CN102914175A - Molten metal stirring method - Google Patents
Molten metal stirring method Download PDFInfo
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- CN102914175A CN102914175A CN2012104646381A CN201210464638A CN102914175A CN 102914175 A CN102914175 A CN 102914175A CN 2012104646381 A CN2012104646381 A CN 2012104646381A CN 201210464638 A CN201210464638 A CN 201210464638A CN 102914175 A CN102914175 A CN 102914175A
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Abstract
This invention discloses a molten metal stirring method which comprises the following steps that: a molten metal is introduced into a furnace body in an eddy flow mode, the molten metal entering the furnace body forms a molten metal bath, and the molten metal on the surface of the molten metal bath forms an eddy flow; a periodically-changed magnetic field is formed at the periphery of the furnace body, an electromagnetic effect is generated among the magnetic field, the eddy flow and the molten metal bath, and a volute electromagnetic force generated in the molten metal bath promotes the molten metal in the molten metal bath to continue to move; and a scheduled time later, the molten metal is led out of the bottom of the furnace body. According to the molten metal stirring method disclosed by the invention, an eddy flow is manufactured by using the gravity of the molten metal, so that when entering the furnace body, the molten metal has a certain speed and can be formed into an eddy flow. The invention also provides a rotatablely-changed magnetic field, an induced current is generated in the eddy flow of the molten metal by using an electromagnetic principle, and then an electromagnetic force is formed by using the induced current, so that the eddy flow of the molten metal can be sustained. The stirring of the molten metal is realized through the eddy flow.
Description
Technical field
The present invention relates to metallurgical technology field, relate in particular to a kind of self gravitation of molten metal and method that electromagnetic principle stirs molten metal utilized.
Background technology
In field of metallurgy, the deposite metal is very general and important technique.Metal after the fusing can be used in the metal parts of the various moulding of casting.In the process of metal molten and casting, the uniformity of molten metal will determine the product quality of subsequent technique.Because the fusing point of metal is high, density is large, and difficulty reaches evenly when the conveying of fusing, can cause the part material fusing insufficient, produces the phenomenon of condensing when perhaps carrying.In order to address this problem, need to stir molten metal, to improve the uniformity of molten metal.
Mixing plant of the prior art normally utilizes mechanical agitation, namely stretches in the molten metal with mechanical device and stirs.Mechanical agitation affects the purity of molten metal easily owing to mechanical device need to be stretched in the molten metal.Another kind of mixer means is vacuum stirring, although less on the purity impact of molten metal, the vacuum stirring cost is high, and the mixing power that produces is inadequate.
Summary of the invention
The present invention is intended to propose a kind of the employing in conjunction with the stirring means that adopts molten metal self gravitation and electromagnetic force.
According to one embodiment of the invention, a kind of stirring means of molten metal is proposed, comprise following step: molten metal is introduced in the body of heater in the eddy current mode, and the molten metal that enters body of heater forms liquid-bath, and the molten metal on liquid-bath surface forms eddy current; Form the cycle changing magnetic field in the body of heater periphery, magnetic field and eddy current and liquid-bath produce galvanomagnetic-effect, and the molten metal that produces in liquid-bath in the vortex electromagnetic force promotion liquid-bath continues mobile; Through after the scheduled time, molten metal is derived by the bottom of body of heater.
In one embodiment, molten metal entered in the eddy current mode comprise in the body of heater that the guide wire liquation is through the eddy flow inducting device, the eddy flow inducting device is cylindrical, the surface of eddy flow inducting device has helicla flute, molten metal enters from the helicla flute entrance that is positioned at eddy flow inducting device top, flow out from the spiral fluted outlet that is positioned at eddy flow inducting device bottom via helicla flute, in body of heater, form eddy current through the spiral fluted molten metal.Body of heater is cylindrical, and the molten metal of process eddy flow inducting device forms eddy current in the circular arc wall of body of heater.
In one embodiment, form the cycle changing magnetic field in the body of heater periphery and be included in the periphery setting of body of heater around the rotating excitation field generator of body of heater rotation.The rotating excitation field generator comprises the permanent magnet of two semicircle annulars, is enclosed in the periphery of body of heater, and two permanent magnets rotate around the periphery of body of heater.The height of permanent magnet cover liquid-bath height at least half.
