CN1396282A - Equipment for preparing regenerated fluoride salt or alumina from waste of aluminium electrolysis - Google Patents
Equipment for preparing regenerated fluoride salt or alumina from waste of aluminium electrolysis Download PDFInfo
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- CN1396282A CN1396282A CN02132469A CN02132469A CN1396282A CN 1396282 A CN1396282 A CN 1396282A CN 02132469 A CN02132469 A CN 02132469A CN 02132469 A CN02132469 A CN 02132469A CN 1396282 A CN1396282 A CN 1396282A
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
An apparatus for prepairng the regenerated fluoride salt and alumina from the waste generated by aluminium electrolysis is an improvement to the patent ZL96115111.0, and features that an additional crush-screen system composed hammer crusher and sieve set is used in the front of the said apparatus. Its advantages are low consumption of electric energy, no secondary pollution, high recovery rate and high quality of products.
Description
(1) technical field
The present invention relates to a kind of device that adopts the pyrogenic process fluidized-bed roasting process to handle the solid waste that produces in the non-ferrous metal production---produce the device of regenerated fluoride salt, aluminum oxide with waste of aluminium electrolysis, the suitable processing of this device to aluminium electrolyzing carbon slag, waste cathode carbon block, casting aluminium ash, aluminium electrolytic flue ash, dirty material, adsorptive pitch aluminum oxide, insulation filler the like waste, the renewable fluoride salt of above-mentioned waste, aluminum oxide through this device is handled make it to be reused for the production of electrolysis of aluminum.
(2) background technology
At present, the smelting of countries in the world metallic aluminium mainly is to adopt Hall---the fused salt electrolysis explained hereafter of Ai Lufa, because of the anode and the negative electrode of its electrolyzer all is carbon product, again because the effect in fused salt and magnetic field will be discharged about waste residue 50kg such as anodic carbon residue, waste cathode carbon block one ton of aluminium of every production from electrolyzer.With Fushun Aluminium Works is example, and year above-mentioned waste residue piece of discharging has 8000 tons approximately.The stacking of these industrial refuses or bury owing to be subjected to factor effects such as wind and rain washes away, underground water immersion for a long time, cause the decomposition stripping of fluorochemical, prussiate and causes the pollution of ecotope.For many years both at home and abroad many experts of aluminium metallurgy industry to this proposition with implemented all treatment processs, as use reverberatory furnace, converter, the general pyrogenic attack of liquid-solid phase-splitting stove etc., the pyrogenic attack technology (ZL96115111.0) of the fluidizing reactor released of Fushun Aluminium Works particularly, utilize main, the residual heat complementary of secondary stove, make material self-heating closed cycle roasting in this device, flue dust to discharging in the process aluminum electrolytic production, dirty material, solid waste such as adsorptive pitch aluminum oxide make it regenerating oxidation aluminium, aluminum fluoride, Sodium Fluoride is used for the production of electrolysis of aluminum again, has obtained appreciable economic benefit and social benefit.But, in production practice, find, owing to be subjected to the restriction of above-mentioned Patent equipment furnace binding, also have problems for the fluoride salt, the aluminum oxide that reclaim in the waste residues such as the anodic carbon residue that discharged in the Aluminium Electrolysis, waste cathode carbon block: block wastes such as the anodic carbon residue that discharges in the Aluminium Electrolysis, waste cathode carbon block are in the ZL96115111.0 device during roasting, the igniting required time reaches 3 hours, and is unfavorable to suitability for industrialized production; Easy smelting furnace sintering in roasting, making it can not automatic discharge; Its air distribution plate life cycle is short, and easy burn-out influences production efficiency.
(3) summary of the invention
The objective of the invention is on the basis of ZL96115111.0 patent, it to be carried out creationary improvement, provide a kind of proportion of can handling at 1 gram/cm
3About the aluminium electrolytic flue ash the like waste of dust-like, can handle proportion again at 3 gram/cm
3About and electrolysis of aluminum waste residue such as the lower aluminium electrolyzing carbon slag of texturing temperature, waste cathode carbon block, casting aluminium ash, enable regenerated fluoride salt, aluminum oxide is reused for Aluminium Electrolysis.
