Endless rolling and breakthroughs achieved at Yukun Iron and Steel

According to Danieli, the QSP-DUE technology is the most flexible, complete technology for hot-rolled strip production from 0.8 to 25 mm.

Operating Danieli QSP-DUE technology, Yukun is enjoying the widest production flexibility thanks to three operating modes –endless, semi-endless and coil-to-coil– which guarantee the broadest spectrum of steel grades and thicknesses, Danieli says. Casting records have been set recently on the Danieli-patented DySen caster: 145-mm-thick slabs have been regularly produced –a milestone on funnel moulds. Also, 165-mm-thick slab rolling was tested. Endless rolling has been established, reaching the minimum design thickness of 0.8 mm thick strip within the first seven campaigns from the beginning of the endless production. Coils showed excellent surface quality, precise geometric dimensions, and uniform microstructure and properties. This followed the production of thicknesses of 25 mm in the same line – according to Danieli, something unique in the world.
Managed by advanced and operator-friendly Danieli Automation process controls, featuring two casting strands and endless casting-rolling on one, the QSP-DUE plant operated by Yukun has a production capacity exceeding 4.5 Mtpy of hot-rolled strip, which is the highest in the world for a direct casting-rolling plant. The plant is designed to produce 0.8 to 25-mm-thick strip in low-carbon steel, medium-carbon steel, HSLA and medium-carbon high-alloyed grades. It incorporates more than 50 Danieli patents.
Source: Danieli