CN201787808U - Aluminium scrap recovery furnace - Google Patents
Aluminium scrap recovery furnace Download PDFInfo
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- CN201787808U CN201787808U CN2010202931664U CN201020293166U CN201787808U CN 201787808 U CN201787808 U CN 201787808U CN 2010202931664 U CN2010202931664 U CN 2010202931664U CN 201020293166 U CN201020293166 U CN 201020293166U CN 201787808 U CN201787808 U CN 201787808U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The utility model discloses an aluminium scrap recovery furnace, which comprises an aluminium melting furnace and a wellbore arranged by the side of the aluminium melting furnace, and a heating system which is used for heating the aluminium melting furnace and the wellbore, wherein a feed pipe and a return pipe are arranged between the aluminium melting furnace and the wellbore, aluminium liquid in the aluminium melting furnace enters the wellbore via the feed pipe, the aluminium liquid in the wellbore flows back into the aluminium melting furnace via the return pipe, and a circulating pump for boosting the aluminium liquid to flow is arranged on the feed pipe. The utility model has the advantages that the recovery furnace effectively reduces oxidation burning loss, improves the metal yield, efficiently saves energy, can realize continuous feed production, improves the aluminium scrap processing efficiency of the aluminium melting furnace, meets the requirements of the current market, not only has a good economic benefit, but also has obvious energy-saving and environmental-friendly advantages.
Description
Technical field
The utility model relates to aluminium bits reclaimer, particularly a kind of side well formula aluminum scrap recovery furnace.
Background technology
Metallic aluminium is with its superior characteristic, and the utilization field enlarges day by day, and demand also increases gradually.Aluminium also has very high recuperability except having superior metal operating characteristic, the benefit of regeneration is bigger.Compare with producing primary aluminum, producing secondary aluminium has obvious advantage aspect environmental protection.Produce secondary aluminium by the aluminium scrap material, CO2 emissions are produced primary aluminum than water, electricity and are reduced 91%, reduce more than 97% than producing primary aluminum with the fuel oil generating, and the smelting of aluminium scrap processing can be saved a large amount of energy resource consumptions.As seen secondary aluminium is compared with primary aluminum production, has energy consumption low, discharges few advantage; Moreover under the identical condition of output, the investment of founding the factory of producing secondary aluminium is only for producing 1/10th of primary aluminum, and reduction effect is remarkable.Therefore, the regeneration techniques of greatly developing aluminium is necessary.
China is one of maximum in the world aluminium production and consumption state; improve the utilization rate of secondary aluminium; not only can improve the nonferrous metal resource utilization rate; and can reduce pollution; preserve the ecological environment; the metals resources of saves valuable all will play positive role to creating social civilization and promoting technological progress.In addition, mineral resources are non-renewable, mean with any just a little lessly, and China is the country of nonferrous metal resource shortage, save and the meaning of making rational use of resources very great.
Secondary aluminium reclaims and to comprise two parts: the one, and the leftover bits that produce in processing enterprise's production process, because aluminium processing material integrated yield only 70%, the waste material amount is very big, for example aluminium bits of producing of the waste material of some crops dockings, machined or the like.China generally all returns production system and reuses; The 2nd, the useless assorted aluminium of society's savings.Wherein the aluminium bits are scrap that aluminium processing enterprise produces in process of production, aluminium ingot (perhaps aluminium bar) in the middle of the aluminium machining process needs to mill face before carrying out hot rolling handles, thick for the ingot mill surface amount at 15～20mm, milling the bits amount is 10～15% of output, and when aluminium casting carried out machining, smear metal accounts for 20% of casting weight, is up to about 30%, this shows that the process of manufacture of aluminium will produce a large amount of aluminium bits.Along with the continuous increase of aluminium output in recent years, the aluminium bits amount that produces together also is sizable with it.
