Continuous Annealing Line

Line main feature: Raw material:strip width: 600-1500min, thickness: 0.2-1.2 (1.5) mm Cold rolled low carbon iron SPCC, SPCD, FH, accords with GB13237-91, JIS G 3141-1996 Product quality: accords with GB 13237-91 Line speed: entry section 0-240mpm; process section 0-180mpm; exit 0-240mpm Annum output: 100,000 - 300,000 tpy Energy saving style: heat recovery of flue gas, SUNNY patent Continuous annealing furnace: Radiant tubes heating (RTF), vertical Fuel type: natural gas, liquefied petroleum gas, mixed gas, coke oven gas and electricity Welding machine: narrow lap seam welder Degreasing style: chemical degreasing+ electrolytic degreasing+ three stages water rinsing, vertical or horizontal Skin pass mill: four-roll wet, max. roll force 6000KN Tension Leveler: two bend units, one straighten unit Oiling style: electrostatic oiling Electric system: PLC, AC frequency conversion control system Automatic instrument: PLC, intelligent auto control systemLine technics flow: According to the function of the line and the process sequence of the strip, the line can be divided into entry section, process section and exit section. The entry section mainly includes payoff reel, crop shearing, welding and degreasing procedure, which provides the processing section with continuous strip material. The process section mainly includes annealing, skin pass mill, Tension Leveler, and thus finishes the technical processing of the strip. The exit section takes charge of parting cutting and reeling of the strip.The technics flow shows below: Coil loading→ payoff reel→ crop shear→ welding→ degreasing (alkali spray + alkali brush+ electrolytic cleaning+ water brush + 2 stages water rinsing) → dryer→ (entry looper→) heating → heat soaking → quick cooling→ overage→ re-cooling →water quenching →dryer → skin pass mill → Tension Leveler→ (exit looper→) edge cutting → inspecting →oiling→ cutting→ tension reel→ coil unloading→ packing