CN102260800A - Magnesium alloy jet refining technique and device thereof - Google Patents
Magnesium alloy jet refining technique and device thereof Download PDFInfo
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- CN102260800A CN102260800A CN2011101909906A CN201110190990A CN102260800A CN 102260800 A CN102260800 A CN 102260800A CN 2011101909906 A CN2011101909906 A CN 2011101909906A CN 201110190990 A CN201110190990 A CN 201110190990A CN 102260800 A CN102260800 A CN 102260800A
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Abstract
The invention relates to a jet refining device used for refining treatment in magnesium alloy smelting process. The device is characterized in that: the core part of the jet refining device consists of a motor (1), an axis (2), a centrifuge tube (3) and a draft tuber (4); the centrifuge tube (3) and the draft tube (4) are Y-shaped; the center line of the axis (2) coincides with the center line of the draft tube (4); the rotational speed of the axis (2) is 50-150 rotations per minute; the jet refining device is arranged in a system consisting of a crucible (5), magnesium solution (6), refining flux (7) and sediments (8); a rate of the rotational diameter of the centrifuge tube (3) to the internal diameter of the crucible (5) is 0.20-0.33; a distance from the opening of the draft tube (4) to the bottom of the crucible (5) is 100-250 millimeters; a distance from the opening of the centrifuge tube (3) to solution surface of an upper part is 100-150 millimeters; the internal diameter of the centrifuge tube (3) is 50-100 millimeters; the internal diameter of the draft tuber (4) is 1.4 times more than the internal diameter of the centrifuge tube; an angle between the centrifuge tube (3) and the draft tube (4) is 95-105 DEG; and a combination of turbulent flow stirring of magnesium alloy refining and overall flow circulation is formed by jetting flow of the outlet port of the centrifuge tube (3) and inlet flow of the inlet port of the draft tube (4) when the jet refining device rotates.
Description
Technical field
The invention belongs to the device and methods for using them of magnesium alloy smelting, especially belong to the equipment that magnesium alloy refining is handled.The present invention is applicable to various magnesium alloy smelting productions, comprises the liquid magnesium alloy purifying treatment of Mg alloy castings, D.C.casting, magnesium alloy ingot production process.
The method background
Magnesium alloy is lighter by 37% than aluminium alloy, and its specific tenacity, specific rigidity are only second to titanium alloy and structural alloy steel, and other is as shock resistance, processing characteristics, and recyclable performance all is better than aluminium alloy.In fields such as automobile, traffic, electronics, information, acoustic image equipment, computer, hand-held tool, electric machine industry, forestry, weaving, nuclear power plants, Application of Magnesium is also enlarging rapidly.At present, magnesium has become the third-largest structural metallic materials that is only second to iron and steel, aluminium alloy.But to be toughness and tenacity lower and the aluminium alloy competition is on a sticky wicket for the weakness of magnesium alloy maximum.The purity that develops high tough novel magnesium alloy and raising magnesium alloy is two feasible way.Method of refining has conclusive effect in the purity invention that improves liquid magnesium alloy.
Magnesium is very active, and a large amount of reaction product is produced in the oxidation of high temperature magnesium alloy, for oxidation and burning and the liquid magnesium alloy purification that prevents magnesium liquid, all will use molten drug when melting magnesium and magnesium alloy.Flux is halid mixture, comprises MgCl
2,KCl, NaCl, BaCl
2,CaCl
2,CaF
2,MgF
2Deng, therefore, the residual inclusion of magnesium alloy has MgO, Mg (OH)
2, Mg
3N
2, flux etc.The distribution of sizes of inclusion is very wide in the magnesium alloy, has to micron from centimetre, millimeter, wherein micron-sized being in the great majority and enormous amount, at most even may reach and have 1,000 ten thousand more than in 1 cubic centimeter volume.If the non-metallic inclusion in the liquid magnesium alloy enters foundry goods or ingot blank at last, become the nonmetal inclusion in the product at last.Inclusion is extremely harmful to the performance of magnesium alloy, and particularly impact toughness and antifatigue high-performance are very harmful.The inclusion that exists at the stress raiser of member impels the interface cracking that is mingled with matrix, thereby forms the cavity; Under stress, grow up in the cavity and the also final cavity of polymerization is connected with crackle, causes the crackle fast development, last member fracture.The magnesium-alloy material range of application enlarges, the big stressed component of wrought magnesium alloys, and inclusion reduces the fracture mechanical property of structural part strongly, fatigue strength especially, therefore, the cleanliness factor to liquid magnesium alloy during melting requires more and more higher.The gap of the needs of magnesium alloy refining method and magnesium industry is increasing.The magnesium alloy component become main load component, and for example high-speed train body, automotive hub, vertiplane wheel box casing etc. require more and more highlyer to the metallurgical quality of magnesium alloy, and the restriction of inclusion is very strict.The inside of an automotive hub at most only allows 0.2 millimeter inclusion to be no more than several.Remove the refining procedure meaning particularly important of non-metallic inclusion during magnesium alloy smelting, these require to surpass the level that traditional method of refining can reach.
