CN102304625B - Electroslag furnace with special vacuum system - Google Patents
Electroslag furnace with special vacuum system Download PDFInfo
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- CN102304625B CN102304625B CN 201110266989 CN201110266989A CN102304625B CN 102304625 B CN102304625 B CN 102304625B CN 201110266989 CN201110266989 CN 201110266989 CN 201110266989 A CN201110266989 A CN 201110266989A CN 102304625 B CN102304625 B CN 102304625B
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Abstract
The invention discloses an electroslag furnace with a vacuum system. The electroslag furnace is characterized in that: the electroslag furnace contains an independent vacuum system. Any one of the dynamic sealing forms, which are a reduced-pressure vacuum dynamic sealing form, a sleeve type evacuated housing graphite self-lubricating dynamic sealing form, a sliding-type formica vacuum dynamic sealing form and a bellow vacuum sealing form, is adopted in the vacuum system. A cyclone dust collector is adopted as a dust removing apparatus. A metal mesh dust-removing filter is adopted as a vacuum filtering apparatus. The vacuum system is also provided with an explosion proof apparatus. When the embodiment of the invention is applied, under a zero load condition, the air pressure in a vacuum chamber of the vacuum electroslag furnace can be pumped to 100Pa within 30 minutes, such that a vacuum electroslag furnace initial smelting pressure is reached. A zero load ultimate vacuum degree in the vacuum chamber can reach 1Pa. When in use, a substantial metallurgical effect can be achieved. The electroslag furnace plays an important role in the improving of electroslag quality, and is suitable to be popularized in the market.
Description
Technical field
The invention belongs to the vacuum metallurgy field, what be specifically related to is a kind of electroslag furnace with vacuum system.
Background technology
Vacuum metallurgy technology is the modern metallurgical technology that progressively grows up on the basis of original various metallurgical technologies, be characterized in metallurgical equipment, to make a kind of vacuum atmosphere, so that the obnoxious flavour impurity [O] in the metallurgical melt, [N], [H] etc. constantly therefrom are evaporated under condition of high vacuum degree, thereby Effective Raise the clarity of molten steel, smelt high-quality steel alloy.The vacuum metallurgy development has produced several different methods so far, mainly comprises molten steel vacuum-treat, vacuum induction melting, vacuum consumable (electric arc) melting and vacuum electron beam melting etc.Yet so far, vacuum technique is not yet well used in the metallurgical technology of electroslag casting and so on.
Fail to use the common electrical slag hearth of vacuum apparatus and generally can not more effectively remove the harmful elements such as [N] in the molten steel, [H], [O], [Pb], [Sn], [Sb], can not the alloy steel grades such as the high Al of melting, Ti.Can predict, if increase vacuum system at existing common electrical slag hearth, realize vacuum electroslag remelting, not only can solve the problem of above-mentioned two aspects, and it be poor to eliminate consumable electrode vacuum furnace remelting ingot surface quality, easily produces the shortcomings such as white point.From long-range angle, development vacuum electric slag hearth is produced very hopeful
Summary of the invention
The invention provides a kind of electroslag furnace with vacuum system, it is characterized in that designed electroslag furnace vacuum system is the dynamic-seal vacuum chamber (1) by electroslag furnace, vacuum meter (2), explosion-proof equipment (3), fly-ash separator (4), vacuum valve (5), (6), (11), (12), (13), (14), (15), vacuum filter (7) and (9), thermometer (8) and (10), vacuum unit (16) and (17) form, wherein vacuum unit (16) and (17) are separate, be parallel to together by pipeline through vacuum valve (14) and (15) separately from each other, then communicate with 2 vacuum filters (7) and (9) that outlet pipe has been connected in parallel by the vacuum system pipeline, thermometer (8) and (10) are housed respectively on vacuum filter (7) and (9) separately, and vacuum valve (5) is housed on the intake ducting of vacuum filter (7), outlet pipe is equipped with vacuum valve (12), vacuum valve (6) is housed on the intake ducting of vacuum filter (9), outlet pipe is equipped with vacuum valve (13), after being connected in parallel, the intake ducting of the same vacuum filter of vacuum filter (7) (9) is connected with the escape pipe of fly-ash separator (4), the escape pipe of the inlet pipe of fly-ash separator (4) and explosion-proof equipment (3) is connected, explosion-proof equipment (3) is provided with vacuum meter (2), the inlet pipe of explosion-proof equipment (3) communicates with the dynamic-seal vacuum chamber (1) of electroslag furnace, and the vacuum unit (16) that is connected in parallel and (17) also directly are connected by the escape pipe of vacuum valve (11) and the same fly-ash separator of pipeline (4).
