CN105091589A - Magnesium alloy gas protection smelting furnace for laboratory - Google Patents
Magnesium alloy gas protection smelting furnace for laboratory Download PDFInfo
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- CN105091589A CN105091589A CN201510501216.0A CN201510501216A CN105091589A CN 105091589 A CN105091589 A CN 105091589A CN 201510501216 A CN201510501216 A CN 201510501216A CN 105091589 A CN105091589 A CN 105091589A
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- magnesium alloy
- smelting furnace
- protective gas
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Abstract
The invention discloses a magnesium alloy gas protection smelting furnace for a laboratory. The smelting furnace has a furnace cover and a furnace shell, wherein the furnace shell has a hearth inside; a crucible is arranged in the hearth; an air curtain generation device for conveying protective gas to the surface of a magnesium alloy melt is arranged in a furnace port of the smelting furnace; a temperature control thermocouple, a protective gas input port and a heating electrode are mounted on the shell wall of the furnace shell; and the air curtain generation device is connected with an external protective gas input device through the protective gas input port. The air curtain generation device is integrally mounted at the top of the hearth in the furnace port, is positioned below a steel plate at the top of the furnace, and is manufactured by a metal pipe having a hole in the side surface. The hearth is a hearth with high heat conductivity and high density at the inner side. Aiming at insufficient consideration of magnesium alloy smelting features, more adoption of no gas protection and the modifying defects of an aluminum alloy smelting furnace with a porous ceramic hearth in a traditional magnesium alloy experimental furnace, the invention provides the gas protection smelting furnace with low cost and high reliability.
Description
Technical field
The invention belongs to metallurgical test equipment technical field, particularly a kind of use for laboratory magnesium alloy gas shield smelting furnace.
Background technology
Due to magnesium alloy have that density is little, specific strength is high, larger than elastic modelling quantity, good heat dissipation, damping property are high, the performance such as the corrosivity of large, the resistance to organic matter of the load-carrying ability that withstands shocks and alkali is good, in fields such as Aeronautics and Astronautics, transport, chemical industry, there is fine application prospect, therefore obtain the extensive research of Ge great institutes, research institution.But, due to experimental study comparatively industrial practice application small scale, fail so far to be the Mg alloy smelting furnace of magnesium alloy smelting correlative study exploitation specially.At present, the magnesium alloy research smelting furnace that Ge great institutes, research institution use is adopt conventional aluminum alloy research smelting furnace to do simple transformation to substitute mostly, can not meet the feature of magnesium alloy smelting.
In high temperature environments, chemism is extremely active for magnesium alloy.After contacting with oxygen; the surface of liquid magnesium or high-temperature solid magnesium is easy to produce one deck and loosens oxide-film; the generation of this oxide-film not only can not produce protective effect to fresh magnesium, but also provides passage for further magnesia melt or solid-state magnesium, exacerbates oxidation.。For magnesium solution, because magnesium alloy increasing air pressure is higher, easily produce magnesium steam on surface, magnesia liberated heat is assembled at oxidized surface, and ignite magnesium steam, can cause blast accident.The magnesium alloy blast accident in annual each laboratory emerges in an endless stream.Therefore, no matter from laboratory safety or from lifting laboratory magnesium alloy smelting quality, the protection to magnesium alloy solution surface should all be increased when Melting Magnesium alloy.
Current its burner hearth of use for laboratory Mg alloy smelting furnace is mostly porous alumina ceramic liner, its short texture, and intensity is not high.And mild steel or stainless steel material can be used in magnesium alloy smelting as crucible lining, its heavier-weight, and high at the degree of oxidation of fusion process, often can take out and clear up.Be difficult to avoid damaging or damaging burner hearth in taking-up process.In addition, unsound burner hearth also can cause protective gas to be revealed from burner hearth, increases protective gas consumption, and likely damages the electronic devices and components leaked outside in body of heater.
