CN113249587B - Combined condensation cover for smelting titanium alloy in EB (Electron Beam) furnace - Google Patents
Combined condensation cover for smelting titanium alloy in EB (Electron Beam) furnace Download PDFInfo
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- CN113249587B CN113249587B CN202110303257.4A CN202110303257A CN113249587B CN 113249587 B CN113249587 B CN 113249587B CN 202110303257 A CN202110303257 A CN 202110303257A CN 113249587 B CN113249587 B CN 113249587B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/22—Remelting metals with heating by wave energy or particle radiation
- C22B9/228—Remelting metals with heating by wave energy or particle radiation by particle radiation, e.g. electron beams
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/10—Obtaining titanium, zirconium or hafnium
- C22B34/12—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08
- C22B34/1295—Refining, melting, remelting, working up of titanium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C14/00—Alloys based on titanium
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Abstract
The utility model provides a combination formula condensation cover for EB stove smelts titanium alloy, including high temperature resistant steel structure frame and casing board, high temperature resistant steel structure frame is the three-dimensional cavity frame construction that constitutes through steel pipe and/or steel sheet combination, the inboard surface of casing board subsides establishing at high temperature resistant steel structure frame, a plurality of titanium metal pieces are installed at the interval on the internal surface of casing board, make the condensate can attach to the internal surface of casing board and the surface of titanium metal piece simultaneously, the titanium metal piece can be kept apart into the small-size condensate with original jumbo size condensate, reduce the adverse effect of expend with heat and contract with cold effect to the condensate, and certain gap can necessarily exist between titanium metal piece and the casing board, also can embed to the gap in the condensate growth process, make the condensate can firmly attach to the condensation cover inner wall, and several times improve the condensate weight limit that the condensation cover can bear, improve the condensate problem that drops by a wide margin, avoid component segregation and the risk that leads to from this, improve ingot casting quality, equipment smelting time and output.
Description
Technical Field
The invention relates to the field of condensation hoods for EB (Electron beam) furnaces, in particular to a combined condensation hood for smelting titanium alloy in the EB furnace.
Background
An electron beam cold bed smelting furnace, called EB furnace for short, is characterized in that under a vacuum environment, a high-voltage electric field is utilized to accelerate a thermal electron beam emitted by a cathode block and bombard metal to be melted, kinetic energy of electrons is converted into heat energy to be used as a heat source, and the metal is melted into an ingot. Compared with the traditional blank making process method of 'VAR repeated smelting and forging', the EB smelting process has high vacuum degree, large superheat degree of molten metal and good refining and purification effects, and can effectively remove high-density and low-density impurities; bulk materials can be charged into a furnace for smelting, the raw materials have strong applicability, and the method is very suitable for smelting and recycling titanium residues; in addition, the EB smelting can produce a flat ingot and a special-shaped section ingot blank for direct rolling at one time, solves the problems that the traditional VAR smelting can only produce a round ingot and needs to smelt for multiple times and forge for multiple times to manufacture the flat ingot and the special-shaped section ingot blank, and has the advantages of obvious short flow, low cost, high quality and wide application prospect.
However, because the EB furnace is high in smelting vacuum degree and large in superheat degree of metal melt, titanium metal, alloy elements and impurity elements are volatilized and spattered to lose a lot in the process of smelting titanium alloy by utilizing the EB furnace, a large amount of volatile matters are condensed and then attached to a condensation cover to form a condensate, when the EB furnace is not provided with the condensation cover, the condensate is generally attached to the interior of a smelting chamber, and the loss accounts for the proportion of smelting raw materials up to 2~8%. In order to collect condensate, a condensation cover is usually arranged in a smelting chamber of the EB furnace (namely the condensation cover is arranged above a smelting and refining cold bed and a crystallizer), so that the problem that the condensate is difficult to clean due to the fact that a large amount of condensate is attached to the smelting chamber can be avoided, meanwhile, after the smelting period is finished, the time for cleaning the furnace is greatly saved by replacing a condensation cover shell, the smelting capacity of equipment is improved, and in addition, the condensation cover has a heat preservation beneficial effect on a molten pool. Different from pure titanium, the titanium alloy generally contains alloy elements such as low melting point and high saturated vapor pressure Al, the melting temperature of Al and Ti is 1000 ℃, and the saturated vapor pressure is several times different, so that the formation rate and weight of condensate are several times of those of pure titanium in the melting process of titanium alloy EB, and the condensate is different from the furnace wall or a condensation cover lining plate in cold and hot expansion coefficients and is not firmly combined, so that under the actions of thermal expansion and cold contraction and gravity, when the gravity of the condensate is greater than the binding force with a contact interface, the condensate is easy to fall into a cooling bed or a melt, and the condensate is rich in alloy elements such as Al, O, N, C and the like and impurity elements, so that the quality of cast ingots is influenced. In addition, because the condensate forming speed in the titanium alloy EB smelting process is high, in order to reduce the influence of the condensate on the ingot casting quality, the internal yield of the smelting period needs to be greatly reduced, the blow-in and blow-out frequency is increased, and the blow-in and blow-out needs 1~3 days, so that the equipment productivity is seriously influenced.
