CN105401171A - Continuous aluminum oxide blanking method and device - Google Patents
Continuous aluminum oxide blanking method and device Download PDFInfo
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- CN105401171A CN105401171A CN201511011709.2A CN201511011709A CN105401171A CN 105401171 A CN105401171 A CN 105401171A CN 201511011709 A CN201511011709 A CN 201511011709A CN 105401171 A CN105401171 A CN 105401171A
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- aluminum oxide
- chute
- baiting chute
- blanking
- emission
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/14—Devices for feeding or crust breaking
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- Chemical Kinetics & Catalysis (AREA)
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- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
The invention discloses a continuous aluminum oxide blanking method and device. The continuous aluminum oxide blanking device is of an upper-lower two-section type chute structure, and a lower chute is made of a dielectric-corrosion-resistant material, so that the lower chute is directly buried into a melt on an electrolyte layer after passing through an anode covering material layer; and then, the flow of aluminum oxide entering from an upper chute to the lower chute is controlled by a flow control mechanism on the upper chute to ensure that a small quantity of aluminum oxide continuously enters an electrolytic tank within unit time so as to be continuously blanked. According to the continuous aluminum oxide blanking method and device, the flow of aluminum oxide is regulated and controlled by a flow control valve, so that the condition that a great deal of aluminum oxide is added into the electrolytic tank once is avoided. The two-section type blanking chutes are adopted, and the lower blanking chute is made of the corrosion-resistant material, so that the blanking chute can be buried into the melt, aluminum oxide can directly enter the electrolytic tank, but cannot fly off, the traditional crust breaking and blanking mechanism is omitted, and furthermore the investment is reduced.
Description
Technical field
The present invention relates to the feed postition of the supporting alumina raw material of Aluminium Electrolysis and add equipment, being specifically related to method and the device thereof of the continuous blanking of a kind of aluminum oxide.
Background technology
Independently carry out the research and development of 80kA, 100kA and 135kA pre-calcining electrolytic cell from 20 century 70 China, introduce 160kA pre-baked anode cell with center feeding technology to the eighties, from digesting and assimilating foreign technology, open the prelude of contemporary Chinese aluminum electrolyzation technology development.Along with the quick growth of domestic national economy, and the strategic development policy of China Non-Ferrous Metals Industry's proposition " first developing aluminum i ndustry ", China's Aluminum industry also develops rapidly.Electrolytic aluminum production capacity rises to 3,250 ten thousand tons in 2015 from 2006 1,186 ten thousand tons, and production capacity has been turned over many.But along with increasing rapidly of electrolytic aluminum production capacity, its rate of expansion greatly exceed the supporting capacity of external conditions, and not only supply falls short of demand for alumina market, also bring simultaneously electric power, coal supply very nervous.For suppressing production capacity surplus, keep the Aluminium Industry of Sustainable Healthy Development, country starts from taking macro adjustments and controls measure to electrolytic aluminum development in 2008, and strict implement industry policy and entry criteria, eliminate the backward production facilities comprehensively.
Along with anxiety and the international financial crisis also non-complete digestion of coal resources; especially step into over 2015; market aluminium ingot price is hovered at 10000 ~ 11000 yuan/ton for a long time, and aluminium ingot market value depression and constantly raising of electricity price constrain further developing of existing aluminium electrolysis enterprise.Therefore, under this market environment, to reduce electrolyzer running voltage thus to reduce the technological development direction that the target running power consumption becomes domestic aluminium enterprise now.
As everyone knows, the running voltage of electrolyzer is made up of interpolar pressure drop, anode drop, cathode drop, busbar voltage drop and counter-electromotive force, and wherein, interpolar pressure drop occupies the ratio of 35-40%, the about 330-370mv of every 1cm interpolar pressure drop.Therefore, most aluminium enterprise have employed reduce pole span thus the method reducing interpolar pressure drop to obtain the reduction of voltage.
