CN202081152U - Flux jet device for removing impurities from molten aluminum - Google Patents
Flux jet device for removing impurities from molten aluminum Download PDFInfo
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- CN202081152U CN202081152U CN2011200787409U CN201120078740U CN202081152U CN 202081152 U CN202081152 U CN 202081152U CN 2011200787409 U CN2011200787409 U CN 2011200787409U CN 201120078740 U CN201120078740 U CN 201120078740U CN 202081152 U CN202081152 U CN 202081152U
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- flux
- crucible
- furnace body
- jet pipe
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Abstract
The utility model provides a flux jet device for removing impurities from molten aluminum, which comprises a lower furnace, a crucible, a heating element, a jet pipe, a middle partition plate and a pipeline. The flux jet device is characterized in that an upper furnace, a mixing chamber and the heating element are arranged on the middle partition plate, the upper furnace is provided with an air inlet valve and an air release valve, the mixing chamber and the crucible are connected with each other by the jet pipe, and the space between the mixing chamber and the jet pipe is sealed by a ceramic sealing gasket. The operating principle of the flux jet device includes that aluminum melt and liquid flux are placed in the crucible, the liquid flux covers the aluminum melt, the pressure of the lower furnace is increased, the aluminum melt firstly stably enters the mixing chamber along the jet pipe, the liquid flux subsequently enters the mixing chamber in a jet mode to be evenly mixed with the aluminum melt, the pressure of the lower furnace is released, mixed liquid falls back to the crucible, and the operation can be repeated for many times. The device is high in impurity removing efficiency, short in treatment time, closed in technical process and free of environmental pollution, and is especially applicable to impurity removal and purification for aluminum base alloy melt as the aluminum melt can be directly cast after impurity removal.
Description
Technical field
The utility model belongs to casting field, relates to a kind of flux fluidic device of molten aluminium removal of impurities.
Background technology
In metallurgy, melting and castingprocesses, inevitably exist some deleterious inclusiones in aluminium and the alloy thereof, these inclusiones make matrix discontinuous, become the formation of crack of structural part inside, reduce intensity, plasticity and the impact property of alloy, also can become the root of materials chemistry corrosion or galvanic corrosion simultaneously.On the other hand, inclusion has the intensive adsorption to harmful element hydrogen, is to cause material pin hole, loose important factor.In the aluminium generation of oxide inclusion be since molten aluminium with interface that outside atmosphere contact on physics or chemical transformation take place, or in cast and transfer process, be involved in the oxide inclusion etc. of gas generation because of the liquid level stirring.The method of removing the inclusion in aluminium and the alloy thereof has the method for swimming, flux method, filtration method etc.Its removal of impurities principle is to use variously has adsorbing adsorption medium to inclusion, as inertia or reactive gas, liquid, villaumite, filtration mediums etc. allow melt fully contact with adsorption medium, inclusion in the melt and the chemical or mechanical effect of adsorption medium generation physics, shift to adsorption medium, reach the purpose of removing inclusion.The most frequently used way of flux removal of impurities is that flux is spread on the liquid level of molten aluminium, and the inclusion in the molten aluminium is adsorbed; Perhaps adopt stirring method, strengthen contacting of flux and molten aluminium, the inclusion in the molten aluminium is adsorbed by flux better.This method treatment time is longer, and impurity-eliminating effect is relatively poor, and whipping process is involved in air generation secondary oxidation inclusion easily.In order to improve the effect of flux removal of impurities, people explore new method and refining plant, now take passages relevant document as follows:
Chinese patent CN98205426.2, a kind of graphite cleaner that is used for the aluminum melt removal of impurities.Its structure comprises: a cleaner rotor, and this cleaner rotor is a gear type; One cleaner rotor shaft, this rotor shaft and an end cleaner rotor Joint; One cleaner connects dop outward, and this cleaner connects the dop bottom outward and combines as a whole with cleaner rotor shaft top, and top connects with outside revolving power mechanism; One ventilating pit, this ventilating pit axially runs through cleaner rotor, cleaner rotor shaft, cleaner respectively and connects dop outward, it is characterized in that also having in the outside of the middle and upper part of rotor shaft: a matrix material cast chuck layer, this composite tube type cover interlayer are tightly because of at the rotor shaft outside surface; One graphite cast reinforcing sleeve layer, this graphite such as strong jacket layer are fastened on the outside surface of matrix material cast chuck layer.