Disclosure of Invention
The invention aims to provide a combined condensing hood for smelting titanium alloy in an EB (electron beam) furnace, which solves the problem of falling of condensate in the titanium alloy smelting process of the EB furnace, greatly prolongs the furnace cleaning period, improves the titanium alloy yield in one smelting period, and has remarkable quality advantages and economic benefits.
The technical scheme adopted by the invention for solving the technical problems is as follows: a combined condensing hood for smelting titanium alloy in an EB (electron beam) furnace comprises a high-temperature-resistant steel structure frame and a shell plate, wherein the high-temperature-resistant steel structure frame is a three-dimensional hollow frame structure formed by combining steel pipes and/or steel plates, the shell plate is attached to the inner side surface of the high-temperature-resistant steel structure frame, the top surface and the side surface of the high-temperature-resistant steel structure frame are sealed through the shell plate, so that a condensing hood shell with an opening structure at the bottom surface is formed, a plurality of titanium metal blocks are mounted on the inner surface of the shell plate at intervals, condensate can be attached to the inner surface of the shell plate and the surfaces of the titanium metal blocks at the same time, the distance between every two adjacent titanium metal blocks on the top surface in the length direction of the high-temperature-resistant steel structure frame is not more than 100mm, and the distance in the width direction of the high-temperature-resistant steel structure frame is not more than 150mm; the distance between two adjacent titanium metal blocks on the side surface along the length direction or the width direction of the high-temperature-resistant steel structure frame is not more than 150mm, and the distance along the height direction of the high-temperature-resistant steel structure frame is not more than 250mm.
Preferably, the titanium metal block is rectangular in shape.
Preferably, the size specification of the length multiplied by the width multiplied by the height of the titanium metal block is not less than 50mm multiplied by 50mm.
Preferably, the titanium metal block is arranged on the inner surface of the shell plate through a plate type pin assembly or a tubular type pin assembly;
the plate-type pin component comprises a pin, a blocking piece and a spring pin, the pin penetrates through the shell plate, one end, located inside the condensation cover, of the pin is connected with the titanium metal block through threads so as to limit the radial displacement of the titanium metal block along the pin, one end, located outside the condensation cover, of the pin penetrates through the blocking piece, the surface, close to one side of the condensation cover, of the blocking piece is pressed on a steel pipe or a steel plate of the high-temperature-resistant steel structure frame, and the spring pin penetrates through the pin and is clamped on the surface, far away from the condensation cover, of the blocking piece so as to limit the axial displacement of the titanium metal block along the pin;
tubular pin subassembly includes pin, registration arm and spring catch, and the pin runs through the casing board and the pin is located the inside one end of condensation cover and passes through the screw thread to be connected with the titanium metal piece to restriction titanium metal piece is along the radial displacement of pin, and the pin is located the outside one end of condensation cover and runs through the hole of registration arm, the lateral wall of registration arm and high temperature resistant steel construction frame's steel pipe or steel sheet fixed connection, the spring catch is worn to establish on the pin and is blocked the tip of establishing the registration arm and keeping away from condensation cover one side, with restriction titanium metal piece along the axial displacement of pin.
Preferably, one titanium metal block is in threaded connection with the two pins at the same time, and the two pins connected with the same titanium metal block penetrate through the same blocking piece.