According to the present invention, be characterised in that with the electroslag furnace of vacuum system the dynamic sealing device of dynamic-seal vacuum chamber (1) in the described electroslag furnace refers to any one in following 4 kinds of dynamic sealing devices, wherein,
The decompression type vacuum dynamic seal, mainly by being dummy electrode (18), planar sealing pad (19), reduced pressure sealing cover (20), middle pumping chamber (21), circumferential clasp (22), sealing-ring (23), vacuum (-tight) housing (24), outside relief groove (25), empty bleeding point (26), inboard relief groove (27) joins and is sealed to form, wherein, decompression type vacuum dynamic seal device is provided with planar sealing pad (19) and reduced pressure sealing cover (20) and outside relief groove (25) and inboard relief groove (27) in the outside of dummy electrode (18), utilizing circumferential clasp (22) that reduced pressure sealing cover (20) is pressed with the vacuum (-tight) housing (24) that links to each other with crystallizer is stuck, reduced pressure sealing cover (20) is with being added with sealing-ring (23) between the vacuum (-tight) housing, the external independent vacuum pump of vacuum pumping opening;
Telescopic vacuum (-tight) housing graphite self-lubricating vacuum dynamic seal, mainly by dummy electrode (18), porcelain plate folder (29), telescopic dynamic seal upper flange (30), flange seal ring (31), sealed graphite piece (32), upper bush (33), sleeve seal circle (34), lower sleeve (35), crystallizer (36) joins and is sealed to form, wherein in telescopic dynamic seal upper flange (30), add the sealed graphite piece, then rely on the porcelain plate folder (29) of porcelain plate that upper and lower surface the adds formation of telescopic dynamic seal upper flange (30), so that be able to effectively fixing between upper flange (30) and the sealed graphite piece (32), be equipped with flange seal ring (31) between telescopic dynamic seal upper flange (30) and the upper bush (33), be equipped with sleeve seal circle (34) sealing between upper bush (33) and the lower sleeve (35), rely on the sealing-ring sealing between lower sleeve (35) and the crystallizer (36);
Slide sheet type bakelite vacuum dynamic seal, mainly by dummy electrode (18), bakelite sealing slide plate (37), spring (38), slide sheet type dynamic seal upper flange (39), vacuum (-tight) housing (40), seal strip (41), crystallizer sealing-ring (42), crystallizer (36) joins and is sealed to form, wherein in slide sheet type dynamic seal upper flange (39), be inlaid with bakelite sealing slide plate (37), slide sheet type dynamic seal upper flange (39) and have between the bakelite sealing slide plate (37) and be equipped with spring (38), under the support of spring (38), so that close contact between the bakelite sealing same dummy electrode of slide plate (37) (18), vacuum (-tight) housing is equipped with seal strip in (40), is equipped with crystallizer sealing-ring (42) between vacuum (-tight) housing (40) and the crystallizer (36);
Bellows-type vacuum-sealing, mainly by being dummy electrode (18), insulation compressing tablet (43), bellows-type dynamic seal upper flange (44), corrugated tube flange (45), corrugated tube (46), vacuum (-tight) housing (47), bakelite diaphragm seal (48), sealing-ring (49), crystallizer sealing-ring (42), crystallizer (36) joins and is sealed to form, wherein bellows-type dynamic seal upper flange (44) is embedded with bakelite diaphragm seal (48), two insulation compressing tablets (43) are clipped in bellows-type dynamic seal upper flange (44) and bakelite diaphragm seal (48) wherein, be added with sealing-ring (49) between bellows-type dynamic seal upper flange (44) and the corrugated tube flange (45), seamless link between the same vacuum (-tight) housing of corrugated tube (46) (47) is equipped with crystallizer sealing-ring (42) between vacuum (-tight) housing (47) syncrystallization device (36).
