Transforming Electric Furnace Slag into Treasure: A Circular Economy Path from Solid Waste Accumulation to Green Building Materials
Driven by the "dual carbon" goals, the hundreds of millions of tons of solid waste generated annually by the power industry are being transformed from an environmental burden into a strategic resource. For example, a large coal-fired power plant discharges over 2 million tons of slag annually. Traditional landfilling not only consumes land resources but also poses the risk of heavy metal leaching and pollution. Shibang Machinery, through its innovative "Graded Activation-Resource Regeneration" technology system, has successfully achieved the green conversion of electric furnace slag into high-performance fly ash, establishing a new model for solid waste management that combines "reduction, harmlessness, and resource utilization."
I. Technological Breakthrough: Overcoming Three Major Challenges in Solid Waste Recycling
Efficient Sorting and Purification Technology
To address the complex composition of slag, Shibang has developed a combined "air separation + magnetic separation + flotation" process:
A V-shaped static classifier achieves precise particle size control, achieving a 98% recovery rate for fine particles (0-5mm).
Equipped with a high-gradient permanent magnet drum, the iron impurity removal rate exceeds 95%, ensuring product chemical stability.
A silicon-calcium separation and flotation system increases the alumina content to over 35%, meeting high-end building material standards.
Gradient Activation Modification Process
Innovatively developed dual-effect "mechanical chemical activation + steam curing" technology:
Utilizing a vertical mill with a high pressure of 300 MPa, the vertical mill achieves an 82% deagglomeration rate for the vitreous structure.
A steam activation unit performs crystal phase reconstruction at 180°C for two hours, stimulating the volcanic ash activity to S95 grade.
The modified fly ash achieves a 28-day compressive strength ratio of 105%, exceeding GB/T 2016 standards. 1596 standard requirements
Full-process intelligent control system
Integrated IoT and digital twin technology:
Deployment of over 200 smart sensors to monitor key parameters such as temperature, particle size, and humidity in real time
Using AI algorithms to dynamically adjust process parameters, product quality fluctuations are reduced to ±1.5%
Equipped with a pulse dust removal system with a dust collection efficiency of 99.99%, achieving ultra-low emission production
