Equipment Manufacturing: Our breakthrough product – the separately-driven reducing and sizing mill

The reducing and sizing mill plays a critical role in the production of special steels and building steel.

Much is demanded of this key equipment. It has to cope with a heavy rolling load and adapt to a wide range of product specifications, achieve a fast rolling speed and a high product dimensional precision.

CISDI began its research and development for the reducing and sizing mill back in 2012.

Its continued focus on the mill’s core process and its equipment and control has resulted in a number of major breakthroughs, leading to the development of the modular, separately-driven reducing and sizing mill, the high-speed pinch roll and laying head units.

These outstanding products are at the cutting-edge of China’s high-speed wire-rod rolling technology. They have won around 40 patents and achieved world-class indicators for rolling speed and product precision.

 

 

The SRSCD mills, made at CISDI Equipment Co in Chongqing‘s Jiangjin District

 

First application in China

CISDI’s dual-module SRSCD mills saw their first application at a stainless steel high-speed wire-rod rolling line at Yasheng Metal Products Co. in China’s Jiangsu Province.

They enabled the ultra-precise production of small wire-rod to be controlled to within plus/minus 0.05 millimetre, a world-leading level, and laid a solid foundation for CISDI to outperform their rivals in China’s high-speed wire-rod rolling sector.

 

SRSCD mills operating at Yasheng’s high-speed wire-rod rolling line

 

Improving speed by 25 per cent

CISDI put its dual-module SRSCD mills into operation at a single high-speed wire-rod rolling line at Jianlong Group Ningxia, which is based in China’s Ningxia Hui Autonomous Region.

The mills replaced original equipment and improved the line’s rolling speed by 25 per cent.

Rebar coil, in a diameter of 6 millimetres, is produced at a speed of 105 metres per second, a record for Chinese-manufactured lines.

The mills’ high performance indicators have smashed their designed targets.

 

 

 

The SRSCD mills at Jianlong Ningxia’s wire-rod rolling line operate at a speed of 100-plus metres per second

 

Mill tech highlights:

✧       Product specification: ranging from 5.0 to 25 millimetres in diameter

✧       Rolling speed: a maximum of 115 metres per second

✧       Rolling precision: plus/minus 0.1 millimetre

✧       Single pass: simplified pass schedule

✧       Free-pass rolling: highly competent in expanded product specifications and able to meet special specification rolling

✧       Modular design:

•          separate modular designs for the reducing mill and the sizing mill

•          a compact structure

•          bearing a heavy load

•          flexible applications with a separate reducing mill from a sizing or combined reducing and sizing mills.

 

CISDI’s SRSCD mills are now in use at over 30 rolling lines across China, including Baowu, New Tianjin Steel and Shengquan steel plants. Supplying SRSCD mills to a wire rod and BIC line for Yieh Hsing Steel in Taiwan is now top of CISDI’s design and manufacture agenda.

The mills’ innovative core tech, which creates higher-speed rolling and more accurate production, is making them much sought-after in the market.

They have become a major brand product for CISDI, which is playing an active role in transforming China’s wire-rod rolling equipment.