Generally all need to use refining flux during magnesium alloy refining, outside anti-oxidation of flux decapacitation and the burning, also can adsorb in the liquid magnesium alloy non-metallic inclusion and as the refining agent of magnesium alloy.General all flux is realized by the operation of stirring liquid magnesium alloy in the magnesium alloy smelting process.Also have and adopt purifications of swimming, precipitation to purify or filtration, purification, but all must and stir associating, as what stir additional.For example.Precipitate many restricted conditions such as purifying the residence time that needs length, big volumetrical liquid magnesium alloy, rational bath temperature gradient, influence sedimentation effect to avoid the stirring that thermal convection causes in the magnesium alloy liquid pool.Filtration, purification is used for Foundry Production at present mostly, also has to adopt in batches liquid magnesium alloy of filtration, purification.Filtering the purified purpose is to remove at alloy liquid mobile secondary oxidation in the final stage of molten metal.It is earlier flux to be sprinkling upon the surface that flux stirs refining, and refining operation is to adopt the stirring to liquid metal to realize.The hand mixing that the casting of low capacity crucible magnesium alloy smelting is used.Because the labor condition of hot environment is abominable, the stirring means standard is asked the time length that reaches certain, make that hand mixing operation labour intensity is excessive and it is very high that method is required, therefore, manual operation can't be ensured the quality of products.And the magnesium alloy smelting maximization makes problem become more and more outstanding.
The stirring of liquid magnesium alloy must make liquid produce certain main body and flow and turbulence intensity in order to reach the purified purpose.Main body flows and to make everywhere liquid all obtain stirring to obtain a mixing of setting the tone uniformity coefficient.Turbulence intensity is big more, and the separation yardstick of blending ingredients is more little, and the contact area of two liquid is big more, by molecular diffusion, makes the more abundant wash heat effect of acquisition.What use now is propeller agitator substantially, belongs to axial flow type stirrer, and main body stream is fit to small containers.Low speed paddle agitator no matter be that straight blade or hinged joint mainly are radial flows, all can not be taken into account main body and flow and turbulence intensity.For fear of the dead angle, stir and at first want bulk flow.But present magnesium alloy stirring operation, along with the concentration degree of magnesium industry improves, the maximization crucible for smelting generally use, traditional stirring means can't get a desired effect.The size of the big volume magnesium alloy smelting crucible of several tons of liquid magnesium alloy very big (pool depth is many more than 1 to 2 meter), even use the stirring of pusher impeller, also be not enough to obtain the main body convection current of needs, so the refining effect deficiency, the cleanliness factor of liquid magnesium alloy does not reach desired destination.In addition, agitator is in very harsh environment, and mechanical fault is many, reliability is very poor.The expansion of the development of magnesium industry and magnesium alloy Application Areas needs the more material of high cleanliness, therefore, improves the raising of the stirring method of refining level of material purity, has become the task of top priority of magnesium industry.
Summary of the invention
The purpose of invention is a design liquid magnesium alloy mechanical stirring refining unit, by giving the liquid flow field that magnesium alloy refining needs, reaches the flux homogenizing and is mingled with compound and gathering, reaches precipitate and separate at last.The target of invention is a realization theory basic science, apparatus structure is simple and reliable and refining agitator design and coupling easy to use and that maintenance is easy, refining effect is good.