The present invention---the device of producing regenerated fluoride salt, aluminum oxide with waste of aluminium electrolysis is the improvement to ZL96115111.0, is realized by following two technical schemes:
Technical scheme one: this device comprises main stove, and main stove is made of body of heater, feeding machine and the fly-ash separator that the body of heater top is connected with smoke-uptake; The bottom of body of heater is a heater case, and the boundary of heater case and burner hearth has main stove air distribution plate; Burner hearth is divided into boiling section and furnace roof expansion section again; Feeding machine is installed in the furnace charge ingress of the boiling section of burner hearth, in the side of boiling section manual handling door and discharge gate is arranged; The residual heat complementary structure of main stove is to adopt to be provided with interchanger in the furnace roof expansion section, and the import of pneumatic line and interchanger is joined, and the outlet of its interchanger is connected to the heater case of furnace bottom by pipeline.Be characterized in setting up pneumatic bulk cargo device at the discharge port place of the feeding machine of main stove.
Technical scheme two: this device comprises main stove, secondary stove, main stove is made of body of heater, feeding machine and the fly-ash separator that the body of heater top is connected with smoke-uptake, the body of heater bottom is a heater case, heater case and burner hearth boundary have main stove air distribution plate, burner hearth is divided into boiling section and furnace roof expansion section again, and feeding machine is installed in the furnace charge ingress of the boiling section of burner hearth; The discharge gate of main stove communicates with the boiling section of secondary stove burner hearth, major and minor stove is connect constitute one; The chamber structure of secondary stove is with main stove, and the following of the air distribution plate of secondary stove is bellows; Low level blowing plug and high-order blowing plug that the main stove discharge gate of sealing is arranged in the boiling section of secondary stove, its low, high-order blowing plug are realized the switch of main stove discharge gate by the control of the blowing stopper rod in secondary stove burner hearth; The residual heat complementary structure of major and minor stove is that the furnace roof expansion section at main stove and secondary stove is equipped with interchanger, pressurized air in the pipeline is exported to the interchanger of main stove through the interchanger of secondary stove and is entered in the main stove heater case again, and the pressurized air in another group pipeline enters in the bellows of secondary stove through main stove interchanger output again.Be characterized in setting up pneumatic bulk cargo device at the discharge port place of the feeding machine of main stove.
Apparatus of the present invention adopt technique scheme, because of having increased the effect of pneumatic bulk cargo device, can make feeding machine screw in the main stoving oven heavy material is compressed air and dispels and can be uniformly distributed in the siege surface, combustion-supporting gas fully contacts with material after entering the bed of material like this, do not need external energy after catching fire, only can keep autogenous roasting by the combustiblecomponents of furnace charge itself, until with the nuisance pitch in the furnace charge and most carbonaceous after-flame, just can obtain regenerated fluoride salt, the alumina powder of appearance white.Therefore, the present invention has not only kept the ZL96115111.0 patent can the roasting aluminium electrolytic flue ash, dirty material, the adsorptive pitch aluminum oxide, enable regenerating oxidation aluminium, aluminum fluoride and Sodium Fluoride are used for the advantage of Aluminium Electrolysis, solved the anodic carbon residue of existing boiling baking device again to producing in the non-ferrous metal production, waste cathode carbon block, ignition time is long during roasting that electrolysis of aluminum waste residues such as casting aluminium ash exist, the waste electric energy, and the deficiency of meltable hearth accretion, reduced to present 1.5 hour by original 3 hours its ignition time, and ton product power consumption is also reduced to present 150KWh by original 400KWh.Overcome general in the past pyrogenic process roasting and only limit the deficiency of carrying out and needing to replenish a large amount of energy on the material surface, fundamentally eliminated electrolysis of aluminum waste residue meltable hearth accretion, the uppity phenomenon of temperature when roasting.Use apparatus of the present invention process aluminum electrolytic waste, not only simple to operate, non-secondary pollution in roasting, and the regenerated fluoride salt that obtains, alumina product quality are good, and the rate of recovery can be up to more than 70%, and its product can be directly used in the production of electrolysis of aluminum.
