S&T

International status for two CISDI innovations

─── CISDI-SACS BOF and high-strength, high-speed CAL

Two of CISDI’s innovative science and technology projects have gained international status.

A group of experts have assessed and unanimously approved CISDI’s 4-point linkage suspension system for basic oxygen furnaces, and the company’s  high-speed continuous annealing line for high-strength steel, to world-class levels.

CISDI-SACS, an invention for basic oxygen furnaces, is based on the phenomenon of alternating elastic sliding, which affects the stability of a BOF’s mechanical linkage structure.

Since 2004 when the issue was first identified, research and engineering studies have achieved major breakthroughs in BOF safety and improving resistance to breakout.

The innovative 4-point linkage suspension system adapts itself to any over-constraint occurring in the BOF’s mechanical structure. It does so by building a model of an elastic framework. This has proven to be a remarkable upgrade of BOF operating stability, reliability and safety.

Already 26 furnaces, including Meishan Steel’s 250-tonne BOF, and Xinyu Steel’s 210-tonne BOF, have applied CISDI-SACS and have seen substantial economic and social benefits. CISDI-SACS expertise has been awarded four patents for invention and two patents for utility model.

CISDI’s research and development of a high-strength steel (780MPa) and high-speed (larger than 300m/min) continuous annealing line is a Chinese first.

Awarded four patents for invention, CAL expertise has seen successful applications at YIEH PHUI (CHINA) Technomaterial Co. and Anyang Steel in China.

CISDI’s CAL results:

Strip’s steady-state control and non-steady-state transitional control

Thermodynamic coupling control model in the L2 model, and the sectionalised, zoned wet skin pass mill

Simultaneous control of multi-tower loopers by compensating auxiliary roll speed

The CISDI-SACS BOF at Baosteel’s Meishan Steelworks has a tonnage of 250

CISDI’s high-strength and high-speed CAL at Anyang Steel