Annealing Unit

Annealing Furnace Unit

Annealing treatment is one of the important procedures during steel stripcold rolling production procedure. The annealing is functioned to remove theinner rolling stress of steel strips, improve mechanical property and clean thesurface of steel strips. Annealing equipments can be categorized into bell typeannealing furnace and continuous annealing furnace. Our company usually undertakescontinuous annealing furnace projects.

Continuous Annealing Furnace Features

◆Applicableto large volume production of single variety;

◆Shortannealing period and high productive efficiency;

◆Goodtemperature uniformity and good surface quality of finished product;

◆Complicatedtechnology with large one-time investment;

◆JJRS self-developed“JJRS-Sendzimir” technology with lots of technicalpatents;

◆Energycyclic utilization saves running cost and decreases annealing cost;

◆Fuels applicablefor wide use: Natural gas, cooled coal gas, blast-furnace gas, coke oven gas,etc.

◆Advancedfurnace structure, perfect heat preservation, even and stable temperaturecontrol;

◆Higher-level automation could realize automaticcontrol, automatic detection, safety protection, automatic report andlong-range control etc.

Technical Parameters

Cold rolling plates conform to national standardGB/T710-2008.

Material: Cold rolling low carbon steel

Steel type: Q195, Q215, Q235, SPCC, SPCD

Thickness of steel strip: 0.2-1.2mm

Width of steel strip: 800-1,250mm

Inner Dia. of coil: φ508mm/φ610mm

Outer Dia. of coil: φ1,000mm-2,100mm

Weight of coil: Max. 25t

Product grade: CQ, DQ

Treatment after annealing: finishing, leveling, oiling

Product inspection standard: GB13237-91、GB/T2518-2004、GB/T15675-1995、GB3522-83

Annual output: 150,000t/y

Processing speed: 120m/min

Process Flow

Coil loading → decoiling → shearing thefront and rear part → welding → entry accumulator → alkali dipping → alkalibrush washing → electrolytic degreasing → hot water brushing washing → 1^stwashing → 2^nd washing → hot air blowing → preheating → heating →soaking → fast cooling → overaging → final cooling → water-quench cooling → hotair blowing → medium accumulator → temper mill → leveler → cutter → exit accumulator→ electrostatic oiling → exit shearing → recoiling → coil unloading

Coil loading →原料

decoiling →开卷

shearing the front and rear part →切头尾

welding →焊接

entry accumulator →入口活套

alkali dipping →碱液浸洗

 alkali brush washing →碱液刷洗

electrolytic degreasing →电解脱脂

hot water brushing washing →热水涮洗-

1^st washing →水洗1

 2^nd washing →水洗2

 hot air blowing →热风吹扫

preheating →退火炉预热段

 heating →退火炉加热段

soaking →退火炉均热段

fast cooling →退火炉快冷段

overaging →退火炉过时效段

 final cooling →退火炉终冷段

 water-quench cooling →淬水冷却

hot air blowing →热风吹扫

medium accumulator →中间活套

 temper mill →平整机

leveler →拉矫机

cutter →切边机

exit accumulator →出口活套

electrostatic oiling →静电涂油

exit shearing →出口剪

 recoiling →卷取

coil unloading下料