(4) description of drawings
Fig. 1 is the structural representation of technical scheme one of the present invention;
Fig. 2 is the structural representation of technical scheme two of the present invention;
Fig. 3 is the mounting means structural representation of pneumatic bulk cargo device among the present invention;
The automatic control system schematic diagram that Fig. 4 adopts for the present invention.
Among Fig. 1 to Fig. 3, form the crushing and screening system by hammer mill 1, sieve apparatus 2.Electrical equipment operation board 3 is used to control apparatus of the present invention work.Under meter 8 is a spinner-type flowmeter, is installed on the compressed-air actuated admission passage, is used to measure airshed.Main stove is 17, and secondary stove is 27.Interchanger 11 on the main stove 17 and the interchanger 9 on the secondary stove 27 all adopt arc tube heat-exchanger, make with stainless steel tube.Main stove air distribution plate 5, secondary stove air distribution plate 23 are the compound horizontal screen plate of stainless steel.4 is main stove heater case, and 26 is the electricradiator in the main stove heater case.24 is secondary stove bellows.6 is valve, and 7 is the manual handling door.19,20 low, the high-order blowing plugs that are respectively main stove discharge gate place.Feeding machine 10 is a screw feeder, and 29 is the build bin of feeding machine, and 28 is loading hopper.12 is the flue of main stove 17, and 15 is the flue of secondary stove 27.14 for being installed on the fly-ash separator at flue top.13 is the automatic vibrator of electro-magnet of fly-ash separator 14.18 is the smoke collection cover of induced-draft fan 16, and 25 is the fly-ash separator of induced-draft fan 16.21 is the removal device of discharge port, and 22 is hopper.30 is pneumatic scatterer.
Among Fig. 4, DL is main stove electricradiator 26.D1 is a feeding machine 10.D2 is an impactor.D3 is a sieve apparatus.DCT is an electro-magnet vibrator 13.ZK1-ZK6 is an automatic air-break switch.Wy is a temperature controller.RD1-RD4 is a fusible cut-out.1HK-4HK is a switchgroup.1C-3C is a contactor.4C-10C is a magnetic starter.RJ1-RJ3 is a thermo-relay.1J-7J is an intermediate relay.1ST-6ST is the time relay.1WK-2WK is a transfer lever.1AN-15AN is a button.
(5) embodiment
Fig. 1, shown in Figure 3, the present invention have to set up pneumatic bulk cargo device 30 on the basis of main stove of residual heat complementary structure and constitute in the ZL96115111.0 patent.Pneumatic bulk cargo device 30 is installed in the discharge port place of the feeding machine 10 of main stove 17.
Shown in Figure 2, the present invention sets up pneumatic bulk cargo device 30 on the basis of the ZL96115111.0 patent that has major and minor stove residual heat complementary structure.Pneumatic bulk cargo device 30 is installed in the discharge port place of the feeding machine 10 of main stove 17.
Pneumatic bulk cargo device 30 of the present invention is to be made of the pneumatic line of being with under meter; The air outlet of pneumatic line is located at the discharge port place of feeding machine 10, and is provided with nozzle at the air outlet place of pneumatic line.The height of the main stove 17 of apparatus of the present invention is increased to 5.5 meters, and its expansion section height reaches 2.5 meters.The effect that apparatus of the present invention increase pneumatic bulk cargo device and main stove height is to dispel by the pressurized air that pneumatic bulk cargo device enters adding the heavy waste of aluminium electrolysis material of becoming owner of in the stove, material can be evenly distributed on the siege surface, the boiling bed of material of being erected by air cushion can reach 200-800mm, the problem that so not only can contain heavy material meltable hearth accretion, difficult control of temperature in stove effectively, and increased the ability of material handling, improved production efficiency.