The recovery smelting technology of aluminium bits, being different from general relatively large aluminium scrap reclaims, the aluminium bits are lighter, and area is bigger, is very easily blown afloat oxidation by flame during fusing, sometimes the highest burn out rate is more than 70%, cause the regeneration rate lower, how to reduce scaling loss, improve the rate of recovery of aluminium, being that the aluminium bits reclaim the problem that needs emphasis to solve, also is main difficult point problem.Will cause serious oxidization burning loss if method of smelting is improper, not only waste energy but also contaminated environment.The general processing mode that adopts of present aluminum fabrication plant is, the packing of aluminium bits is squeezed into to add in the stove behind the piece melts, and reduces much though handle like this than the aluminium bits are directly added working chamber's oxidization burning loss, and burn out rate is still up to 10～15%.The aluminium valency reaches about 12000 yuan/ton in the market, research and develop a kind of aluminium efficient, the suboxides scaling loss and consider smelting equipment to be worth doing, recycle aluminium ingot and mill the aluminium bits that produce in the face process, not only can reduce aluminium process production cost, has good economic benefit, and 1 ton of secondary aluminium of every production can save 95% the energy, and energy-conserving and environment-protective have remarkable social benefit.
Domestic bigger waste material enterprise returns to carry out remelting in the upper level smelting equipment, and it is common molten aluminium stove or the molten aluminium stove of crucible type induction that waste material that remaining is less and aluminium bits then adopted more.The advantage of common molten aluminium stove in the aluminium fusion process is that productivity ratio is high slightly, but labor strength is big, and because great majority adopt flame directly to heat, cause the very easily oxidized burning of aluminium bits, cause burn out rate too high, the rate of recovery is low, adopts the rate of recovery of this mode aluminium bits to have only about 70% usually.Adopt devices such as mechanical pump, permanent magnetism mixer, magnetic stirrer to make the aluminium liquid of molten aluminium stove aluminium bits dog-house produce vortex for the application that is used for melting the aluminium bits covering smelting technology that reclaims the aluminium bits specially, the aluminium bits are rendered in the aluminium liquid vortex more, and quilt is melted to be taken away.But all there are some shortcomings in these methods.
Mechanical pump: the operation principle of this method is pumped aluminium liquid by mechanical pump exactly, when this method of use is carried out the recovery of aluminium bits, because machinery need directly be contacted with high temperature aluminum liquid by pump, so the service life of mechanical pump is shorter, and the maintenance cost of equipment is very high, can't destroy the oxide-film on aluminium surface during equipment work at material charging region, and the aluminium bits are not easy to be wrapped up rapidly by aluminium liquid, therefore oxidized easily, form scaling loss.
Permanent magnetic stirrer: the structure of permanent magnetism agitating device mainly is divided into three parts, and the one, permanent magnet, the one, drive the mechanical part that permanent magnet rotates, do not demagnetize in order to ensure permanent magnet in addition and must use cooling system because of temperature is high.Because furnace bottom is generally thicker, must use the very big permanent magnet of volume and weight in order to produce enough big magnetic field, the magnetic field that permanent magnet produces is stationary magnetic field, can not do work to aluminum melt, the permanent magnetism agitating device is in order to produce rotating excitation field, must rely on mechanical device to provide rotary power for permanent magnet, because permanent magnet weight is in ton, this is the parts that weight is heavier and take regular exercise, mechanical device moves throughout the year, the unavoidable damage, maintenance load is big, and it is inevitable that influence is produced.And actual centrifugation, impossible the even of liquation chemical composition of realizing of belonging to of the stirring of permanent magnetism.In addition, permanent magnetism just postbacks during high temperature and gives birth to the demagnetization phenomenon the comparison sensitivity of temperature, therefore needs strict control bottom temperature.
Magnetic stirrer: with the operation principle of this method is to produce magnetic field by heavy current effect conductor, and the variation through magnetic field makes magnetic field act on aluminium liquid effectively, make the aluminium liquid rotation in the dog-house, the problem that this equipment exists is, the prerequisite that electromagnetic generator produces high-intensity magnetic field is to pass through heavy current, and heavy current will inevitably produce very big heat during by conductor, so the electromagnetism magnetic flux generator must dispose good cooling system.The magnetic force that electromagnetic generator produces need drive aluminum liquid movement in the whole reinforced well, and energy needed is big, equipment volume is huge, energy consumption is high.