Preferably, the plurality of titanium metal blocks positioned on the top surface of the high-temperature-resistant steel structural frame are all installed through the plate type pin component.
Preferably, the plurality of titanium metal blocks positioned on the side surface of the high-temperature-resistant steel structural frame are respectively installed through plate type pin assemblies or tubular pin assemblies.
Preferably, the shell plate is of a split structure and is formed by splicing a plurality of split titanium plates with the thickness of 1 mm-3 mm.
Preferably, the shell plate is provided with a feeding hole, an observation hole and a sampling port.
According to the technical scheme, the invention has the beneficial effects that:
1. according to the invention, the titanium metal blocks are arranged on the inner surface of the shell plate at intervals, so that condensate can be attached to the inner surface of the shell plate and the surface of the titanium metal blocks at the same time, the titanium metal blocks can isolate the original large-size condensate into small-size condensate, the adverse effect of the thermal expansion and cold contraction on the condensate is reduced, a certain gap is inevitably formed between the titanium metal blocks and the shell plate, the condensate can be embedded into the gap in the growth process, so that the condensate can be firmly attached to the inner wall of the condensation cover, most weight of the condensate is borne by the high-temperature-resistant steel structure frame with higher strength and rigidity, the weight of the condensate acting on the shell plate is greatly reduced, the attachment surface of the condensate on the inner side of the condensation cover is smooth, and the phenomenon of turning-up or peeling-off is avoided.
2. The condensation cover can firmly fix the condensate and improve the weight limit of the condensate, so the smelting period can be effectively prolonged, and the titanium alloy yield in one smelting period can be obviously improved.
3. According to the invention, in the process of blowing in and cleaning the furnace after the smelting period is finished, the condensation cover can be integrally lifted away and replaced by a cleaned reusable spare part condensation cover, the condensation cover can be reused, the replacement is simple and convenient during cleaning the furnace, the furnace cleaning time is shortened, and the smelting time and the yield of the equipment are improved.
4. The invention can effectively prolong the smelting period, remarkably improve the smelting time of the EB furnace and the yield of the titanium alloy, reduce the depreciation of equipment and the uniform spreading of personnel cost, and the condensation cover can be repeatedly used, thereby greatly reducing the production cost of the titanium alloy of the EB furnace, and improving the output value and the economic benefit.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a schematic view of the inside surface of the top housing panel;
FIG. 3 is an enlarged view of a portion of the plate pin assembly at A;
FIG. 4 is a schematic cross-sectional view of FIG. 3;
FIG. 5 is an enlarged partial view of the tubular pin assembly at B;
fig. 6 is a schematic cross-sectional view of fig. 5.
The mark in the figure is: 1. the device comprises a high-temperature-resistant steel structure frame, 2, a shell plate, 3, a titanium metal block, 4, a pin, 5, a blocking piece, 6, a spring pin, 7, a positioning pipe, 8, a feeding hole, 9, an observation hole, 10 and a sampling port.
Detailed Description
Referring to the drawings, the specific embodiments are as follows:
the utility model provides a combination formula condensation cover for EB stove smelts titanium alloy, including high temperature resistant steel structure frame 1 and casing board 2, high temperature resistant steel structure frame 1 is the three-dimensional cavity frame construction that constitutes through steel pipe and/or steel sheet combination, casing board 2 is split type structure, the components of a whole that can function independently titanium plate concatenation by a plurality of thickness 1mm ~ 3mm forms, casing board 2 pastes the inboard surface of establishing at high temperature resistant steel structure frame 1, seal the top surface and the side of high temperature resistant steel structure frame 1 through casing board 2, thereby constitute bottom surface open structure's condensation cover shell, feed port 8 has been seted up on casing board 2, observe hole 9 and sample connection 10.
A plurality of titanium metal blocks 3 are arranged on the inner surface of the shell plate 2 at intervals, so that condensate can be attached to the inner surface of the shell plate 2 and the surface of the titanium metal blocks 3 at the same time, the shape of the titanium metal blocks 3 is a rectangular body, and the dimension specification of the length, the width and the height of the titanium metal blocks 3 is not less than 50mm, 50mm and 50mm.
