CN105803202A - Method for regenerative melting of aluminium scraps with high efficiency, energy saving, and low emission - Google Patents

Method for regenerative melting of aluminium scraps with high efficiency, energy saving, and low emission Download PDF

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Publication number
CN105803202A
CN105803202A CN201410838682.3A CN201410838682A CN105803202A CN 105803202 A CN105803202 A CN 105803202A CN 201410838682 A CN201410838682 A CN 201410838682A CN 105803202 A CN105803202 A CN 105803202A
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China
Prior art keywords
aluminum
bits
aluminium
liquid
well
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CN201410838682.3A
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Chinese (zh)
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刘荣章
何英利
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ALM INDUSTRIAL FURNACE MANUFACTURE SHANGHAI Co Ltd
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ALM INDUSTRIAL FURNACE MANUFACTURE SHANGHAI Co Ltd
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Priority to CN201410838682.3A priority Critical patent/CN105803202A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Abstract

The invention provides a method for regenerative melting of aluminium scraps with high efficiency, energy saving, and low emission. The method is characterized in that the method comprises the following steps: (1) work is prepared before production; (2) side wells (a whirlpool well and an aluminium liquid pump well) are heated, after the furnace condition is well inspected, and the production condition is prepared, ignition and heating are carried out; (3) bottom liquid is added into the side wells, aluminium liquid whose label is identical to the label of the aluminium scraps is added into the side wells, and the volume of the aluminium liquid at least submerges a whirlpool cycle circulating device; (4) aluminium scraps are treated, heavy foreign materials mixed in the aluminium scraps are thrown away from pipelines, a drier separates oil and water, aluminium scraps continue to fall off to a magnet separator in order to separate impurities in Fe, aluminium scraps enter a rotary kiln for drying, the temperate is 350 DEG C, and aluminium scraps are fed into a whirlpool of an aluminium scrap furnace side well through a feeding nozzle for melting. The method has the advantages and active effects that (1) oxidation and burning loss in the aluminium scrap melting process are reduced, and recovery rate metal is improved; (2) quality of aluminium liquid is improved; (3) environmental pollution is reduced; (4) automation degree of equipment is high, and labor intensity of operation personnel is reduced.