According to the present invention, be characterised in that with the electroslag furnace of vacuum system fly-ash separator (4) refers to cyclone dust collector in the described electroslag furnace vacuum system,
According to the present invention, be characterised in that with the electroslag furnace of vacuum system vacuum filter (7) and (9) refer to the wire netting dust removal filter in the described electroslag furnace vacuum system.
According to the present invention, electroslag furnace with vacuum system is characterised in that the explosion-proof equipment in the vacuum system is by inlet mouth (50) in the described electroslag furnace, explosion-proof valve body ring flange (51), venting of dust explosion panel (52), venting of dust explosion bolt (53), venting of dust explosion spring (54), explosion-proof valve body (55), air outlet (56) forms, wherein a plurality of have the single head venting of dust explosion bolt (53) of hold-doun nut to pass respectively venting of dust explosion spring (54) and venting of dust explosion panel (52), tighten and be fixed on the explosion-proof valve flange (51), venting of dust explosion spring (54) is in strained condition between nut and the venting of dust explosion panel (52) at the venting of dust explosion bolt (53).
According to the present invention, the inlet pipe that is characterised in that wherein said explosion-proof equipment (3) with the electroslag furnace of vacuum system communicates with the dynamic-seal vacuum chamber (1) of electroslag furnace and refers to and can be connected at any one the suitable opening with the dynamic-seal vacuum chamber (1) of electroslag furnace.
Description of drawings
Accompanying drawing 1 is electroslag furnace vacuum system structural representation;
Accompanying drawing 2 is decompression type vacuum dynamic seal structure schematic top plan view A-A cross-sectional schematic;
Accompanying drawing 3 is decompression type vacuum dynamic seal structure schematic top plan view;
Accompanying drawing 4 is telescopic vacuum (-tight) housing graphite self-lubricating vacuum dynamic seal structural representation;
Accompanying drawing 5 is slide sheet type bakelite vacuum dynamic seal structural representation;
Accompanying drawing 6 is bellows-type vacuum dynamic seal structural representation;
Accompanying drawing 7 is vacuum system explosion-proof equipment schematic diagram.
Embodiment
The traditional electrical slag hearth is comprised of three parts usually: mechanical system, power supply system, Controlling System, mechanical system comprise the equipment such as rise fall of electrodes column, electric-pole horizontal arm, electrode rotary hoisting appliance, terminal clamp, dummy electrode, crystallizer platform, water mold, smoke evacuation dedusting; Power supply system comprises High-Voltage Electrical Appliances cabinet, transformer, heavy current circuit, current transformer, transfer switch etc.; Controlling System comprises high pressure switching, low voltage operated instruction element, electric motor, rise fall of electrodes and rotation control mechanism, panel indicating instrument and signal lamp etc.The purpose of this invention is to increase by a cover vacuum system on the basis of common electrical slag hearth again, so that the common electrical slag hearth can carry out esr in vacuum atmosphere, smelts high-quality alloy product.
The vacuum system that is used for electroslag furnace is compared with the vacuum system of other vacuum metallurgy equipment has obvious difference, this is because melt and chemical reaction because of slag in the esr process, make and emit a large amount of high-temperature gases in the body of heater, and also comprise the dust with certain viscosity in the high-temperature gas, make the Working environment of vacuum system more abominable, this has also brought suitable difficulty to this invention.In addition, because it is consumable electrode by molten steel ingot that electroslag furnace needs often loading and unloading, the dummy electrode surface of using also has certain roughness etc., vacuum chamber and dynamic seal all should have corresponding structure and measure and guarantee enough vacuum tightness, may set off an explosion when utilizing in addition vacuum electroslag melting titanium, zirconium alloy, therefore, vacuum system also should be provided with to possess has explosion prevention function to get related device.
