JP2011222502A - Plasma torch device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact plasma torch device which can improve a life of the device by facilitating adjustment of a plasma jet and suppressing wear of an electrode part.SOLUTION: The plasma torch device includes a device body part 10 including a first metal body part 20 electrically communicated with an anode 54, an insulating body part 30 assembled with the first metal body part 20, and a second metal body part 40 present in the insulating body part 30 and electrically communicated with a cathode 52; an electrode part 50 which includes the cathode 52 and an anode 54 disposed at an interval so as to form a plasma nozzle part in front of the cathode 52 and which generates plasma through discharge; and a body integrated-type gas passage 60 and cooling water passage 70 which are each provided in the device body part 10, and are used to supply gas to the electrode part 50 side and to cool the device. The body integrated-type cooling water passage 70 includes the first metal body part 20 of the device body part 10, a cooling water channel 70 provided in the insulating body part 30 and the second metal body part 40, and a space.

Description

  The present invention relates to a plasma torch device and a return ore processing method using plasma.

  Generally, a plasma torch for melting and spraying an object with a high temperature is provided with a cathode and an anode (nozzle) having a conical shape suitable for generating a high-temperature, high-speed plasma jet. It comprises an electrode, an insulator between the electrodes, a gas supply structure for supplying gas, a cooling structure for cooling the main part of the torch, and the like.

  In such a plasma spraying and melting process, an object, for example, a powder or a high-heat melting substance (a substance that melts when high heat is applied) is instantaneously melted using a plasma jet.

  However, most of the plasma torches known so far have been difficult to control a plasma jet, for example, a jet that easily changes the size (diameter), length, and the like of the jet.

  In addition, a gas supply structure (passage), which is a medium to be supplied to a conventional plasma torch, and a cooling water passage (cooling water supply, circulation, discharge structure) for cooling the plasma torch are integrated with the torch body. Therefore, there is a problem that the structure of the plasma torch is complicated overall and it is difficult to provide a compact torch.

  In addition, there is a problem in that the wear between the cathode and the anode where the arc is generated occurs so much that the cathode and the anode must be changed frequently.

  On the other hand, there is a return ore processing method in which return ore of a predetermined particle size is melt-bonded to the return ore using plasma of the plasma torch device. It was difficult to adjust the size (diameter).

  The present invention has been proposed to solve the above-described conventional problems, and its purpose is to facilitate the adjustment of the length and size (diameter) of the plasma jet (flame), and to provide cooling water and gas. (Medium) It is intended to provide a compact plasma torch device that can provide a compact device by integrating a passage inside the device, and that can suppress wear of electrode portions and improve the life of the device.

  In addition, another object of the present invention is to perform the return ore processing while minimizing the power consumption of the device during the return ore processing in which the return ore having a predetermined particle size is melt-bonded to the return ore using plasma by the plasma torch device. It is to provide a return processing method using plasma that can improve the efficiency of the process.

  As one embodiment of the technical aspect for achieving the above object, the present invention provides an apparatus body part, an electrode part provided in the apparatus body part for generating plasma through discharge, and the apparatus Provided is a plasma torch device which is provided in each body part, and which includes a gas passage and a cooling water passage integrated with a body for supplying gas to the electrode part side and cooling the apparatus.

  Further, as another embodiment of the technical aspect, the present invention includes an apparatus body part, an electrode part that is provided in the apparatus body part and generates plasma through discharge, and is disposed around the electrode part. At least one of a gas twisting means provided to twist the supply gas to prevent electrode wear and a magnet means provided to activate the flow of electrons and improve torch efficiency. Provided is a plasma torch device including the above.

  The plasma torch device having the gas twisting means and the magnet means is provided in each of the device body portions, supplies gas to the electrode portion side, and cools the device. A passage may further be included.

  Preferably, the electrode part includes a cathode provided inside the apparatus body part and an anode having a plasma nozzle part formed on the inside thereof at a distance so as to discharge in front of the cathode. .

  More preferably, the device body portion includes a first metal body portion that is in electrical communication with the anode of the electrode portion, an insulating body portion that is assembled with the first metal body portion, and is embedded in the insulating body portion. A second metal body portion that is in electrical communication with the cathode of the electrode portion is included.

  At this time, the first metal body portion includes a first body that forms an outer edge of the device, a housing that is assembled inside the first body and applies electricity while supporting the anode, and one of the first bodies. The first casing is configured to be assembled to the side to fix the anode.

  The insulating body portion is assembled to a first insulating body assembled inside the first body of the first metal body portion and the housing, and fixed to one side of the first body and the first insulating body. It is preferable to include a second insulating body that is a second casing.

  In addition, the second metal body part is assembled on the inner side across the first and second insulating bodies of the insulating body part, but is assembled so as to apply electricity to the cathode included in the electrode part. And an electric application piece assembled to the second body and fastened inside the cathode.

  Preferably, the body-integrated gas passage is formed between the first body and the second gas passage formed in the first body of the metal body portion and the housing, and the first insulating body and the housing of the insulating body portion. And a third gas passage provided in the gas twisting means disposed between the first insulating body and the housing.