Description

A kind of energy-efficient low emission aluminum bits regeneration method of smelting
Technical field
The present invention relates to a kind of energy-efficient low emission aluminum bits regeneration method of smelting, method particularly to the bits regeneration melting of a kind of aluminum, this method considers the feature design of self to be worth doing according to aluminum, it greatly improves the response rate of aluminum bits, decrease the oxidization burning loss of aluminum bits, save the energy, reduce the discharge of flue dust in aluminum bits fusion process.
Background technology
Metallic aluminium is with its superior metallic character, application expanding day, and demand also increases gradually, and the aluminum bits amount produced in the aluminum course of processing that accompanies with it also constantly increases.Aluminum has significantly high recuperability, produces secondary aluminium with aluminium scrap, and in energy-conserving and environment-protective, effect is very prominent.But, secondary aluminium manufacturing enterprise of China is outmoded for the recovery smelting equipment of fines class waste material, energy resource consumption is bigger, oxidization burning loss is serious, such as fluffy aluminum decohere (density is about 0.1-0.2 ton/cubic meter) directly melts down the oxidization burning loss ratio of melting up to more than 50%, produce a large amount of aluminum slag, consume amount of heat simultaneously;Aluminum bits enclosed mass density after packing is about 0.6-1 ton/cubic meter;The oxidization burning loss ratio directly melting down melting is about 30-40%, it is difficult to reaching to reduce the purpose of heat waste, and during oxidization burning loss, can produce substantial amounts of flue dust, this not only causes the waste of limited metals resources, also pollutes the environment.How reducing scaling loss, reduce energy consumption, reduce environmental pollution, the quality of aluminum liquid after raising melting, is that aluminum bits recovery needs key problems-solving.
Through careful analysis, the smelting technology melting formula that aluminum crumb is common, scaling loss is big, and energy consumption is high, the main cause that dust flue gas is big is to be in that: during the melting of 1) common smelting technology, the atmosphere temperature of burner hearth high (1000 DEG C-1100 DEG C), aluminum bits are fluffy, and proportion is little, in input burner hearth, float over the top of aluminum liquid, big with the high-temperature atmosphere contact area in burner hearth, cause violent oxidization burning loss;2) (silt, other metal such as Fe, moisture (cutting fluid, water) content is high for the impurity in aluminum bits.In fusion process, the contaminating impurity aluminum liquid of part, improves energy consumption during melting, and the impurity containing oils also can aggravate the oxidization burning loss of aluminum bits, can discharge substantial amounts of flue dust when scaling loss simultaneously.Therefore urgently improve existing.
Summary of the invention
Present invention aim to address aluminum of the prior art bits regeneration problem existing for method of smelting, it is provided that a kind of energy-efficient low emission aluminum bits regeneration method of smelting.The present invention designs a kind of energy-efficient low emission aluminum bits regeneration method of smelting, it is characterised in that be made up of the following step:
(1) preparation before producing:
Equipment prepares, and checks and confirms that aluminum bits production line all devices is normal,
Raw and auxiliary material prepares, prepare aluminum bits, low ferrum aluminium ingot, magnesium ingot, metallic silicon, titanium agent, Preparation of Metallic Strontium, innocuous refining flux, deslagging agent, high pure nitrogen and aluminium silicate blocking, add alterant, the consumption of degasifier etc. must assure that melting complete after the chemical composition of aluminum liquid and mechanical property should meet the particular provisions that GB/T9438-1999 " aluminium alloy castings ", the standard of GB/T15115-1994 " pack alloy " and our factory formulate according to production technology.
Production utensil prepares, sample spoon, raker stirrer of skimming, fortune aluminum slag bucket car, prepurging shovel, aluminum liquid gravimetry instrument, aluminum liquid transhipment bag and electronic weighbridge;
(2) intensification (the whirlpool well of side well, aluminum liquid pump well), check the working of a furnace is intact possess working condition after, just can firing up, operation order is first to be raised up by eddy circulating device, move on to maintenance position, burner air butterfly valve is reached about 1/5, open burnt gas switch by button ignition switch firing up, heat up after 2 ~ 4h, heat up when air pressure is transferred to 100trrniH20, be hereafter gradually increased quantity combusted and air quantity, aluminum is considered to be worth doing side well and is raised to 800 DEG C, eddy circulating device, eddy current adjustment plate and aluminum bits feeding mouth are installed successively;
(3) side well adds end liquid, adds and aluminum considers the aluminum liquid with label to be worth doing in the well of side, and aluminum liquid measure is at least flood eddy circulating device;
null(4) process of aluminum bits,Aluminum bits are added in feed bin,Aluminum bits consider pulverizer from feed bin end opening to be worth doing through aluminum,The heavier foreign material being mixed into during aluminum is considered to be worth doing throw away along pipeline,Fall in undertaking bucket,Aluminum bits through pulverizing are discharged below pulverizer,Enter filings collecting chamber,Aluminum bits are delivered to drag conveyor by the funnel under filings collecting chamber,Later fall into drier,Drier is by oil-water separation,Aluminum bits continue to fall to magnetic separator,By the magazins' layout of Fe,Aluminum bits enter revolution kiln drying,Temperature is 350 DEG C,Aluminum bits obtain drying and processing,The useless flue gas dried in rotary kiln burns through incinerator,High-temperature tail gas after burning entered heat exchanger heat exchange,Formed after low temperature waste gas enters dedusting and discharge,Dry aluminum bits are discharged from rotary kiln tail end,Enter into screw feeding machine,By feeding mouth aluminum bits are put into fusing in the vortex of aluminum bits furnace side well,Aluminum liquid pump extracts, by passage at the bottom of aluminum liquid, the aluminum liquid melted out whirlpool well,And send into moist closet intensification,The aluminum liquid of insulation enters whirlpool well under the effect of liquid level difference and continues melting aluminum bits.
It is an advantage of the invention that advantage and positive effect thereof:
