Phi22mm ribbed twisted steel slit rolling method

The invention relates to a phi22mm ribbed twisted steel slit rolling method and belongs to the technical field of steel rolling production processes. The technical scheme includes: heating a steel blank, rolling by a rough rolling unit, rolling by an intermediate rolling unit after end cutting, rolling by a fine rolling unit after end cutting, and cooling to obtain a product after multiple length cutting; and subjecting a steel material to first flat rolling, first box-shaped hole preforming, first pre-slitting and slitting into two lines by the fine rolling unit, wherein sixth pass of the fine rolling unit adopts a flat roller, the steel material is preformed into a rectangular blank by a fining mill, and the slitting of the steel material is finally completed by a slitting guide at an outlet of a rolling mill, and completing slitting by the slitting guide. Equipment load of the first pass and the second pass are stably controlled to be about 90%, so that slit rolling of rough and intermediate full horizontal layout large-size twisted steel is realized, problems of torsion of rolled pieces at an inlet of the fining mill, frequent steel stacking at a slitting time port and the like are solved, and advantages, generated on production and equipment, of slitting production of phi22mm ribbed twisted steel are fully demonstrated.