In-situ spraying reparation method of horizontal aluminum busbar in electrolytic plant

A repair method and electrolysis plant technology, applied in the direction of coating, molten spraying, metal material coating technology, etc., to achieve the effect of simple process method, improved bonding strength, and improved bonding performance

Inactive Publication Date: 2012-09-19
QINGTONGXIA ALUMINUM GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of the above-mentioned prior art, and provide a method that can be completed in the electrolysis plant, can effectively avoid strong magnetic field interference, reduce labor intensity, consume less labor and materials, operate simply and quickly, and repair the wear resistance of the layer. Excellent repairing and remanufacturing method for surface defects of horizontal bus bar in upper structure of aluminum electrolytic cell An in-situ spraying repair method for horizontal aluminum bus bar in electrolysis plant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: 120kA prebaked anode electrolyzer superstructure horizontal bus bar has 550mm, width 140mm, average depth of about 1mm arc crater and scratches, the repair method includes the following steps:

[0028] a. Check the status of the busbar and smooth the surface of the busbar: in the electrolysis workshop, use a hand-held grinder to grind the obvious protrusions, burrs, edges, welding spots, etc. hand is appropriate;

[0029] b. The surface of the busbar is pretreated. After pretreatment, the surface of the substrate must reach Sa2.5-3.0 level, revealing a uniform and consistent metal color: that is, use quartz sand to blast and derust the surface of the busbar for 2 minutes to remove the oil on the surface of the busbar. and rust, the surface of the substrate after pretreatment should reach Sa2.5-3.0 level, revealing a uniform and consistent metal color;

[0030] c. The surface of the busbar is roughened, and the surface roughness or riveting depth reaches 4...

Embodiment 2

[0033] Embodiment 2: Arc craters and scratches of 550 mm in width, 140 mm in width, and about 1.2 mm in average depth appear on the horizontal bus bar of the upper structure of the 150kA prebaked anode electrolytic cell. The repair method includes the following steps:

[0034] a. Check the status of the busbar, and smooth the surface of the busbar: that is, in the electrolysis plant, use a mobile hanging milling cutter to pre-mill out a rectangular plane of 550mm, 180mm wide, and 1.5mm deep at the part to be repaired;

[0035] b. The surface of the busbar is pretreated. After pretreatment, the surface of the substrate must reach Sa2.5-3.0 level, revealing a uniform and consistent metal color: that is, the surface of the busbar is sandblasted for 3 minutes with steel grit to make the surface roughness reach 40-80μm, complete the spray repair work within 4 hours;

[0036]c. The surface of the busbar is roughened, and the surface roughness or riveting depth reaches 40-80μm;

[0...

Embodiment 3

[0040] Embodiment 3: Arc craters and scratches of 550 mm in width, 140 mm in width, and about 1.0 mm in average depth appear on the horizontal bus bar of the upper structure of the 200kA prebaked anode electrolytic cell. The repair method includes the following steps:

[0041] a. Check the status of the busbar, and smooth the surface of the busbar: in the electrolysis plant, use a mobile hanging milling cutter to pre-mill out a rectangular plane of 550mm, 180mm wide, and 1.2mm deep at the part to be repaired;

[0042] b. The surface of the busbar is pretreated, and the surface of the substrate after pretreatment must reach Sa2.5-3.0 level, revealing a uniform and consistent metal color:

[0043] c. The surface of the busbar is roughened, and the surface roughness or riveting depth reaches 40-80μm: that is, the manual striking process is used to create diffusely distributed pits on the surface of the busbar;

[0044] d. Use arc spraying technology to spray the primer and workin...

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Abstract

The invention relates to a reparation method of an aluminum busbar, in particular to an in-situ spraying reparation method of a horizontal aluminum busbar in an electrolytic plant. The method comprises firstly checking conditions of the busbar, performing leveling processing on the surface of the busbar, then performing preprocessing on the surface of the busbar to enable the preprocessed matrix surface to reach Sa 2.5-3.0 grade and to expose uniform metal natural color, performing rough processing on the surface of the busbar to enable roughness or riveting line depth of the surface to reach 40-80mu m, utilizing the electric arc spraying technology to spray a base layer and a working layer on the surface of the damaged busbar, finally utilizing a movable suspension milling cutter to mill the coating surface, and performing clean and smooth processing to complete the reparation of the horizontal aluminum busbar. The method can be achieved in the electrolytic plant, can effectively avoid interference of a strong magnetic field, reduces labor strength, has less consumption of labor and materials and simple and fast operation, can repair surface defects of the horizontal busbar serving as the upper structure of an aluminum cell, and can reproduce a repairing layer with excellent abrasion performance.

Description

technical field [0001] The invention relates to a method for repairing an aluminum busbar, in particular to an in-situ spraying repair method for a horizontal aluminum busbar of the upper structure of an electrolytic cell in an electrolysis plant. Background technique [0002] In recent years, my country's aluminum industry has developed rapidly, and the output of electrolytic aluminum ranks first in the world. Aluminum production technology has reached or approached the world's advanced level in many aspects. As a modern large-scale aluminum electrolytic cell, the prebaked anode electrolytic cell has the characteristics of less pollution, high technical indicators, low power consumption, and high degree of automation. It has been more and more widely used in my country's electrolytic aluminum industry. In order to ensure normal electrolytic production, all anodes should be replaced at least one month. The anode consumption needs to lift the horizontal bus bar up and down. D...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/08C23C4/02C25C3/16C23C4/131
Inventor 杨宏伟张国栋杨勇张晓军尚文祥张建强张富巨李海琦
Owner QINGTONGXIA ALUMINUM GRP
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