In one embodiment, the rotating excitation field generator at the uniform velocity rotates around body of heater, molten metal is derived by the bottom of body of heater after rotating for two weeks.
The stirring means of molten metal of the present invention utilizes the self gravitation of molten metal to make eddy current, and molten metal possesses certain speed when entering into body of heater can form eddy current.The present invention also provides the rotation changing magnetic field, utilizes electromagnetic principle so that produce induced-current in the molten metal eddy current, and the recycling induced-current forms electromagnetic force, so that the eddy current of molten metal can continue.Realize the stirring of molten metal by eddy current.
Description of drawings
Fig. 1 has disclosed the flow chart according to the stirring means of the molten metal of one embodiment of the invention.
Fig. 2 and Fig. 3 have disclosed according to the process of the stirring means of the molten metal of one embodiment of the invention and principle.
The specific embodiment
At first with reference to shown in Figure 1, the present invention has disclosed a kind of stirring means 100 of molten metal, and the method comprises following step:
102. molten metal is introduced in the body of heater in the eddy current mode, and the molten metal that enters body of heater forms liquid-bath, the molten metal on liquid-bath surface forms eddy current.In one embodiment, step 102 with molten metal take the eddy current mode enter in the body of heater implementation as the guide wire liquation through the eddy flow inducting device, the eddy flow inducting device is cylindrical, the surface of eddy flow inducting device has helicla flute, molten metal enters from the helicla flute entrance that is positioned at eddy flow inducting device top, flow out from the spiral fluted outlet that is positioned at eddy flow inducting device bottom via helicla flute, in body of heater, form eddy current through the spiral fluted molten metal.Body of heater is cylindrical, and the molten metal of process eddy flow inducting device forms eddy current in the circular arc wall of body of heater.
104. form the cycle changing magnetic field in the body of heater periphery, magnetic field and eddy current and liquid-bath produce galvanomagnetic-effect, the molten metal that produces in liquid-bath in the vortex electromagnetic force promotion liquid-bath continues mobile.In one embodiment, form the cycle changing magnetic field in the body of heater periphery and be included in the periphery setting of body of heater around the rotating excitation field generator of body of heater rotation.The rotating excitation field generator comprises the permanent magnet of two semicircle annulars, is enclosed in the periphery of body of heater, and two permanent magnets rotate around the periphery of body of heater.The height of permanent magnet cover liquid-bath height at least half.
106. through after the scheduled time, molten metal is derived by the bottom of body of heater.In one embodiment, the rotating excitation field generator at the uniform velocity rotates around body of heater, molten metal is derived by the bottom of body of heater after rotating for two weeks.
Fig. 2 and Fig. 3 have disclosed according to the process of the stirring means of the molten metal of one embodiment of the invention and principle.Referring to figs. 2 and 3 shown in, being stirred in the body of heater 202 of molten metal finished, body of heater 202 is cylindrical, has entrance at the top of body of heater 202, the sidewall of body of heater 202 bottom has outlet 222, and door 223 is installed in the outlet 222.The molten metal that door 223 is opened in the body of heater then flows out, and door 223 closes then that molten metal is deposited in the body of heater 202.When entering body of heater 202, wants so that molten metal can produce eddy current the guide wire liquation.Adopt following mode to come so that molten metal produces eddy current among the present invention.
The guide wire liquation enters eddy flow inducting device 204, enters into body of heater 202 by eddy flow inducting device 204.Eddy flow inducting device 204 is installed in the entrance of body of heater 202, and molten metal enters into body of heater 202 inside through the eddy flow inducting device.In Fig. 2 and embodiment shown in Figure 3, eddy flow inducting device 204 is cylindrical.The surface of eddy flow inducting device 204 has helicla flute 241, and helicla flute 241 extends to the bottom from the top of eddy flow inducting device 204.Molten metal enters from the entrance of the helicla flute 241 that is positioned at eddy flow inducting device top, flow out from the outlet of the helicla flute 241 that is positioned at eddy flow inducting device bottom via helicla flute 241, through the molten metal of helicla flute 241 at body of heater 202 interior formation eddy current.Eddy flow inducting device 204 can have certain height, utilizes the larger characteristics of molten metal density, and molten metal constantly accelerates when flowing in the helicla flute 241 of eddy flow inducting device 204, has certain speed when being flowed out by the spiral fluted outlet.Body of heater 202 is cylindrical, on the circular arc sidewall of molten metal with certain speed directive body of heater 202, continues downslide self-assembling formation eddy current along sidewall.Like this, molten metal is to enter in the eddy current mode when entering into the liquid-bath 300 that is deposited on body of heater 202 bottoms, also can form preliminary eddy current on the surface of liquid-bath 300.
