CN102925711A - Jet centrifugal filtration composite purification method of zinc and zinc alloy melt - Google Patents
Jet centrifugal filtration composite purification method of zinc and zinc alloy melt Download PDFInfo
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- CN102925711A CN102925711A CN2012104349597A CN201210434959A CN102925711A CN 102925711 A CN102925711 A CN 102925711A CN 2012104349597 A CN2012104349597 A CN 2012104349597A CN 201210434959 A CN201210434959 A CN 201210434959A CN 102925711 A CN102925711 A CN 102925711A
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Abstract
The invention provides a jet centrifugal filtration composite purification method of zinc and zinc alloy melt. The method includes: a pouring gate is preheated to above 400 DEG C before pouring; a centrifugal device is started, rotation speed of the centrifugal device is in a range of 10-3000r/min, then zinc alloy is poured, and the zinc alloy melt passes through a filtering medium sheet under the effect of centrifugal force and gravity; gas states to be led in after the pouring, and formed bubbles are floated from a central portion of a straight pouring gate. The jet centrifugal filtration composite purification method of the zinc and the zinc alloy melt has substantive features and creativity, the composite purification method of foam ceramic multi-stage centrifugal filtration and a microporous ceramic air blowing plug in the middle is adopted, and the zinc alloy can meet purification requirements of the prior art for zinc alloy casting members completely. The jet centrifugal filtration composite purification method of the zinc and the zinc alloy melt is simple in device, low in cost and free of environment pollution and meets requirements of modern environment-friendly production.
Description
Technical field
The present invention relates to a kind of purifying method, relate in particular to the jet centrifuging combined method for purifying of a kind of zinc and zinc alloy melt.
Background technology
Cleaning molten is the gordian technique that guarantees the alloy material metallurgical quality, and the purpose of zinc alloy cleaning molten mainly is gas content, oxide inclusion and the intermetallic compound that reduces in the melt.Traditional zinc alloy purifies the methods such as leaving standstill clarification, villaumite processing, rare gas element blowing and filtration that can adopt.It is that villaumite is processed that prior art generally adopts solvent refined, and the refining agent main component is NH
4Cl or ZnCl
2Add a small amount of carbonate or nitrate and form, utilize villaumite under the zinc alloy smelting temperature, to gasify and separate out a large amount of microbubbles, impel the interior gas of alloy and inclusion to be attached to bubble floating, reach the purpose of removal.It is boundless and indistinct in factory that this method of refining discharges the pungencys such as zinc chloride, ammonia very strong toxic gas and smog, causes serious environmental pollution, and the harm operator is healthy, and corrosion factory building and equipment are not allowed by modern production.Also have and use fine grain ceramics build-up of particles place mat to become certain thickness strainer to carry out filtration, purification, although this method decontamination effect improving is better, can remove in the ZZnAl4-1 aluminium alloy intermetallic compound of 90% oxide compound nearly and 85%.But install loaded down with trivial detailsly, filtration yield is very little, can only be used for the little Zinc alloy casting cast of tens of kilogram weights.At present, a large amount of zinc alloy furnace external purifying technology are particularly useful for zinc alloy continuous casting and rolling cleaning molten technology, are not yet developed.