Cutting down the consumption of energy and improving recovery rate of iron is the basic demand that development aluminium is considered stove to be worth doing, but only accomplish that these are far from being enough, environmental issue in the external suitable attention regenerated metal process, therefore latest development trend is efficient, clean and environment-friendly, requirement is melting aluminium bits efficiently, will handle the pollution problem in fusion process simultaneously well.China secondary aluminium manufacturing enterprise, production scale is little, and smelting equipment is outmoded, so energy resource consumption is bigger, the fusion process scaling loss is bigger, and the oxidization burning loss of especially considering the thin light waste material of class to be worth doing is just more serious, this not only causes the waste of limited metals resources, but also has seriously polluted environment.By contrast, Britain EMP electromagnetic pump technology just has very big advantage, yet " heart " position of aluminium bits stove is the heavy fusing device of aluminium bits, the present dependence on import of this equipment, though therefore this type of furnace is having very big advantage aspect the melting of aluminium bits, but there is the bigger problem of import equipment financial need amount, promotes the use of and have certain degree of difficulty, if can realize the production domesticization of this equipment, can effectively reduce equipment cost, provide Equipment Foundations for improving domestic aluminium bits disposal ability and technological level.
The utility model content
Problem to be solved in the utility model just provides a kind of rational in infrastructure, simple and practical aluminum scrap recovery furnace, has effectively improved recovery rate of iron, has increased secondary aluminium output, reduces environmental pollution.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme: a kind of aluminum scrap recovery furnace, it is characterized in that: comprise molten aluminium stove and be located at molten aluminium stove side well on one side, and to melting the heating system that aluminium stove and side well heat, between molten aluminium stove and side well, be provided with feed pipe and return duct, aluminium liquid in the molten aluminium stove enters into the side well by feed pipe, and the aluminium liquid in the side well is got back in the molten aluminium stove by return line flow, is provided with the circulating pump that promotes that aluminium liquid flows on feed pipe.Aluminium liquid under the promotion of circulating pump between molten aluminium stove and reinforced well reciprocation cycle flow, make everywhere aluminium water quality ground homogenising to have reduced or eliminated thermal stratification simultaneously.
Further, described side well comprises the side well body that is located on the support and is located at the well lid on side well body top, in side well body, be provided with cylindrical reinforced well, one end of feed pipe is connected on the sidewall of reinforced bottom, one end of return duct is connected on the end face of reinforced shaft bottom, and well lid is provided with charge door.Can dispose the autofeed device on the charge door and carry out friction feeding.
Further, be provided with arc transition between the side of described reinforced well and the bottom face.Be convenient to aluminium liquid and flow, aluminium liquid can not accumulated.
Further, the upper end of described side well body is provided with the exhaust opening that is communicated with the well that feeds in raw material, and is connected to smoke exhaust pipe on the exhaust opening, and the smoke exhaust pipe top is provided with enclosure, and the lower end of side well body is provided with the breast hole that is communicated with the well that feeds in raw material.
Further, described well lid is provided with the attemperating unit of the reinforced well temperature of observing and controlling.
Further, the end that is communicated with reinforced well of described feed pipe is provided with spiral section.Produce when making aluminium liquid enter reinforced well and necessarily entrainment the aluminium liquid vortex of ability, flowing simultaneously can not be too fierce, and it is oxidized to prevent that aluminium liquid is exposed in the air too much.
Further, the other end of described feed pipe is connected the bottom of molten aluminium stove, and the other end of return duct is connected the bottom of molten aluminium stove.Be convenient to that aluminium liquid circulates completely in the molten aluminium stove.
Further, described return duct is provided with the temp-sensing device of measuring temperature of aluminum liquid, and temp-sensing device links to each other with attemperating unit.Realize the tandem control of reinforced well and temperature of aluminum liquid.