The distance between two adjacent titanium metal blocks 3 positioned on the top surface along the length direction of the high-temperature-resistant steel structure frame 1 is not more than 100mm, and the distance along the width direction of the high-temperature-resistant steel structure frame 1 is not more than 150mm; the distance between two adjacent titanium metal blocks 3 on the side surface along the length direction or the width direction of the high-temperature-resistant steel structure frame 1 is not more than 150mm, and the distance along the height direction of the high-temperature-resistant steel structure frame 1 is not more than 250mm.
The titanium metal blocks 3 are installed on the inner surface of the shell plate 2 through plate type pin assemblies or tubular pin assemblies, the titanium metal blocks 3 located on the top surface of the high temperature resistant steel structural frame 1 are all installed through the plate type pin assemblies, and the titanium metal blocks 3 located on the side surface of the high temperature resistant steel structural frame 1 are installed through the plate type pin assemblies or the tubular pin assemblies respectively.
Plate-type pin subassembly includes pin 4, separation blade 5 and spring catch 6, pin 4 runs through casing board 2 and pin 4 and is located the inside one end of condensation cover and passes through the screw thread and be connected with titanium metal piece 3, in order to restrict titanium metal piece 3 along the radial displacement of pin 4, pin 4 is located the outside one end of condensation cover and runs through separation blade 5, separation blade 5 is close to the surface pressure of condensation cover one side and is established on high temperature resistant steel structural framework 1's steel pipe or steel sheet, spring catch 6 is worn to establish on pin 4 and the card establishes the surface that separation blade 5 kept away from condensation cover one side, in order to restrict titanium metal piece 3 along the axial displacement of pin 4.
Tubular pin subassembly includes pin 4, registration arm 7 and spring catch 6, pin 4 runs through casing board 2 and pin 4 and is located the inside one end of condensation cover and passes through the screw thread and be connected with titanium metal piece 3, with restriction titanium metal piece 3 along the radial displacement of pin 4, pin 4 is located the hole that registration arm 7 is run through to the outside one end of condensation cover, the lateral wall of registration arm 7 and high temperature resistant steel structural framework 1's steel pipe or steel sheet fixed connection, spring catch 6 wears to establish on pin 4 and the tip that registration arm 7 kept away from condensation cover one side is established to the card, with restriction titanium metal piece 3 along the axial displacement of pin 4.
The condensation cover is adopted to carry out TC4 (namely Ti-6 Al-4V) titanium alloy EB smelting, and the TC4 titanium alloy is rich in 6 mass percent of volatile Al element with low melting point and high saturated vapor pressure, so compared with pure titanium smelting, condensate is produced quickly in the smelting process, but the condensation cover can firmly fix the condensate and obviously improve the weight limit of the bearing condensate, so that the problem that the condensate falls off in the titanium alloy smelting process of the EB furnace can be greatly improved, the smelting period can be effectively prolonged, and the titanium alloy yield is improved. Use this patent condensation cover, 60 tons TC4 slabs can be smelted to a smelting cycle, and the condensate that does not influence the ingot casting quality drops among the smelting process.
Comparative example 1: a condensation cover is not used in the process of smelting TC4 in an EB (Electron Beam) furnace, a large amount of volatile matters generated in the smelting process are condensed at the top and the side wall of a smelting chamber to form condensate, cooling water is introduced into the inner wall of the smelting chamber, the condensate layer is easy to crack and warp under the strong chilling action, the inner wall is smooth, the binding force with the condensate is poor, and when the smelting is carried out to 6 tons under the composite action of gravity, heat radiation and inner wall chilling, the flaky condensate falls into a molten pool; when the smelting is carried out to 10 tons, the dropping frequency and the volume of condensate are greatly increased, the smelting is carried out after the furnace is opened and the furnace is cleared, and the yield of TC4 titanium alloy in one smelting period is only 10 tons.
Comparative example 2: a condensation cover is used in the process of smelting TC4 in the EB furnace, the inner wall of the condensation cover is a planar lining plate, and condensation dense pins or other devices are not fixed. Although the lining plate on the inner wall of the condensation cover is not provided with a cooling water channel and has a certain temperature under the action of heat radiation of a molten pool, the inner wall of the condensation cover is not provided with a condensate fixing device, so that the bonding force with the condensate is weaker, and the condensate is easy to drop in the smelting process. When smelting is carried out to 8 tons, a small amount of lamellar condensate begins to drop to a cooling bed molten pool, when smelting is carried out to 16 tons, the dropping frequency and the dropping volume of the condensate are greatly increased, smelting is carried out after opening and cleaning a furnace, and the output of TC4 titanium alloy in one smelting period is 16 tons.