But, the reduction of pole span is not useful and harmless, after the raw alumina that current electrolysis aluminium is produced all opens shell face by crust breaker, join in bath of cell through point feeding device, point feeding device is arranged in the top of electrolyzer, its volume, generally at 1.2-2.2L, this means to be entered into by point feeding device that namely the aluminum oxide of electrolyzer is disposable has 1.2-2.2Kg at every turn.See accompanying drawing 1.And aluminum oxide is spread by interpolar, along with the reduction of pole span, the diffusion space of aluminum oxide reduces, after disposable relatively large input aluminum oxide, short period of time can not be diffused in electrolyte melt effectively reacts, and not only reduces current efficiency, and can sink at the bottom of electrolytic bath, form precipitation, reduce the efficiency of electrolysis production.Long-term precipitation will increase cathode resistor, cause power consumption to increase.Therefore, under low pole span, how in groove, to add aluminum oxide, become the problem that puzzlement electrolytic aluminum efficient low-consume is at present produced.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of aluminum oxide to join method in bath of cell and device thereof, thus can improve the diffusibility of aluminum oxide under low pole span, reduce the generation of precipitation, reduce cathode resistor.Thus raising current efficiency, energy efficient.
The present invention is by the following technical solutions:
The present invention is the method for the continuous blanking of a kind of aluminum oxide, it adopts two sections formula elephant trunk structure, the elephant trunk of bottom adopts the material of resistance to dielectric etch to make, the elephant trunk of bottom is made directly to be embedded in the melt of dielectric substrate through anode-covered material layer like this, then the flow control mechanism on the elephant trunk on top is utilized to control to enter into from the elephant trunk on top the aluminum oxide flow of the elephant trunk of bottom, make aluminum oxide without stop and enter into electrolyzer to very low amount within the unit time, form continuous blanking.
The present invention adopts the device of the continuous blanking of a kind of like this aluminum oxide, it comprises groove feeding box, two sections of mutually through from top to bottom emission of baiting chute are connected with in the below of groove feeding box, i.e. top emission of baiting chute and bottom emission of baiting chute, top emission of baiting chute is connected by flange with bottom emission of baiting chute, and bottom emission of baiting chute is embedded in the melt of dielectric substrate through anode-covered material layer; Top emission of baiting chute is provided with flowrate control valve.
Wherein, bottom emission of baiting chute is fixed on the below of groove superstructure base plate by fixed support.Top emission of baiting chute adopts steel to make, and bottom emission of baiting chute adopts carbonitride of silicium material to make.
The present invention has following technique effect:
The present invention adopts flowrate control valve to regulate and control the flow of aluminum oxide, avoids disposable a large amount of aluminum oxide and joins in electrolyzer.Adopt two-part emission of baiting chute, the emission of baiting chute of bottom adopts erosion-resisting material to make, thus enables this emission of baiting chute imbed melt, aluminum oxide not only can be made not disperse and directly enter electrolyzer, and eliminate traditional crust-breaking & baiting mechanism, save investment.
Accompanying drawing explanation
Fig. 1 is the device schematic diagram that conventional aluminium oxide adds electrolyzer;
Fig. 2 is the device schematic diagram that aluminum oxide of the present invention adds electrolyzer.
Accompanying drawing 2 description of symbols: 1-groove feeding box, 2-flowrate control valve, 3-top emission of baiting chute, 4-bottom emission of baiting chute, 5-flange, 6-fixed support, 7-anode-covered material layer, 8-dielectric substrate, 9-aluminium liquid layer, 10-groove superstructure base plate, 11-crust breaking cylinder, 12-hits tup, 13-emission of baiting chute, 14-constant-volume blanking device.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
As shown in Figure 1, traditional aluminum oxide adds the device of electrolyzer, aluminum oxide is stored in groove feeding box 1, first be filled with in constant-volume blanking device 14 before reinforced, after calculating sends reinforced instruction, crust breaking cylinder 11 action, drive and hit tup 12 and open anode capping layer, aluminum oxide enters into dielectric substrate 8 melt by one section of oblique emission of baiting chute 13 by the shell face hole of opening and carries out electrolysis.Which, because aluminum oxide is first by constant-volume blanking device, therefore belongs to semi-continuous charging.And this emission of baiting chute is positioned at the top of anode-covered material layer 7, the aluminum oxide slipped out from emission of baiting chute 13 can disperse and enter electrolyzer.
