CN106541246A - The method that aluminum cell bus-bar sweat soldering is repaired under electromagnetic field environment - Google Patents

Abstract

The present invention discloses a kind of method that aluminum cell bus-bar sweat soldering is repaired under electromagnetic field environment, comprises the steps：Bus broken parts are carried out cutting, are polishing to see metallic luster；The repairing bus bar sizes determined by measurement carry out bus blanking；Weld mold base plate and side plate are designed according to bus specification；Blanking bus is hung to into installation position, weld bond gap is adjusted, good bus structure, erecting and welding mold bottom die and side plate are clamped, and periphery gap plugging is tight；After the crucible of bottom belt tapping hole is preheated, tapping hole is blocked, add Thermofusion welding agent, inserted safety match, cover lid；After weld bond preheating, crucible is placed on above weld bond, safety match is lighted, after cast molding to be welded, the demoulding, cleaning polishing bus weld bond.The inventive method welding quality is high, simple to operate, meets normal production conditions, can effectively reduce labor intensity, artificial and material consumption less, it is to avoid stop the impact brought to serial electrolysis bath of rationing the power supply.

Description

The method that aluminum cell bus-bar sweat soldering is repaired under electromagnetic field environment

Technical field

The present invention relates to a kind of method that aluminum cell bus-bar sweat soldering is repaired under electromagnetic field environment.

Background technology

With the maximization and grooved maximization of Aluminum Electrolysis Production scale, electrolytic bath amount increases therewith, field wires Arrangement becomes increasingly complex, and powerful electromagnetic field is flooded with whole potroom.In aluminium electrolysis shop, bus Jing is often because short The accidents such as crossing electric discharge, insulation board puncture, bakie, cause bus loose contact, bus surface large area arc crater scaling loss to spill High-temperature molten salt directly washes away bus, and can fuse when serious bus, directly affects trough conduction and normal electrolysis production.For bus These damages for occurring, it is necessary to repaired at scene.So power failure carries out bus REPAIR WELDING and had not only caused very big loss but also to life Product brings adverse effect.

According to the situation for appearing above, the general welding manner for adopting has：（1）Welded using electric welding mode, welded Connection resistance is significantly increased afterwards, is had a strong impact on welding quality, and is caused the waste of human and material resources.（2）Carried out using arc welding method Bus is repaired.Due to the impact of high current high-intensity magnetic field, during welding, equipment is difficult to normal operation, the electric current of welding equipment output and Voltage instability, liquid welding pool splashes, it is impossible to stack shaping.（3）Electric resistance welding needs special fixture, and is subject to bus Position and the restriction in space.CURRENT DISTRIBUTION is uneven simultaneously, and appearance of weld and welding quality are difficult to be guaranteed.（4）Gas welding and Gas pressure welding.Though both welding manners are unaffected by the magnetic field the welding that can be used for bus, as they are limited by pressing technology, Welding efficiency is relatively low.（5）Agitating friction weldering overcomes the shortcomings of such as pore of conventional melting welding, crackle, deformation, and strength of joint is big It is big to improve, the welding of thin plate aluminum alloy is commonly applied to, but still can not well be used for the welding that aluminium bar bus are accumulated in heavy in section.

In order to avoid high-intensity magnetic field affects, one of existing restorative procedure is repaiied to carrying out welding after the power failure of whole potroom It is multiple：Repair welding method repairs bus, and the first step carries out cleaning work.Pincers worker is using professed machine works such as angle grinder, straight grinder, brushes Tool cleans out bus breach surface, exposes cast aluminium true qualities.Secondly by welder with welding machine together, in layer built-up welding rise it is scarce Mouthful, and former bus plane is higher by, then aluminium welding wire or aluminium welding wire are melted with argon arc welding machine, the part that built-up welding is got up is with original bus Weldering is combined together.Its surface equating is made up to bus process specifications by pincers worker instrument.The defect of the method is whole Repair process needs repeatedly to have a power failure in short-term or the long period continuously has a power failure, and not only causes the reduction of electrolytic aluminium yield, energy consumption significantly Increase, can also increase noxious gas emission, cause environmental pollution.If continuously had a power failure when long, the aluminium liquid in electrolysis bath will solidify, The production of potroom aluminium liquid is had a strong impact on, heavy economic lossess are caused.

