OREANDA-NEWS. January 29, 2014. The thermal test was successfully conducted for the finishing mill group of alloy-steel rod production line of Shandong Shouguang Juneng Special Steel Co., Ltd.

The complete supply of the equipment is provided by CISDI Engineering Group (CISDI Group). Among these devices, the NHCD950 rolling mill is the largest short-stress-path rolling mill, with the maximum roller diameter of 950mm, which can be used for production of quality-steel large section bar of 300mm. As matter of fact, only a few domestic manufacturers are capable for design and supply of this kind of rolling mill.

The NHCD series of short-stress-path rolling mill is the core equipment with proprietary intellectual property rights of CISDI Group, of which quite a few indicators have been rated to be of international advanced level.

It has been widely utilized by domestic steel works in the cogging mill, the roughing/intermediate mill and finishing mill for production of rods, bars and sectional materials. CISDI Group has achieved the following several innovation results in the research of this devices: (i) large cross-section roller diameter and pull rod are employed, an innovative structure is designed with the central supporting rod and built-in disc spring, which have formed into a rolling mill of high strength and high rigidity.

This will improve the stability, keep the balance of the equilibrant and meet the demand for rolling of quality steel; (ii) the U-shaped arm of the roll bearing chock is directly fixed on the drag link bearing, so as to prevent roller from moving in axial direction and avoid horizontal force for the pull rod; (iii) the central suspension method is employed for large rolling mill, while the hydraulic-cylinder diagonal suspension method is employed for small rolling mill, so that the tip-over problem during hoisting of large rolling mill can be resolved, and the smooth lifting of the vertical mill can be ensured; (iv) the guide/guard base is directly equipped on the mill slide, so as to enhance the stability of the guide/guard components of the mill, as well as the rolling precision of the product; and (v) the largest size of the roller is 1000mm/850mm?1350mm, filling the gap of large short-stress-path rolling mill in China.

Shandong Shouguang Juneng Special Steel Co., Ltd. is the largest special steel production base in Shandong Province. The alloy-steel rod production line is mainly used for production of quality-steel rod of 60mm-300mm and the rectangular bloom of 150mm?150mm and 180mm?220mm, with an annual output of 800,000 tons. Under this project, CISDI Group is responsible for supply of 27 sets (in two sizes) of NHCD large mill.