  The gas twisting means is assembled in the form of a ring on the outer edge of the cathode between the housing of the first metal body part constituting the apparatus body part and the first insulating body of the insulating body part, and the body is tilted. It is preferable to provide a plurality of gas passages therethrough.

  The magnet means preferably includes a central main magnet ring and an outer edge ring assembled on both sides thereof and supported by the housing and the anode.

  More preferably, the cooling water passage includes first and second cooling water passages formed in the first body and the housing, a third cooling water passage formed in the first insulating body, and the second body. A fourth cooling water passage formed in the second body, a space formed between the second body and the cathode, and a fifth cooling water passage formed in the electricity application piece of the cathode fastened inside the second body. And a sixth cooling water passage formed inside the second body, and configured to cool the apparatus uniformly.

  Meanwhile, as another technical aspect, the present invention adjusts the gas flow rate supplied to the plasma torch device for generating plasma and the inner diameter of the plasma discharge nozzle portion of the anode of the electrode portion provided in the torch device. There is provided a return ore processing method using plasma characterized in that return ore is processed using two or more plasma torch devices configured to have different jet lengths and sizes.

  Preferably, a first row of plasma torch devices having a first plasma jet with a reduced diameter of the plasma jet but with an increased diameter are disposed at the top of the returned ore to be transported, behind the above-mentioned plasma torch device. A second row of plasma torch devices for generating a second plasma jet that is larger than the length of the first plasma jet but reduced in diameter is positioned between the first row of plasma torch devices. Increase the mineral processing area.

  According to such a plasma torch device of the present invention, it is easy to adjust the size of the plasma jet, that is, the length and size (diameter) of the plasma flame, while the cooling water and the gas (medium) passage are provided inside the device. By integrating, a more compact torch device can be provided, and further, the wear of the electrode portion can be suppressed and the life of the device can be improved.

  Further, according to the return ore processing method using plasma according to the present invention, the power consumption of the apparatus used for generating plasma during the return ore processing in which return ore having a predetermined particle size is melt-bonded to the return ore by a torch device is minimized. While saving labor, it is also possible to improve the productivity of return ore.

1 is an assembled state diagram illustrating the overall configuration of a plasma torch device according to the present invention. FIG. 2 is an exploded perspective view illustrating the plasma torch device of the present invention of FIG. 1. It is sectional drawing which illustrated the 1st body of the 1st metal body part which comprises the apparatus body part of this invention. It is sectional drawing which illustrated the housing of the 1st metal body part of this invention. a and b are a sectional view and a front view illustrating the first casing of the first metal body portion of the present invention. FIGS. 7A and 7B are a cross-sectional view and a front view illustrating a first insulating body of an insulating body portion constituting the device body portion of the present invention. It is sectional drawing which illustrated the 2nd insulation body of the insulation body part of this invention. It is sectional drawing which illustrated the 2nd body of the 2nd metal body part which comprises the apparatus body part of this invention. a and b are a side view and a front view illustrating an electric application piece of a second metal body portion of the present invention. a and c are side, front and rear views illustrating the cathode of the electrode part of the present invention. a and b are a sectional view and a front view illustrating the anode of the electrode portion of the present invention. a and b are side and front views illustrating the gas twisting means of the present invention. FIGS. 3A to 3D are structural views illustrating magnet means of the present invention. FIG. 3 is a plan structural view illustrating a gas / cooling water connection block attached to a first body of the first metal body part of FIG. 2. a and b are perspective views illustrating an assembled state of the plasma torch device according to the present invention. It is the schematic shown in order to demonstrate the return process method using the plasma (torch apparatus) by this invention.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

  1 and 2, the entire configuration of the plasma torch device 1 of the present invention is illustrated in an assembled state diagram and an exploded perspective view. 3 to 14 show the components of the present invention. FIG. 15 shows the external appearance of the assembled plasma torch device of the present invention. Further, FIG. 16 shows a return processing method using plasma (torch device) according to the present invention.

  First, as shown in FIGS. 1 and 2, the plasma torch device 1 of the present invention is basically provided inside the device body portion 10 (see FIGS. 3 to 9) and the device body portion 10 through the discharge. The electrode portion 50 (see FIGS. 10 to 11) for generating plasma is included.

  For example, as shown in FIGS. 1 and 2, when a gas (medium) G is supplied through the device body portion 10, plasma is formed through arc discharge in the electrode portion 50 to which a high voltage (high frequency application is possible) is applied. A plasma flame (flame) (see F1 and F2 in FIG. 16) is generated by a jet to enable fusion bonding of an object, that is, a return or the like.

At this time, in the plasma torch device of the present invention, air, nitrogen gas (N ₂ ), or the like can be used as the type of gas. However, there is a risk that the cost of nitrogen gas may be borne, but the apparatus of the present invention can realize a desired output (heating temperature) even if air is used.

  On the other hand, as shown in FIGS. 1 and 2, the plasma torch device 1 of the present invention is provided integrally with the device body portion 10 and includes a body integrated gas passage 60 and a device for supplying gas to the electrode portion 50 side. A body-integrated cooling water passage 70 to be cooled may be included.