Over nearly 40 years, there is multiple ceramic filter medium in the alloy melt purification process, to be used widely, such as foamed ceramics, ceramic honey comb, granular pottery etc., this class filtration medium all is the high efficient filter sound silencing elements that integrate mechanical stop, precipitation seizure, surface adsorption, its decontamination effect improving is then relevant with thickness, aperture and the material of strainer, thickness is larger, the aperture is approximately little, to being mingled with the stronger ceramic filter medium of adsorptive power, decontamination effect improving is better.But the simple foamed ceramics that used thickness is large, the aperture is little, though filter effect is good, be easy to blocked, and because of larger to the metal melt resistance to flow, the pressure head that needs are larger.Centrifuging then is that filtration medium is placed rotatable running channel, by centrifugal force, increases pressure head, makes the zinc alloy melt by the filtration medium of high-density, thick size, realizes centrifuging.Because centrifugal force is a kind of mass force, therefore in centrifuge field, the bubble in the alloy and density are conducive to impurity particle and gas purging less than the tendency that the oriented rotation center of the impurity particle of zinc alloy melt moves, therefore this is a kind of combined method for purifying.Although the air-breathing property of zinc alloy is less, but gas sweetening is to reducing gas content in the zinc alloy melt, thereby reduction alloy fragility, raising alloy strength have good action, the present invention proposes in centrifuging, rotatable running channel center is connect the round shape sprue, arrange the hanging type jet thrust in the sprue bottom periphery, to melt winding-up rare gas element or N
2Gas, the gas that sprays from blowing head forms a large amount of microbubbles, the gas in the melt and some proportion can be taken out of less than the inclusion floating of zinc.Obviously, this is a kind of combined method for purifying that collects multiple purification function.
Summary of the invention
The object of the present invention is to provide the jet centrifuging combined method for purifying of a kind of zinc and zinc alloy melt, in order effectively to reduce the content that is mingled with in zinc or the zinc alloy melt, the present invention adopts the combined method for purifying that adds the gas winding-up at the sprue center of centrifuging.
The present invention is achieved like this, method steps is: 1) make rotatable metal running channel with high temperature alloy, this running channel is placed on the centrifugal device, place pieces of filter media in the running channel exit passageway, filtration medium is stacked in the exit passageway by the order of gross porosity to pore by filter pore lyriform pore footpath size from the inside to the outside, and the thickness summation of pieces of filter media is at 20mm-300mm; When 2) rotatable metal running channel was placed in centrifugal device, its sprue axis overlapped with the centrifugal device rotation; 3) in the sprue of rotatable running channel, place ventpipe, and vent peg is arranged that circlewise hanging on sprue bottom ventilation pipe does not have any contact with the rotation running channel with vent peg; 4) before the cast running channel is preheated to more than 400 ℃; 5) start centrifugal device, then the centrifugal device speed of rotation pours into a mould zinc alloy in 10～3000r/min scope, and the zinc alloy melt will pass through pieces of filter media under centrifugal force and action of gravity; 6) namely begin to pass into gas after the cast, the formation bubble is floated by the sprue centre.
Pieces of filter media can be 1) various foamed ceramicses; 2) various ceramic honey combs; 3) various granular potteries; 4) various metal screens, Steel Wool.
Gas can be N
2Or various rare gas elementes.
The present invention has substantive distinguishing features and initiative, the combined method for purifying that the micropore ceramics purge plug that adopts the centrifugal cascade filtration of foamed ceramics to add the middle part carries out, make zinc alloy reach prior art fully to the purification requirement of Zinc alloy casting, device is simple, with low cost, and complete non-environmental-pollution, meet modernized green production requirement.
Description of drawings
Fig. 1 is structural representation of the present invention.
In the drawings, 1, inlet pipe 2, jet plug 3, bearing 4, electric motor 5, holding furnace 6, rotatable metal running channel 7, running channel chute 8, afflux groove 9, pieces of filter media.
Embodiment
As shown in Figure 1, the device that the inventive method need to be used comprises inlet pipe, jet plug, bearing, electric motor, holding furnace, rotatable metal running channel, the running channel chute, afflux groove, pieces of filter media, holding furnace 5 interior centers are placed with rotatable metal running channel 6, rotatable metal running channel 6 bottoms are through bearing 3 coaxial connection electric motor 4, be connected with pieces of filter media 9 in the cross gate of rotatable metal running channel 1, metal liquid enters 7 through pieces of filter media 9, the water outlet of running channel chute 7 connects afflux groove 8, the center of rotatable metal running channel 1 is connected with several jet plugs 2, and jet plug 2 connects inlet pipe 1.
