The torpedo car is the primary vessel for transporting molten iron from the blast furnace to the steelmaking shop, operating under extreme conditions—temperatures reaching 1300–1500°C, severe thermal shock during hot metal charging, continuous mechanical erosion from iron flow, and chemical corrosion from molten slag and pretreatment agents. As a leading provider of high-temperature industrial refractories, JHR Refractory has supplied quality products and system solutions to over 4,000 industrial furnaces worldwide. Our comprehensive refractory solutions for torpedo car systems are engineered to extend lining service life, minimize heat loss during transportation, and reduce maintenance costs.
1. Comprehensive Working Lining Solutions for Every Zone
The torpedo car working lining is in direct contact with molten iron and slag, with each zone facing distinct wear mechanisms. The impact zone at the bottom withstands intense mechanical shock and erosion from falling iron during charging. The slag line resists chemical attack from corrosive slags and pretreatment agents. The pool (iron line) endures continuous abrasion from high-velocity iron flow. Our Al₂O₃-SiC-C bricks are manufactured from high-quality bauxite, corundum, silicon carbide, and flake graphite as primary raw materials. These products deliver excellent thermal shock resistance, strong slag corrosion resistance, superior resistance to iron erosion, and reliable performance in high-temperature service. Available in grades for impact zone (JX-ASCC-YC65/YC70), pool (JX-ASCC-YR60/YR65), and slag line (JX-ASCC-YZ65/YZ70), with alumina content ranging from 60% to 70%. Additionally, our Al₂O₃-SiC-C castables for torpedo car applications are formulated with high-alumina, fused alumina, and silicon carbide, delivering high strength, excellent erosion resistance, and good thermal shock stability.
2. Specialized Repair and Patching Materials
Extending torpedo car lining life requires effective and efficient repair solutions. Our wet shotcreting castables are engineered for rapid inner lining repair without mould requirements. Manufactured from premium high-alumina, fused alumina, and silicon carbide, the material offers good flowability for pumpable delivery through shotcreting equipment. Available in JH-YLG60 and JH-YLG50 grades with alumina content ranging from 50% to 60%. The wet-mix process significantly reduces dust during application, improves construction efficiency, and minimizes rebound loss. Field trials have demonstrated approximately 30% increase in torpedo car service life. For hot repairs, our Al₂O₃-SiC-C castables for torpedo car lip and mouth applications deliver strong slag resistance, excellent erosion resistance, and good thermal shock stability, with minimal slag adhesion and easy cleaning.
3. Supporting Mortars and Ancillary Materials
To complete the lining system, we offer a full range of supporting refractory materials. Our Al₂O₃-SiC-C mortars are formulated with proper setting time, high bonding strength, and excellent high-temperature performance. Available in dry and wet forms to suit different construction requirements, these mortars ensure secure brick adhesion and joint integrity under thermal stress. For insulation applications, our lightweight castable and gunning mix series delivers low thermal conductivity and superior thermal insulation, effectively minimizing heat loss during hot metal transportation. These materials are widely used as back-up insulation behind working linings to reduce temperature drop and improve energy efficiency.
4. Conclusion
In today’s competitive steelmaking industry, reliable torpedo car refractory solutions are essential for achieving extended campaign life, consistent hot metal temperature control, and sustainable operations. From the impact zone and slag line to the pool and car mouth, from working lining bricks and castables to shotcreting repair materials and supporting mortars, JHR Refractory provides comprehensive, zone-specific refractory products and technical services that address the unique challenges of each torpedo car component. With a proven track record of serving major steel enterprises worldwide and a commitment to technological innovation, we deliver refractory solutions that help our customers maximize operational efficiency, reduce maintenance costs, and achieve sustainable growth.