Target of the present invention is achieved in that the theoretical analysis based on magnesium alloy refining, adopts by motor (1), axle (2), centrifuge tube (3), guide shell (4) and forms.Centrifuge tube (3) and guide shell (4) are " Y " font, i.e. centrifuge tube outlet is upwards tilted a little.Guide shell axle (2) and guide shell (4) central lines.Axle, centrifuge tube and guide shell are integrally welded, when the liquid magnesium alloy refining treatment, in guide shell (4) and the deep system by crucible (5), magnesium liquid (6), refining flux (7) and sediment (8) of centrifuge tube (3).Liquid is subjected to centrifugal action and accepts external work at centrifuge tube from the liquid magnesium alloy that the thrust-augmenting nozzle import sucks during the agitator rotation, and is going out the interruption-forming jet.This patent is according to different equipment, and for example the type of crucible and volume, Production Line rate variation range are very big, and purifier is designed.Melt coupling in the length, internal diameter, rotating speed etc. that make pipeline and the crucible is to reach better effect.Agitator speed is 50～150 rev/mins, and the best is 80 rev/mins; The centrifuge tube rotating diameter is 0.20～0.33 with the ratio of crucible internal diameter, and the best is 0.25; The water conservancy diversion mouth of pipe is apart from 100 millimeters～250 millimeters of the distances of crucible bottom, and centrifuge tube is apart from 100 millimeters～150 millimeters of the distances of top liquid level, and ground level is got higher value with the pool depth increase at the bottom of sinking to the degree of depth and being higher than crucible; The centrifuge tube internal diameter is 50～100 millimeters, and the thrust-augmenting nozzle interior diameter is 1.4 times of centrifuge tube, and the pipe interior diameter increases with crucible; Centrifuge tube and thrust-augmenting nozzle angle are between 95 degree are spent to 105.
The magnesium alloy flux-refining utilizes wash heat method principle, at first makes flux and liquid magnesium alloy thorough mixing, and mixing process flux and be mingled with combination separates and reaches the purified purpose from liquid magnesium alloy then.Make flux and inclusion combination, should create conditions makes the two earlier fully close, and then flux absorption and wetting inclusion, forms the mixture that is mingled with nothing and flux.In the molten bath motion of liquid impel be mingled with the flux mixture bump and assemble become more volume be mingled with the flux mixture.Be mingled with surface tension and density difference between flux mixture and the liquid magnesium alloy, cause being separated and last emersion molten bath of they, reach liquid level, thereby reach purpose the liquid magnesium alloy cleaningization.This shows, be stirred in the said process and play a crucial role.The variation of interfacial energy in refining process is that flux absorbs the thermodynamics basis that is mingled with, stirring purified basic demand flux disperses, fully contacts with inclusion and adsorb at the liquid magnesium alloy camber, constantly collision timeliness size is mingled with collision and is gathered into the large size aggregation, along with collision frequency increases, aggregate size is increasing-separates.If change flux into multiviscosisty flux this moment, then the surface energy of mixture and density difference all increase, and more separate easily and sinking are separated from magnesium alloy melting pool at last.
According to hydromechanical theory, reach the mixing effect that magnesium and liquid magnesium alloy production technique need, liquid movement comprises that the overall convection current of formation, whirlpool are according to hydromechanical theory during stirring, reach the mixing effect that magnesium and liquid magnesium alloy production technique need, the liquid movement mode that whole molten metal melt pool is stirred should be the combination of three kinds of different motion: the one, form the main body convection current, the Methodistic cyclotron motion on a large scale from the bottom to the liquid level of whole molten metal realizes " agglomerate " of different zones and mixing of " agglomerate ".Because magnesium alloy generally all is to carry out melting in the crucible of steel plate welding, magnesium liquid should be from down to up turning motion at vertical cross-section.The 2nd, form the eddy current diffusion, the main body convection current can not make liquid among a small circle carry out uniform mixing, different fluid layers in the main body convection current should have velocity contrast, thereby what make friction-motion speed once produced the intensive shearing action with the interface of layer, thereby produce a large amount of vortexs, cause a large amount of interior among a small circle convective motions, these vortexs are reduced to vortex size itself to the ununiformity of " agglomerate " and " agglomerate ".The 3rd, form atomic diffusion, alloy requires element to reach the uniform mixing of atomic scale, and swirling motion can produce this kind effect, and the more little pedesis effect of atom that can make more of vortex is good more.Different processes flows to these two kinds different requirements.Drop, bubbles dispersion need the pulsation of intensive turbulent flow; The even suspension of solid particulate depends on bulk flow.Energy is the major issues in the agitator design these the two kinds distribution on flowing during stirring.When stirring the mixture, biphase density difference, viscosity and interfacial tension have a significant impact stirring operation.Density difference and interfacial tension are more little, and system is easy to the dispersion that reaches stable more; Viscosity is big more to be unfavorable for forming good circulating and enough turbulent flow pulsation more, and consumes bigger power of agitator.Ideal magnesium alloy refining stirring energy thorough mixing, the cycling stream that forms in crucible melt space do not have the dead angle.Molten bath during based on magnesium alloy smelting belongs to low viscosity flux-liquid magnesium alloy system, studied two-phase system characteristic of fluid and hydrokinetics rule that low viscous liquid-liquid disperses body, analyzed experimental data and experiment law, the inventor think whipping process to satisfy in the liquid magnesium alloy and flux or flux be mingled with the particle diameter and the size distribution of mixture.Median size depends primarily on the stirring of unit volume liquid, especially stirs shearing force and has duality, even big drop division also makes small droplets merge.The wetting good system of two-phase, the drop merger trend is very little; The wetting relatively poor system of two-phase, drop merge the system interfacial energy and reduce, and the trend that small droplets merges increases.Stir early stage during magnesium alloy refining, the flux drop is thin more good more, and the later stage then wishes to adsorb sufficient flux dispersion size and assembles.Can infer that forming overall convection current is that the Methodistic cyclotron motion on a large scale from the bottom to the liquid level of whole molten metal is basic, because the just macroscopical totally fall-out of convection current of eddy current and atomic diffusion.
