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Pusher-type pickling line is designed for removal of oxide from the surface of hot-rolled steel. The raw material at the PPPL is hot rolled metal. The front and back ends of the metal are cut with guillotine knives. The hot rolled metal passes through pickling baths, then through washing baths to remove hydrochloric acid from the surface of the metal. At the end of the washing process, the metal is trimmed on both sides and the metal is coiled. The output of PPPL is hot-rolled pickled rolled products in coils. The capacity of the line is 800,000 tons per year.
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2 - Stage
REVERSING COLD ROLLING MILL
Reversing cold rolling mill is designed for rolling hot rolled pickled metal and obtaining the required thickness. The raw material is hot rolled pickled metal. At the beginning of the rolling process, the coil is fed onto an uncoiler. Then the metal is rolled on a two-stand cold rolling mill until the required thickness is obtained. At the end of rolling, the coil is tied and transferred for further processing on a continuous hot-dip galvanizing unit. The capacity of the line is 750,000 tons per year.
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3 - Stage
CONTINUOUS HOT-DIP GALVANIZING LINE
The continuous hot-dip galvanizing line is designed for heat treatment of cold hardened metal and zinc coating. The initial raw materials are cold hardened and hot-rolled pickled metals. The process starts with coil stapling and alkaline washing of the strip. Then the metal enters a thermochemical furnace where it acquires the necessary mechanical properties. After heat treatment, the metal is immersed in a bath of zinc, where a coating of a given thickness is formed. It is then cooled and, if necessary, undergoes dressing. Irregularities are removed by a bending and stretching machine, after which an anti-corrosion solution is applied and drying is performed. Before winding, the strip is coated with preservative oil. The finished coil is tied and shipped to the customer. The capacity of the line is 500,000 tons per year.
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4 - Stage
POLYMER COATING AGGREGATE
The polymer coating unit is designed for applying polymer coating to galvanized rolled products. The starting raw material is hot-dip galvanized rolled steel. The process starts with cross-linking the ends of two coils, after which the strip goes through alkaline surface washing. After washing and drying, a conversion solution is applied to the strip to increase the adhesion properties of the metal, then it is dried in an oven. Next, the strip is primer coated on both sides using a primer coater. After primer coating, the strip is again dried in the oven. Then face and back enamel is applied to the strip, which is the finish painting. The color of the paint material is selected depending on the customer's requirements. After the finish painting, the strip is dried in the finishing oven at a temperature up to 245℃. At the end of the process, the strip is coiled, tied and shipped to the destination.
