Packaging steel strip of thin slab continuous casting and rolling process is how to?

Packaging steel strip of thin slab continuous casting and rolling process is how to? Answer: the thin slab continuous casting and rolling process is mainly composed of continuous casting, soaking, rolling and smooth volume classification of 4 part of the process. Each part of the process is introduced as follows: ( 1) Continuous casting process. Refining will have refining of molten steel ladle across the crane on ladle jib rotary tables, rotary table at the top of the manipulator to ladle cover on the ladle, then rising and rotate it 180 rotary arm & deg; Above across transfer ladle to continuous casting crystallizer, connect a long nozzle, open the liquid steel ladle slide gate will note baked good inside the tundish. When molten steel in ladle up after scheduled height, open the tundish stopper, added liquid steel to the crystallizer, as required above immersion type nozzle of liquid steel in mold steel export flow after a certain height, to add protection slag into liquid steel, and then automatically open mould vibration device and the pinch roll for throwing. At the same time, the fan section of the two main valve to open the water spray cooling, cold water mold liquid level control testing system, tracking system for people to work. When the slab head from fan 1 into the fan-shaped section II, signal tracking system, the fan I arc side implementation in the period of liquid core is under pressure, the casting from 50 - Pressure to 45-70 - mm 50 mm, slab head after the fan section III continue straight down and through the top bending. Top the slab head bending, bending action with casting off the dummy bar. Then the top further the slab head bending roll top bending radius is 3. The circular arc of the 25 m online, under the guidance of the arc guide section bending roller, slab along the bend radius into the machine. Slab along the horizontal direction after straightening, grey head across the pendulum shear, pendulum shear action precision cutting, cutting head fell into the cutting head, in the slab continue to move into the soaking pit. ( 2) Roller hearth furnace soaking process. Through roller-hearth furnace heating, soaking, heat preservation buffer role. When the casting billet continuous caster casting the casting speed in roller hearth furnace and completely by heating period at the end of the slab after, began to accelerate to top speed of 65 m/min, and through the transmission section, ferry into insulation section and subsequent casting distance, the necessary buffer time. To heat and good casting mill first bite leaves soaking pit, into the mill. When from the first second of slab casting machine to cast speed into the no. 2 furnace and slab by this furnace tail after the heating period, plate began to accelerate, also with maximum speed through the transmission section, until the end of the furnace of the ferry. After being two rotational stove ferry service recovery, the slab forward to no. 1 furnace heat preservation period of access to the mill for rolling and rolling speed. 850 - the slab charging temperature 1050 ℃, the slab on temperature is 1100 - 1150 ℃, the optimal control by a computer system, and ensure that along the length direction and the thickness precision of the direction from the target temperature of slab & plusmn; The requirements of 10 ℃. ( 3) Rolling process. After casting, roller conveyer slab by accident will be cut to high pressure water descaling device with high pressure water to remove iron oxide and the residual slag, and then into the finishing mill group of rolling to thickness. Hangang for slab thicker, roughing mill will set up an irreversible type slab rolling finishing mill rolling to 35 mm thick. In order to ensure the accuracy of strip steel, controlling profile peace straight degrees, finishing our rack is equipped with CVC system, WRB system, AGC system, PCFC system and measuring instrument and quick roll change device. Laminar cooling device according to the steel grade, different specifications of the strip according to the corresponding finishing temperature cooling system cooling to the coiling temperature. Strip into three helps roll down coiler, swept with a certain diameter of steel coils. Discharging coil car will take off and sent to the coil steel coil car, walking beam by rotating the no. 1, no. 2 walking beam, including passing through inspection, weighing, baling steel strip, spray printing operations. Then, steel roll was shipped to put or sent to finishing across the flat steel coil stock volume classification. ( 4) Flat volume classification process. Crane coil to coil to be prepared for the stand, dismantle strapping tape, cut head, use cart to coil bound for uncoiler open book, and the pinch roll straightening machine, trimming machine. The flat strip again by dividing shear points respectively. Level off, after the segmentation of strip steel which are then rewinded into coils by the winder. Then, coil by coil car removed from the reel and be sent to the walking beam transport machine, weighing, baling, spray print. Finally, the crane unloaded the coil finished-product stock waiting for shipment.