In order to solve the problem of handling block wastes such as heavy aluminium electrolyzing carbon slag, waste cathode carbon block with apparatus of the present invention better, feeding machine 10 front ends in apparatus of the present invention are set up the crushing and screening system, and its crushing and screening system is made up of impactor 1 and sieve apparatus 2.Impactor 1 is selected the 7KW hammer mill for use, and sieve apparatus 2 is selected 2KW plane slanted screen machine for use.Roasting in feeding machine is sent into stove again after heavy block waste material pulverized makes it regenerated fluoride salt, aluminum oxide is reused for Aluminium Electrolysis, and the rate of recovery can reach more than 70%.
Improve the heat transfer efficiency of air distribution plate and adapt to the ability of blowing the material that lifts big proportion for further, elect the percentage of open area of main stove air distribution plate 5 and secondary stove air distribution plate 23 as 0.8%, the aperture of its sieve aperture is 1.5mm, so just can solve the material overlong time of in stove, lighting a fire, the problem of the short easy burn-out of air distribution plate life cycle.
Apparatus of the present invention can adopt manual control to finish all processes of pulverizing, reinforced, temperature control, roasting and discharge, also can adopt among Fig. 4 automatic control system to pulverize, reinforced, temperature control, roasting realize automatic control with the discharge whole process.
Using apparatus of the present invention is to adopt solid waste such as boiling process process aluminum electrolytic anodic carbon residue, waste cathode carbon block, casting aluminium ash, makes it regenerated fluoride salt, aluminum oxide, is reused for Aluminium Electrolysis.This device still is fit to fluidized bed roasting aluminium electrolytic flue ash, dirty material, adsorptive pitch aluminum oxide etc.Therefore, the present invention brings huge economic benefit and social benefit can for surely aluminum smelting technology producer.
Claims (6)
1, a kind ofly produce the device of regenerated fluoride salt, aluminum oxide with waste of aluminium electrolysis, comprise main stove (17), main stove (17) is made of the fly-ash separator (14) that body of heater, feeding machine (10) and body of heater top are connected with smoke-uptake (12); The bottom of body of heater is heater case (4), and heater case (4) has main stove air distribution plate (5) with the boundary of burner hearth; Burner hearth is divided into boiling section and furnace roof expansion section again, and feeding machine is installed in the furnace charge ingress of the boiling section of burner hearth, in the side of boiling section manual handling door and discharge gate is arranged; The residual heat complementary structure of main stove (17) is to adopt to be provided with interchanger in the furnace roof expansion section, and the import of pneumatic line and interchanger (11) is joined, and the outlet of its interchanger (11) is connected to the heater case (4) of furnace bottom by pipeline; It is characterized in that setting up pneumatic bulk cargo device (30) at the discharge port place of the feeding machine (10) of main stove (17).
2, a kind of device of producing regenerated fluoride salt, aluminum oxide with waste of aluminium electrolysis, comprise main stove (17), secondary stove (27), main stove (17) is made of the fly-ash separator (14) that body of heater, feeding machine (10) and body of heater top are connected with smoke-uptake (12), the body of heater bottom is heater case (4), heater case (4) has main stove air distribution plate (5) with the burner hearth boundary, burner hearth is divided into boiling section and furnace roof expansion section again, and feeding machine (10) is installed in the furnace charge ingress of the boiling section of burner hearth; The discharge gate of main stove communicates with the boiling section of the burner hearth of secondary stove (27), major and minor stove is connect constitute one; The chamber structure of secondary stove is with main stove, and the following of the air distribution plate (23) of secondary stove (27) is bellows (24); Low level blowing plug (19) and high-order blowing plug (20) that the main stove discharge gate of sealing is arranged in the boiling section of secondary stove (27), the switch of main stove discharge gate is realized by the control of the blowing stopper rod in secondary stove burner hearth in its blowing plug (19), (20); The residual heat complementary structure of major and minor stove is that the furnace roof expansion section at main stove (17) and secondary stove (27) is equipped with interchanger, pressurized air in the pipeline is exported to the interchanger (11) of main stove (17) through the interchanger (9) of secondary stove (27) and is entered in the main stove heater case (4) again, and the pressurized air in another group pipeline enters in the bellows (24) of secondary stove (27) through interchanger (11) output of main stove (17) again; It is characterized in that setting up pneumatic bulk cargo device (30) at the discharge port place of the feeding machine (10) of main stove (17).