Chinese patent CN01139250.9, the device of filtration, purification nonmetallic inclusions from aluminum melts.Mainly comprise: resistance furnace, crucible, agitator, insulation cover, steel drum and adjustable for height lifting device, at first steel drum is enclosed within the crucible outside, be arranged in the resistance furnace then, fix with refractory materials, with screw rod insulation cover and resistance furnace are coupled together, adjustable for height lifting device is inserted from the insertion mouth of insulation cover, and resistance furnace mainly comprises: heating unit, insulation furnace shell, heating unit is arranged on resistance furnace burner hearth inboard, clogs with ceramic wool between resistance furnace burner hearth and insulation furnace shell.Principle of work is: at first put into flux and aluminium ingot respectively in two crucibles, and put into insulating covering agent in the crucible of aluminium ingot is housed.Next connects the process furnace power supply, after flux and aluminium ingot all melt, again agitator is put into molten flux, with spoon molten aluminium adorn, divides batch to pour runner into and enters and rotate in the molten flux.Wait until that at last the molten aluminium transfer is over, and takes out agitator again.Earlier active flux and aluminium ingot are put into two plumbago crucibles of stove respectively when device is specifically worked, in the graphite that aluminium ingot is housed caves in, also will put covering flux (composition is the same with the active flux that filters usefulness).After flux and aluminium ingot all melt, agitator is put into the flux plumbago crucible, and then molten aluminium is poured in the flux of rotation.Because in agitation and filtration molten aluminium process, the liquid level of flux can and raise along with the molten aluminium adding.Therefore, the support of regulating the agitator height is arranged, the impeller of agitator is in the flux layer all the time.After molten aluminium is all transferred to the flux crucible, again promoting agent is put into the molten aluminium plumbago crucible that has been transferred, by the time after flux melts, again agitator is put into the plumbago crucible that flux is housed from the agitator inlet, and then molten aluminium is poured in the flux of rotation.Filtration each time all is the operation above the repetition, can make in the molten aluminium inclusion constantly be distributed to aluminium to drip on the surface by purifying repeatedly, simultaneously aluminium drops in and also can redistribute the inclusion of aluminium in dripping in the flux of rotation, drips on the surface thereby also make the inclusion of aluminium in dripping also have an opportunity to be distributed to aluminium.Aluminium drips lip-deep inclusion and can pass aluminium film-flux interface and enter in the flux layer like this, use the flux refining molten aluminium, when the filtration number of times reaches 4 times, dust removal rate reaches 84%, can remove the inclusion more than 7 microns effectively, therefore stir the flux filtration molten aluminium improves the flux removal of impurities from kinetics effect.
Chinese patent CN200680004257.8, non-sodium are flux and utilize it to handle the method for molten aluminium alloy.This patent provides a kind of and has prevented that unreacted flux from adhering to and deposition when injecting the rotation de-gassing vessel with flux, thereby guarantee that the non-sodium that height takes off the slag effect is flux, and a kind of non-sodium of handling molten aluminium alloy is flux and utilizes it to handle the method for molten aluminium alloy.Comprise: keep above-mentioned rotor and be immersed in state in the above-mentioned molten aluminium alloy; To molten metal, spray rare gas element and flux from said nozzle, and with 200～450 rev/mins speed rotor, make inclusion in the molten metal etc. on micro bubble and flux, float to the surface of molten metal, realize the degassing and take off slag.But no matter be that flux injection method or rotor are in conjunction with the flux injection method, its equipment is all complicated, and high purity rare gas element consumption is very big, simultaneously stirring rotator manufacturing cost height, impeller be immersed in for a long time in the molten aluminium and with the molten aluminium friction, be easy to generate the wearing and tearing of material and come off.