Stir main body stream, eddy current and the microcosmic diffusion gap that exists for satisfying magnesium alloy, the magnesium alloy refining of this patent is auxiliary with the design increase guide shell of jet purifier, make that all molten metals can carry out compulsory long distance circulation by guide shell in the crucible, the molten metal that promptly guarantees the crucible bottom zone top, big molten bath of also circulating.The jet that centrifuge tube goes out interruption-forming is to make to stir the numerical range that Reynolds number reaches turbulent area, forms strong short-range diffusion.The turbulent flow essence that this jet forms be the liquid that penetrates of spout and on every side melt bump and carry out energy exchange, be the process of momentum and mass transport.Because jet itself is strong turbulent flow, stream range liquid magnesium alloy on every side is involved in the stream thigh and produces eddy current, and both work in coordination with the intense mixing effect that causes.For this reason, the jet refining of this patent is easy to meet the requirements of the demand of purification to process: flux dispersion in liquid magnesium alloy, flux collides with nonmetal inclusion, contacts, in wetting, absorption, assemble, satisfy the last isolating prerequisite that staticly settles.In addition because the viscous effect of molten metal, outside guide shell, grow apart from producing shearing between the different liquid layers of cyclic motion and also produce vortex.For form the hump of certain altitude at the upper surface in molten bath, guide shell upwarps.When disperseing more evenly at the new flux that is sprinkled on the hump and residence time in liquid prolongs.Sink to the degree of depth, motor rotary speed by changing agitator, centrifuge tube has thrust-augmenting nozzle and upwarps angle and also can cooperate the effect that reaches adjustment movement speed and flow field, change liquid level hump height, to adapt to different operational requirements, obtains best effect.
The concrete parameter of the purifier of this patent all needs to design according to different working conditions with size, mates with smelting furnace to reach better.
