"Low-Carbon, Intelligent, High-Efficiency, and Low-Consumption" Technologies in Steelmaking and Continuous Casting
In alignment with national objectives for coordinated pollution reduction and carbon mitigation, ecological civilization advancement, and the implementation of a new development paradigm, the steel industry is accelerating its transformation toward carbon peak and neutrality. This transformation focuses on energy conservation, carbon reduction, comprehensive utilization of low-grade waste heat, and the adoption of advanced process integration technologies, such as "one-pot-to-end" hot metal transfer and continuous hot charging. Key technological pathways and improvement measures include:
1) Reduction of Hot Metal Temperature Loss
Standardization, refinement, and intelligent management of hot metal transportation; optimization of ladle insulation practices; and enhanced operational protocols for hot metal transfer.
2) Lean Steelmaking Practices
Implementation of technologies for dust recycling, low-slag steelmaking, and efficient dephosphorization to reduce raw material and alloy consumption while enhancing the recycling of solid waste resources.
3) Application of Converter Combined Blowing Technology
Adoption of high-intensity, long-life combined blowing processes, optimized oxygen lance nozzle designs, and advanced bottom-blowing configurations for improved efficiency and longevity.
4) Practical Application of CO₂ Bottom Blowing in Converters
Integration of CO₂ as a bottom-blowing medium to reduce carbon emissions and enhance metallurgical performance.
5) Regenerative (Oxygen-Enriched) Preheating Technology for Ladies and Tundishes
Utilization of regenerative heating systems with oxygen enrichment to improve energy efficiency and reduce heat loss in ladles and tundishes.
6) Energy and Auxiliary System Optimization
Steam balance and control in steelmaking, energy-saving control for dust removal fans, full-temperature waste heat recovery from converter flue gas, and ultra-low emission retrofits.
7) Key Technologies for Hot Delivery and Direct Rolling
Process integration measures linking steelmaking-continuous casting with direct rolling to minimize reheating and improve energy efficiency.
8) Steel-Rolling Coupling for Synergistic Cost and Efficiency Gains
Optimization of interface technologies between steelmaking and rolling to enhance coordination, reduce costs, and improve overall efficiency.
9) Lean Management Across the Production Process
Practices focused on temperature control, acceleration of process rhythms, and synchronization of operations to achieve efficiency improvements.
10) Development and Application of Critical Continuous Casting and Rolling Equipment
Advancements in key machinery and process technologies for high-efficiency continuous casting and rolling operations.
11) Digital Planning and Scheduling Systems
Implementation of intelligent production, supply, and marketing scheduling to achieve minimal inventory, maximize capacity utilization, ensure on-time delivery, and optimize the efficiency of iron-steel and steel-rolling interfaces.
These measures collectively support the steel industry’s transition toward a more sustainable, intelligent, and resource-efficient future, contributing to both economic and environmental goals.
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