CN1058242A - Rapid electric baking of self-baking anode electrolyser - Google Patents

Rapid electric baking of self-baking anode electrolyser Download PDF

Info

Publication number
CN1058242A
CN1058242A CN 91107256 CN91107256A CN1058242A CN 1058242 A CN1058242 A CN 1058242A CN 91107256 CN91107256 CN 91107256 CN 91107256 A CN91107256 A CN 91107256A CN 1058242 A CN1058242 A CN 1058242A
Authority
CN
China
Prior art keywords
anode
aluminium
bar
baking
roasting
Prior art date
Application number
CN 91107256
Other languages
Chinese (zh)
Inventor
易德纯
雷培礼
吴叔云
Original Assignee
重庆铝厂
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 重庆铝厂 filed Critical 重庆铝厂
Priority to CN 91107256 priority Critical patent/CN1058242A/en
Publication of CN1058242A publication Critical patent/CN1058242A/en

Links

Abstract

The invention belongs to sodium aluminum fluoride---the alumina molten salt electrolysis method is produced the anode baking process of aluminium.Be applicable to aluminium cell with self-baking anode, its unique distinction is that corresponding position of inserting with anode bar is welded with aluminium bar on aluminium sheet, and the aluminium bar upper end wears the charcoal cap.The present invention can make breakaway starting current moment reach circuital 70%, can rise to total current about 30 minutes, only needs roasting four days, with original various roasting methods relatively, avoided Toona sureni, disconnected rod, leaked phenomenon such as paste, saved human and material resources, electric energy greatly.Especially to having the electrolyzer of producing series, can rise to total current at short notice, be unlikely to influence the work of ordinary production groove, the raising of its production efficiency and economic benefit is very significant.