(application number: the magnesium-alloy smelting furnace 02136199.1) proposing a kind of multistage composite elite function is mainly used in the refining of magnesium alloy and old material reclaiming process to Chinese invention patent.Its structure is comparatively complicated, and be not also suitable for laboratory magnesium alloy smelting raw material mostly cleaner, without the need to carrying out the feature of high strength refining, especially construction cost is too high.
Chinese invention patent (the patent No.: ZL200510059000.x; ZL200610089498.9) a kind of vacuum smelting method and vacuum magnesium-alloy smelting furnace are proposed; propose after crucible top vacuumizes; the anti-protective gas being filled with finite concentration and pressure effectively can prevent the oxidation of magnesium alloy; its oxidation-protective effect is better; but vacuum and pressure-maintaining structure complexity, be not suitable for low cost laboratory research equally.Chinese utility model patent (CN102052838A; CN102052836A; ZL200620035018.6) it is characterized in that installing leakage detection probe additional bottom steel melting kettle; the leakage situation between steel crucibles and burner hearth gap is controlled by leakage detection probe; and open protective gas when leakage occurs, protection is carried out to its leakage and prevents its burning generation accident.
Chinese utility model patent (ZL200620102523.8) is characterized in that horizontally openable bell, and power frequency mode of heating etc., have typical commercial Application feature, discontented sufficient laboratory room small-sized, low cost application characteristic.The total closed type magnesium alloy vacuum smelting furnace that CN203286888U proposes, emphasizes that the magnetic couple under its totally-enclosed feature stirs.CN203848668U proposes a kind of building method of industrial magnesium alloys smelting furnace.
Foregoing invention or utility model are in refining, vacuum protection, leakage or open at bell; Melt Stirring in stove; even body of heater is built aspect by laying bricks or stones and is made improvement; but do not pay close attention to small-sized, easy-to-use, the feature that function is changeable of laboratory magnesium-alloy smelting furnace; making it when being applied to institute, research institution laboratory, using, maintenance cost is too high.So the said equipment almost cannot obtain application in laboratory.Therefore be necessary the feature for laboratory magnesium alloy smelting, adopt novel low-cost furnace binding, ensure the melting stability in magnesium alloy experimentation, security and the damage reduced periphery electronic devices and components.
Summary of the invention
The object of this invention is to provide a kind of use for laboratory magnesium alloy gas shield smelting furnace, solve the defect in laboratory applications of existing smelting furnace.
Technical scheme of the present invention is, a kind of use for laboratory magnesium alloy gas shield smelting furnace, and described smelting furnace has bell and furnace shell, has burner hearth in furnace shell, in burner hearth, be also provided with crucible,
The gas curtain generating means for protective gas being transported to magnesium alloy fused mass surface is also provided with at described smelting furnace fire door,
Described furnace shell shell wall is equiped with temperature-control heat couple, protective gas input port and heating electrode,
Described gas curtain generating means is connected with the protective gas input unit of outside by described protective gas input port.
Described gas curtain generating means is being positioned at the roof of the furnace of fire door by integrated installation, is in below furnace roof steel plate, is made up of lateral opening hole metal tube.
Described burner hearth is the high heat conduction high density burner hearth in inner side.
The present invention proposes a kind of magnesium alloy gas shield smelting furnace, comprise air curtain producing device in heating furnace, high heat conduction high density burner hearth, protective gas input unit, stove.Described inner side high heat conduction high density burner hearth is used for placing melting kettle therein, protective gas air curtain producing device is mounted with at its top, in fusion process, protective gas is evenly distributed on high density burner hearth inside by gas curtain, melting kettle top, thus protection magnesium alloy fused mass does not contact with oxygen; Inner side high density material can avoid protective gas to be permeated laterally by burner hearth simultaneously.Use the present invention can effectively avoid Melting Magnesium alloy to contact with oxygen, reduce the generation of melt oxidation, thus affect the magnesium alloy fused mass quality in experimentation.
The present invention is directed to existing magnesium alloy experimental furnace considers insufficient to magnesium alloy smelting feature, mostly adopts gas-protection-free, the deficiency of the aluminum alloy smelting furnace repacking of porous ceramics burner hearth, a kind of low cost provided, the gas shield smelting furnace of high reliability.