In order to realize the good welds of bus in magnetic field, magnetic field can be received by force or using with diamagnetic ability in theory The welding method of impact.Magnetic disturbance resistant electric arc welding apparatus and anti-magnetosphere are adopted such as.Anti- magnetosphere utilizes permeability magnetic material（Iron and steel, silicon Piece etc.）It is obtained.The device includes arc welding gun and its nozzle, be provided with nozzle shielding space magnetic field laterally, longitudinal component Magnetic head, magnetic head is connected with excitation power supply；Magnetic head is made up of annular core and magnetizing coil.With reference to three-dimensional combination shielding, electromagnetism The measures such as shielding protection, safety operation protection, can solve existing arc-welding apparatus and arc blow is produced in the case where there is magnetic environment now As the problems such as, and the technology is applied to into damage in 300kA electrolysis baths original production operation and the trough rim column repaired is female Line carries out powered reparation, obtains certain effect.The technology is of limited application, and is suitable only for the simple occasion in magnetic field, mainly During reason is aluminium cell actual moving process, aluminum cell bus-bar surrounding magnetic field situation is sufficiently complex, any one in groove bus The magnetic field of point is all three-dimensional stereoscopic rotating magnetic field, and closely bound up with the change of time；At present, magnetic in large pre-baked cell Field intensity density is big, magnetic direction complex distribution and dispersion, it is difficult with the Technologies such as routine " cover, prevent, leading, dredging, disturbing " Eliminating magnetic field affects, and especially the magnetic-field component perpendicular to bead direction is more difficult to shielding, furthermore demagnetization cost is very high, so cannot Popularization and application on a large scale are carried out in actual production.

The content of the invention

The purpose of the present invention overcomes the problem existed during existing aluminum cell bus-bar REPAIR WELDING, there is provided a kind of electromagnetic field The method that aluminum cell bus-bar sweat soldering is repaired under environment.

In order to solve above-mentioned technical problem, the invention provides following technical scheme：

The method that aluminum cell bus-bar sweat soldering is repaired under electromagnetic field environment, comprises the steps：

The first step：Bus broken parts are carried out cutting, polished, it is desirable to which section more than 90% is shown in metallic luster；

Second step, measures the bus bar sizes that need to be repaired, and the repairing bus bar sizes determined by measurement carry out bus blanking；

3rd step, designs weld mold base plate and side plate according to bus specification；

4th step, is hung to installation position with the blanking bus that second step is made by Insulating Hanging Belt, adjusts weld bond gap, a good bus Side plate is clamped with bus, periphery gap asbestos cord, stone by support, erecting and welding mold bottom die and side plate with fixture or jackscrew Sand slurry closure is tight；

5th step, after the crucible of bottom belt tapping hole is preheated, blocks the tapping hole of bottom with aluminium backing, adds Thermofusion welding agent, Insertion safety match, covers lid；

6th step, weld bond preheating, after temperature reaches cast temperature, the crucible of the 5th step is placed on above weld bond, and crucible is poured Blowhole alignment weld bond center；

7th step, lights safety match, and after cast molding to be welded, the demoulding, cleaning polishing bus weld bond make weld bond keep whole It is clean.

The inventive method may be implemented in the sweat soldering reparation under electromagnetic field environment to aluminum cell bus-bar, welding quality It is high, simple to operate, meet normal production conditions, can effectively reduce labor intensity, artificial and material consumption less, it is to avoid stop Ration the power supply the impact brought by serial electrolysis bath.