Further, described temp-sensing device comprises the thermocouple that is inserted on the backflow tube wall, and the induction end of thermocouple stretches in the return duct and contacts with aluminium liquid, and the link of thermocouple links to each other with attemperating unit.Thermocouple is simple and practical, and the speed of measuring temperature is fast, the precision height.
Further, described circulating pump is an electromagnetic pump.To temperature-insensitive, cost is low, energy consumption is low.
After adopting technique scheme, the utlity model has following advantage: effectively reduce oxidization burning loss, improve recovery rate of iron, energy-efficient; Can realize continuous charging production, improve smelting furnace aluminium bits treatment effeciency; The needs that meet current market not only have good economic benefit, and have tangible energy-saving and environmental protection advantage.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing:
Fig. 1 is the structural representation of a kind of embodiment of the utility model;
Fig. 2 is an A-A cutaway view among Fig. 1;
Fig. 3 is a C-C cutaway view among Fig. 1.
The specific embodiment
The structural representation of a kind of embodiment of the utility model as shown in Figures 1 to 3, a kind of aluminum scrap recovery furnace, comprise molten aluminium stove 1 and be located at molten aluminium stove side well 2 on one side, and to melting the heating system that aluminium stove and side well heat, between molten aluminium stove and side well, be provided with feed pipe 3 and return duct 4, aluminium liquid in the molten aluminium stove enters into the side well by feed pipe, aluminium liquid in the side well is got back in the molten aluminium stove by return line flow, on feed pipe, be provided with the circulating pump 5 that promotes that aluminium liquid flows, circulating pump adopts electromagnetic pump, and molten aluminium stove is provided with the tap hole 11 of discharging aluminium liquid; The side well comprises side well body 21 that is located on the support 23 and the well lid 22 that is located at side well body top, in side well body, be provided with cylindrical reinforced well 211, one end of feed pipe is connected on the sidewall of reinforced bottom, the other end of feed pipe is connected the bottom of molten aluminium stove, one end of return duct is connected on the end face of reinforced shaft bottom, and the other end of return duct is connected the bottom of molten aluminium stove; Well lid is provided with charge door 221, be provided with arc transition 212 between the side of reinforced well and the bottom face, the upper end of side well body is provided with the exhaust opening 213 that is communicated with the well that feeds in raw material, be connected to smoke exhaust pipe 214 on the exhaust opening, the smoke exhaust pipe top is provided with enclosure 215, the lower end of side well body is provided with the breast hole 216 that is communicated with the well that feeds in raw material, and well lid is provided with the attemperating unit 222 of the reinforced well temperature of observing and controlling; An end that is communicated with reinforced well at feed pipe is provided with spiral section 31.Be provided with the temp-sensing device 41 of measuring temperature of aluminum liquid in addition on return duct, temp-sensing device comprises the thermocouple that is inserted on the backflow tube wall, and the induction end of thermocouple stretches in the return duct and contacts with aluminium liquid, and the link of thermocouple links to each other with attemperating unit.
In the foregoing description, the heating system that molten aluminium stove and side well are heated can adopt electrical heating or flame heat; The furnace lining of molten aluminium stove and side well will be chosen suitable refractory material, satisfies under the service condition of a large amount of long-term agitation cycle of aluminium liquid, still can satisfy the normal use of given operating mode; Most important to the control of temperature of aluminum liquid in addition, should guarantee that reinforced well receives maximum heat, guarantee that again aluminium liquid is unlikely to overheated, therefore, temperature control method adopts " tandem control ", monitors the temperature of reinforced well and aluminium liquid respectively by attemperating unit and temp-sensing device, along with reinforced well temperature raises, the temperature of aluminium liquid also and then raises, and when the temperature of reinforced well reached artificial setting value, temperature control changed aluminium liquid temperature control mode over to.After adopting tandem control, the heat that makes molten aluminium stove and side well attract can reach maximum and aluminium liquid also is unlikely to overheated, when improving the quality of products, has prolonged the service life of molten aluminium stove and side well.Circulating pump is installed on the feed pipe, makes things convenient for replacing, maintenance, the maintenance of circulating pump.Configuration autofeed device carries out friction feeding on charge door, can realize producing continuously reinforced production, improve smelting furnace aluminium bits treatment effeciency, seal charging gear simultaneously, satisfy environmental requirement, reduce environmental pollution, and melted aluminium liquid emitted by tap hole carry out next step operation, make the liquid level of aluminium liquid in molten aluminium stove and the side well remain on the certain level height, shown in I place dotted line in Fig. 2 and 3.