Compared with the comparison of a comparative example 1 and a comparative example 2, the condensation cover disclosed by the invention is adopted for smelting TC4 titanium alloy EB, so that the problem that condensate falls in the process of smelting titanium alloy in an EB furnace can be greatly improved, and compared with EB smelting without the condensation cover, the yield of TC4 titanium alloy in one period is increased from 10 tons to 60 tons, and the yield is increased by 6 times; compared with a condensation cover without fixed condensate dense pins or other devices, the method has the advantages that the yield of the TC4 titanium alloy is improved from 16 tons to 60 tons within one period, the yield is improved by 3.8 times, the quality and the yield of cast ingots are improved, and the quality and the economic benefit are obvious.
Claims (8)
1. The utility model provides a combination formula condensation cover for EB stove is smelted titanium alloy, includes high temperature resistant steel structure frame (1) and casing board (2), high temperature resistant steel structure frame (1) is the three-dimensional cavity frame construction that constitutes through steel pipe and/or steel sheet combination, casing board (2) are pasted and are established at the inboard surface of high temperature resistant steel structure frame (1), seal the top surface and the side of high temperature resistant steel structure frame (1) through casing board (2) to constitute bottom surface open structure's condensation cover shell, its characterized in that: the inner surface of the shell plate (2) is provided with a plurality of titanium metal blocks (3) at intervals, condensate can be attached to the inner surface of the shell plate (2) and the surfaces of the titanium metal blocks (3) at the same time, the distance between every two adjacent titanium metal blocks (3) on the top surface along the length direction of the high-temperature-resistant steel structural frame (1) is not more than 100mm, and the distance along the width direction of the high-temperature-resistant steel structural frame (1) is not more than 150mm; the distance between two adjacent titanium metal blocks (3) positioned on the side surface along the length direction or the width direction of the high-temperature-resistant steel structure frame (1) is not more than 150mm, and the distance along the height direction of the high-temperature-resistant steel structure frame (1) is not more than 250mm;
the titanium metal block (3) is arranged on the inner surface of the shell plate (2) through a plate type pin component or a tubular pin component;
the plate-type pin assembly comprises a pin (4), a blocking piece (5) and a spring pin (6), wherein the pin (4) penetrates through the shell plate (2), one end, located inside the condensation cover, of the pin (4) is connected with the titanium metal block (3) through threads, so that radial displacement of the titanium metal block (3) along the pin (4) is limited, one end, located outside the condensation cover, of the pin (4) penetrates through the blocking piece (5), the surface, close to one side of the condensation cover, of the blocking piece (5) is pressed on a steel pipe or a steel plate of the high-temperature-resistant steel structure frame (1), the spring pin (6) penetrates through the pin (4), is clamped on the surface, far away from one side of the condensation cover, of the blocking piece (5), and is used for limiting axial displacement of the titanium metal block (3) along the pin (4);
tubular pin subassembly includes pin (4), registration arm (7) and spring catch (6), pin (4) run through casing board (2) and pin (4) are located the inside one end of condensation cover and are passed through the screw thread and are connected with titanium metal block (3), in order to restrict titanium metal block (3) along the radial displacement of pin (4), pin (4) are located the outside one end of condensation cover and run through the hole of registration arm (7), the lateral wall of registration arm (7) and the steel pipe or the steel sheet fixed connection of high temperature resistant steel structural framework (1), spring catch (6) are worn to establish on pin (4) and are blocked and establish the tip that condenser cover one side was kept away from to registration arm (7), in order to restrict titanium metal block (3) along pin (4) axial displacement.
2. The combined type condensation cover for smelting titanium alloy in the EB furnace, according to claim 1, is characterized in that: the titanium metal block (3) is rectangular in shape.
3. The combined type condensation cover for smelting titanium alloy in the EB furnace, according to claim 2, is characterized in that: the size specification of the length, the width and the height of the titanium metal block (3) is not less than 50mm, 50mm and 50mm.