Summary of the invention
The purpose of this utility model is: in order to overcome the deficiency of said apparatus, the removal of impurities for before the molten aluminium casting provides a kind of with low cost, dust removal rate height, the flux fluidic device of the molten aluminium removal of impurities that labour intensity is little.
The utility model is achieved in that
A kind of device of removing inclusion in the molten aluminium, comprise lower furnace body, crucible, heating unit, jet pipe, charging opening, median septum and pipeline, lower furnace body is provided with charging opening and pipeline, crucible is installed in the lower furnace body, the lower furnace body periphery is provided with heating unit, it is characterized in that: median septum is provided with upper furnace body, mixing section and heating unit, upper furnace body is provided with intake valve and vent valve, be connected with jet pipe between mixing section and the crucible, seal with the ceramic seal pad between mixing section and the jet pipe.
Above-described mixing section is cylinder or polygon cylindrical shell, and the end of mixing section is a circular arc or flat, and is provided with porose.Mixing removal of impurities mode the best of the mixing section of cylinder and circular arc bottom structure.
The flux fluidic device principle of work of this molten aluminium removal of impurities is: with aluminium furnace charge and employing NaCl, KCl, NaF and Na
3AlF
6In three kinds or four kinds, its mixture fusing point is no more than 700 ℃ flux and places fusing in the crucible, liquid flux is covered on the molten aluminium.Open intake valve and vent valve, in upper furnace body, fill rare gas element,, prevent to enter the molten aluminium and the air catalytic oxidation of mixing section by the air in the vent valve expeling upper furnace body by intake valve.Open variable valve, connect source of the gas, to lower furnace body input exsiccant pressurized air or rare gas element, increase the pressure of lower furnace body, molten aluminium steadily enters mixing section along jet pipe earlier, liquid flux enters mixing section and molten aluminium uniform mixing with mode of jet subsequently, inclusion in the molten aluminium is shifted to liquid flux, when the liquid flux liquid level in the crucible is reduced near the jet pipe ingress, close variable valve, open variable valve, lower furnace body and atmosphere are connected, molten aluminium and liquid flux in the mixing section are back in the crucible along jet pipe under action of gravity, and liquid flux floats on the molten aluminium top again, finishes a working cycle.Such circulation can be carried out repeatedly, until reaching set impurity-eliminating effect.
The beneficial effects of the utility model are:
1, utilize the confined jet effect to carry out the thorough mixing of liquid flux and molten aluminium, the dust removal rate height, the treatment time is short.
2, flux is carried without rare gas element, avoids saving the high purity rare gas element because the too high molten aluminium that causes of gas water content absorbs the phenomenon of hydrogen, and the technology cost is low.
3, this appliance arrangement is simple, and the molten aluminium after the removal of impurities can directly be cast, and need not subcontract.
4, this device processing ease reduces labour intensity, easily is automated control.
5, this device technique process sealing, non-environmental-pollution.
Description of drawings
Fig. 1 is the flux fluidic device structural representation of the molten aluminium removal of impurities of the utility model.
Fig. 2 is process curve figure among the embodiment.
Fig. 3 is the metallograph before the removal of impurities of A357 aluminium alloy.
Fig. 4 is the metallograph after the removal of impurities of A357 aluminium alloy.
Identify among Fig. 1: 1-lower furnace body, 2-heating unit, 3-crucible, 4-molten aluminium, 5-flux, 6-jet pipe, 7-charging opening, 8-median septum, 9-opens jig soon, 10-upper furnace body, 11-intake valve, the 12-vent valve, 13-mixing section, 14-heating unit, 15-ceramic seal pad, 16-sealing-ring, 17-variable valve, the 18-source of the gas, 19-pipeline, 20-variable valve.
