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Cold rolled silicon steel continuous decarburization annealing line (CNGO)

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Degrease the surface of the cold-rolled non-oriented silicon steel (CNGO), and perform decarburization annealing and recrystallization annealing in a protective atmosphere to reduce the carbon content of the strip to the specified range, so that the crystal grains will grow and the magnetic level will be improved , Relieve stress, and apply insulation layer.
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  Degrease the surface of the cold-rolled non-oriented silicon steel (CNGO), and perform decarburization annealing and recrystallization annealing in a protective atmosphere to reduce the carbon content of the strip to the specified range, so that the crystal grains will grow and the magnetic level will be improved , Relieve stress, and apply insulation layer.

  The main technical parameters

  Raw material: non-oriented electrical steel (Si≤2.0%) cold rolled hardened steel coil W470-W1300

  Strip carbon content: C≤50ppm

  Strip thickness: 0.35-0.65mm

  Strip width: 900-1250mm

  Product: Electrical steel cold rolled coil

  Representative specifications: 50W470-50W60050W800-50W1300

  Quality Standard: GB/T2521-1996

  Carbon content: C≤27ppm

  Unit speed: inlet 0-200mpm, process section, 0-135mpm, outlet section 0-200mpm

  Annual output: 200,000tpy

  Energy-saving method: Comprehensive utilization of waste heat recovery of exhaust gas, SUNNY patent

  Continuous decarburization annealing furnace: non-oxidizing heating (NOF) + full radiant tube heating (RTF), vertical and horizontal

  Fuel type: natural gas, liquefied petroleum gas

  Decarburization method: continuous decarburization of protective gas

  Insulation coating: using roller coater + coating drying and curing

  Welding equipment: narrow lap seam welder

  Degreasing form: chemical degreasing + electrolytic degreasing + three-stage water rinsing, vertical or horizontal

  Electrical control system: SIEMENS or ABB AC variable frequency automatic control system

  Industrial automation: SIEMENS or ABB intelligent automatic control system

  Main production process

 
主要技术参数
 
  Uncoiling→welding→degreasing (alkali spray→alkali scrubbing→electrolytic degreasing→hot water cleaning→drying)→decarburization annealing→cooling→insulating layer coating→sintering→cooling→surface inspection→splitting→coiling
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