  Further, the plasma torch device 1 according to the present invention is disposed around the electrode unit 50 as shown in FIGS. 1 and 2, and the supplied gas is twisted to move the arc point in the electrode unit to wear the electrode unit. Gas twisting means 80 (see FIG. 12) for preventing the above may be further included.

  Further, the plasma torch device 1 of the present invention is further provided with magnet means 90 (see FIG. 13) which is arranged around the electrode unit 50 as shown in FIGS. 1 and 2 and improves the torch efficiency by adjusting the flow of electrons. Can be included.

  The gas and cooling water passages 60 and 70, the gas twisting means 80, and the magnet means 90 will be described later in detail again.

  On the other hand, in the plasma torch device 1 of the present invention, the electrode unit 50 includes a cathode 52 (see FIG. 10) provided inside the device body unit 10 and a front side when a high voltage is applied as shown in FIGS. The anode 54 (see FIG. 11) is arranged at intervals so as to cause arc discharge, and is particularly easy to disassemble and assemble.

  The assembly structure of the anode 54 will be described in detail later.

  Accordingly, when a gas is supplied and a higher voltage is applied to the cathode and the anode, the plasma, that is, the plasma through the nozzle portion 54a of the anode 54 while forming a plasma jet flow that varies according to the flow rate of the supplied gas. A flame (flame) (see F1 and F2 in FIG. 16) is ejected.

  Eventually, the plasma torch device 1 of the present invention can control the plasma jet using various factors. For example, as shown in FIG. 11, the length and size (diameter) of the plasma jet are changed to the nozzle portion 54a of the anode 54. Can be easily adjusted by changing the inner diameter of the gas or by changing the flow rate of the gas to be supplied (G in FIG. 1).

  For example, if the gas flow rate is reduced, the length of the plasma jet is shortened and a wide range of heating is possible, but the temperature is lowered instead.

  On the contrary, when the gas flow rate is increased, the length of the plasma jet becomes longer, heating in a narrow range (area) is possible, and the temperature becomes higher.

  Therefore, the adjustment of the length and size (diameter) of the plasma jet (plasma flame (flame)) can be effectively applied during the return processing described below.

  Moreover, even if it is not a return ore processing, an effective plasma heat processing is enabled corresponding to the state of the object to be melted or sprayed.

  For example, as disclosed in Korean Patent Application No. 10-2006-0133199, when a return ore having a predetermined particle size is melt-bonded to a return ore using a flame of a plasma torch device, an optimum plasma jet for the return ore processing is used. Can be realized. For example, the gas flow rate suitable for the return ore processing is 15 to 17 L / min.

  At this time, as shown in FIGS. 1 and 2, the form of the plasma jet can also be adjusted by adjusting the distance between the cathode 52 and the anode 54.

  On the other hand, in the plasma torch device 1 of the present invention, since all the components are easily disassembled and assembled, the cathode 52 shown in FIGS. 10 and 11 and the anode 54 arranged at a distance from the cathode 52 are desired. It can be easily assembled in a state adjusted to the interval.

  On the other hand, as shown in FIGS. 2 and 10, in the plasma torch device of the present invention, the tip portion 52a of the cathode 52 is preferably formed of tungsten or the surface thereof is treated with tungsten. This reduces wear on the tip of the cathode where arcing takes place.

  As shown in FIGS. 2 and 11, the anode 54 is a cylindrical body whose outer edge is enlarged, and a plasma nozzle portion 54a is formed through the inside (center) thereof.

  Therefore, the plasma torch device 1 of the present invention can prepare a plurality of anodes 54 in which the inner diameter of the anode nozzle portion 54a is formed in various forms, and can be easily assembled and used in accordance with the plasma heating conditions.

  Furthermore, as shown in FIG. 11, a step 54b is formed in the nozzle portion 54a of the anode 54 of the present invention.

  Therefore, the anode of the present invention can induce a plasma overflow (that is, an overflow formed while the supplied gas passes through the stepped portion) in the stepped portion, and expands the plasma jet. , Further increase the thermal efficiency of the plasma.

  On the other hand, as shown in FIGS. 2 and 11, an assembly protrusion 54c for assembling is formed in a portion where the outer edge of the anode 54 is enlarged. Such an assembly protrusion is as shown in FIGS. It is a part fixed at the time of the assembly with the 1st casing 26 of the 1st metal body part 20 which comprises the apparatus body part 10. FIG.

  At this time, as shown in FIGS. 1 and 5, the first casing 26 is formed with a concave groove 26a for screw operation during assembly. That is, the screw S is formed in the first casing 26, and the screw is assembled and disassembled in the housing 24 of the first metal body portion 20.

  Accordingly, as shown in FIGS. 1 and 2, if the first casing 26 is disassembled from the housing 24, the electrode portion anode 54 can be easily disassembled and assembled.

  However, as shown in FIGS. 4 and 11, an inclined support surface 54 d is formed at the tip of the anode 54 so as to be in contact with the inclined protruding end 24 a inside the housing 24 of the first metal body 20. Has been.