Considered above-mentioned factor, the present invention has at first designed a kind of electroslag furnace with vacuum system, wherein designed electroslag furnace vacuum system structural representation as shown in Figure 1,1 is the dynamic-seal vacuum chamber of electroslag furnace among the figure, 2 is vacuum meter, 3 is explosion-proof equipment, 4 is fly-ash separator, and 5,6,11,12,13,14,15 are vacuum valve, and 7 and 9 is vacuum filter, 8 and 10 is thermometer, and 16 and 17 is the vacuum unit.As seen from the figure, in this cover vacuum system, have 2 vacuum units 16 and 17, vacuum unit 16 and 17 is separate, be parallel to together by pipeline through vacuum valve 14 and 15 separately from each other, then communicate with 2 vacuum filters 7 and 9 that outlet pipe has been connected in parallel by the vacuum system pipeline, thermometer 8 and 10 are housed respectively on the vacuum filter 7 and 9 separately, and vacuum valve 5 is housed on the intake ducting of vacuum filter 7, outlet pipe is equipped with vacuum valve 12, vacuum valve 6 is housed on the intake ducting of vacuum filter 9, outlet pipe is equipped with vacuum valve 13, vacuum filter 7 is connected with the escape pipe of fly-ash separator 4 after being connected in parallel with the intake ducting of vacuum filter 9, the escape pipe of the inlet pipe of fly-ash separator 4 and explosion-proof equipment 3 is connected, explosion-proof equipment 3 is provided with vacuum meter 2, the inlet pipe of explosion-proof equipment 3 communicates with the dynamic-seal vacuum chamber 1 of electroslag furnace, according to different electroslag furnace structures, can realize being connected with explosion-proof equipment 3 inlet pipe at any one suitable position opening in dynamic-seal vacuum chamber 1, the vacuum unit 16 and 17 that is connected in parallel in addition also directly is connected by vacuum valve 11 and the pipeline escape pipe with fly-ash separator 4.
The vacuum valve of all pipelines all is in closing condition before the work.At first open vacuum valve 11 during work, then open vacuum valve 14, start vacuum unit 16, also can open vacuum valve 15, start vacuum unit 17, dynamic-seal vacuum chamber 1 to electroslag furnace implements to vacuumize, and observed pressure table 2 is when vacuum tightness reaches preset value by the time, open vacuum valve 5 and 12, perhaps open vacuum valve 6 and 13, close vacuum valve 11, begin to start the melting of electroslag furnace slag.Until electroslag casting finishes, close vacuum unit and all valves.
In this vacuum system device, vacuum meter 2 is the particularly vacuum tightness of dynamic-seal vacuum chamber of measurement and monitoring vacuum system.Thermometer 8 and 10 is used for measuring spent air temperture, reliable in order to guarantee device security, the vacuum filter 7 at thermometer place and 9 spent air temperture will be controlled at 60-70 ℃ and be advisable, if be higher than this temperature range, then must strengthen the cooling intensity of each equipment in the whole electroslag casting, spent air temperture is reduced to below 70 ℃.
Dynamic-seal vacuum chamber 1 is one of relatively more crucial equipment configuration in the whole vacuum system, wherein the structure of dynamic sealing device is most important, this invention has provided 4 kinds of dynamic seal forms altogether, i.e. decompression type vacuum dynamic seal, telescopic vacuum (-tight) housing graphite self-lubricating vacuum dynamic seal, slide sheet type bakelite vacuum dynamic seal and bellows-type vacuum-sealing.4 kinds of dynamic sealing devices are shown in accompanying drawing 2,3,4,5,6.Wherein accompanying drawing 3 is vertical views of decompression type vacuum dynamic seal device, and shown in the accompanying drawing 2 is the schematic diagram of the A-A cross-section structure of decompression type vacuum dynamic seal device vertical view 3.In accompanying drawing 2: 18 is dummy electrode, and 19 is planar sealing pad, and 20 is the reduced pressure sealing cover, and 21 is middle pumping chamber, 22 is circumferential clasp, and 23 is sealing-ring, and 24 is vacuum (-tight) housing, and 25 is outside relief groove, 26 is vacuum pumping opening, and 27 is inboard relief groove, and 28 is consumable electrode.All join with sealed between all parts by accompanying drawing 2 and accompanying drawing 3 visible dynamic seals, wherein decompression type vacuum dynamic seal device is provided with planar sealing pad 19 and reduced pressure sealing cover 20 and outside relief groove 25 and inboard relief groove 27 in the outside of dummy electrode 18, utilizing circumferential clasp 22 that reduced pressure sealing cover 20 is pressed with the vacuum (-tight) housing 24 that links to each other with crystallizer is stuck, reduced pressure sealing cover 20 is with being added with sealing-ring 23 between the vacuum (-tight) housing, guarantee that it has good closed performance, the external independent vacuum pump of vacuum pumping opening guarantees that reduced pressure sealing and middle pumping chamber place have enough vacuum tightness.