The present invention can be used for the relevant small gas protection stove of laboratory magnesium alloy smelting, for laboratory magnesium alloy smelting provides low cost, and high reliability; the gas shield of high security; thus it is low to obtain degree of oxidation, the high-quality magnesium alloy fused mass of high purity, for experimental reliability is given security.
Accompanying drawing explanation
Fig. 1 is front view and the top view of the bell open mode of use for laboratory magnesium alloy gas shield smelting furnace in the embodiment of the present invention.
Fig. 2 is the vertical section of use for laboratory magnesium alloy gas shield smelting furnace in the embodiment of the present invention.
Fig. 3 is electrode and the thermocouple face drawing in side sectional elevation of use for laboratory magnesium alloy gas shield smelting furnace in the embodiment of the present invention.
Fig. 4 is side view and the front view of use for laboratory magnesium alloy gas shield smelting furnace gas curtain generating means in the embodiment of the present invention.
Wherein, 1---bell, 2---gas curtain generating means, 3---high heat conduction high density burner hearth, 4---crucible, 5---furnace shell, 6---heating electrode, 7---temperature-control heat couple, 8---protective gas input port.
Detailed description of the invention
Use for laboratory magnesium alloy gas shield smelting furnace of the present invention, comprises air curtain producing device and protective gas input unit in heating furnace, high heat conduction high density burner hearth, stove.Described heating furnace by thermocouple temperature control, resistance heated, make burner hearth can stability contorting in a certain temperature; The heat that heating furnace produces can be delivered in burner hearth interior crucible by described high heat conduction high density burner hearth, also helps simultaneously and stops protective gas to enter furnace interior damage body of heater electronic devices and components; Described protective gas air curtain producing device is arranged on heating furnace top, can by the surface being transported to magnesium alloy fused mass stable for protective gas, and burner hearth other spaces inner; Described protective gas input unit is connected can mixes protective gas on request with protective gas air curtain producing device, and controls gas flow.
Air curtain producing device by integrated installation at roof of the furnace, below furnace roof steel plate, near fire door.Can by a lateral opening hole, or lateral opening metal tube is made, and its gas circuit entrance can be arranged on body of heater shell to be convenient to be connected with air transporting arrangement.Under certain input air pressure condition, gas can be evenly distributed to metal tube side opening or side opening and output in burner hearth and play gas shield effect.Protective gas can be that the gases such as CO2, SF6, C3F5H3, C3F6 are formed through dilution, mixing.
As Fig. 1-4, use for laboratory magnesium alloy gas shield smelting furnace comprises air curtain producing device in heating furnace, high heat conduction high density burner hearth, protective gas input unit, stove.The temperature-control heat couple temperature control that heating furnace is inserted by furnace shell, by resistance heated, make high heat conduction high density burner hearth can stability contorting in a certain temperature; And high heat conduction high density burner hearth is conducive to being delivered in burner hearth interior crucible by the heat that heating furnace produces and stoping protective gas to infiltrate furnace interior through burner hearth, damages electronic devices and components.Have a protective gas air curtain producing device at heating furnace top, this device by integrated installation at roof of the furnace, below furnace roof steel plate, near fire door.Can by a lateral opening hole, or lateral opening metal tube is made, and its gas circuit entrance can be arranged on furnace shell to be convenient to be connected with extraneous gas conveying device.Under certain input air pressure condition, gas can be evenly distributed to the surface that metal tube side opening or side opening output to the magnesium alloy fused mass in burner hearth, and burner hearth other spaces inner, protects magnesium alloy fused mass.This protective gas can be that the gases such as CO2, SF6, C3F5H3, C3F6 are formed through dilution, mixing.
Claims (3)
1. a use for laboratory magnesium alloy gas shield smelting furnace, is characterized in that, described smelting furnace has bell and furnace shell, has burner hearth in furnace shell, in burner hearth, be also provided with crucible,
The gas curtain generating means for protective gas being transported to magnesium alloy fused mass surface is also provided with at described smelting furnace fire door,
Described furnace shell shell wall is equiped with temperature-control heat couple, protective gas input port and heating electrode,
Described gas curtain generating means is connected with the protective gas input unit of outside by described protective gas input port.