  Accordingly, the anode is assembled in close contact with the housing, and at the same time, as shown in FIG. 1, a support surface having a tilted tip is brought into close contact with the protruding end of the housing, so that the cathode 52 that generates plasma through arc discharge. And the anode 54 are kept constant.

  For example, when the depth (length) at which the protruding end 24a of the housing and the inclined support surface 54d of the anode are in close contact with each other is adjusted, the distance between the cathode and the anode is precisely adjusted.

  Next, as shown in FIGS. 1 and 2, in the plasma torch device 1 of the present invention, the device body portion 10 that forms the frame of the device is a first metal body portion that is in electrical communication with the anode 54 of the electrode portion. 20 (FIGS. 3 to 5), an insulating body portion 30 (FIGS. 6 and 7) assembled with the first metal body portion 20, and a first electrode which is embedded in the insulating body portion 30 and electrically communicates with the electrode portion cathode 52. It can be roughly divided into two metal body portions 40 (FIGS. 8 and 9).

  For example, the first and second metal body parts 20 and 40 except for the insulating body part 30 are made of a metal material, for example, brass having high thermal conductivity.

  The first and second metal body parts 20 and 40 are assembled so as to be in electrical communication with the anode 54 and the cathode 52, respectively, so that a high voltage can be applied.

  Meanwhile, as shown in FIGS. 1 and 2, the insulating body part 30 is disposed between the first and second metal body parts 20 and 40 to provide an insulating function.

  Therefore, the first and second metal body parts 20 and 40 and the insulating body part 30 constituting the apparatus body part 10 of the present invention will be specifically described below.

  First, as shown in FIGS. 1 and 2, in the plasma torch device of the present invention, the first metal body portion 20 includes a first body 22 (see FIG. 3) that forms the outer edge of the device, and the first 1 is assembled to the inside of the body 22 and applies a high voltage while supporting the anode 54 of the electrode portion, and the electrode portion is assembled to one side of the first body 22 as described above. The first casing 26 (see FIG. 5) for fixing the anode 54 is configured.

  For example, as shown in FIGS. 1 and 2, the housing 24 is inserted inside the first body 22, and the protruding casing 54 c (see FIG. 11) of the anode 54 is supported by the housing 24. 26 is incorporated in the first body 22 in the form of a screw S.

  As described above, the first casing 26 is easily assembled or disassembled with the first body 22 in the form of a screw.

  At this time, the reference numeral “S” in the drawings indicates a screw fastening portion to which a male screw and a female screw of the components are fastened.

  Next, as illustrated in FIGS. 1 and 2, the insulating body part 30 is assembled to the inside of the first metal body part 20 across the first body 22 and the housing 24 (see FIG. 6). ) And a second insulating body 34 serving as a second casing, which is assembled by being fixed to one side of the first body 22 of the first metal body portion 20 and the first insulating body 32 with a bolt (see FIG. 7). Consists of.

  At this time, the second insulating body 34 presses and supports the first body 22 of the first metal body portion 20 and the rear end portion of the first insulating body 32 in a stepped form with bolts (not shown). One body 22 is incorporated.

  Accordingly, as shown in FIGS. 1 and 2, the body portion of the plasma torch device of the present invention includes the first body portion 22, and the first insulating body 32 and the first body in the form of bolts and screws on the left and right sides in the drawings. The casings 26 are respectively assembled and assembled so as to be in the form shown in FIGS. 15a and 15b as a whole.

  Finally, as shown in FIG. 15, it can be seen that the plasma torch device 1 of the present invention has a compact form. This is because, as shown in FIGS. 1 and 2, a plurality of parts constituting the device of the present invention are very tightly assembled and disassembled with a minimum space.

  Next, as shown in FIGS. 1 and 2, the second metal body part 40 is assembled inside the insulating body part 30 so as to apply a high voltage to the cathode 52 of the electrode part 50. Specifically, the second metal body part 40 is assembled inside the first and second insulating bodies 32 and 34 of the insulating body part 30. Further, the second metal body part 40 is assembled to the second body 42 (see FIG. 8) and the second body 42 which are assembled so as to apply a high voltage to the cathode 52, and inside the cathode 52. It is comprised with the electric application piece 44 (refer FIG. 9) fastened.

  Accordingly, as shown in FIGS. 1 and 2 and FIGS. 8 and 9, the second body 42 is compressed and fixed by the second insulating body 34, which is fastened to the first body 22 with bolts, and the electric body is located inside thereof. The application piece 44 is assembled in the form of a screw S, and the electric application piece 44 is assembled inside the cathode 52.

  At this time, as shown in FIG. 9, projecting ends 44 a are formed at predetermined intervals at the tip of the electric application piece 44 for closely contacting and fastening the cathode.

  As shown in FIG. 1, a fastening bolt 110 a for applying a high voltage to the cathode is fastened to the rear end portion of the second body 42 of the second metal body portion 40, and the insulating body portion 30. The support block 120 that is fastened to the first body 22 in an insulated state is provided with other voltage application fastening bolts 110b, and a voltage application cable (not shown) is connected to each fastening bolt. Is done.

