Pickling method of hot rolled steel strip

Pickling method of hot rolled steel strip
　　 Hot-rolled baling steel strips and coils are rolled and coiled at high temperatures. The oxide scale formed on the surface of the baling steel strip under this condition can firmly cover the surface of the baling steel strip And conceal the defects on the surface of the strapping steel strip.
　　From the perspective of steel rolling, if these packaged steel strips with scale are sent directly to the cold rolling mill for rolling, it will cause many problems: ①Rolling under the condition of large reduction, The oxide scale will be pressed into the base of the packaged steel strip, which will affect the surface quality and processing performance of the cold-rolled plate, and even cause waste. ②After the iron oxide scale is broken, it enters into the emulsion system of the cooling and lubricating roll, which damages the circulation equipment and shortens the service life of the emulsion. ③The expensive cold roll has been damaged. Therefore, before cold rolling of the baling steel strip, the surface oxide scale must be removed to remove the defective baling steel strip. From the perspective of the production of hot-dip galvanized steel sheets, the use of hot-rolled baling steel strips for galvanizing is the same as cold-rolled steel sheets. Before galvanizing, the baling steel strips must have a clean and active surface. In order to obtain such a surface, the hot-rolled baling steel strip must be pickled.
　　 Currently commonly used packing steel strip pickling equipment mainly has three forms, namely semi-continuous pickling unit, continuous horizontal pickling unit and continuous tower pickling unit. There are other pickling methods.