Usually the reduced pressure sealing cover is designed to opposite opened, namely from reduced pressure sealing cover center separately, with in order to can be conducive to the installation and removal of consumable electrode.
Accompanying drawing 4 is telescopic vacuum (-tight) housing graphite self-lubricating vacuum dynamic seal structural representation, in accompanying drawing 4: 18
Be dummy electrode, 29 are the porcelain plate folder, and 30 is telescopic dynamic seal upper flange, and 31 is flange seal ring, and 32 is the sealed graphite piece, and 33 is upper bush, and 34 is the sleeve seal circle, and 35 is lower sleeve, and 36 is crystallizer, and 28 is consumable electrode.By all joining with sealed between all parts of accompanying drawing 4 visible this kind dynamic seals, wherein: at telescopic dynamic seal upper flange 30 interior adding sealed graphite pieces, then rely on the porcelain plate folder 29 of porcelain plate that upper and lower surface the adds formation of telescopic dynamic seal upper flange 30, so that be able to effectively fixing between upper flange 30 and the sealed graphite piece 32, consider the loading and unloading of dummy electrode 18 and consumable electrode 28, sleeve can be divided into upper bush 33 and lower sleeve 35; Be equipped with flange seal ring 31 between telescopic dynamic seal upper flange 30 and the upper bush 33, be equipped with 34 sealings of sleeve seal circle between upper bush 33 and the lower sleeve 35, still rely on the sealing-ring sealing between lower sleeve 35 and the crystallizer 36, upper bush 33 and lower sleeve 35 can drop on the crystallizer 36 along below, lower sleeve 35 can slide among the upper bush 33 during landing.
Accompanying drawing 5 is slide sheet type bakelite vacuum dynamic seal structural representation, and in accompanying drawing 5: 18 is dummy electrode, and 37 are bakelite sealing slide plate, and 38 is spring, and 39 is slide sheet type dynamic seal upper flange, and 40 is vacuum (-tight) housing.41 is seal strip, and 28 is consumable electrode, and 42 is the crystallizer sealing-ring, and 36 is crystallizer.As shown in Figure 5, this kind dynamic seal is to be inlaid with bakelite sealing slide plate 37 in slide sheet type dynamic seal upper flange 39, slide sheet type dynamic seal upper flange 39 and have between the bakelite sealing slide plate 37 and be equipped with spring 38, under the support of spring 38, so that bakelite sealing slide plate 37 is with 18 close contacts of dummy electrode, be equipped with seal strip in the vacuum (-tight) housing 40, be equipped with crystallizer sealing-ring 42 between vacuum (-tight) housing and the crystallizer 36.
Accompanying drawing 6 is bellows-type vacuum seal structure schematic diagram, in accompanying drawing 6: 18 is dummy electrode, and 43 are the insulation compressing tablet, and 44 is bellows-type dynamic seal upper flange, 45 is the corrugated tube flange, 46 is corrugated tube, and 47 is vacuum (-tight) housing, and 48 is the bakelite diaphragm seal, 49 is sealing-ring, 28 is consumable electrode, and 42 is the crystallizer sealing-ring, and 36 is crystallizer.By accompanying drawing 6 as seen, bellows members has been adopted in the dynamic seal of this kind structure, still join with sealing means between each parts, wherein bellows-type dynamic seal upper flange 44 is embedded with bakelite diaphragm seal 48, two insulation compressing tablets 43 are clipped in bellows-type dynamic seal upper flange 44 and bakelite diaphragm seal 48 wherein, be added with sealing-ring 49 between bellows-type dynamic seal upper flange 44 and the corrugated tube flange 45, corrugated tube 46 is equipped with crystallizer sealing-ring 42 with seamless link between the vacuum (-tight) housing 47 between vacuum (-tight) housing 47 syncrystallization devices 36.