  Therefore, in the plasma torch device of the present invention, a high voltage is applied to the cathode 52 and the anode 54 through the first and second metal body parts 20 and 40, respectively, and the insulating body part 30 is interposed therebetween. Yes.

  Next, as illustrated in FIGS. 1, 2, and 12, the plasma torch device 1 of the present invention further includes the gas twisting means 80 disposed around the electrode portion 50 as described above. . The gas twisting means 80 twists the supplied gas G to prevent wear of the electrode part by moving the arc point in the electrode part.

  For example, as shown in FIGS. 2 and 12, the gas twisting means 80 of the present invention includes the housing 24 of the first metal body portion 20 shown in FIG. 4 and the first of the insulating body portion 30 shown in FIG. It is provided in the form of a ring arranged between the insulating bodies 32 and is arranged on the outer edge of the cathode 52 of the electrode part.

  In particular, as shown in FIGS. 2 and 12, the ring-shaped body of the gas twisting means 80 has a third gas formed by one of the gas passages 60 described in detail below. The passage 60d is formed so as to penetrate in an inclined state.

  Accordingly, when the gas is supplied, the gas is uniformly spread between the electrode cathode 52 and the anode 54 by the gas passage 60d formed to be inclined to the gas twisting means 80 and supplied in a twisted state.

  In general, the plasma torch device is a principle that generates plasma through arc discharge when a high voltage is applied to the cathode and anode in a state where gas is supplied between the anode and cathode of the electrode part, for example. The anode and cathode parts of the electrode part wear easily.

  Therefore, in the electrode portion of the present invention, the arc point generated between the cathode and the anode by the gas twisting means 80 is not formed locally unlike the known conventional plasma torch, and the arc point is continuously generated. Can be moved (varied).

  When the wear of the cathode and the anode of the electrode portion becomes serious as in the prior art, it is impossible to generate an arc through arc discharge any more, which causes an interruption in the operation of the plasma torch device.

  In addition, the cathode and anode of the worn electrode part must be replaced frequently, and the shorter the wear cycle of the cathode and anode, the lower the productivity using the plasma torch device, which leads to an increase in manufacturing costs. .

  However, in the present invention, as described above, since the gas twisting means 80 continuously changes the arc generation point, wear of the cathode and anode of the electrode portion can be suppressed.

  The details of the operation of the present invention for suppressing wear of the cathode and anode of the electrode part are as follows. When the gas passes through the gas passage 60d formed through the upper body inclined in the gas twisting means 80, the gas twisting means 80 in the form of a ring rotates on the anode 54, so that the gas is separated from the cathode. It is supplied while spreading between the anodes, and the arc point is prevented from concentrating only in a part of the region, and wear of the electrode part due to the arc point concentration is suppressed.

  Next, as illustrated in FIGS. 1, 2, and 13, the plasma torch device 1 of the present invention further includes magnet means 90 disposed around the electrode portion 50. The magnet means 90 can adjust the flow of electrons to improve torch efficiency.

  At this time, the magnet means 90 is disposed between the housing 24 of the first metal body portion 20 and the anode 54 of the electrode portion 50.

  Therefore, since the magnet means generates magnetic force, the flow of electrons is activated at the time of plasma formation, and the efficiency of the plasma torch device is further improved.

  On the other hand, the magnet means 90 of the present invention comprises a central main magnet ring 92 and outer edge rings 94 and 96 assembled on both sides thereof, as can be seen from FIGS. The outer edge rings 94 and 96 include housing and anode contact protrusions 94a and 96a.

  The outer edge rings 94 and 96 include stepped portions 94b and 96b that are inserted into and supported by the inner diameter portion of the main magnet ring 92.

  Therefore, as shown in FIGS. 1, 2 and 13, the magnet means 90 of the present invention comprising the three parts of the main magnet ring 92 and the outer edge rings 94 and 96 is disposed on the outer edge of the anode 54 of the electrode portion. When the anode is assembled, the contact protrusions are supported and fixed by the housing and the anode, respectively.

  That is, since such a magnet means 90 can also be easily assembled or disassembled together with the anode during the assembly and disassembly of the first casing 26 described above, the plasma torch device 1 of the embodiment of the present invention can also adjust the magnetic force by changing the magnet ring. make it easier.

  Next, the plasma torch device 1 of the present invention includes a gas passage 60 and a cooling water passage 70 indicated by a one-dot chain line and a two-dot chain line in FIG. 1 respectively. In particular, these passages are integrated into the inside of the apparatus body portion 10. However, as shown in FIG. 15, the plasma torch device is characterized in that it is compact.

  That is, as shown in FIGS. 1 and 15, the plasma torch device 1 of the present invention can be a very compact torch device as a whole while supplying sufficient gas and cooling water.

  The plasma torch device 1 according to the embodiment of the present invention is very compact as a whole, and the operation efficiency of the device is remarkably increased by the above-mentioned several characteristic configurations, and further smooth cooling is performed. The lifespan of the product will be longer.

  In addition, since the electrode portion 50 including the cathode 52 and the anode 54 is also integrally incorporated in the first and second metal body portions 20 and 40 and the insulating body portion 30 of the device body portion 10, a more compact plasma torch device is provided. It becomes like this.