The jet stream thigh that centrifuge tube goes out interruption-forming will carry out the exchange of momentum and quality with melt on every side, mix thereby form.Jet speed is very big to the mixture strength influence, and speed is high more, and the Reynolds number of turbulent region is also high more, and mixed effect is also good more.The original speed of jet stream thigh and centrifuge tube length are directly proportional and rotating speed square proportional.Common fixedly centrifuge tube length, adjustment CD-ROM drive motor rotating speed can realize changing the jet original speed.Also will avoid the upper surface in molten bath the intensive oxidation to occur simultaneously, the centrifuge tube exit velocity can not be too high.General agitator speed is 50～150 rev/mins, and the best is 80 rev/mins; The centrifuge tube rotating diameter is 0.20～0.33 with the ratio of crucible internal diameter, and the best is 0.25; The water conservancy diversion mouth of pipe is apart from 100 millimeters～250 millimeters of the distances of crucible bottom, and centrifuge tube is apart from 100 millimeters～150 millimeters of the distances of top liquid level, and ground level is got higher value with the pool depth increase at the bottom of sinking to the degree of depth and being higher than crucible; The centrifuge tube internal diameter is 50～100 millimeters, and the thrust-augmenting nozzle interior diameter is 1.4 times of centrifuge tube, and the pipe interior diameter increases with crucible; Centrifuge tube and thrust-augmenting nozzle angle are between 95 degree are spent to 105.Stir just one of purified operation, because refining time generally was controlled in 20 minutes, so churning time is limited in 5～15 minutes usually, molten metal is dirty more, and churning time is long more.Decontamination effect improving increases with cycle index and improves, be higher than certain cycle index after, degree of purification no longer obviously increases.Will guarantee certain overall metal internal circulating load in churning time, the cycle index of ensemble stream should be greater than 5 times, and promptly per minute is at least 0.5 time.The crucible of 1 ton of fusing amount for example need be finished 0.5 ton ensemble stream circulation in 1 minute, finished 5 ensemble stream circulations in 10 minutes.When rotating speed is fixed, the centrifuge tube exit velocity also is fixed, the crucible capacity is big more, then needs thick more pipeline meeting the requirements of the cycle index of melt in the crucible during the refining operation, and the diameter of thrust-augmenting nozzle is generally 2 times of centrifuge tube cross-sectional area from its cross-sectional area and calculates.According to experimental result, it is little in the differences in viscosity of melting temperature range to be used for flux and liquid magnesium alloy, when the centrifuge tube exit velocity is 3 meters/minute, can calculate the centrifuge tube cross-sectional area by counter the pushing away of flow.During stirring,, therefore, the water conservancy diversion mouth of pipe is goed deep into the degree of depth be controlled at apart from 200 millimeters～300 millimeters of the distances of crucible bottom if the dregs of society gain an upper hand molten bath bottom will influence decontamination effect improving.Simultaneously, following 100 millimeters～300 millimeters of centrifugal mouth of pipe immersion liquid face does not cause surperficial vigorous agitation to keep jet.Calculate the thrust-augmenting nozzle height by the melt degree of depth in conjunction with the above-mentioned desired location of purifier.
Description of drawings
Fig. 1 is the structural representation of magnesium alloy jet purifier.
Magnesium alloy jet purifier is made up of motor (1), axle (2), centrifuge tube (3), guide shell (4).Centrifuge tube (3) and guide shell (4) are " Y " font, and promptly centrifuge tube exports about 5 ° of inclinations that make progress.Guide shell axle (2) and guide shell (4) central lines are to reduce vibration.Axle, centrifuge tube and guide shell are integrally welded, and motor base is placed in a carriage.Before using with the carriage frame crucible limit centering, and guide shell (4) and centrifuge tube (3) are deep in the system by crucible (5), magnesium liquid (6), refining flux (7) and sediment (8).During motor energising rotation, the liquid magnesium alloy in the centrifuge tube is accelerated under centrifugal action and throws away the formation jet from the mouth of pipe, and high turbulences is caused in the fluerics.Turbulent flow is effectively mixed flux and liquid magnesium alloy, and this moment, the diversed pipe of melt of crucible bottom sucked, and becomes certain initial velocity jet and form fan spray stream thigh outside the mouth of pipe in outlet.Be thrown out of liquid magnesium alloy and rush at liquid level and form certain crest, sink subsequently.Inclusion in the working cycle liquid magnesium alloy is captured formation flux by flux gradually and is mingled with mixture, and complex body has mutual collision, polymerization simultaneously.The turbulent flow essence that this jet forms be the liquid that penetrates of spout and on every side melt bump and carry out energy exchange, it is the process of momentum and mass transport, cause intense mixing, the non-metallic inclusion that this jet refining is more conducive in the liquid magnesium alloy separates from the molten bath at last, thereby meets the requirements of the refining purpose.Hang out and remove after operation is finished, do not influence other operation of production process.
In order to obtain best effect, the parameter designing of purifier must and different crucibles mate, comprise the length ratio of rotating speed, pipeline of motor and internal diameter etc.Following 100 millimeters～150 millimeters of centrifuge tube immersed in liquid level, the import of guide shell lower end avoid that the dregs of society gain an upper hand with crucible bottom, apart from 150 millimeters～250 millimeters of the appropriate distance of crucible bottom, and immersion depth and all get bigger value with the increase of crucible flux apart from the distance of bottom.The centrifuge tube rotating diameter is 0.20～0.33 with the ratio of crucible internal diameter, and the best is 0.25.The centrifuge tube internal diameter is 50～100 millimeters selections, and the guide shell internal diameter is about 1.4 times of centrifuge tube internal diameter, with the loop cycle that keeps production technique to need.Centrifuge tube and thrust-augmenting nozzle angle are between 95 degree are spent to 105, to rush at liquid level and form certain crest to obtain being thrown out of liquid magnesium alloy, and this crest can be involved in magnesium alloy fused mass inside with surperficial flux.