As shown in Figure 2, the device that device of the present invention and traditional aluminum oxide add electrolyzer is very different, the present invention connects two sections of emission of baiting chute mutually through from top to bottom in the below of groove feeding box 1, i.e. top emission of baiting chute 3 and bottom emission of baiting chute 4, top emission of baiting chute 3 is connected by flange 5 with bottom emission of baiting chute 4, and bottom emission of baiting chute 4 is embedded in the melt of dielectric substrate 8 through anode-covered material layer 7; Top emission of baiting chute 3 is provided with flowrate control valve 2.Wherein, bottom emission of baiting chute 4 is fixed on the below of groove superstructure base plate 10 by fixed support 6.Anode capping layer 7, dielectric substrate 8 and aluminium liquid layer 9 from top to bottom successively in electrolyzer.
Preferably, top emission of baiting chute 3 adopts steel to make, and bottom emission of baiting chute 4 adopts carbonitride of silicium material to make.
Embodiment 1:
The present invention implements like this, after alumina transferring to groove feeding box 1, top emission of baiting chute 3 is entered into by flowrate control valve 2, the emission of baiting chute 3 on top is connected by flange 5 with bottom emission of baiting chute 4, bottom emission of baiting chute 4 adopts the material of resistance to dielectric etch to make, and the below of groove superstructure base plate 10 is fixed on by fixed support 6, be embedded in the melt of dielectric substrate 8 through anode-covered material layer 7, aluminum oxide is according to the technique needs of electrolyzer, cell control system adjustment is accessed by flowrate control valve 2, without stop and enter into electrolyzer to very low amount within the unit time, form continuous blanking.
Embodiment 2:
As shown in Figure 2, alumina blanking point is arranged and is stitched position in a cell, after alumina transferring to groove feeding box 1, arranges an aciculiform flowrate control valve 2 bottom hopper, by the amount of feeding of adjustment aciculiform flowrate control valve 2 controlled oxidization aluminium.Aluminum oxide enters into the top emission of baiting chute 3 of steel by aciculiform flowrate control valve 2, top emission of baiting chute 3 is connected by flange 5 with bottom emission of baiting chute 4, bottom emission of baiting chute 4 adopts carbonitride of silicium material to make, be fixed on below groove superstructure base plate 10 by the fixed support 6 arranging three-legged structure, and be embedded in the melt of dielectric substrate 8 through anode-covered material layer 7.
Embodiment 3:
Certain company adopts 500KA ultra-large type prebaked-anode type cell, configures 2 electrolytic series, and each series installs 366 electrolyzers, and amounting to annual capacity is 1,000,000 tons.Adopt the continuous blanking equipment of aluminum oxide of the present invention, compared with traditional blanking distributing style, every platform saving crust breaker and each 6 of constant-volume blanking device, increase corrosion resistant bottom emission of baiting chute 3 and flowrate control valve 2,2 electrolytic series reduce investment outlay 1,200 ten thousand yuan altogether.
Owing to have employed the continuous blanking of aluminum oxide, in its production, electrolysis production efficiency and hearth and bottom obtain guarantee, compared with the operational mode of conventional low voltage, 1% is improved according to current efficiency, loss of voltage 50mv counts, aluminium valency 11000 yuan/ton, electricity price 0.4 yuan/degree, can be enterprise every year and increase the output value 11,000 ten thousand yuan, and save production cost 6,400 ten thousand yuan.
Therefore, by enforcement of the present invention, both reduce the cost of investment of electrolytic aluminium factory, solve again the problem that current efficiency reduces, power consumption increases because precipitation of alumina causes.
Certainly, more than just embody rule example of the present invention, the technical scheme that the present invention also has other embodiment, all employings to be equal to replacement or equivalent transformation to be formed, all drops within protection domain of the presently claimed invention.
Claims (4)
1. the method for the continuous blanking of aluminum oxide, it is characterized in that: adopt two sections formula elephant trunk structure, the elephant trunk of bottom adopts the material of resistance to dielectric etch to make, the elephant trunk of bottom is made directly to be embedded in the melt of dielectric substrate through anode-covered material layer like this, then the flow control mechanism on the elephant trunk on top is utilized to control to enter into from the elephant trunk on top the aluminum oxide flow of the elephant trunk of bottom, make aluminum oxide without stop and enter into electrolyzer to very low amount within the unit time, form continuous blanking.