2. use for laboratory magnesium alloy gas shield smelting furnace as claimed in claim 1, it is characterized in that, described gas curtain generating means is being positioned at the roof of the furnace of fire door by integrated installation, is in below furnace roof steel plate, is made up of lateral opening hole metal tube.
3. use for laboratory magnesium alloy gas shield smelting furnace as claimed in claim 1, is characterized in that, described burner hearth is the high heat conduction high density burner hearth in inner side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510501216.0A CN105091589A (en) | 2015-08-14 | 2015-08-14 | Magnesium alloy gas protection smelting furnace for laboratory |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510501216.0A CN105091589A (en) | 2015-08-14 | 2015-08-14 | Magnesium alloy gas protection smelting furnace for laboratory |
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| CN105091589A true CN105091589A (en) | 2015-11-25 |
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| CN201510501216.0A Pending CN105091589A (en) | 2015-08-14 | 2015-08-14 | Magnesium alloy gas protection smelting furnace for laboratory |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111121457A (en) * | 2019-12-25 | 2020-05-08 | 广东凤铝铝业有限公司 | Aluminum smelting device and heat treatment method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2566204Y (en) * | 2002-08-23 | 2003-08-13 | 清华大学 | Multifunctional magnesium alloy smelting device for experiment |
| CN2706729Y (en) * | 2004-06-09 | 2005-06-29 | 重庆工学院 | Well type resistance furnace body for Mg alloy heat treatment experiment |
| JP2006334610A (en) * | 2005-05-31 | 2006-12-14 | Toyota Motor Corp | Method for preventing combustion of molten metal, method for producing casting, and magnesium alloy casting |
| CN201990717U (en) * | 2011-01-11 | 2011-09-28 | 盐城工学院 | Experimental magnesium alloy and composite preparation equipment |
| CN204286085U (en) * | 2014-12-11 | 2015-04-22 | 西安建筑科技大学 | A kind of visual can the Mg-based hydrogen storage smelting furnace of the salable insulation of freely openable |
| CN204373418U (en) * | 2014-12-25 | 2015-06-03 | 鄂州市金刚石技术研发中心 | The compound air curtain device of a kind of intermediate frequency furnace |
| CN205048978U (en) * | 2015-08-14 | 2016-02-24 | 共慧冶金设备科技(苏州)有限公司 | Laboratory is with magnesium alloy gas protection smelting furnace |
-
2015
- 2015-08-14 CN CN201510501216.0A patent/CN105091589A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2566204Y (en) * | 2002-08-23 | 2003-08-13 | 清华大学 | Multifunctional magnesium alloy smelting device for experiment |
| CN2706729Y (en) * | 2004-06-09 | 2005-06-29 | 重庆工学院 | Well type resistance furnace body for Mg alloy heat treatment experiment |
| JP2006334610A (en) * | 2005-05-31 | 2006-12-14 | Toyota Motor Corp | Method for preventing combustion of molten metal, method for producing casting, and magnesium alloy casting |
| CN201990717U (en) * | 2011-01-11 | 2011-09-28 | 盐城工学院 | Experimental magnesium alloy and composite preparation equipment |
| CN204286085U (en) * | 2014-12-11 | 2015-04-22 | 西安建筑科技大学 | A kind of visual can the Mg-based hydrogen storage smelting furnace of the salable insulation of freely openable |
| CN204373418U (en) * | 2014-12-25 | 2015-06-03 | 鄂州市金刚石技术研发中心 | The compound air curtain device of a kind of intermediate frequency furnace |
| CN205048978U (en) * | 2015-08-14 | 2016-02-24 | 共慧冶金设备科技(苏州)有限公司 | Laboratory is with magnesium alloy gas protection smelting furnace |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111121457A (en) * | 2019-12-25 | 2020-05-08 | 广东凤铝铝业有限公司 | Aluminum smelting device and heat treatment method thereof |
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Application publication date: 20151125 |
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