1), decrease the oxidization burning loss in aluminum bits fusion process, improve the response rate of metal.Adopt the method for smelting of aluminum liquid aluminium coating bits, after aluminum bits put into whirlpool well, under the aluminum liquid rotated drives, sink in aluminum liquid rapidly, decrease aluminum liquid on the one hand and contact with high oven cavity atmosphere, on the other hand, the temperature of aluminum liquid is low (680-780 DEG C), and the scaling loss of aluminum bits is thus greatly reduced;
2), improve the quality of aluminum liquid.By analyzing, the reason of aluminum liquid low quality causing aluminum bits regeneration melting is: 1), the aluminum bits of the various trades mark are mixed in together;2), aluminum bits are mixed into Fe(nut, bolt etc.);3), there is the profit compositions such as substantial amounts of cutting fluid in aluminum bits.In the pretreatment process of aluminum bits, stored by various trade mark aluminum bits point storehouse, magnetic separation, drier, the process equipments such as drying oven, by magazins' layout, it is greatly improved the quality of aluminum liquid, on the other hand, consider to be worth doing in the well fusing stove of side at aluminum, by aluminum liquid pump, aluminum liquid is circulated, also improved the uniformity of aluminum liquid composition.
3), decrease the pollution of environment, improve the operating environment of flushing and casting work.Aluminum bits in pre-treatment by drier, drying oven, the process of incinerator, eliminate the cutting fluid in aluminum bits and water.Meanwhile, well fusing in side decreases the scaling loss of aluminum bits, which reduces the generation of flue dust.
4), the automaticity of equipment is high, decreases the labor intensity of operator.
Accompanying drawing explanation
Accompanying drawing 1 is the process flow diagram of the present invention.
Detailed description of the invention
In Fig. 1, a kind of energy-efficient low emission aluminum bits regeneration method of smelting operating process is as follows:
1, preparation before producing: 1) equipment preparation, check and confirm that whether aluminum bits production line all devices is normal;2) raw and auxiliary material prepares, prepare aluminum bits, low ferrum aluminium ingot, magnesium ingot, metallic silicon, titanium agent, Preparation of Metallic Strontium, innocuous refining flux, deslagging agent, high pure nitrogen and aluminium silicate blocking etc., add alterant, the consumption of degasifier etc. must assure that melting complete after the chemical composition of aluminum liquid and mechanical property should meet the particular provisions that GB/T9438-1999 " aluminium alloy castings ", the standard of GB/T15115-1994 " pack alloy " and our factory formulate according to production technology.
3) produce utensil to prepare, sample spoon, raker stirrer of skimming, fortune aluminum slag bucket car, prepurging shovel, aluminum liquid gravimetry instrument, aluminum liquid transhipment bag and electronic weighbridge etc..
Above-mentioned adjuvant needs according to different material trademarks and processing technique such as die casting, gravitational casting etc., adds different alterant, and refining agent of slagging tap, the time of addition is also different.
2, the intensification (whirlpool well, aluminum liquid pump well) of side well: check the working of a furnace is intact possess working condition after, just can firing up.Operation order is first to be raised up by eddy circulating device, moves on to maintenance position;Burner air butterfly valve is reached about 1/5, opens burnt gas switch by button ignition switch firing up.Heat up after 2 ~ 4h, heat up when air pressure is transferred to 100trrniH20, be hereafter gradually increased quantity combusted and air quantity, aluminum considered to be worth doing side well and is raised to 800 DEG C, eddy circulating device, eddy current adjustment plate and aluminum bits feeding mouth are installed successively.
3. side well adds end liquid, adds and aluminum considers the aluminum liquid with label to be worth doing in the well of side, and aluminum liquid measure is at least flood eddy circulating device.
4.2.4 aluminum bits pre-treatment, adds aluminum bits in feed bin, and by pre-processing device starting button, during pre-treatment, the running route of aluminum bits is: aluminum bits consider pulverizer from feed bin end opening to be worth doing through aluminum, and the heavier foreign material being mixed into during aluminum is considered to be worth doing throw away along pipeline, falls in undertaking bucket;Aluminum bits through pulverizing are discharged below pulverizer, enter filings collecting chamber, and aluminum bits are delivered to drag conveyor by the funnel under filings collecting chamber, later fall into drier, drier is by oil-water separation, and aluminum bits continue to fall to magnetic separator, by the magazins' layout of Fe, aluminum bits enter revolution kiln drying, temperature is 350 DEG C, and aluminum bits obtain drying and processing, and the useless flue gas dried in rotary kiln burns through incinerator, high-temperature tail gas after burning entered heat exchanger heat exchange, is formed after low temperature waste gas enters dedusting and discharges;Dry aluminum bits are discharged from rotary kiln tail end, enter into screw feeding machine, by feeding mouth aluminum bits are put into fusing in the vortex of aluminum bits furnace side well, aluminum liquid pump extracts, by passage at the bottom of aluminum liquid, the aluminum liquid melted out whirlpool well, and send into moist closet intensification, the aluminum liquid of insulation enters whirlpool well under the effect of liquid level difference and continues melting aluminum bits.
The invention solves the big problem of oxidization burning loss during aluminum of the prior art bits melting, by adopting the method for smelting of aluminum liquid aluminium coating bits, the scaling loss of aluminum bits can be controlled less than 5%;nullAdditionally solve the high problem of energy consumption during aluminum of the prior art bits melting,By separating the impurity in aluminum bits,Reduce the scaling loss of aluminum bits,Aluminum bits are preheated,Reduce energy consumption during aluminum bits melting,Also the problem that the quality of aluminum liquid of the prior art is low is solved,Considering the low reason of the aluminum liquid quality regenerating melting to be worth doing by aluminum by analysis is the dust in aluminum bits,Profit,With objectionable impurities such as (Fe,Etc. Cu) it is mixed into and causes,By increasing the pre-treatment of aluminum bits,Separate impurity,Improve the quality of aluminum liquid,Finally solve dust during the aluminum bits melting of prior art,Smog is big,Flushing and casting bad environments,Problem big for environment pollution,By the oil water removal that aluminum is considered to be worth doing,Dry,And the tail gas dried is carried out high temperature incineration,The discharge making tail gas reaches requirement,Dust pelletizing system is installed simultaneously,Can greatly improve the operating environment of blast-furnace man.