Specific implementation method
Below by drawings and Examples the utility model is described further.
Embodiment 1:
Median septum 8 with disassembled and assembled freely in the middle of the body of heater is divided into lower furnace body 1 and upper furnace body 10 with body of heater, be respectively arranged with the mixing section 13 of crucible 3 and employing cylinder and circular arc bottom structure in lower furnace body 1 and the upper furnace body 10, around crucible 3 and the mixing section 13 resistance heating element 2 and 14 are housed, the jet pipe made from carbofrax material between crucible 3 and the mixing section 13 6 is connected, seal with refractory ceramics gasket 15 between mixing section 13 and the jet pipe 6, on, lower furnace body 1 and 10 and median septum 8 between sealing-ring 16 is arranged, open jig 9 soon with upper furnace body 10, lower furnace body 1 and median septum 8 clamp sealing, upper furnace body 10 tops are provided with intake valve 11 and vent valve 12, the furnace wall of lower furnace body 1 is provided with pipeline 19, communicate in one end of pipeline 19 and the lower furnace body 1, the other end and the variable valve 17 that is connected source of the gas 18 be connected with variable valve 20 that atmosphere communicates.
Embodiment 2: in the application of A357 casting alloy removal of impurities
1, processing condition:
The aluminium alloy furnace charge is the A357 alloy, and composition and quality proportioning are: Si:7.06%, Mg:0.48%, Ti:0.14%, Be:0.06%.Aluminium alloy is according to virgin material 30%, foundry returns 70% proportioning.Virgin material is made up of fine aluminium, aluminium silicon master alloy, pure magnesium, aluminium titanium master alloy and aluminium beryllium master alloy, and foundry returns comprises the smear metal after cast gate and rising head and the mechanical workout.
The composition of flux and quality proportioning are: NaCl:40%, KCl:30%, NaF:10% and Na
3AlF
6: 20%.
The mass ratio of aluminium alloy furnace charge and solvent is 2: 1.
2, technological operation:
The aluminium alloy furnace charge is placed in the crucible 3, order of addition(of ingredients) is according to 1/2 foundry returns, aluminium silicon master alloy, fine aluminium, aluminium titanium master alloy and aluminium beryllium master alloy, 1/2 foundry returns drops into successively, and on aluminium alloy furnace charge surface, heating unit 2 work of lower furnace body 1 are heated with the flux spreading, with aluminium alloy furnace charge and flux melts, liquid flux 5 covers on the molten aluminium 4 of fusing, avoids molten aluminium 4 and water vapour reaction, is solidifying back formation hydrogen blistering.When molten aluminium 4 temperature are 710 ℃, be pressed into pure magnesium with bell jar.Median septum 8 is installed, jet pipe 6, ceramic seal pad 15, mixing section 13 and upper furnace body 10 clamp sealing with opening jig 9 soon with upper furnace body 10, lower furnace body 1 and median septum 8, heating unit 14 work of upper furnace body 10, make the temperature of mixing section 13 reach 700 ℃, open intake valve 11 and vent valve 12, in upper furnace body 10, fill inert nitrogen gas by intake valve 11, from the air that vent valve 12 is driven away in the upper furnace body 10, prevent to enter the molten aluminium 4 and air catalytic oxidation of mixing section 12.Open pressurized air or the rare gas element of variable valve 17 to lower furnace body 1 input source of the gas 18 inner dryings, increase the pressure of lower furnace body 1 gradually, the pressure that makes lower furnace body 1 is according to curvilinear motion shown in Figure 2, under the effect of pressure, the molten aluminium 4 that is positioned at crucible 3 steadily flows into mixing section 13 along jet pipe earlier, liquid flux 5 enters mixing section 13 and molten aluminium 4 uniform mixing with mode of jet subsequently, inclusion in the molten aluminium 4 is shifted to liquid flux 5, when liquid flux 5 liquid levels in the crucible 3 are reduced near jet pipe 6 ingress, close variable valve 17, open variable valve 20, lower furnace body 1 is connected with atmosphere, molten aluminium 4 and liquid flux 5 in the mixing section 13 are back in the crucible 3 along jet pipe 6 under action of gravity, and liquid flux 5 floats on molten aluminium 4 tops again, finishes a working cycle.Repeat aforesaid operations 3 times according to shown in Figure 2, can reach set impurity-eliminating effect, after disposing, close variable valve 20, intake valve 11 and vent valve 12, open and open jig 9 soon, take down upper furnace body 10 and mixing section 13, remove with instrument and float over the liquid flux 5 above the molten aluminiums 4 in the jet pipe 6, can carry out casting-up according to the low-pressure casting of routine or counter-pressure casting or other antigravity casting technology.Metallographic structure contrast photo before and after the removal of impurities of A357 aluminium alloy respectively as shown in Figure 3 and Figure 4.