Description

The invention belongs to sodium aluminum fluoride-alumina molten salt electrolysis method and produce the anode baking process of aluminium, be applicable to cell with self baking anode.
Existing soberberg anode technology, particularly concerning the anode-baking of new series aluminium cell, because distribution of current is inhomogeneous, the bottom land temperature is also inhomogeneous, and the roasting process electric energy loss is big, and it is long to reach the required time of ordinary production temperature, needs six usually round the clock.For the aluminium cell that has ordinary production series,, have a strong impact on its production efficiency because it is long to reach the total current required time.
The objective of the invention is to make the direct current that imports from anode to distribute equably, reduce the electric energy loss of roasting process, reach total current fast, shorten roasting time, save electric energy, enhance productivity.
Usually soberberg anode is that direct current is imported by anode bar, through anode mix, dielectric substrate, derives from negative electrode behind the aluminium sheet.Because resistance was very big before the anode mix roasting became cone, electric current can not flow to negative electrode equably, and anode bar Toona sureni, disconnected rod can appear in electric current when too concentrating.Even leak phenomenon such as paste.The present invention's aluminium bar of burn-oning the position that corresponding sub-anode bar inserts on aluminium sheet plays guide functions, make electric current flow to the negative electrode of bottom land equably, make electric current and bottom land uniformity of temperature profile, between this aluminium bar and anode bar, place a charcoal cap, in case anode bar point fusing during ordinary production.The present invention especially is suitable for sub-lateral contact pin cell with self baking anode, for the electrolyzer of 60KA, and the aluminium bar diameter 5cm that welds, length is 18cm.
The Aluminum Electrolysis Production process mainly is to do ionogen with sodium aluminum fluoride-alumina molten salt, and carbon material is negative electrode and anode, obtains liquid aluminium during electrolysis on negative electrode, obtains CO on the anode 2With the CO mixed gas, the aluminum oxide in the ionogen consumes gradually.
Necessary baked anode before producing, the present invention is mainly used in continuous soberberg anode point and separates groove.After anode mix was added in the slotting or upward slotting anode of side, by the joule heating of self-resistance generation and the heat of electrolyte supply, roasting became carbon anode voluntarily.The anode rod iron hammers into and plays conduction and carrying anode weight in the anode bodies.The main purpose of roasting is to make anode sintering become the cone of certain altitude, makes bottom land seam close-burning and preheating electrolytic bath body simultaneously, and the bottom land temperature should reach the temperature of ordinary production as far as possible equably.
In order to save electric energy; the roasting of electrolyzer should be carried out with fast as far as possible speed; but when adopting the technology of coke grain or powdered carbon baked anode in the past; and adopt molten aluminum roasting and do not carry out before the improvement of the present invention; the roasting electric current at the beginning can not be too big; the time that rises to full stream is long, and it is heavy to work.
The medium cell of a 60kA, usually breakaway starting current is from 500A, bath voltage is 0.7~1A, promoted once every 2 hours, every liter 500A in 20 hours, in 22 to 40 hours, rise 1000A at every turn, do not reach circuital 30% round the clock to two, rose 1500A in 42~60 hours, each 2000A that promotes reached total current to 104 hours in 62~102 hours at every turn, the anode bottom begins sintering, after this keep total current to continue roasting to six round the clock not, Zhiyang polar cone body sinter molding can start operation.
Because between anode bar point and the cast aluminium plate all is the anode mix (containing 28~32% molten asphalt in the composition) of not easy conductive, distribution of current is very inhomogeneous, when electric current progressively rises, indivedual anode bars are easy to rubescent, even blow, and flow out the magma that is difficult for blocking, the electrical roasting of having to sometimes be forced to stop at disconnected burning place, again clear up raw material and anode mix in the groove, carry out the secondary electrical roasting again.
The present invention is applicable to the molten aluminum roasting anodic process, take on aluminium sheet corresponding to the burn-on means of aluminium bar of the position that anode bar inserts, can when roasting, produce guide functions, make the distribution of current on the anode bar even, and then make electric current evenly import negative electrode, make the bottom land temperature reach the temperature of ordinary production equably, between aluminium bar and anode, add a charcoal cap of casting mold, anode bar point fusing in the time of can avoiding ordinary production.Aluminium bar diameter 3~10cm, length is as the criterion with the distance of anode bar point to aluminium sheet.
Be description of drawings below:
Accompanying drawing: aluminium liquid electrical roasting synoptic diagram
Anode, 12-anode superstructure, 13-charcoal cap, 14-aluminium bar, 15-aluminium coaming plate, 16-cast aluminium plate, 17-cathode carbon pieces, 18-negative electrode square steel, 19-asbestos plate, 20-aluminium case behind 1-carriage, 2-aluminosilicate fiberboard, 3-diatomite insulating block, 4-refractory brick, the fire-resistant concrete of 5-, 6-charcoal paste, 7-pot shell, 8-side wall carbon block, 9-roasting tankage material, 10-anode bar, the 11-casting mold.
Embodiment: a 60kA lateral contact pin aluminium cell with self-baking anode, adopt bilayer that end aluminium case is arranged, the bottom surface is one deck, and the side is two-layer, and two big faces and two facets all adopt the aluminium coaming plate.Remove foreign material before the roasting earlier, blow off dust, injecting height is the aluminium liquid of 5cm, and the surface should be smooth, must remove surface scum, cooling forms the cast aluminium plate, weld 22 diameter 5cm then on the cast aluminium plate, the aluminium bar of long 18cm respectively adds a charcoal cap on the aluminium bar, anode bar and electrolyzer plane are 15 ° of angles inserts, and the aluminium bar welding position must make the tip of 22 anode bars of first row just be placed on the charcoal cap.The partly aluminium liquid that reinjects in the spaces that the back produces are shunk in the cooling of four jiaos of cast aluminium plates makes four jiaos of cast aluminium plates contact well with carbon cathode.Electrical roasting then, electric current rising gradient such as following table:
Time (branch) 05 10 15 20 25 30
Electric current (KA) 42 45 48 51 54 57 60
Voltage (V) 9 8.5 8.1 7.6 7.4 7.3 7.2
The breakaway starting current of promptly switching on is 42kA, and the rising one-level was 3kA in later per 5 minutes, rose to 60kA about 30 minutes.Keep total current, to about six hours, anode begins to heat up, the pitch effusion of progressively volatilizing.The formation of anode sintering cone is broadly divided into three phases; The roasting initial stage is to begin to generate cone around the anode bar, and with the carrying out and enlarge of roasting, cone extends to the electrolyzer middle body gradually around anode bar then, and the roasting later stage then is that the cone of middle body gradually grows up.Can start operation to four left and right conical body formation round the clock.
The present invention can make breakaway starting current reach circuital 70% at the very start, can in 30 minutes, rise to total current, roasting time shortened to four days by original six days, reaching the circuital time shortened to 30 minutes by original four days, and the roasting process is steady, anode bar is not rubescent, and constantly the paste phenomenon does not more take place to leak rod.The anode sintering cone is normal, and roasting process is simple to operate, has removed in the past anxiety from and the heavy work scene, reduced the huge loss of human and material resources, electric energy, every platform trough power consumption 1.81 ten thousand kilowatt-hours when roasting finishes, and be 30,000 kilowatt-hours, even up to 50,000 kilowatt-hours in the past.
Particularly, when one of them electrolyzer needs baked anode, can rise to total current at short notice, not influence the work of ordinary production groove, improve the production efficiency of electrolytic aluminum greatly for ordinary production series.
In sum, rapid electric baking of self-baking anode electrolyser method of the present invention is to improve the effective ways of Aluminum Electrolysis Production efficient, has improved production environment, has saved electric energy, has reduced the manpower consumption, and the economic benefit in institute generation is difficult to estimate.