Because liquid-bath 300 has certain thickness, and the density of molten metal is larger, rely on the eddy flow inducting device only can form eddy current at surface and the shallow-layer of liquid-bath 300, for so that the molten metal of the middle lower floor of liquid-bath 300 also can move stirring, the present invention comes producing electromagnetic force promotion molten metal in liquid-bath 300 with galvanomagnetic-effect in the magnetic field of the periphery manufacturing rotation of body of heater 202.The rotation changing magnetic field is realized by rotating excitation field generator 206.Rotating excitation field generator 206 is installed in the periphery of body of heater 202, and rotating excitation field generator 206 can be around body of heater 202 rotations.In Fig. 2 and embodiment shown in Figure 3, rotating excitation field generator 206 comprises the permanent magnet of two semicircle annulars, and one of them is the N utmost point, and one is the S utmost point.The permanent magnet of two semicircle annulars is enclosed in the periphery of body of heater 202 and rotates around the periphery of body of heater 202.Two permanent magnets can be done turn clockwise (as shown in the figure) and also can do and be rotated counterclockwise.The continuous rotation of rotating excitation field generator 206 so that the solution pools 300 in the body of heater 202 be in the magnetic field of continuous change direction.Enter because molten metal is the modes with eddy current when entering liquid-bath 300, according to electromagnetic principle, rotating excitation field generator 206 can produce induced-current in molten metal.Utilize the electric conductivity of molten metal, all can there be induced-current in the whole liquid-bath 300, this induced-current further interacts with rotating excitation field generator 206, in liquid-bath 300, produce electromagnetic induction power, the molten metal that promotes in the liquid-bath 300 continues mobile, so that the molten metal in the liquid-bath 300 can be kept is mobile, reach the effect of stirring.For so that electromagnetic effects is obvious as far as possible, the height of the permanent magnet that in illustrated embodiment, uses cover liquid-bath 300 height at least half.
The molten metal Stirring regular hour in liquid-bath, open door 223, molten metal is derived by outlet 222.In one embodiment, rotating excitation field generator 206 at the uniform velocity rotates around body of heater 202, rotates two all back doors 223 at rotating excitation field generator 206 and opens, and with the bottom of molten metal by body of heater, derives by the outlet 222 that is installed on the sidewall of the furnace body bottom.
The stirring means of molten metal of the present invention utilizes the self gravitation of molten metal to make eddy current, and molten metal possesses certain speed when entering into body of heater can form eddy current.The present invention also provides the rotation changing magnetic field, utilizes electromagnetic principle so that produce induced-current in the molten metal eddy current, and the recycling induced-current forms electromagnetic force, so that the eddy current of molten metal can continue.Realize the stirring of molten metal by eddy current.
Claims (7)
1. the stirring means of a molten metal is characterized in that, comprising:
Molten metal is introduced in the body of heater in the eddy current mode, and the molten metal that enters body of heater forms liquid-bath, and the molten metal on liquid-bath surface forms eddy current;
Form the cycle changing magnetic field in the body of heater periphery, magnetic field and eddy current and liquid-bath produce galvanomagnetic-effect, and the molten metal that produces in liquid-bath in the vortex electromagnetic force promotion liquid-bath continues mobile;
Through after the scheduled time, molten metal is derived by the bottom of body of heater.
2. the stirring means of molten metal as claimed in claim 1, it is characterized in that, molten metal entered in the eddy current mode comprise in the body of heater that the guide wire liquation is through the eddy flow inducting device, the eddy flow inducting device is cylindrical, the surface of eddy flow inducting device has helicla flute, molten metal enters from the helicla flute entrance that is positioned at eddy flow inducting device top, flows out from the spiral fluted outlet that is positioned at eddy flow inducting device bottom via helicla flute, forms eddy current through the spiral fluted molten metal in body of heater.