  At this time, although not separately indicated in FIG. 1, a packing (indicated by “◯” in FIG. 1) for blocking the leakage of the cooling water is provided between the components of the present invention.

  On the other hand, as shown in FIG. 1, in the plasma torch device 1 of the present invention, the gas passage 60 is formed in the first body 22 (see FIG. 3) and the housing 24 (see FIG. 4) described above. And the second gas passages 60a and 60b, and the space 60c formed between the first insulating body 32 (see FIG. 6) and the housing 24 (as shown in FIG. 2, the space '60c' is the outer edge of the housing 24). And a third gas passage 60d (see FIG. 12) of the gas twisting means 80 disposed between the first insulating body 32 and the housing 24 is formed as one path.

  As shown in FIG. 1, the plasma torch device 1 finally ejects the gas that has passed through the gas passage 60 as a plasma flame (see F1 and F2 in FIG. 16) through the anode nozzle portion 54a (see FIG. 1). 1, refer to the dot-dash line “G”).

  At this time, as shown in FIGS. 1, 14, and 15, the first body 22 is provided with a gas / cooling water passage connecting block 110, and the connecting block 110 has a first gas passage of the gas passage 60. 60a and passages 60a ′ and 70a ′ (see FIG. 14) communicating with the first cooling water passage 70a of the cooling water passage 70 described below are formed, respectively, and a cooling water supply pipe (hose) (not shown) and a gas supply are formed. It connects with the connection port (not shown) which connects a pipe | tube (not shown).

  Accordingly, as shown in FIG. 1, the gas G is supplied between the cathode 52 and the anode 54 of the electrode portion through the first gas passage 60a and the second gas passage 60b, and the space 60c and the third gas passage 60d.

  At this time, the gas is supplied through the gas twisting means 80 so as to be able to move the arc point, and the plasma torch device 1 forms plasma through arc discharge between the cathode and the anode to which a high voltage is applied. To do.

  Since the plasma jet formed in this way is emitted through the plasma nozzle portion 54a formed penetrating to the center side of the anode 54, the object is heated by the flame.

  Next, as shown in FIGS. 1 and 2, in the plasma torch device 1 of the present invention, the cooling water passage 70 is formed in the first body 22 (see FIG. 3) and the housing 24 (see FIG. 4). Formed in the formed first and second cooling water passages 70a and 70b, the third cooling water passage 70c formed in the first insulating body 32 (see FIG. 6), and the second body 42 (see FIG. 8). The fourth cooling water passage 70d, the space 70e (see FIG. 1) formed between the second body 42 and the cathode 52, and the cathode electric application piece 44 fastened inside the second body 42. 1 formed of a fifth cooling water passage 70f (see FIGS. 1 and 9) formed in the second body 42 and a sixth cooling water passage 70g (see FIG. 8) formed so as to penetrate the center side of the inside of the second body 42. Consists of two routes.

  At this time, as illustrated in FIGS. 1 and 15, a connection port 42 a to which a cooling water supply pipe (hose) is connected is fastened to the sixth cooling water passage 70 g of the second body 42.

  14 and 15, the gas / cooling water passage connecting block 110 communicates with the first cooling water passage 70a and is connected to the connecting passage 70a ′. Are connected to each other (not shown).

  Therefore, as shown in FIGS. 1 and 15, in the plasma torch device 1 of the present invention, the cooling water W (the two-dot chain line in FIG. 1) is supplied from the first and second metal body portions 20 and 40 and the insulating body. The first to sixth cooling water passages and the space formed so as to communicate with a plurality of components of the section 30 (the cooling water is supplied in the direction of the sixth cooling water passage to the first cooling water passage). Is done.

  That is, since the cooling water passage of the present invention passes through almost all components of the plasma torch device 1 of the present invention, the plasma torch device 1 can be cooled more effectively. Such a cooling water passage prevents damage to the device due to heat and extends the life of the torch device.

  At this time, as described above, when the plurality of component parts of the first and second metal body parts 20 and 40 excluding the insulating body part are made of brass excellent in heat conduction, high-temperature heat is excellent in heat transfer. It is transmitted to the cooling water that is supplied and discharged continuously through brass. Therefore, the plasma torch device 1 has a high cooling efficiency and an excellent cooling action.

  As described above, the plasma torch device 1 of the present invention has several characteristic means, that is, plasma while suppressing wear of the electrode part by the gas twisting means 80 and the magnet means 90 around the electrode part. Since the efficiency is remarkably improved and the gas and the cooling water passage are integrated into the apparatus, the size of the apparatus can be made compact as shown in FIGS. 15a and 15b.

  Next, a return ore processing method using plasma will be described with reference to FIG. FIG. 16 illustrates a return ore processing method using plasma. Specifically, the plasma torch device 1 of the present invention described so far can be used.

