This integrated industrial system combines hot metal desulfurization with comprehensive slag treatment in a coordinated production line. It removes sulfur impurities from molten iron using injection or mechanical stirring methods to meet stringent steel quality requirements. The system simultaneously processes the resulting desulfurization slag through cooling, crushing, and separation stages to recover valuable materials and minimize waste. This integrated approach optimizes material flow, reduces energy consumption, and improves overall steel production efficiency while ensuring environmental compliance. The system is designed for iron and steel basic production facilities, typically integrated into a steelmaking plant. It comprises refractory-lined steel vessels, high-temperature alloy components, and ceramic injection lances. Key parameters include a processing capacity of 100–300 tons per hour, desulfurization efficiency of at least 95%, agent consumption of 3–8 kg per ton of metal, operating temperature range of 1200–1500 °C, slag processing rate of 20–50 tons per hour, power consumption of 150–250 kWh per ton, operating pressure of 1.0–1.6 MPa, control accuracy of ±0.5%, material grade ASTM A516 Gr.70 for pressure vessel parts, total weight of 80–120 tons, footprint of 200–400 m², and noise level ≤85 dB(A) at 1 m (per ISO 11202). These values are reference ranges and must be verified for the specific model and application. The system operates by injecting or mechanically stirring desulfurizing agents (typically calcium-based) into the hot metal, forming sulfur-rich slag that is then separated, cooled, and processed for material recovery. For procurement, verify model-specific performance, standards compliance, and installation requirements with the legal manufacturer or supplier. The system is not a standalone product but a coordinated line; ensure compatibility with existing plant infrastructure. Maintenance signals include reduced desulfurization efficiency, increased agent consumption, or abnormal noise. Failure boundaries include operating outside specified temperature or pressure ranges, which may compromise performance. Always confirm that the equipment meets applicable local regulations and standards.
Hot metal is treated with desulfurizing agents (typically calcium-based) through injection lances or mechanical stirrers, forming sulfur-rich slag that is then separated, cooled, and processed for material recovery. The process begins with the hot metal being transferred to a treatment vessel, where the desulfurizing agent is injected or stirred in. The agent reacts with sulfur to form a slag that floats on the surface. The slag is then skimmed off and directed to a slag treatment unit, where it undergoes cooling, crushing, and separation to recover metallic iron and other valuable components. The treated metal proceeds to the next steelmaking stage. The system integrates these steps to optimize material flow and energy use.