Particularly, the present invention relates to be used in a kind of magnesium alloy smelting process the jet purifier of refining treatment, it is characterized in that: the core of jet purifier is by motor (1), axle (2), and centrifuge tube (3), guide shell (4) is formed; Centrifuge tube (3) and guide shell (4) are " Y " font, axle (2) and guide shell (4) central lines, and axle (2) rotating speed is 50～150 rev/mins; The jet purifier places the system of being made up of crucible (5), magnesium liquid (6), refining flux (7) and sediment (8), and the ratio of centrifuge tube (3) rotating diameter and crucible (5) internal diameter is 0.20～0.33; Thrust-augmenting nozzle (4) mouthful is apart from 100 millimeters～250 millimeters of the distances of crucible (5) bottom, centrifuge tube (3) mouthful is apart from 100 millimeters～150 millimeters of the distances of top liquid level, centrifuge tube (3) internal diameter is 50～100 millimeters, thrust-augmenting nozzle (4) internal diameter is 1.4 times of centrifuge tube, and centrifuge tube (3) and thrust-augmenting nozzle (4) angle are between 95 degree are spent to 105.Centrifuge tube during rotation (3) outlet jet and guide shell (4) inlet suction current form the turbulences and the combination of ensemble stream round-robin of magnesium alloy refining.
Preferably, axle (2) rotating speed is 80 rev/mins.
Preferably, the ratio of the rotating diameter of centrifuge tube (3) and crucible (5) internal diameter is 0.25.
Specific embodiment
The magnesium alloy plate casting that use with stirring method of refining and device 800 kg capacity crucibles coupling
The quality control of magnesium alloy sheet is very strict, and the existence of inclusion not only reduces mechanical property and refers to, also worsens the operation of rolling, and multiple rolling defect is all relevant with inclusion.For this reason, increase the jet a refining unit of this patent at the fusion process of casting and rolling the production line.
The crucible interior diameter of melting magnesium alloy is 1200 millimeters of the magnesium alloy fused mass degree of depth in 700 millimeters, crucible.The refining agitator speed of configuration is 82 rev/mins, and 200 millimeters of centrifuge tube rotating diameters, centrifuge tube internal diameter are 60 millimeters, and the thrust-augmenting nozzle interior diameter is 90 millimeters, and centrifuge tube and thrust-augmenting nozzle angle are 95 degree, and thrust-augmenting nozzle length is 900 millimeters.
800 kilograms of furnace charges at first melt intensification, and temperature remains on 720 ℃ before the refining, and the water conservancy diversion mouth of pipe of purifier stretches into apart from 200 millimeters of the distances of crucible bottom.This moment, centrifuge tube was apart from 100 millimeters of the distances of top liquid level.Starting power supply rotates purifier.During churning, No. 2 refining fluxs evenly are sprinkling upon liquid level continuously, process continued to carry out 10 minutes, again No. 5 flux evenly was sprinkling upon liquid level 2 minutes continuously.At this moment, liquid level does not have powdery dregs emersion and point of ignition, and magnesium liquid surface presents silvery white mirror-like, stops to spread flux, and agitator rotation stopping back being hung out crucible.Claw dross on surface of fusant, spread, change over to and leave standstill, leave standstill after 30 minutes and pour into a mould sample with thin layer flux.
Take out liquid magnesium alloy and pour into a mould sample from 50 ∽ 70mm below the magnesium alloy melting pool liquid level with the standard sample scoop before the cast.Cooled sample is cut along central part, on sand paper, polish, handle and visual evaluation by the purified low power test piece of this enterprise then.This company standard comprises: diameter is greater than 0.2 millimeter non-metallic inclusion number in the stereoscopic microscope inspection polishing test piece fixed-area visual field; After washing was corroded in the polishing test piece in 10 minutes behind the 3%NaCl aqueous corrosion, absolute ethanol washing again, and hot blast drying, hot spot surpasses 1 millimeter counting.The magnesium alloy trade mark of test comprises AZ31B, AZ91D, three kinds of typical materials of MB8.Several 200 of the test piece that tradition hand mixing purifying method is checked, totally 15 of oxide inclusion test piece numbers account for 7.5%, and totally 21 of residual flux etched sheet numbers account for 10.2%.Several 300 of the test piece that this patent stirring purifying method is checked, oxide inclusion test piece number is sheet 9 altogether, accounts for 3%, and totally 7 of residual flux etched sheet numbers account for 2.3%;
The present invention carries out the production experiment of magnesium alloy refining, and operations is functional.Refining effect shows, the present invention have produce high-quality liquid magnesium alloy ability, compare the ability of removing oxide inclusion with the effect of traditional method of refining and method and improve 2.5 times, the residual flux removal effect improves 4.5 times.The present invention is the more refining of large vol crucible (1500 kilograms) also, and above-mentioned advantage exists equally.