  First, the return ore processing will be described. Sintered ore is produced through a sintering process of various iron ores, which are the main raw materials of sintered ore, and silica materials, serpentine, limestone, and anthracite, coke, which are fuels. At this time, the produced sintered ore is returned to a screen with a grain size of 6 mm or less (sintered ore that is recovered in the sintering process without sending the sintered ore with a grain size of 6 mm or less to the blast furnace is usually returned to the return ore (return). ore) ') and larger sinters.

  That is, since the particle size of the sintered ore that can be used in the blast furnace is about 6 to 50 mm, the sintered ore having a particle size of 6 mm or less is reintroduced into the sintered ore production process again.

  On the other hand, Korean patent application 10-2006-0133199 filed by the applicant of the present application discloses a return processing method using plasma in which return ore having a predetermined particle size is melted by plasma to agglomerate to increase productivity. Yes.

  That is, when the return ore reprocessing step of re-injecting the return ore into the sintering process is omitted, and the already returned return ore is produced into a return ore having a particle size (diameter) larger than 6 mm that can be input into the blast furnace, It is preferable in terms of productivity and cost saving.

  At this time, as shown in FIG. 16, the feature of the return ore processing method of the present invention is that the plasma torch device 1 of the present invention described so far is used, and the gas flow rate to be supplied and the anode nozzle part (54a in FIG. ) Is adjusted so that the length and diameter of the plasma jet flows (flame) F1 and F2 are different. For example, at least two torch devices 1a and 1b are arranged, and the return ore is processed into the return ore bodies 200a and 200b.

  That is, as shown in FIG. 16, the length of the plasma jet is reduced on the upper portion of the return ore that is packed and transferred to the refractory block box 210 that is a return ore transfer means provided continuously by the transfer conveyor 210a. However, a first row of plasma torch devices 1a, 1a, 1a,... Having a first plasma jet F1 having an enlarged diameter are arranged.

  In the rear of the first row of plasma torch devices 1a, 1a, 1a,..., The length of the plasma jet is larger than that of the first plasma jet, but the diameter is reduced. The second row of plasma torch devices 1b, 1b, 1b,... That form two plasma jets F2 are arranged between the first row of plasma torch devices 1a, 1a, 1a,.

  Therefore, compared with the conventional method of agglomerating the return ore using a plasma flame (jet flow) having the same plasma jet (flame), the present invention has a larger heating area and a larger molten area than the return ore 200a. In addition, since the small return ore 200b having a small heating area but high temperature is linked, it is possible to produce a return ore having a larger area as a whole. At this time, since it is not heated and melted by a two-row plasma torch device as a whole, the thermal efficiency is also excellent.

  As described above, the plasma torch device 1 of the present invention can easily adjust the length and size (diameter) of the plasma jet through the adjustment of the gas flow rate and the inner diameter of the anode nozzle portion. Can be used to combine more areas of return ore. That is, it allows for the combination of larger areas of return ore while reducing heat loss.

  At this time, since the plasma torch device has improved the efficiency of the return ore processing, the power consumption by using the plasma torch device is reduced.

  For example, as a result of the application of the present invention to the line, the power consumption can be reduced by about 5-10% compared to the existing case using the same plasma jet, and the production of the melt-bonded return ore is also existing. It was found that the unit price of production can be further reduced from 18,000 won to 13,000 won while increasing from 180 kg (production price is roughly 18,000 won) to 220 kg.

  Therefore, the plasma torch device 1 of the present invention described so far facilitates the adjustment of the length and size (diameter) of the plasma jet (flame) and is compact by integrating the cooling water and gas (medium) passages inside the device. Equipment can be provided.

  Furthermore, it is possible to suppress wear of the electrode part and improve the life of the apparatus.

  Moreover, when processing a return ore using such a compact plasma torch apparatus, there exists an advantage of making it possible to improve the efficiency of a return ore process, minimizing the power consumption of an apparatus.

  While the invention has been illustrated and described with reference to specific embodiments, it is to be understood that the invention can be variously modified and varied without departing from the spirit and scope of the invention as defined by the appended claims. This makes it clear that those with ordinary knowledge in the industry can easily understand.

DESCRIPTION OF SYMBOLS 1 Plasma torch apparatus 10 Apparatus body part 20 1st metal body part 22 1st body 24 Housing 26 1st casing 30 Insulating body part 32 1st insulating body 34 2nd insulating body 40 2nd metal body part 42 2nd body 44 Cathode Electric application piece 50 Electrode portion 52 Cathode 54 Anode 60 Gas passage 70 Cooling water passage 80 Gas twisting means 90 Magnet means 110 Gas / cooling water connection block 120 Support blocks 200a and 200b Treated return ore 210 and 210a Return ore transfer means

Claims (22)