Claims (3)

1, a kind of sodium aluminum fluoride-alumina molten salt electrolysis method is produced the anode baking process of aluminium, and direct current imports from anode bar, through deriving from negative electrode behind anode mix, dielectric substrate, the aluminium lamination, it is characterized in that: be welded with aluminium bar at aluminium lamination corresponding to the position that anode bar inserts.
2, technology according to claim 1 is characterized in that: place a charcoal cap between aluminium bar and anode bar.
3, technology according to claim 1 and 2 is characterized in that: when being used for medium-sized lateral contact pin cell with self baking anode, and 5 centimetres of aluminium bar diameters, 18 centimetres of length.
CN 91107256 1991-07-23 1991-07-23 Rapid electric baking of self-baking anode electrolyser CN1058242A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 91107256 CN1058242A (en) 1991-07-23 1991-07-23 Rapid electric baking of self-baking anode electrolyser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 91107256 CN1058242A (en) 1991-07-23 1991-07-23 Rapid electric baking of self-baking anode electrolyser

Publications (1)

Publication Number Publication Date
CN1058242A true CN1058242A (en) 1992-01-29

Family

ID=4908611

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 91107256 CN1058242A (en) 1991-07-23 1991-07-23 Rapid electric baking of self-baking anode electrolyser

Country Status (1)

Country Link
CN (1) CN1058242A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102995058A (en) * 2012-12-06 2013-03-27 云南云铝涌鑫铝业有限公司 Method for paving roasting medium in aluminum electrolysis cell and method for roasting lining
CN104611723A (en) * 2015-03-11 2015-05-13 东北大学设计研究院(有限公司) Method for reducing new anode current conducting time of electrolytic cell
WO2018120255A1 (en) * 2016-12-30 2018-07-05 山西精之铝科技有限公司 Inbuilt conductor continuous aluminium frame anode aluminium electrolytic bath

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102995058A (en) * 2012-12-06 2013-03-27 云南云铝涌鑫铝业有限公司 Method for paving roasting medium in aluminum electrolysis cell and method for roasting lining
CN102995058B (en) * 2012-12-06 2015-06-17 云南云铝涌鑫铝业有限公司 Method for paving roasting medium in aluminum electrolysis cell and method for roasting lining
CN104611723A (en) * 2015-03-11 2015-05-13 东北大学设计研究院(有限公司) Method for reducing new anode current conducting time of electrolytic cell
CN104611723B (en) * 2015-03-11 2017-01-11 东北大学设计研究院(有限公司) Method for reducing new anode current conducting time of electrolytic cell
WO2018120255A1 (en) * 2016-12-30 2018-07-05 山西精之铝科技有限公司 Inbuilt conductor continuous aluminium frame anode aluminium electrolytic bath
US11015254B2 (en) 2016-12-30 2021-05-25 Shanxi Jingzhi Aluminium Technology Co., Ltd. Aluminum electrolytic bath having continuous aluminum-frame anode with built-in conductors

Similar Documents

Publication Publication Date Title
CN103540961B (en) The electrolyzer of a kind of electrolysis light rare earth metal or alloy and method
CN101629304B (en) Coke particle baking startup method for pre-baked anode aluminum electrolytic cell and structure thereof
CN201809448U (en) Aluminum electrolysis cell provided with two rows of mutually-staggered lugs on same cathode block
CN101660175B (en) Method for roasting and starting aluminum electrolytic cell
CN101440503A (en) Novel aluminum cell structure
CN106894052B (en) A kind of conjuncted-multilevel aluminum electrolysis unit and its application method preparing rafifinal
CN1058242A (en) Rapid electric baking of self-baking anode electrolyser
CN201305637Y (en) Rare earth electrolysis cell
CN101348922A (en) Energy-saving type low voltage set aluminum cell
CN205616961U (en) Pure aluminium cathode low energy consumption aluminium cell
CN1233878C (en) Electrorefining trough mixture roasting starting method
CN101353805B (en) Aluminum cell flame-aluminum solution two-stage calcination method
CN105780053B (en) A kind of aluminum electrolysis method using aluminium as cathode
CN105780056B (en) Double-layer aluminum cathode aluminium electrolytic cell
CN201296786Y (en) Coke grain baking starting structure for pre-baked-anode cell aluminum-reduction cell
CN203923410U (en) Can freely adjust the device of rare earth electrolysis cell pole span
CN201354386Y (en) Aluminum electrolysis bath energy-saving cathode block structure
CN201354385Y (en) Aluminum electrolysis bath cathode block structure
CN110079829B (en) Coke particle packaging type roasting starting method
CN102808196A (en) Direct-current shunt preheating start method for inert electrode aluminum electrolysis cell
CN102230187B (en) Baking start-up method of drained-style aluminum electrolysis cell
CN109898098B (en) Pre-baked anode heat-insulation structure of aluminum electrolytic cell
CN202181357U (en) Electrolytic tank capable of greatly reducing horizontal current
CN105780055B (en) The aluminium cell of cathode is used as using aluminium
CN201729888U (en) Large-scale pre-baked aluminum electrolyte pot cathode liner structure

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C01 Deemed withdrawal of patent application (patent law 1993)
WD01 Invention patent application deemed withdrawn after publication