Cold rolled silicon steel continuous decarburization annealing line (CNGO)

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

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