A device body,
An electrode part provided in the device body part for generating plasma through discharge;
A body-integrated gas passage and a cooling water passage which are respectively provided in the device body portion, supply gas to the electrode portion side, and cool the device;
A plasma torch device comprising the above. A device body,
An electrode part provided in the device body part for generating plasma through discharge;
The gas twisting means disposed to surround the electrode part and provided to twist the supply gas to prevent wear of the electrode part and to activate the flow of electrons and improve the torch efficiency. At least one of the magnet means;
A plasma torch device comprising the above.   3. The plasma torch according to claim 2, further comprising a body-integrated gas passage and a cooling water passage which are respectively provided in the device body portion, supply gas to the electrode portion side, and cool the device. apparatus. The electrode portion includes a cathode provided inside the device body portion;
An anode having a plasma nozzle portion formed on the inside thereof at an interval so as to generate a discharge in front of the cathode;
The plasma torch device according to any one of claims 1 to 3, wherein the plasma torch device includes: The cathode tip is formed of tungsten or surface treated to prevent wear,
5. The plasma torch device according to claim 4, wherein the nozzle portion of the anode further includes a step formed to induce overflow of the plasma jet. The device body portion includes a first metal body portion that is in electrical communication with an anode provided in the electrode portion;
An insulating body part assembled with the first metal body part;
A second metal body part that is embedded in the insulating body part and electrically communicates with a cathode provided in the electrode part;
The plasma torch device according to any one of claims 1 to 3, wherein the plasma torch device includes: The first metal body portion includes a first body that forms an outer edge of the device;
A housing that is assembled inside the first body and applies electricity while supporting the anode;
A first casing assembled to one side of the first body to secure the anode;
The plasma torch device according to claim 6, comprising: The insulating body part includes a first insulating body assembled inside the first metal body part across the housing and the housing;
A second insulating body which is a second casing assembled and fixed to one side of the first body and the first insulating body;
The plasma torch device according to claim 6, comprising: A second body assembled to apply electricity to a cathode provided in an electrode portion inside the first and second insulating bodies of the insulating body portion;
An electric application piece assembled to the second body and fastened to the inside of the cathode;
The plasma torch device according to claim 6, comprising:   The body-integrated gas passage includes a first metal body portion constituting an apparatus body portion, a cooling water passage and a space provided in an insulating body portion and gas twisting means included in the first metal body portion, The plasma torch device according to claim 1 or 3, wherein gas is supplied between a cathode and an anode of the electrode portion. The gas passage includes first and second gas passages formed in a first body and a housing of the metal body portion,
A space formed between the first insulating body of the insulating body portion and the housing;
A third gas passage provided in a gas twisting means disposed between the first insulating body and the housing;
The plasma torch device according to claim 10, comprising:   A connecting block connected to the first gas passage of the first body and fixed to the first body is fastened with a connecting port for gas supply, gas flows into the first gas passage, and second and second The plasma torch device according to claim 11, wherein the plasma torch device is supplied between the cathode and the anode of the electrode portion through the three gas passages and the space.   The gas twisting means is assembled between the housing of the first metal body part constituting the apparatus body part and the first insulating body of the insulating body part in the form of a ring at the outer edge of the cathode, and tilts and penetrates the fuselage. The plasma torch device according to claim 2, further comprising a gas passage.   The magnet means is assembled and disposed between the housing of the first metal body part constituting the device body part and the anode of the electrode part, and improves the torch efficiency by activating the flow of electrons by magnetic force. The plasma torch device according to claim 2, wherein the plasma torch device is provided.   The plasma torch device according to claim 14, wherein the magnet means includes a central main magnet ring and an outer edge ring assembled on both sides thereof and supported by the housing and the anode.   The body-integrated cooling water passage includes a first metal body portion constituting the device body portion, a passage provided in the insulating body portion and the second metal body portion, and a space, and is configured as a single passage. The plasma torch device according to claim 1 or 3, wherein The cooling water passage includes first and second cooling water passages formed in a first body and a housing of the first metal body portion,
A third cooling water passage formed in the first insulating body of the insulating body portion;
A fourth cooling water passage formed in the second body of the second metal body portion;
A space formed between the second body and the cathode;
A fifth cooling water passage formed in the cathode electric application piece fastened to the inside of the second body;
A sixth cooling water passage formed in the second body;
The plasma torch device according to claim 16, wherein the device is configured to cool the entire device uniformly.   A cooling water supply connection port is fastened to the sixth cooling water passage of the second body, and a cooling water discharge connection port is fastened to the connection block connected to the first cooling water passage of the first body. The plasma torch device according to claim 17, wherein the cooling water flows into the sixth cooling water passage and is discharged from the first cooling water passage through the passage and the space. In the return processing method using plasma,
Two or more plasma jet lengths and sizes are adjusted by adjusting the gas flow rate supplied to the plasma torch device for generating plasma and the inner diameter of the plasma discharge nozzle portion of the electrode portion anode provided in the torch device. A return ore processing method using plasma, wherein the return ore is processed using the plasma torch apparatus of No. 1.   A first row of plasma torch devices having a first plasma jet with a reduced plasma jet length but a larger diameter is disposed at the top of the returned ore to be transferred. A second row of plasma torch devices that generate a second plasma jet that is larger than the length of the plasma jet but reduced in diameter are positioned between the first row of plasma torch devices. The return ore processing method using plasma according to claim 19, wherein the return ore processing area is increased.   The plasma torch apparatus according to claim 20, wherein the plasma torch apparatus uses the plasma torch apparatus according to claim 4.   The plasma torch device according to claim 20, wherein the plasma torch device uses the plasma torch device according to claim 6.

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