1.1 Brief Introduction: The production line is a continuous annealing hot-dip aluminum zinc mill for cold-rolled strip, with a design production capacity of 150000 tons per year. The raw material is cold-rolled hard coil SPCC, the specification is not 800-1250mm * 0.2-1.2, and the design unit process section speed is 120mpm. In the process section of the unit, the configuration of the unit can complete annealing reduction and aluminum zinc plating. (reserved) skin pass mill, tension leveller , passivation, fingerprint resistance and (reserved) oiling, etc. the product quality meets the Q / bqb425-2004 standard. The total length of the unit is about 165m 1.2. Main features of the unit: 1) It adopts the most advanced and widely used production process from United states Corp process in the world 2) It adopts advanced technology to produce normal aluminum zinc flower and (reserved) polished zinc flower products. 3) It Sets the strip cleaning section, using advanced and practical chemical deesterification combined with electrolytic degreasing technology to enhance the degreasing effect and remove the oil stain and iron powder on the strip surface. 4) it sets up vertical bright continuous annealing furnace, electric heating, simple heating control, good shape. 5) The steel strip cooling in the furnace adopts a protective gas circulation jet cooling device, and adopts frequency conversion adjustment. The strip steel has a fast and uniform cooling speed, and can accurately control the temperature of the strip into the zinc pot. 6) The furnace is made of light fiber lining, which has fast construction and low thermal inertia. 7) The spray-type ceramic induction clock aluminum-zinc pot suitable for the aluminum-zinc heating process has the advantages of fast heating, uniform temperature, long service life and less zinc slag. 8) Using Shanli's improved FK series air knife with independent intellectual property rights to control layer weight and quality 9) (reserved) wet finishing machine can effectively improve the strip type and surface quality and improve the cold impact performance of the product. 10) Using two-bend and one-leveling machine, it can effectively improve the shape and surface quality of the strip and improve the competitiveness of the product. 11) (reserved) electrostatic oiler to apply oil to the strip 12) CPC, EPC use imported equipment to ensure stable production of the unit 13) Adopting AC frequency to adjust the transmission control system, the man-machine interface is good, and the equipment stacking is simple.
1.3 Technical data of finished products Width: 800-1250mm The inner diameter: 508mm-610mm The outer diameter: 900-2100mm The max weight of steel coil: 25ton The mechanical properties: Yield strength: σs= max 710N/cm2 1.4.3 Product performance The product level is cq-100%, which can produce DQ products. Executive standard Q / bqb425-2004 1.4.4 zinc layer status Normal aluminum zinc flower and reserved polished aluminum zinc flower Weight of zinc layer: 60-180g / m2, double-sided 1.4.5 Post plating treatment (reserved) skin pass mill, tension leveller, passivation / fingerprint resistant (oiling) treatment The technical data of the incoming steel coil : The thickness of steel strip:0.2-1.2mm The width of the steel strip: 800-1250mm The inner diameter of the steel coil:508mm/610mm The max weight of the steel coil: 25ton The outer diameter of the steel coil: 900mm-2100mm Finished product It conform to the national standard: Q/Bqb425-2004 Strength limit: CQ: σb =270-480Mpa Inner diameter of steel coil: 508mm; 610mm Steel coil weight: Max 10 ton The outer diameter of steel coil: 900mm-1500mm The unit speed: the entrance and exit section: 0-150m/min the process speed: 0-120m/min threading speed: 25m/min the capacity of the unit: 150,000ton /Year the layout of the galvanizing line: from steel strip moving direction, the transmission section is on the right side. The total length of the units is 165m, the highest point is 33.5mm, the widthest point is 12m.
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