2. the device of the continuous blanking of aluminum oxide, comprise groove feeding box (1), it is characterized in that: be connected with two sections of mutually through from top to bottom emission of baiting chute in the below of described groove feeding box (1), i.e. top emission of baiting chute (3) and bottom emission of baiting chute (4), top emission of baiting chute (3) is connected by flange (5) with bottom emission of baiting chute (4), and bottom emission of baiting chute (4) is embedded in the melt of dielectric substrate (8) through anode-covered material layer (7); Top emission of baiting chute (3) is provided with flowrate control valve (2).
3. the device of the continuous blanking of aluminum oxide according to claim 2, is characterized in that: described bottom emission of baiting chute (4) is fixed on the below of groove superstructure base plate (10) by fixed support (6).
4. the device of the continuous blanking of aluminum oxide according to claim 2, is characterized in that: top emission of baiting chute (3) adopts steel to make, and bottom emission of baiting chute (4) adopts carbonitride of silicium material to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511011709.2A CN105401171A (en) | 2015-12-30 | 2015-12-30 | Continuous aluminum oxide blanking method and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511011709.2A CN105401171A (en) | 2015-12-30 | 2015-12-30 | Continuous aluminum oxide blanking method and device |
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| CN105401171A true CN105401171A (en) | 2016-03-16 |
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| CN201511011709.2A Pending CN105401171A (en) | 2015-12-30 | 2015-12-30 | Continuous aluminum oxide blanking method and device |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200985355Y (en) * | 2006-12-22 | 2007-12-05 | 东北大学设计研究院（有限公司） | Novel aluminium electrolytic tank crust breaking device |
| CN101195921A (en) * | 2006-12-08 | 2008-06-11 | 贵阳铝镁设计研究院 | Automatic charging device of electrolyte powder |
| CN201280600Y (en) * | 2008-10-20 | 2009-07-29 | 青铜峡铝业集团有限公司 | Baiting flange locking piece of electrolysis sliding chute |
| CN101724865A (en) * | 2008-10-13 | 2010-06-09 | 高德金 | Continuous feeding device for alumina |
| CN201834980U (en) * | 2010-11-05 | 2011-05-18 | 贵阳铝镁设计研究院 | Continuous feeding device for aluminum electrolytic bath |
| CN103132105A (en) * | 2011-11-24 | 2013-06-05 | 贵阳铝镁设计研究院有限公司 | Electrolyte powder preparation, storage and conveying system device |
| CN103774182A (en) * | 2014-02-26 | 2014-05-07 | 湖南省科技发展中心 | Method for fabricating high-temperature preheating aluminum oxide progressive-blanking system by using foamed aluminum material |
| CN205258632U (en) * | 2015-12-30 | 2016-05-25 | 贵阳铝镁设计研究院有限公司 | Device of continuous unloading of aluminium oxide |
-
2015
- 2015-12-30 CN CN201511011709.2A patent/CN105401171A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101195921A (en) * | 2006-12-08 | 2008-06-11 | 贵阳铝镁设计研究院 | Automatic charging device of electrolyte powder |
| CN200985355Y (en) * | 2006-12-22 | 2007-12-05 | 东北大学设计研究院（有限公司） | Novel aluminium electrolytic tank crust breaking device |
| CN101724865A (en) * | 2008-10-13 | 2010-06-09 | 高德金 | Continuous feeding device for alumina |
| CN201280600Y (en) * | 2008-10-20 | 2009-07-29 | 青铜峡铝业集团有限公司 | Baiting flange locking piece of electrolysis sliding chute |
| CN201834980U (en) * | 2010-11-05 | 2011-05-18 | 贵阳铝镁设计研究院 | Continuous feeding device for aluminum electrolytic bath |
| CN103132105A (en) * | 2011-11-24 | 2013-06-05 | 贵阳铝镁设计研究院有限公司 | Electrolyte powder preparation, storage and conveying system device |
| CN103774182A (en) * | 2014-02-26 | 2014-05-07 | 湖南省科技发展中心 | Method for fabricating high-temperature preheating aluminum oxide progressive-blanking system by using foamed aluminum material |
| CN205258632U (en) * | 2015-12-30 | 2016-05-25 | 贵阳铝镁设计研究院有限公司 | Device of continuous unloading of aluminium oxide |
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Application publication date: 20160316 |
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