The latest information about Yuntian can be found here
Upgrading slag blocking technology brings new breakthroughs to converter steelmaking process
2025-09-28
The continuous upgrading of slag blocking technology is driving the development of converter steelmaking process towards a more efficient, intelligent, and environmentally friendly direction. From three dimensions of technological innovation, process breakthroughs, and future trends, we will deeply analyze its industry impact:
Slag blocking plug
1、 Core technology upgrade direction
1. Material system innovation
Nanocomposite refractory materials
Adopting Al ₂ O ∝ - ZrO2 ₂ - TiC nano coating, the corrosion resistance of molten steel is improved by 300%, and the service life is up to 8-10 times, reducing the cost by 40% compared to traditional materials.
Adaptive density design
By using hollow ceramic microsphere embedding technology (with adjustable density range of 5.2-6.8g/cm ³), dynamically matching different steel tapping requirements (such as differential control between high manganese steel and low carbon steel).
2. Intelligent control system
Multi modal perception delivery
Integrating infrared thermal imaging (slag layer thickness recognition)+laser radar (steel outlet positioning)+AI algorithm (timing prediction), achieving an accuracy of ± 0.5 seconds (China Baowu 2023 industrial test data).
Digital twin verification
Establish a fluid dynamics model (ANSYS Fluent simulation), simulate the slag blocking process, and optimize the plug structure. The failure rate of slag blocking in a certain steel plant has decreased from 5% to 0.8% after application.
2、 Breakthrough progress in technology
1. Quality control
Ultra low oxygen steel smelting
The slag blocking plug and RH vacuum collaborative process ensure that the endpoint [T.O] is ≤ 15ppm (traditional process ≥ 25ppm), meeting the steel demand for new energy vehicles.
Trace element control
The barrier efficiency for residual elements such as Pb and Sn reaches 92% (based on data from Shougang Jingtang in 2024), solving the problem of component fluctuations caused by scrap steel circulation.
2. Disruptive improvement in energy efficiency
Thermal cycle utilization
Develop a heat storage slag blocking plug (phase change material heat storage), recover 300-400 ℃ waste heat from the steelmaking process, preheat alloy additives, and save 1.2kgce per ton of steel.
Short process integration
Combined with the "one tank to the bottom" process, it reduces the temperature drop of steel water by 8-10 ℃ and shortens the smelting cycle by 2-3 minutes.
3、 Collaborative value of industrial chain
1. Expansion of advanced steel grades
High strength steel production
After slag blocking, the content of [N] remained stable at ≤ 25ppm, which increased the qualification rate of 1200MPa automotive board from 88% to 96% (case study of Ansteel Benpu production line).
Ultra thin silicon steel
The size control of inclusions is ≤ 20 μ m, supporting the mass production of 0.18mm ultra-thin non oriented silicon steel (Baosteel B18AH075 grade).
2. Green smelting closed-loop system
Utilization of slag resources
Low iron content slag (FeO<5%) is directly used as a cement admixture, with an added value of 50 yuan/ton compared to traditional processes.
Carbon reduction contribution
For every 1kg reduction in slag steel mixing loss, it is equivalent to a 1.8kg reduction in CO ₂ emissions (measured by the World Steel Association).
4、 Frontier exploration direction
Quantum dot temperature measurement slag blocking plug
Embedded fluorescent temperature sensor, real-time feedback of molten steel temperature (± 3 ℃ accuracy), linked with dynamic metallurgical model.
Self decomposing environmental design
Develop MgO CaO based biodegradable materials, which can be converted into refining slag modifiers after use.
Metaverse operation and maintenance system
Realize 3D visualization of slag blocking process through AR glasses to assist engineers in remote diagnosis.
The breakthrough of this technology confirms the development logic of the steel industry's "minimally invasive innovation and leveraging big changes", providing a Chinese solution for global green and low-carbon smelting.
Previous Page:
Real-time Information
Contact Us
No. 513 Yucui Road, Yushan District, Ma'anshan City, Anhui Province
Email:ahyuntian@ahyuntian.com
Tel:+86-4006055519
Add: 513 Yucui Road, Yushan District, Ma'anshan City, Anhui Province
Leave a Message
25 Years Dedicated to Ladle Slag Barriers Serving Steel Mills with Intelligent Steelmaking Solutions