Can produce a certain amount of waste gas and dust because electroslag furnace is changed in the slag fusion process at it, in the vacuum system of this invention, be provided with 1 fly-ash separator 4 for this reason, usually select cyclone dust collector to be advisable; In order to guarantee the work safety of vacuum unit, also be provided with vacuum filter 7 and 9 in this vacuum system, purpose is to carry out secondary filtration and cooling for out waste gas in the fly-ash separator, makes it further to purify to reach the vacuum unit for the working standard of institute's air absorbing body.Usually have two types filter plant to select for the planner, the first is water-cooled bag-type dust strainer, and the second is the wire netting dust removal filter.
Electroslag furnace is smelted in the fusion-casting process and slight gas instantaneous expansion phenomenon occurred because of the misoperation meeting once in a while, the vacuum system of installing this invention has just formed a closed system through vacuumizing afterwards in the whole fusion process of electroslag furnace, in case the gas instantaneous expansion occurs as can not effectively being diffused venting of dust explosion, then probably want damage equipment, and harm operator's personnel safety, therefore in system, set up an explosion-proof equipment.This device as shown in Figure 7,50 is that inlet mouth, 51 is that explosion-proof valve body ring flange, 52 is that venting of dust explosion panel, 53 is that venting of dust explosion bolt, 54 is that venting of dust explosion spring, 55 is that explosion-proof valve body, 56 is the air outlet among the figure, wherein a plurality of have the single head venting of dust explosion bolt 53 of hold-doun nut to pass respectively venting of dust explosion spring 54 and venting of dust explosion panel 52, tighten and be fixed on the explosion-proof valve flange 51, this moment, venting of dust explosion spring 54 was in strained condition under the cramping of venting of dust explosion bolt 53 ground nuts and venting of dust explosion panel 52.Electroslag furnace when normal operation venting of dust explosion panel 52 is under the combined action of negative pressure that vacuum system produces and venting of dust explosion spring 54; tightly be attached on the explosion-proof valve flange 51; in case the gas instantaneous expansion occurs; surpassed the positive pressure that venting of dust explosion spring 54 produces; very large slit just appears between venting of dust explosion panel 52 and the explosion-proof valve body ring flange 51; high pressure gas overflow in the slit, and security of system has just obtained corresponding effectively protection.
According to aforesaid invention scheme, carried out implementation, what wherein fly-ash separator was selected is tornado dust collector, what the mode that connects with vacuum chamber was selected is decompression type vacuum dynamic seal device, select the wire netting dust removal filter as vacuum filter, the component that other components and parts are with vacuum performance consist of, comprise vacuum valve, vacuum pipe, vacuum instrumentation etc., debug, survey the vacuum system that forms is carried out admittance ability, effective pumping speed and the time of bleeding, satisfied the requirements of vacuum electric slag melting fully.
The vacuum system that this invention proposes can make vacuum electric slag hearth vacuum chamber be extracted into 100Pa in 30 minutes under zero load, reaches the vacuum electric slag hearth and begins melting pressure, and the unloaded final vacuum in the vacuum chamber can reach 1Pa.
The vacuum system that the present invention proposes can extract high temperature out, contain the pumped gas of dust, makes the normal operation of vacuum electric slag hearth, smelts high-quality metallurgic product.
According to the vacuum system of this invention application, because a plurality of vacuum valves and pipeline are arranged, can use according to actual needs, can single vacuum machine group job, also can 2 together operations of unit, can single vacuum filter work, also can work together.Can pass through filter bank, also can directly not vacuumize by filter bank.The long term operation of vacuum system energy, cost is low, and running expense is few, and is easy to operate, can realize energy-conserving and environment-protective.
The vacuum system that the present invention proposes can realize intelligent control, visualized operation, and far distance automatic monitoring guarantees the normal operation of vacuum electric melting.And have explosion-proof equipment and a function.
Vacuum electroslag remelting combines the advantage of electroslag furnace and consumable electrode vacuum furnace.The steel grade that can produce mainly contains: superior alloy steel, high-temperature alloy steel, Precise Alloy, non-corrosive metal also have the non-ferrous metal alloys such as aluminium, copper.