Claims (4)
1. be used for the jet purifier of refining treatment in the magnesium alloy smelting process, it is characterized in that: the core of jet purifier is by motor (1), axle (2), and centrifuge tube (3), guide shell (4) is formed; Centrifuge tube (3) and guide shell (4) are " Y " font, axle (2) and guide shell (4) central lines, and axle (2) rotating speed is 50～150 rev/mins; The jet purifier places the system of being made up of crucible (5), magnesium liquid (6), refining flux (7) and sediment (8), and the ratio of centrifuge tube (3) rotating diameter and crucible (5) internal diameter is 0.20～0.33; Thrust-augmenting nozzle (4) mouthful is apart from 100 millimeters～250 millimeters of the distances of crucible (5) bottom, centrifuge tube (3) mouthful is apart from 100 millimeters～150 millimeters of the distances of top liquid level, centrifuge tube (3) internal diameter is 50～100 millimeters, thrust-augmenting nozzle (4) internal diameter is 1.4 times of centrifuge tube, and centrifuge tube (3) and thrust-augmenting nozzle (4) angle are between 95 degree are spent to 105.
2. jet purifier as claimed in claim 1 is characterized in that axle (2) rotating speed is 80 rev/mins.
3. jet purifier as claimed in claim 1 is characterized in that the rotating diameter of centrifuge tube (3) and the ratio of crucible (5) internal diameter are 0.25.
4. as claims 1 described jet purifier, it is characterized in that: centrifuge tube during rotation (3) outlet jet and guide shell (4) inlet suction current form the turbulences and the combination of ensemble stream round-robin of magnesium alloy refining.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110629040A (en) * | 2019-10-17 | 2019-12-31 | 常州大学 | Device and method for recovering low-iron-content alloy liquid from high-aluminum zinc slag |
| CN115287462A (en) * | 2022-06-22 | 2022-11-04 | 上海航天精密机械研究所 | Magnesium alloy melt composite refining realization device and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4018598A (en) * | 1973-11-28 | 1977-04-19 | The Steel Company Of Canada, Limited | Method for liquid mixing |
| CN1544670A (en) * | 2003-11-11 | 2004-11-10 | ���ݻ�þ�¼�����������˾ | Magnesium alloy liquid agitating and purifier |
| CN101348867A (en) * | 2008-09-04 | 2009-01-21 | 西南铝业（集团）有限责任公司 | Aluminum melt furnace refining device |
-
2011
- 2011-07-08 CN CN2011101909906A patent/CN102260800A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4018598A (en) * | 1973-11-28 | 1977-04-19 | The Steel Company Of Canada, Limited | Method for liquid mixing |
| CN1544670A (en) * | 2003-11-11 | 2004-11-10 | ���ݻ�þ�¼�����������˾ | Magnesium alloy liquid agitating and purifier |
| CN101348867A (en) * | 2008-09-04 | 2009-01-21 | 西南铝业（集团）有限责任公司 | Aluminum melt furnace refining device |
Non-Patent Citations (1)
| Title |
|---|
| 派罗特克公司: "用PAL精炼剂喷射器处理铝液的优点", 《特种铸造及有色合金》, no. 4, 31 December 1996 (1996-12-31), pages 52 - 53 * |
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| CN110629040A (en) * | 2019-10-17 | 2019-12-31 | 常州大学 | Device and method for recovering low-iron-content alloy liquid from high-aluminum zinc slag |
| CN115287462A (en) * | 2022-06-22 | 2022-11-04 | 上海航天精密机械研究所 | Magnesium alloy melt composite refining realization device and method |
| CN115287462B (en) * | 2022-06-22 | 2024-03-15 | 上海航天精密机械研究所 | Device and method for realizing composite refining of magnesium alloy melt |
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