4. The combined type condensation cover for smelting titanium alloy in the EB furnace, according to claim 1, is characterized in that: one titanium metal block (3) is connected with the two pins (4) through threads at the same time, and the two pins (4) connected with the same titanium metal block (3) penetrate through the same baffle plate (5).
5. The combined type condensation cover for smelting titanium alloy in the EB furnace, according to claim 1, is characterized in that: the plurality of titanium metal blocks (3) positioned on the top surface of the high-temperature-resistant steel structure frame (1) are all installed through plate-type pin components.
6. The combined type condensation cover for smelting titanium alloy in the EB furnace, according to claim 1, is characterized in that: the plurality of titanium metal blocks (3) positioned on the side surface of the high-temperature-resistant steel structure frame (1) are respectively installed through plate type pin assemblies or tubular pin assemblies.
7. The combined type condensation cover for smelting titanium alloy in the EB furnace, according to claim 1, is characterized in that: the shell plate (2) is of a split structure and is formed by splicing a plurality of split titanium plates with the thickness of 1-3 mm.
8. The combined type condensation cover for smelting titanium alloy in the EB furnace, according to claim 1, is characterized in that: the shell plate (2) is provided with a feeding hole (8), an observation hole (9) and a sampling port (10).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110303257.4A CN113249587B (en) | 2021-03-22 | 2021-03-22 | Combined condensation cover for smelting titanium alloy in EB (Electron Beam) furnace |
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| CN202110303257.4A CN113249587B (en) | 2021-03-22 | 2021-03-22 | Combined condensation cover for smelting titanium alloy in EB (Electron Beam) furnace |
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| EP0900854A1 (en) * | 1997-09-04 | 1999-03-10 | Titanium Hearth Technologies, Inc. | Condensate retention arrangement for cold hearth refining |
| WO2006080269A1 (en) * | 2005-01-25 | 2006-08-03 | Toho Titanium Co., Ltd. | Apparatus for melting metal by electron beams and process for producing high-melting metal ingot using this apparatus |
| CN101147037A (en) * | 2005-01-25 | 2008-03-19 | 东邦钛株式会社 | Apparatus for melting metal by electron beams and process for producing high-melting metal ingot using this apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| UA21807C2 (en) * | 1996-05-17 | 2000-09-15 | Юнайтед Технолоджіз Корп. Пратт Енд Уітні | Method for high-speed vacuum evaporation of metals and alloys with the use of intermediary bath |
| CN201864763U (en) * | 2010-11-16 | 2011-06-15 | 重庆大学 | Vacuum thermal reduction device |
| CN202391904U (en) * | 2011-11-14 | 2012-08-22 | 云南钛业股份有限公司 | Novel titanium and titanium alloy condensing screen locking device |
| CN103093929B (en) * | 2013-01-27 | 2015-10-28 | 大连世有电力科技有限公司 | The condensing cover of transformer breather |
| CN203830036U (en) * | 2014-04-25 | 2014-09-17 | 宁波仁汇医疗器械有限公司 | Reaction flask with condensation function |
| CN105177329B (en) * | 2015-09-07 | 2017-04-05 | 云南钛业股份有限公司 | The method that a kind of electron-beam cold bed furnace working chamber condensate is quickly reclaimed |
| CN208785793U (en) * | 2018-06-20 | 2019-04-26 | 天津市科密欧化学试剂有限公司 | A kind of distilation device of metallic compound production |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0900854A1 (en) * | 1997-09-04 | 1999-03-10 | Titanium Hearth Technologies, Inc. | Condensate retention arrangement for cold hearth refining |
| WO2006080269A1 (en) * | 2005-01-25 | 2006-08-03 | Toho Titanium Co., Ltd. | Apparatus for melting metal by electron beams and process for producing high-melting metal ingot using this apparatus |
| CN101147037A (en) * | 2005-01-25 | 2008-03-19 | 东邦钛株式会社 | Apparatus for melting metal by electron beams and process for producing high-melting metal ingot using this apparatus |
| CN102175077A (en) * | 2005-01-25 | 2011-09-07 | 东邦钛株式会社 | Apparatus for melting metal by electron beams and process for producing high-melting metal ingot using this apparatus |
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