Claims (1)

1. an energy-efficient low emission aluminum bits regeneration method of smelting, it is characterised in that be made up of the following step:
(1) preparation before producing:
Equipment prepares, and checks and confirms that aluminum bits production line all devices is normal,
Raw and auxiliary material prepares, prepare to produce raw material: aluminum bits, low ferrum aluminium ingot, magnesium ingot, alterant: metallic silicon, titanium agent, Preparation of Metallic Strontium, degassing refining agent: innocuous refining flux, deslagging agent, high pure nitrogen and aluminium silicate blocking (assistant product), production utensil prepares, sample spoon, raker stirrer of skimming, fortune aluminum slag bucket car, prepurging shovel, aluminum liquid gravimetry instrument, aluminum liquid transhipment bag and electronic weighbridge;
(2) intensification (the whirlpool well of side well, aluminum liquid pump well), check the working of a furnace is intact possess working condition after, just can firing up, operation order is first to be raised up by eddy circulating device, move on to maintenance position, burner air butterfly valve is reached about 1/5, open burnt gas switch by button ignition switch firing up, heat up after 2 ~ 4h, air pressure be transferred to the unit of 100trrniH20(air pressure) time heats up, and is hereafter gradually increased quantity combusted and air quantity, aluminum is considered to be worth doing side well and is raised to 800 DEG C, eddy circulating device, eddy current adjustment plate and aluminum bits feeding mouth are installed successively;
(3) side well adds end liquid, adds and aluminum considers the aluminum liquid with label to be worth doing in the well of side, and aluminum liquid measure is at least flood eddy circulating device;
null(4) process of aluminum bits,Aluminum bits are added in feed bin,Aluminum bits consider pulverizer from feed bin end opening to be worth doing through aluminum,The heavier foreign material being mixed into during aluminum is considered to be worth doing throw away along pipeline,Fall in undertaking bucket,Aluminum bits through pulverizing are discharged below pulverizer,Enter filings collecting chamber,Aluminum bits are delivered to drag conveyor by the funnel under filings collecting chamber,Later fall into drier,Drier is by oil-water separation,Aluminum bits continue to fall to magnetic separator,By the magazins' layout of Fe,Aluminum bits enter revolution kiln drying,Temperature is 350 DEG C,Aluminum bits obtain drying and processing,The useless flue gas dried in rotary kiln burns through incinerator,High-temperature tail gas after burning entered heat exchanger heat exchange,Formed after low temperature waste gas enters dedusting and discharge,Dry aluminum bits are discharged from rotary kiln tail end,Enter into screw feeding machine,By feeding mouth aluminum bits are put into fusing in the vortex of aluminum bits furnace side well,Aluminum liquid pump extracts, by passage at the bottom of aluminum liquid, the aluminum liquid melted out whirlpool well,And send into moist closet intensification,The aluminum liquid of insulation enters whirlpool well under the effect of liquid level difference and continues melting aluminum bits.
CN201410838682.3A 2014-12-30 2014-12-30 Method for regenerative melting of aluminium scraps with high efficiency, energy saving, and low emission Pending CN105803202A (en)