3. the stirring means of molten metal as claimed in claim 2 is characterized in that, described body of heater is cylindrical, and the molten metal of process eddy flow inducting device forms eddy current in the circular arc wall of body of heater.
4. the stirring means of molten metal as claimed in claim 1 is characterized in that, forms the cycle changing magnetic field in the body of heater periphery and is included in the periphery setting of body of heater around the rotating excitation field generator of body of heater rotation.
5. the stirring means of molten metal as claimed in claim 4 is characterized in that, described rotating excitation field generator comprises the permanent magnet of two semicircle annulars, is enclosed in the periphery of body of heater, and two permanent magnets rotate around the periphery of body of heater.
6. the stirring means of molten metal as claimed in claim 5 is characterized in that, the height of described permanent magnet cover liquid-bath height at least half.
7. the stirring means of molten metal as claimed in claim 4 is characterized in that, the rotating excitation field generator at the uniform velocity rotates around body of heater, molten metal is derived by the bottom of body of heater after rotating for two weeks.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104646381A CN102914175A (en) | 2012-11-18 | 2012-11-18 | Molten metal stirring method |
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| CN2012104646381A CN102914175A (en) | 2012-11-18 | 2012-11-18 | Molten metal stirring method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106290064A (en) * | 2015-06-26 | 2017-01-04 | 鞍钢股份有限公司 | A kind of ladle soft argon blowing effect detection method |
| CN108927084A (en) * | 2018-07-18 | 2018-12-04 | 佛山市高明曦逻科技有限公司 | A kind of device and its application method for accelerating metal and solution reaction rate |
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| JP2004108666A (en) * | 2002-09-19 | 2004-04-08 | Fuji Electric Systems Co Ltd | Crucible-shaped induction furnace |
| CN2752271Y (en) * | 2004-06-11 | 2006-01-18 | 上海大学 | Metal melt bidirectional rotary magnetic field stirring purifier |
| CN100392126C (en) * | 2005-03-31 | 2008-06-04 | 江苏大学 | Magnetic chemical reaction in-situ synthesizing method for preparing metal base nano composite material |
| CN101265526A (en) * | 2008-04-29 | 2008-09-17 | 武汉理工大学 | Method for increasing AZ91D magnesium alloy corrosion-resistant property |
| CN102133629A (en) * | 2011-03-01 | 2011-07-27 | 大连理工大学 | Light-alloy electromagnetic suspension casting device and method |
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2012
- 2012-11-18 CN CN2012104646381A patent/CN102914175A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2562869Y (en) * | 2002-08-09 | 2003-07-30 | 李化民 | Liquid catalytic machine |
| JP2004108666A (en) * | 2002-09-19 | 2004-04-08 | Fuji Electric Systems Co Ltd | Crucible-shaped induction furnace |
| CN2752271Y (en) * | 2004-06-11 | 2006-01-18 | 上海大学 | Metal melt bidirectional rotary magnetic field stirring purifier |
| CN100392126C (en) * | 2005-03-31 | 2008-06-04 | 江苏大学 | Magnetic chemical reaction in-situ synthesizing method for preparing metal base nano composite material |
| CN101265526A (en) * | 2008-04-29 | 2008-09-17 | 武汉理工大学 | Method for increasing AZ91D magnesium alloy corrosion-resistant property |
| CN102133629A (en) * | 2011-03-01 | 2011-07-27 | 大连理工大学 | Light-alloy electromagnetic suspension casting device and method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106290064A (en) * | 2015-06-26 | 2017-01-04 | 鞍钢股份有限公司 | A kind of ladle soft argon blowing effect detection method |
| CN106290064B (en) * | 2015-06-26 | 2018-10-09 | 鞍钢股份有限公司 | A kind of ladle soft argon blowing effect detection method |
| CN108927084A (en) * | 2018-07-18 | 2018-12-04 | 佛山市高明曦逻科技有限公司 | A kind of device and its application method for accelerating metal and solution reaction rate |
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Application publication date: 20130206 |