CN101857960A

CN101857960A - Method for configuring bus bar of aluminum electrolytic bath

Info

Publication number: CN101857960A
Application number: CN201010158476A
Authority: CN
Inventors: 刘忠琼; 颜非亚
Original assignee: Guiyang Aluminum Magnesium Design and Research Institute Co Ltd
Current assignee: Guiyang Aluminum Magnesium Design and Research Institute Co Ltd
Priority date: 2010-04-28
Filing date: 2010-04-28
Publication date: 2010-10-13

Abstract

The invention discloses a method for configuring a bus bar of an aluminum electrolytic bath. The current in the electrolytic bath flows out from a power-in bus bar through a negative soft bus bar (1) to a zigzag bottom bus bar (3), a bottom through bus bar (4) and a side bus bar (5) respectively though a power-in negative bus bar, then enters a side bus bar through the zigzag bottom bus bar (3) and finally enters 4 pillar bus bars (7) of a downstream bath through the bottom through bus bar (4) and the side bus bar (5) respectively; and the current also flows out from a power-out bus bar through the negative soft bus bar (1) to the 4 pillar bus bars (7) of the downstream bath through a power-out negative bus bar (6). In the method, in an overall consideration of technology and economy and based on the configuration form of negative and positive pole numbers of the whole bath and the power-in way, a scheme for the magnetic field compensation of large aluminum electrolytic baths is more rationally designed to achieve a good magnetic field compensation effect and save the using amount of the bus bar around the baths so as to overcome the adverse factors in the conventional electrolytic baths.

Description

A kind of method for configuring bus bar of aluminum electrolytic bath

Technical field

The present invention relates to a kind of technical field of aluminum cell current feedway, be specifically related to a kind of large-scale aluminum electrolytic cell groove bus current collocation method on every side.

Background technology

Development along with China's aluminium industrial production technology, the potline current intensity of modern large-scale aluminum electrolytic cell increases just day by day, and the electromagnetic force that the melt Interaction Law of Electric Current produces in magnetic field that the production electric current of electrolyzer produces and the electrolyzer is quickened the interior melt circulation of groove, cause liquid aluminum to produce protuberance, deflection and fluctuation, in addition may influence electrolyzer can not ordinary production.Therefore in order to realize the stable of electrolyzer magnetic fluid, around groove, require on the busbar influence electrolyzer production stable important factor---groove internal magnetic field distribution character (require magnetic field value little, gradient is little) becomes even more important.As adopt original groove busbar on every side, and can not finely satisfy the requirement of electrolyzer Magnetic Field Design, can cause the electrolyzer local magnetic field excessive, groove stability is bad, and this not only brings very big harm to production operation, and can not produce good economic benefit.

Summary of the invention

Technical problem to be solved by this invention provides a kind of electrolyzer bus collocation method, take all factors into consideration from technology, economy, count collocation form and advance electric mode at full groove cathode and anode group, more reasonably design large-scale aluminum electrolytic cell field compensation scheme, make it can obtain good field compensation effect, can save groove bus consumption on every side again, thereby overcome the unfavorable factor that exists in original electrolyzer.

In order to address the above problem, the present invention adopts following technical scheme: when electrolyzer is produced, galvanic current enters the 4 root post buses of this groove respectively from the upstream electrolyzer, electric current enters on the anode large bus bar of groove superstructure by riser bus bar, be redistributed to and respectively organize anode, flow through then melt dielectric substrate in the groove, the aluminium liquid layer, and cathode carbon pieces, behind the cathode steel bar, import electricity input side negative busbar or electricity output side negative busbar by cathode soft bus with the cathode steel bar welding, the electricity input side negative busbar flows into bottom land bus in a zigzag respectively, bottom land is walked bus, the groove side bus, the bottom land bus imports the groove side bus in a zigzag, walk bus by bottom land again, the groove side bus imports 4 root post buses of downstream slot respectively, and the negative busbar of electricity output side also imports 4 root post buses of downstream slot respectively.