Claims (2)
1. the flux fluidic device of a molten aluminium removal of impurities, comprise lower furnace body (1), crucible (3), heating unit (2), jet pipe (6), charging opening (7), median septum (8) and pipeline (19), lower furnace body (1) is provided with charging opening (7) and pipeline (19), crucible (3) is installed in the lower furnace body (1), lower furnace body (1) periphery is provided with heating unit (2), it is characterized in that: median septum (8) is provided with upper furnace body (10), mixing section (13) and heating unit (14), upper furnace body (10) is provided with intake valve (11) and vent valve (12), be connected with jet pipe (6) between mixing section (13) and the crucible (3), seal with ceramic seal pad (15) between mixing section (13) and the jet pipe (6).
2. the flux fluidic device of molten aluminium removal of impurities according to claim 1 is characterized in that: described mixing section (13) for cylinder or polygon cylindrical shell, the end of mixing section (13) is a circular arc or flat, and is provided with porose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200787409U CN202081152U (en) | 2011-03-23 | 2011-03-23 | Flux jet device for removing impurities from molten aluminum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200787409U CN202081152U (en) | 2011-03-23 | 2011-03-23 | Flux jet device for removing impurities from molten aluminum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202081152U true CN202081152U (en) | 2011-12-21 |
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ID=45341792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200787409U Expired - Lifetime CN202081152U (en) | 2011-03-23 | 2011-03-23 | Flux jet device for removing impurities from molten aluminum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202081152U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102181658A (en) * | 2011-03-23 | 2011-09-14 | 广西大学 | Device and method for removing impurities in aluminum melt |
| CN104070151A (en) * | 2014-06-20 | 2014-10-01 | 江苏神马电力股份有限公司 | Slag discharging device |
| CN114653083A (en) * | 2022-05-25 | 2022-06-24 | 中浩建能源科技(山东)有限公司 | Distillation device for gasoline additive |
-
2011
- 2011-03-23 CN CN2011200787409U patent/CN202081152U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102181658A (en) * | 2011-03-23 | 2011-09-14 | 广西大学 | Device and method for removing impurities in aluminum melt |
| CN102181658B (en) * | 2011-03-23 | 2012-12-19 | 广西大学 | Device and method for removing impurities in aluminum melt |
| WO2012126274A3 (en) * | 2011-03-23 | 2012-12-27 | 广西大学 | Device and method for removing impurities in aluminum melt |
| US9284622B2 (en) | 2011-03-23 | 2016-03-15 | Guangxi University | Device and method for removing impurities in aluminum melt |
| CN104070151A (en) * | 2014-06-20 | 2014-10-01 | 江苏神马电力股份有限公司 | Slag discharging device |
| CN114653083A (en) * | 2022-05-25 | 2022-06-24 | 中浩建能源科技(山东)有限公司 | Distillation device for gasoline additive |
| CN114653083B (en) * | 2022-05-25 | 2022-08-12 | 中浩建能源科技(山东)有限公司 | Distillation device for gasoline additive |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111221 Effective date of abandoning: 20130227 |
|
| RGAV | Abandon patent right to avoid regrant |