Also have some problems that should be noted that in addition, to in molten aluminium stove, carry out such as the scarfing cinder process as far as possible, sediment is also stayed as far as possible and is melted in the aluminium stove in the stove, and too much aluminium slag not only can influence the work of electromagnetic pump, and the aluminium slag enters molten the sinking that reinforced well swims in aluminium liquid surface meeting influence adding aluminium bits.If drop into the aluminium bits not through handling early stage, its inside may be mixed with a large amount of combustibles, pollutant, so adopt closed feeding structure, before the feeding, the waste heat flue gas that utilizes the side well to produce carries out drying and preheating to material, not only energy savings but also reduced environmental pollution was really built up side well stove the equipment of environment-friendly and energy-efficient.
The utility model is put into the aluminium bits and is in the mobile fast aluminium liquid of swirl shape, the aluminium bits are entrainmented covering by aluminium liquid fast, rely on the heat of aluminium liquid that the aluminium bits are melted, thereby have reduced the oxidization burning loss of aluminium bits under the condition of high temperature, improve recovery rate of iron, increased output; In addition, aluminium liquid under the promotion of circulating pump between molten aluminium stove and reinforced well reciprocation cycle flow, make everywhere aluminium water quality ground homogenising to have reduced or eliminated thermal stratification simultaneously.Because fusion process is to carry out, and has reduced the generation of salt slag and the pollution of alloy, have high yield, characteristic that energy consumption is low simultaneously under the environment that aluminium liquid surrounds.
The oxidization burning loss that the equipment that the utility model provides is considered aluminium to be worth doing fusion process is reduced to below 4%, has reduced about 10% than the packing melting technique, has effectively improved recovery rate of iron; The aluminum current bits adopt 1 ton of aluminium bits of aluminium bits stove melting can save 0.1 ton on metal according to 1.2 ten thousand yuan/ton, produce 1 ton of secondary aluminium simultaneously, energy consumption≤210 * 10
4KJ/ (tAl) compares saving 95% energy with producing 1 ton of primary aluminum, can economize on water 10.05 tons, discharges 0.8 ton of carbon dioxide, 0.6 ton of sulfur dioxide less.As seen, the utility model not only has good economic benefit, and has tangible energy-saving and environmental protection advantage, is an energy conservation project that benefit is huge.
Claims (10)
1. aluminum scrap recovery furnace, it is characterized in that: comprise molten aluminium stove (1) and be located at molten aluminium stove side well (2) on one side, and to melting the heating system that aluminium stove and side well heat, between molten aluminium stove and side well, be provided with feed pipe (3) and return duct (4), aluminium liquid in the molten aluminium stove enters into the side well by feed pipe, aluminium liquid in the side well is got back in the molten aluminium stove by return line flow, be provided with the circulating pump (5) that promotes that aluminium liquid flows on feed pipe, molten aluminium stove is provided with the tap hole (11) of discharging aluminium liquid.
2. a kind of aluminum scrap recovery furnace according to claim 1, it is characterized in that: described side well comprises the side well body (21) that is located on the support (23) and is located at the well lid (22) on side well body top, in side well body, be provided with cylindrical reinforced well (211), one end of feed pipe is connected on the sidewall of reinforced bottom, one end of return duct is connected on the end face of reinforced shaft bottom, and well lid is provided with charge door (221).
