CISDI is to upgrade Chongqing Steel’s bar and wire-rod rolling lines.

The upgraded bar rolling line will produce 1.80 million tonnes of 400-600MPa high-strength bars with specifications ranging from φ16mm to φ50mm. Its rolling speed will be a guaranteed 24 metres a second.

The revamped wire-rod rolling line will produce 900,000 tonnes of 400-600MPa high-strength ribbed coils, high-carbon, cold heading and spring coils. Its guaranteed rolling speed will be 115 metres a second.

The lines will be fitted with a number of CISDI’s core tech developments and equipment:

•     Groove-less rolling

•     Single pass rolling

•     Centralised control

•     High-precision closed-loop water cooling

•     TMCP

•     NHCD short-stress path rolling mill

•     CDMC standardised high-speed modular mill

•     FSCD flying shears

•     2-split high-speed charging onto the cooling bed.

CISDI is supplying the lines on an EPC basis and is also involved in the construction of Chongqing Steel’s dual high-speed bar line. This order was placed in April on an EPC basis and work is on schedule.

All three lines will be transformed to world-class capabilities.

CISDI’s NHCD standardised short-stress path rolling mill, pictured ready to leave the company’s manufacturing base in Jiangjin, Chongqing

CISDI’s CDMC standardised high-speed modular mill