Method steps is: 1) make rotatable metal running channel with high temperature alloy, this running channel is placed on the centrifugal device, place pieces of filter media in the running channel exit passageway, filtration medium is stacked in the exit passageway by the order of gross porosity to pore by filter pore lyriform pore footpath size from the inside to the outside, and the thickness summation of pieces of filter media is at 20mm-300mm; When 2) rotatable metal running channel was placed in centrifugal device, its sprue axis overlapped with the centrifugal device rotation; 3) in the sprue of rotatable running channel, place ventpipe, and vent peg is arranged that circlewise hanging on sprue bottom ventilation pipe does not have any contact with the rotation running channel with vent peg; 4) before the cast running channel is preheated to more than 400 ℃; 5) start centrifugal device, then the centrifugal device speed of rotation pours into a mould zinc alloy in 10～3000r/min scope, and the zinc alloy melt will pass through pieces of filter media under centrifugal force and action of gravity; 6) namely begin to pass into gas after the cast, the formation bubble is floated by the sprue centre.
Pieces of filter media can be 1) various foamed ceramicses; 2) various ceramic honey combs; 3) various granular potteries; 4) various metal screens, Steel Wool.
Gas can be N
2Or various rare gas elementes.
Claims (3)
1. jet centrifuging combined method for purifying of zinc and zinc alloy melt, it is characterized in that method steps is: 1) make rotatable metal running channel with high temperature alloy, this running channel is placed on the centrifugal device, place pieces of filter media in the running channel exit passageway, filtration medium is stacked in the exit passageway by the order of gross porosity to pore by filter pore lyriform pore footpath size from the inside to the outside, and the thickness summation of pieces of filter media is at 20mm-300mm; When 2) rotatable metal running channel was placed in centrifugal device, its sprue axis overlapped with the centrifugal device rotation; 3) in the sprue of rotatable running channel, place ventpipe, and vent peg is arranged that circlewise hanging on sprue bottom ventilation pipe does not have any contact with the rotation running channel with vent peg; 4) before the cast running channel is preheated to more than 400 ℃; 5) start centrifugal device, then the centrifugal device speed of rotation pours into a mould zinc alloy in 10～3000r/min scope, and the zinc alloy melt will pass through pieces of filter media under centrifugal force and action of gravity; 6) namely begin to pass into gas after the cast, the formation bubble is floated by the sprue centre.
2. the jet centrifuging combined method for purifying of zinc and zinc alloy melt according to claim 1 is characterized in that pieces of filter media can be 1) various foamed ceramicses; 2) various ceramic honey combs; 3) various granular potteries; 4) various metal screens, Steel Wool.
3. the jet centrifuging combined method for purifying of zinc and zinc alloy melt according to claim 1 is characterized in that gas can be N
2Or various rare gas elementes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104349597A CN102925711A (en) | 2012-11-05 | 2012-11-05 | Jet centrifugal filtration composite purification method of zinc and zinc alloy melt |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104349597A CN102925711A (en) | 2012-11-05 | 2012-11-05 | Jet centrifugal filtration composite purification method of zinc and zinc alloy melt |
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| Publication Number | Publication Date |
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| CN102925711A true CN102925711A (en) | 2013-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012104349597A Pending CN102925711A (en) | 2012-11-05 | 2012-11-05 | Jet centrifugal filtration composite purification method of zinc and zinc alloy melt |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104988326A (en) * | 2015-07-30 | 2015-10-21 | 何明亮 | Filtering medium, preparation method thereof, and purifier with filtering medium |
| RU2585874C2 (en) * | 2015-01-20 | 2016-06-10 | Виталий Евгеньевич Дьяков | Method of refining hard zinc by centrifugal filtration and device therefor |
-
2012
- 2012-11-05 CN CN2012104349597A patent/CN102925711A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2585874C2 (en) * | 2015-01-20 | 2016-06-10 | Виталий Евгеньевич Дьяков | Method of refining hard zinc by centrifugal filtration and device therefor |
| CN104988326A (en) * | 2015-07-30 | 2015-10-21 | 何明亮 | Filtering medium, preparation method thereof, and purifier with filtering medium |
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Application publication date: 20130213 |