Claims (4)
1. electroslag furnace with vacuum system, it is characterized in that designed electroslag furnace vacuum system is the dynamic-seal vacuum chamber (1) by electroslag furnace, vacuum meter (2), explosion-proof equipment (3), fly-ash separator (4), the first to the 7th vacuum valve, the first vacuum filter (7) and the second vacuum filter (9), thermometer, the first and second vacuum units form, wherein the first and second vacuum units are separate, be parallel to together by pipeline through the 6th vacuum valve and the 7th vacuum valve separately from each other, then communicate with the first vacuum filter (7) and the second vacuum filter (9) that outlet pipe has been connected in parallel by the vacuum system pipeline, on the first vacuum filter (7) and the second vacuum filter (9) thermometer is housed respectively separately, and on the intake ducting of the first vacuum filter (7) the first vacuum valve is housed, the outlet pipe of the first vacuum filter (7) is equipped with the 4th vacuum valve, on the intake ducting of the second vacuum filter (9) the second vacuum valve is housed, the outlet pipe of the second vacuum filter (9) is equipped with the 5th vacuum valve, after being connected in parallel, the intake ducting of same the second vacuum filter (9) of the first vacuum filter (7) is connected with the escape pipe of fly-ash separator (4), the escape pipe of the inlet pipe of fly-ash separator (4) and explosion-proof equipment (3) is connected, explosion-proof equipment (3) is provided with vacuum meter (2), the inlet pipe of explosion-proof equipment (3) communicates with the dynamic-seal vacuum chamber (1) of electroslag furnace, the the first and second vacuum units that are connected in parallel also directly are connected by the escape pipe of the 3rd vacuum valve and the same fly-ash separator of pipeline (4)
Wherein, the dynamic sealing device of dynamic-seal vacuum chamber (1) refers to any one in following 4 kinds of dynamic sealing devices in the described electroslag furnace, wherein,
The decompression type vacuum dynamic seal, mainly by dummy electrode (18), planar sealing pad (19), reduced pressure sealing cover (20), middle pumping chamber (21), circumferential clasp (22), sealing-ring (23), vacuum (-tight) housing (24), outside relief groove (25), vacuum pumping opening (26), inboard relief groove (27) joins and is sealed to form, wherein, decompression type vacuum dynamic seal device is provided with planar sealing pad (19) and reduced pressure sealing cover (20) and outside relief groove (25) and inboard relief groove (27) in the outside of dummy electrode (18), utilizing circumferential clasp (22) that reduced pressure sealing cover (20) is pressed with the vacuum (-tight) housing (24) that links to each other with crystallizer is stuck, reduced pressure sealing cover (20) is with being added with sealing-ring (23) between the vacuum (-tight) housing, the external independent vacuum pump of vacuum pumping opening;
Telescopic vacuum (-tight) housing graphite self-lubricating vacuum dynamic seal, mainly by dummy electrode (18), porcelain plate folder (29), telescopic dynamic seal upper flange (30), flange seal ring (31), sealed graphite piece (32), upper bush (33), sleeve seal circle (34), lower sleeve (35), crystallizer (36) joins and is sealed to form, wherein, in telescopic dynamic seal upper flange (30), add the sealed graphite piece, then rely on the porcelain plate folder (29) of porcelain plate that upper and lower surface the adds formation of telescopic dynamic seal upper flange (30), so that be able to effectively fixing between upper flange (30) and the sealed graphite piece (32), be equipped with flange seal ring (31) between telescopic dynamic seal upper flange (30) and the upper bush (33), be equipped with sleeve seal circle (34) sealing between upper bush (33) and the lower sleeve (35), rely on the sealing-ring sealing between lower sleeve (35) and the crystallizer (36);