Description of the drawings

Accompanying drawing is used for providing a further understanding of the present invention, and constitutes a part for description, the reality with the present invention Applying example is used for explaining the present invention together, is not construed as limiting the invention.In the accompanying drawings：

Fig. 1 is present invention welding schematic diagram.

Specific embodiment

The preferred embodiments of the present invention are illustrated below in conjunction with accompanying drawing, it will be appreciated that preferred reality described herein Apply example and be merely to illustrate and explain the present invention, be not intended to limit the present invention.

Embodiment 1

The first step：Welding preparation.The bus to be repaired washed out to bakie carries out in-site measurement and reconnoitres；Broken parts are cut Cut, polish, otch should be as far as possible smooth.Polishing, as far as possible using instruments such as pneumatic shovel, electric mill, steel-wire sanding wheel, electric angle grinders, it is desirable to Section more than 90% is shown in metallic luster.

Second step, measurement need to repair bus bar sizes.The repairing bus bar sizes determined by measurement carry out bus blanking.

3rd step, utilizes refractory material according to bus specification（Graphite or refractory brick etc.）Make weld mold base plate and side Plate, determines weld bond welding times according to the size of weld bond, and makes the fixture or jackscrew of dimension, bus structure, and transport To scene.

4th step, as shown in figure 1, being hung to installation position with the blanking bus that second step is made by Insulating Hanging Belt, adjusts weldering Die bottom plate and side plate that the 3rd step is made are installed in mouthful gap, a good bus structure, with fixture or jackscrew by die side plate with Bus steps up, does not stay gap, and bus is tight with side sheet room asbestos cord, quartz mortar closure, prevents welding pool from leaking.

5th step, adjusts and weighs Thermofusion welding agent consumption.After by the crucible preheating of bottom belt tapping hole, blocked with aluminium backing Bottom tapping hole, adds Thermofusion welding agent, inserts safety match, covers lid.

6th step, is preheated with heating gun butt welding mouth, after temperature reaches cast temperature, removes heating gun, by the 5th step The crucible for installing Thermofusion welding agent is placed on above soldering opening, the tapping hole alignment weld bond center of crucible.

7th step, lights safety match, and welding personnel withdraws rapidly welding post to safety zone.Cast molding to be welded Afterwards, the demoulding after certain interval of time, cleaning polishing bus weld bond make weld bond keep clean and tidy.

Finally it should be noted that：The preferred embodiments of the present invention are the foregoing is only, the present invention is not limited to, Although being described in detail to the present invention with reference to the foregoing embodiments, for a person skilled in the art, which still may be used To modify to the technical scheme described in foregoing embodiments, or equivalent is carried out to which part technical characteristic. All any modification, equivalent substitution and improvements within the spirit and principles in the present invention, made etc., should be included in the present invention's Within protection domain.

Claims (1)

1. the method that aluminum cell bus-bar sweat soldering is repaired under electromagnetic field environment, comprises the steps：

The first step：Bus broken parts are carried out cutting, polished, it is desirable to which section more than 90% is shown in metallic luster；

Second step, measures the bus bar sizes that need to be repaired, and the repairing bus bar sizes determined by measurement carry out bus blanking；

3rd step, designs weld mold base plate and side plate according to bus specification；

4th step, is hung to installation position with the blanking bus that second step is made by Insulating Hanging Belt, adjusts weld bond gap, a good bus Side plate is clamped with bus, periphery gap asbestos cord, stone by support, erecting and welding mold bottom die and side plate with fixture or jackscrew Sand slurry closure is tight；

5th step, after the crucible of bottom belt tapping hole is preheated, blocks the tapping hole of bottom with aluminium backing, adds Thermofusion welding agent, Insertion safety match, covers lid；

6th step, weld bond preheating, after temperature reaches cast temperature, the crucible of the 5th step is placed on above weld bond, and crucible is poured Blowhole alignment weld bond center；

7th step, lights safety match, and after cast molding to be welded, the demoulding, cleaning polishing bus weld bond make weld bond keep whole It is clean.