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CN107201451A (en) * 2017-06-16 2017-09-26 浙江鑫耐铝熔铸设备材料有限公司 A kind of aluminium skimmings isothermal melting unit and production technology
CN108020046A (en) * 2018-01-08 2018-05-11 浙江新格有色金属有限公司 Aluminium skimmings drying unit
CN108731483A (en) * 2018-06-27 2018-11-02 苏州中联众信热能科技有限公司 A kind of waste aluminum recovery system
CN108889078A (en) * 2018-09-07 2018-11-27 无锡锦绣轮毂有限公司 A kind of aluminium skimmings drying gas cleaning integrated treatment furnace
CN108913961A (en) * 2018-08-13 2018-11-30 文登皇利压铸化工材料有限公司 The piston aluminium ingot used for turbocharging automobile
CN108998681A (en) * 2017-06-06 2018-12-14 姚晓宁 A kind of aluminium skimmings secondary aluminium rapid melting device
CN109161693A (en) * 2018-10-31 2019-01-08 中信戴卡股份有限公司 A kind of aluminium skimmings melt down device and technique online
CN109930002A (en) * 2019-03-20 2019-06-25 江苏凯特汽车部件有限公司 A kind of aluminum-alloy wheel manufacturing machine processing aluminium skimmings direct reuse preprocessing system
CN111020218A (en) * 2019-12-27 2020-04-17 浙江铂大工贸有限公司 Aluminum skimmings waste liquid recovery processing device
CN112318209A (en) * 2020-10-27 2021-02-05 南京美诚铝业科技有限公司 Machining center for aluminum product
CN113416845A (en) * 2021-04-29 2021-09-21 广元市林丰铝电有限公司 Device and method for manufacturing aluminum castings through recovery of waste aluminum materials

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CN108998681B (en) * 2017-06-06 2024-03-15 保定安保能冶金设备有限公司 Quick melting device of aluminium bits recycled aluminum
CN108998681A (en) * 2017-06-06 2018-12-14 姚晓宁 A kind of aluminium skimmings secondary aluminium rapid melting device
CN107201451A (en) * 2017-06-16 2017-09-26 浙江鑫耐铝熔铸设备材料有限公司 A kind of aluminium skimmings isothermal melting unit and production technology
CN108020046A (en) * 2018-01-08 2018-05-11 浙江新格有色金属有限公司 Aluminium skimmings drying unit
CN108731483A (en) * 2018-06-27 2018-11-02 苏州中联众信热能科技有限公司 A kind of waste aluminum recovery system
CN108913961A (en) * 2018-08-13 2018-11-30 文登皇利压铸化工材料有限公司 The piston aluminium ingot used for turbocharging automobile
CN108889078A (en) * 2018-09-07 2018-11-27 无锡锦绣轮毂有限公司 A kind of aluminium skimmings drying gas cleaning integrated treatment furnace
CN109161693A (en) * 2018-10-31 2019-01-08 中信戴卡股份有限公司 A kind of aluminium skimmings melt down device and technique online
CN109930002B (en) * 2019-03-20 2021-01-01 江苏凯特汽车部件有限公司 Pretreatment system for directly recycling aluminum scraps in machining of aluminum alloy wheel production
CN109930002A (en) * 2019-03-20 2019-06-25 江苏凯特汽车部件有限公司 A kind of aluminum-alloy wheel manufacturing machine processing aluminium skimmings direct reuse preprocessing system
CN111020218A (en) * 2019-12-27 2020-04-17 浙江铂大工贸有限公司 Aluminum skimmings waste liquid recovery processing device
CN111020218B (en) * 2019-12-27 2022-06-21 浙江铂大工贸有限公司 Aluminum skimmings waste liquid recovery processing device
CN112318209A (en) * 2020-10-27 2021-02-05 南京美诚铝业科技有限公司 Machining center for aluminum product
CN113416845A (en) * 2021-04-29 2021-09-21 广元市林丰铝电有限公司 Device and method for manufacturing aluminum castings through recovery of waste aluminum materials

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Application publication date: 20160727