3. a kind of aluminum scrap recovery furnace according to claim 2 is characterized in that: be provided with arc transition (212) between the side of described reinforced well and the bottom face.
4. a kind of aluminum scrap recovery furnace according to claim 2, it is characterized in that: the upper end of described side well body is provided with the exhaust opening (213) that is communicated with the well that feeds in raw material, be connected to smoke exhaust pipe (214) on the exhaust opening, the smoke exhaust pipe top is provided with enclosure (215), and the lower end of side well body is provided with the breast hole (216) that is communicated with the well that feeds in raw material.
5. a kind of aluminum scrap recovery furnace according to claim 2 is characterized in that: described well lid is provided with the attemperating unit (222) of the reinforced well temperature of observing and controlling.
6. a kind of aluminum scrap recovery furnace according to claim 1 and 2 is characterized in that: the end that described feed pipe is communicated with reinforced well is provided with spiral section (31).
7. a kind of aluminum scrap recovery furnace according to claim 1 and 2 is characterized in that: the other end of described feed pipe is connected the bottom of molten aluminium stove, and the other end of return duct is connected the bottom of molten aluminium stove.
8. according to claim 1,2 or 5 described a kind of aluminum scrap recovery furnaces, it is characterized in that: described return duct is provided with the temp-sensing device (41) of measuring temperature of aluminum liquid, and temp-sensing device links to each other with attemperating unit.
9. a kind of aluminum scrap recovery furnace according to claim 8 is characterized in that: described temp-sensing device comprises the thermocouple that is inserted on the backflow tube wall, and the induction end of thermocouple stretches in the return duct and contacts with aluminium liquid, and the link of thermocouple links to each other with attemperating unit.
10. a kind of aluminum scrap recovery furnace according to claim 1 is characterized in that: described circulating pump is an electromagnetic pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202931664U CN201787808U (en) | 2010-08-12 | 2010-08-12 | Aluminium scrap recovery furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202931664U CN201787808U (en) | 2010-08-12 | 2010-08-12 | Aluminium scrap recovery furnace |
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| CN201787808U true CN201787808U (en) | 2011-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010202931664U Expired - Fee Related CN201787808U (en) | 2010-08-12 | 2010-08-12 | Aluminium scrap recovery furnace |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915501A (en) * | 2010-08-12 | 2010-12-15 | 浙江浩大工业炉有限公司 | Aluminum scrap recovery furnace |
| CN102382985A (en) * | 2011-10-11 | 2012-03-21 | 岳阳钟鼎热工电磁科技有限公司 | Thin aluminum material recovery melting device |
| CN103045867A (en) * | 2012-10-19 | 2013-04-17 | 保定安保能冶金设备有限公司 | Automatic melting ferro-aluminium chamber furnace of recycled aluminium |
| CN103966468A (en) * | 2013-01-24 | 2014-08-06 | 秦皇岛开发区美铝合金有限公司 | Aluminium alloy chip re-melting reutilization technology |
-
2010
- 2010-08-12 CN CN2010202931664U patent/CN201787808U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915501A (en) * | 2010-08-12 | 2010-12-15 | 浙江浩大工业炉有限公司 | Aluminum scrap recovery furnace |
| CN102382985A (en) * | 2011-10-11 | 2012-03-21 | 岳阳钟鼎热工电磁科技有限公司 | Thin aluminum material recovery melting device |
| CN103045867A (en) * | 2012-10-19 | 2013-04-17 | 保定安保能冶金设备有限公司 | Automatic melting ferro-aluminium chamber furnace of recycled aluminium |
| CN103045867B (en) * | 2012-10-19 | 2015-12-16 | 保定安保能冶金设备有限公司 | Secondary aluminum melts ferro-aluminum parting furnace automatically |
| CN103966468A (en) * | 2013-01-24 | 2014-08-06 | 秦皇岛开发区美铝合金有限公司 | Aluminium alloy chip re-melting reutilization technology |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110406 Termination date: 20110812 |