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
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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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