In above-described formation, the current ratio distribution means of 4 root post buses of electricity input side for equating, and electricity input side negative busbar and electricity output side negative busbar adopt the balanced configuration of multilayer bus, the electricity output side negative busbar also adopts the mode of bus horizontal folding or vertical folding to increase its current path to the downstream slot riser bus bar, to reach the purpose of current balance type.

The present invention compares with original cell technologies, adopting the weak compensation scheme of negative busbar bottom land is the negative busbar bottom land compensation scheme that detours, it detours most of electric current from the electrolyzer end, simultaneously by changing bus height and zigzag bottom land bus, to realize reducing groove internal magnetic field and transverse horizontal magnetic field, make full slot field present multimodal and the lower uniform distribution characteristics of peak valley, in addition in this negative busbar collocation method, bus bar when all negative busbars are ordinary production, short-circuit busbar when being short circuit again, and during with ordinary production electric current move towards identical.This not only when single electrolyzer stops groove to the influence on system operation minimum of contiguous electrolyzer, and saved the bus consumption.

Characteristics of the present invention are: by the compensation of detouring of negative busbar bottom land, the riser bus bar geometric ratio is advanced, advance, the electricity output side negative busbar adopts the balanced configuration of multilayer bus, the electricity output side negative busbar also adopt the mode of bus horizontal folding or vertical folding increase its to schemes such as downstream slot riser bus bar distance to reach best, magnetic, the fluid characteristics relation of matching, making large pre-baked cell obtain rational groove internal magnetic field distributes and stable melt flow field, guarantee the stable and higher current efficiency of electrolyzer production process, can well finish design and production demand, fully satisfy the electrolyzer durability requirements.

Description of drawings

Fig. 1 is a principle schematic of the present invention;

Fig. 2 is the view combination of electricity input side and electricity output side.

Embodiment

Embodiment 1: when electrolyzer is produced, galvanic current enters the electricity input side 4 root post buses 7 of this groove from the upstream electrolyzer, electric current enters on the anode large bus bar of groove superstructure through waiting electric current 4 root post buses 7, be redistributed to 12 groups of anodes, flow through then melt dielectric substrate in the groove, the aluminium liquid layer, and 12 groups of cathode carbon pieces, behind 12 groups of cathode steel bars, import electricity input side negative busbar 2 at electricity input side by 12 groups of cathode soft bus 1 with the cathode steel bar welding, electricity input side negative busbar 2 flows into 2 bottom land buses 3 in a zigzag more respectively, 2 bottom lands are walked bus 4,2 groove sidepiece buses 5,2 zigzag bottom land buses 3 import 2 groove side bus respectively, walk bus 4 by bottom land again, groove side bus 5 imports 4 root post buses 7 of downstream slot respectively; Import electricity output side negative busbar (6) at electricity output side by 12 groups of cathode soft bus with the cathode steel bar welding, the negative busbar of electricity output side also imports 4 root post buses 7 of downstream slot respectively by bus horizontal folding or vertical folding.More than each section negative busbar and downstream slot riser bus bar respectively by being weldingly connected.

Claims

1. electrolyzer bus collocation method, comprise cathode soft bus (1), electricity input side negative busbar (2), zigzag bottom land bus (3), bottom land is walked bus (4), groove side bus (5), electricity output side negative busbar (6) and riser bus bar (7), it is characterized in that: the electric current in the electrolyzer, flow out by cathode soft bus (1) at the electricity input side bus, through flowing into bottom land bus (3) in a zigzag behind the electricity input side negative busbar (2) respectively, bottom land is walked bus (4) and groove side bus (5), in a zigzag bottom land bus (3) imports groove sidepiece bus, walks the 4 root post buses (7) that bus (4) and groove side bus (5) import downstream slot respectively by bottom land again; Also flow out at the electricity output side bus, through importing 4 root post buses (7) of downstream slot behind the negative busbar (6) of electricity output side respectively by cathode soft bus (1).