Steelmaking

CISDI is committed to building green, smart and highly efficient, high quality steelmaking plants at a competitive cost. Being a master of steelmaking process, equipment, automation control, model and IT, CISDI ably provides the engineering, package supply and turnkey services for global clients for hot metal pre-treatment, BOF, EAF, CAS, CAS-OB, LF, RH, VD/VOD and related projects.

Core technologies：

CISDI-SACS (Self-Adaptive Constraint System) 4-point linkage suspension system

A patented invention A wealth of knowledge and experience in the application of 4-point linkage suspension system to 13 of the 57 references of CISDI-SACS BOFs Suspension system characteristic of uniform distribution of loads, resulting in low stress and deformation to trunnion ring and converter shell, safe operation with built-in redundancy and an enhanced service life BOF tilting with smooth stability through the acceleration / deceleration curve Suspension system and supporting bracket free from maintenance

CISDI-Green EAF

Over 60 years of EAF-dedicated design, manufacture and research has seen the exported conventional HI and UHP EAFs attaining the world’s leading technical figures, represented by the power consumption of pure scrap smelting of 385kWh/t?liquid steel. CISDI developed FocusArc EAF and AutoArc EAF in response to the national call for environmental protection and energy conservation. Such new equipment has become the model for continuous scrap charging and preheating method. Fully automatic and enclosed charging of scrap Penetrated preheating of scrap, enhanced scrap specification, putting preheating time under control Top-side-chute charging structure, targeting charges to the center of EAF heating, improving the cold zone inside the furnace, and enhancing thermal efficiency Good control of fume temperature during scrap preheating process, whist at the same time taking care of dioxin control CISDI-DMI-AC electrode regulation system: giving the capacity of reducing power consumption by 15~25kWh/t?liquid steel

Dual-position LF with reliable electrode rotation mechanism

LF lid with inert gas and full water cooling, extending service life Overhead structure for lid lifting, safe and reliable Electrode rotation mechanism: rotating spindle and double support wheels, allowing precise reset position Efficient electric energy input and smart electrode regulation system: greatly reducing refining power consumption to 0.45kWh/t?℃ Integrated argon flow control expertise Smelting model expert system: controlling S content in the range of 5~10ppm and T.O. within 10ppm

Single Ladle Hot Metal Transport System

CISDI has developed the technology for a unique compact single ladle transfer of hot metal from ironmaking to steelmaking workshop. It replaces the traditional need for a railway transfer system, instead utilising car or truck. This technological solution, when combined with steelmaking logistics simulation, enables CISDI to create tailor-made, practical solutions for actual site conditions.

?

?

?

IGBT DC Power-based Super-ARC EAF, Yunnan, China
A world first, and achieving world-class technical and economic performance indicators

?

?