3, the device of producing regenerated fluoride salt, aluminum oxide with waste of aluminium electrolysis according to claim 1 and 2, it is characterized in that described pneumatic bulk cargo device (30) is made of the pneumatic line of band under meter, the air outlet of pneumatic line is located at the discharge port place of feeding machine (10), and is provided with nozzle at the air outlet place of pneumatic line.
4, the device of producing regenerated fluoride salt, aluminum oxide with waste of aluminium electrolysis according to claim 1 and 2, it is characterized in that feeding machine (10) front end at said apparatus sets up the crushing and screening system, its crushing and screening system is made up of impactor (1) and sieve apparatus (2).
5, according to claim 1 and 2ly produce the device of regenerated fluoride salt, aluminum oxide with waste of aluminium electrolysis, it is characterized in that the height of main stove (17) is increased to 5.5 meters, its expansion section height reaches 2.5 meters.
6, according to claim 1 and 2ly produce the device of regenerated fluoride salt, aluminum oxide, it is characterized in that the percentage of open area of main stove air distribution plate (5) and secondary stove air distribution plate (23) is 0.8% with waste of aluminium electrolysis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02132469A CN1396282A (en) | 2002-06-14 | 2002-06-14 | Equipment for preparing regenerated fluoride salt or alumina from waste of aluminium electrolysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02132469A CN1396282A (en) | 2002-06-14 | 2002-06-14 | Equipment for preparing regenerated fluoride salt or alumina from waste of aluminium electrolysis |
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| Publication Number | Publication Date |
|---|---|
| CN1396282A true CN1396282A (en) | 2003-02-12 |
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| CN02132469A Pending CN1396282A (en) | 2002-06-14 | 2002-06-14 | Equipment for preparing regenerated fluoride salt or alumina from waste of aluminium electrolysis |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100594181C (en) * | 2007-12-17 | 2010-03-17 | 中国铝业股份有限公司 | Method for preparing sheet alumina powder |
| CN1869257B (en) * | 2005-05-25 | 2010-05-12 | 株式会社R日青 | Pelleting machine and material treatment system for tank having the same |
| CN102639755A (en) * | 2009-12-02 | 2012-08-15 | 力拓艾尔坎国际有限公司 | Method for changing used anode, and holder and system for temporarily storing such a used anode |
| CN102953090A (en) * | 2011-08-29 | 2013-03-06 | 沈阳铝镁设计研究院有限公司 | Bottom air inlet type purification system |
-
2002
- 2002-06-14 CN CN02132469A patent/CN1396282A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1869257B (en) * | 2005-05-25 | 2010-05-12 | 株式会社R日青 | Pelleting machine and material treatment system for tank having the same |
| CN100594181C (en) * | 2007-12-17 | 2010-03-17 | 中国铝业股份有限公司 | Method for preparing sheet alumina powder |
| CN102639755A (en) * | 2009-12-02 | 2012-08-15 | 力拓艾尔坎国际有限公司 | Method for changing used anode, and holder and system for temporarily storing such a used anode |
| CN102639755B (en) * | 2009-12-02 | 2015-09-30 | 力拓艾尔坎国际有限公司 | Change the method for waste and old anode and the strut member of the waste and old anode of temporary reservoir and system |
| CN102953090A (en) * | 2011-08-29 | 2013-03-06 | 沈阳铝镁设计研究院有限公司 | Bottom air inlet type purification system |
| CN102953090B (en) * | 2011-08-29 | 2015-06-03 | 沈阳铝镁设计研究院有限公司 | Bottom air inlet type purification system |
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