Revamped hot strip mill running smoothly at Yanshan

Yanshan Steel’s 950mm hot strip mill, rebuilt by CISDI on an EPC basis, has started up successfully and the first coil production has been unloaded from the coiler.

CISDI have been assisting in Yanshan’s determined bid to make its plant greener, more economical and ever more productive for the last 5 years.

Its newly-built 1,780mm and 1,580mm production lines were carried out by CISDI in 2013 and 2016, respectively.

The 950mm production line had been in operation since 2007 and its automation system had been upgraded multiple times over the years. This latest rebuild will enable the mill to reach an annual capacity of 1.80 million tonnes.

CISDI faced numerous difficulties during the project, not least the complex task of co-ordinating 19 construction companies. The L1, L2 and L3 (MES) automation systems and mechanical and hydraulic equipment have been rebuilt.

A R0 roughing mill stand was added and the AWC electric drive was changed to hydraulic drive for operating the R1 roughing mill stand. In addition, the electrically-driven finishing mill looper has been switched to hydraulically-driven.

The hot test was completed in just five days. Hot mill production was running normally immediately after the line ramped up its capacity within 10 days.

The daily quantity and final quality of coils have been greatly improved and 2.0mm thin specification product is now in mass production.

The first coil being created on the coiler at Yanshan Steel’s rebuilt 950mm hot strip mill