750 Hot Strip Mill in Steel Plant

Product Description

750mm hot rolled stainless steel strip production line

General description

The 750mm hotrolled stainless steel strip production line of Jinhai Stainless Steel Co.,Ltd. produces 1 million tons of hot rolled coils of various specificationsevery year.

The heating furnace control system adopts German Siemenss7-1500 programmable controller and Advantech industrial computer to form anadvanced and practical control system. The s7-1500 programmable controller runsthe software program to collect, process and transmit data, and has real-timecommunication with the upper computer (monitoring system). The industrialcomputer runs SIMATIC WinCC upper computer software to provide the systemmonitoring interface.

The heated slab is removed from the furnace scale andattached protective slag on the surface by the mechanical descaling machine andrough descaling box, and then sent to the rough rolling unit for rolling by theroller table, and the slab is rolled into an intermediate slab of 30 40mm.With the cooperation of the width gauge at the outlet of the roughingmill, the vertical roll mill adopts the hydraulic AWC automatic control systemto control the width of the intermediate billet; It also has the function ofending the head and tail (SSC). When the width of the head and tail is toowide, the width of the head and tail can be corrected through the SSC function

The reduction of finish rolling flat roll f1-f9 and Fe1stands is full stroke hydraulic reduction, which is electrically controlled byP201 and p202.

The automatic positioning control of roll gap is realizedby installing a large stroke hydraulic screwdown cylinder on the transmissionside and operation side of the frame to quickly drive the up and down of thesupport roll and work roll system, and the thickness fluctuation caused by thetemperature drop of strip steel is eliminated through the on-line roll gapadjustment, i.e. AGC control function, so as to achieve the purpose ofhigh-precision thickness, Produce high-quality finished strip steel.

The coiler adopts two full hydraulic underground coilerswith four auxiliary rollers. The strip steel is coiled on the drum under theaction of the auxiliary roller. A hydraulic side guide plate is set in front ofthe coiler to strictly align the strip steel; A pinch roll is set in front ofthe coiler to form a certain tension with the coiler when the strip head isformed and the strip tail comes out of the finishing mill.

Productioncapacity: the annual production scale is 1 million tons of hot rolled steelcoils.

Product variety: stainless steel: 200series, 300 series, 400 series.