Slide sheet type bakelite vacuum dynamic seal, mainly by dummy electrode (18), bakelite sealing slide plate (37), spring (38), slide sheet type dynamic seal upper flange (39), vacuum (-tight) housing (40), seal strip (41), crystallizer sealing-ring (42), crystallizer (36) joins and is sealed to form, wherein, in slide sheet type dynamic seal upper flange (39), be inlaid with bakelite sealing slide plate (37), slide sheet type dynamic seal upper flange (39) and have between the bakelite sealing slide plate (37) and be equipped with spring (38), under the support of spring (38), so that close contact between the bakelite sealing same dummy electrode of slide plate (37) (18), vacuum (-tight) housing is equipped with seal strip in (40), is equipped with crystallizer sealing-ring (42) between vacuum (-tight) housing (40) and the crystallizer (36);
Bellows-type vacuum-sealing, mainly by dummy electrode (18), insulation compressing tablet (43), bellows-type dynamic seal upper flange (44), corrugated tube flange (45), corrugated tube (46), vacuum (-tight) housing (47), bakelite diaphragm seal (48), sealing-ring (49), crystallizer sealing-ring (42), crystallizer (36) joins and is sealed to form, wherein, bellows-type dynamic seal upper flange (44) is embedded with bakelite diaphragm seal (48), two insulation compressing tablets (43) are clipped in bellows-type dynamic seal upper flange (44) and bakelite diaphragm seal (48) wherein, be added with sealing-ring (49) between bellows-type dynamic seal upper flange (44) and the corrugated tube flange (45), seamless link between the same vacuum (-tight) housing of corrugated tube (46) (47), be equipped with crystallizer sealing-ring (42) between vacuum (-tight) housing (47) syncrystallization device (36)
Wherein, explosion-proof equipment in the described electroslag furnace in the vacuum system is by inlet mouth (50), explosion-proof valve flange (51), venting of dust explosion panel (52), venting of dust explosion bolt (53), venting of dust explosion spring (54), explosion-proof valve body (55), air outlet (56) forms, wherein, a plurality of have the single head venting of dust explosion bolt (53) of hold-doun nut to pass respectively venting of dust explosion spring (54) and venting of dust explosion panel (52), tighten and be fixed on the explosion-proof valve flange (51), venting of dust explosion spring (54) is in strained condition between the nut of venting of dust explosion bolt (53) and venting of dust explosion panel (52).
2. a kind of electroslag furnace with vacuum system according to claim 1 is characterized in that fly-ash separator (4) refers to cyclone dust collector in the described electroslag furnace vacuum system.
3. a kind of electroslag furnace with vacuum system according to claim 1 is characterized in that the first vacuum filter (7) and the second vacuum filter (9) refer to the wire netting dust removal filter in the described electroslag furnace vacuum system.
4. a kind of electroslag furnace with vacuum system according to claim 1, the inlet pipe that it is characterized in that wherein said explosion-proof equipment (3) communicate with the dynamic-seal vacuum chamber (1) of electroslag furnace and refer to that any one opening with the dynamic-seal vacuum chamber (1) of electroslag furnace is connected.
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| CN103602824B (en) * | 2013-11-26 | 2014-12-31 | 东北大学 | Electroslag remelting device and method based on rotating consumable electrode under vacuum environments |
| CN105950881B (en) * | 2016-06-13 | 2017-12-05 | 重庆钢铁(集团)有限责任公司 | A kind of electric slag refusion and smelting method |
| CN108118159B (en) * | 2017-11-21 | 2019-02-22 | 沈阳金正冶金技术有限公司 | A kind of novel consumable metallurgical furnace conductive material bar |
| CN112342401A (en) * | 2020-10-19 | 2021-02-09 | 东北大学 | Sealed petticoat pipe suitable for rotating electrode vacuum electroslag remelting technology |
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| CN201495269U (en) * | 2009-07-17 | 2010-06-02 | 廖大中 | Electroslag remelting furnace electrode and electroslag remelting furnace for smelting high nitrogen steels |
| CN202246802U (en) * | 2011-09-09 | 2012-05-30 | 沈阳东大兴科冶金技术有限公司 | Pressure-reduction-type dynamic seal vacuum electro-slag furnace |
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Effective date of registration: 20171017 Address after: 110004, No. 11, Lane 3, Wenhua Road, Heping District, Liaoning, Shenyang, 307B Patentee after: Shenyang Nintaus Metallurgical Technology Co., Ltd. Address before: 110004 No. 183, South five road, Heping District, Liaoning, Shenyang Patentee before: Shenyang Dongda Xingke Metallurgy Technology Co., Ltd. |