequency induction coil (4) of setting in the outer casing (1) inside and the heat exchange coil (5) of winding setting on the inner wall of outer casing (1) are set up, The outer casing (1) includes an outer cylinder (10), a top cover (11) movably connected to an upper end of the outer cylinder (10), and a bottom cover (12) movably connected to a lower end of the outer cylinder (10); the top cover (11) is provided with an air outlet connector (13) penetrating therethrough; the lower end cover (12) is provided with a limiting counterbore (120) on an upper end surface thereof; an outer lateral wall of the outer cylinder (10) is provided with a liquid inlet pipe (50) and a liquid outlet pipe (51) respectively communicating with two ports of the heat exchange coil (5); The discharge chamber (2) is provided with a high-temperature-resistant pipe (20) movably connected to the air outlet connector (13) at a top end thereof, and is provided with a limiting seat (21) movably connected to the limiting counterbore (120) at a bottom end thereof; the bottom cover (12) is provided with an air inlet connector (22) communicating with the discharge chamber (2) on a lower bottom surface thereof; The neutralizer (3) communicates with the air outlet connector (13), and is provided with an air outlet nozzle (30) thereon; The radio frequency induction coil (4) is arranged on an upper end surface of the bottom cover (12) through a positioning clamping sleeve (40); an inner lateral wall of the outer cylinder (10) is provided with a conductive seat (41) slidably connected to two wire terminals of the radio frequency induction coil (4); an outer lateral wall of the outer cylinder (10) is provided with a radio frequency input connector (42); the radio frequency input connector (42) is movably connected with a conductive top rod (420) penetrating the outer cylinder (10) and abutting against the conductive seat (41) inside; the conductive top rod (420) is sleeved with a damping spring (421) on a side thereof away from the conductive seat (41) and grounded to an inner wall of the radio frequency input connector (42).

2. The radio frequency linear plasma device of claim 1, wherein, The air inlet connector (22) is movably provided with an air inlet flow adjusting assembly (23) inside; the air inlet flow adjusting assembly (23) includes a plurality of air inlet baffles (230) equidistantly distributed inside the air inlet connector (22), a drive sleeve (231) slidably connected to the air inlet connector (22), and an adjusting screw (232) rotationally connected to an outer lateral wall of the air inlet connector (22) and threadedly connected to the drive sleeve (231); both ends of each air inlet baffle (230) are provided with pinions (233) penetrating the air inlet connector (22); a lower bottom surface of the drive sleeve (231) is provided with a rack (234) meshingly connected to each pinion (233); a lower lateral wall of the drive sleeve (231) is provided with a threaded seat (2310) penetrating the air inlet connector (22) and threadedly connected to the adjusting screw (232).

3. The radio frequency linear plasma device of claim 1, wherein, The lower end of the gas outlet joint (13) is slidably connected with a sealing sleeve (130) movably connected with the high-temperature-resistant pipe (20), the sealing sleeve (130) is movably connected with the inner wall of the gas outlet joint (13) through a connecting rod (131), and the connecting rod (131) is provided with a first damping spring (132).

4. The radio frequency linear plasma device of claim 1, wherein, The upper end surface of the top cover (11) is provided with a mounting groove (110), the neutralizer (3) is movably connected in the mounting groove (110) through a mounting sleeve (31), the outer side wall of the mounting sleeve (31) is provided with a plurality of fastening blocks (310) movably connected with the top cover (11) at equal intervals, the inside of the top cover (11) and the positions corresponding to each fastening block (310) are provided with fastening top rods (32), each fastening top rod (32) is movably connected with each fastening block (310) one by one, and the ends of each fastening top rod (32) away from each other are provided with second damping springs (320) abutting against the inner wall of the top cover (11).

5. The radio frequency linear plasma device of claim 4, wherein, Each fastening top rod (32) is provided with a release rod (321) penetrating through the top cover (11) and slidably connected with the top cover (11), the upper end surface of the top cover (11) is rotatably connected with a release disc (33) sleeved outside the neutralizer (3), and the lower bottom surface of the release disc (33) is provided with arc-shaped guide grooves (330) slidably connected with each release rod (321) one by one.

6. The radio frequency linear plasma apparatus of claim 1, wherein, The inside of the positioning sleeve (40) is slidably connected with a pressing disc (43) abutting against the upper end surface of the radio frequency induction coil (4), the top cover (11) is threadedly connected with an extrusion screw rod (430) penetrating through the positioning sleeve (40) and abutting against the upper end surface of the pressing disc (43), and the lower bottom surface of the top cover (11) is provided with an insulating sleeve (44) sleeved outside the high-temperature-resistant pipe (20).

7. The radio frequency linear plasma device of claim 1, wherein, The outer side wall of the outer cylinder (10) is provided with a connecting seat (15).

8. Use of a radio frequency linear plasma device as claimed in any of the claims 1-7, characterized in that, It is applied to smelting of vanadium-titanium magnetite. It is applied to smelting of vanadium-titanium magnetite.

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