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SUNNY TECHNOLOGIES
INCORPORATION LIMITED
Address: #101，No.6 Gaoxin Road，East Lake Hi-Tech Development District，Wuhan，P.R.China
#2，Guangzhou Road，Tuanchenshan Development District，Huangshi，P.R.China
E-mail: spt@sunnychina.com.cn
Tel: 156 7177 7755/027-59715061
Fax: 027-59715060
SOLUTION
Cold rolled silicon steel continuous decarburization annealing unit (CNGO)
Detailed introduction
Non-oriented silicon steel （CNGO） after cold rolling is surface degreased, and subjected to decarburization annealing and recrystallization annealing under a protective atmosphere to reduce the carbon content of the strip to a specified range, so that the grain grows and the magnetic level is improved., eliminate stress and apply insulation.
The main technical parameters
Raw materials: non-oriented electrical steel （Si ≤ 2.0%） cold-rolled hard 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, exit section 0-200mpm
Annual production: 200,000tpy
Energy-saving mode: comprehensive utilization of waste heat recovery, SUNNY patent
Continuous decarburization annealing furnace: no oxidation heating （NOF） + full radiant tube heating （RTF）, vertical, horizontal
Fuel type: natural gas, liquefied petroleum gas
Decarburization method: continuous decarburization of shielding gas
Insulation coating: using roll coater + coating drying and curing
Welding equipment: narrow lap seam welder
Degreased form: chemical degreasing + electrolytic degreasing + tertiary 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
Unwinding→welding→degreasing (alkali spray→alkaline scrubbing→electrolytic degreasing→hot water washing→drying→decarburization annealing→cooling→coating insulation layer→sintering→cooling→surface inspection→division→rolling.
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