Pre-melted synthetic refining slag with optimized CaO-Al2O3-SiO2-CaF2 chemistry for high-efficiency desulfurization, dephosphorization, and inclusion absorption in ladle metallurgy. Engineered for rapid slag formation and consistent refining performance.
Pre-melted refined slag represents a fundamental improvement in ladle metallurgy practice, eliminating the time-consuming and inconsistent process of forming synthetic slag from individual raw materials (lime, alumina, fluorspar) in the ladle furnace. Our refined slag is manufactured by melting precisely proportioned raw materials in a dedicated furnace, homogenizing the melt, and solidifying it into a glassy or crystalline product that dissolves rapidly in molten steel—typically within 2–3 minutes of addition, compared to the 10–15 minutes required for raw material mixtures. This rapid dissolution means the refining slag is fully functional at the start of the ladle furnace treatment, maximizing the effective refining time available for desulfurization and inclusion removal.
The CaO-Al2O3 system at the heart of our refined slag formulation is optimized for maximum sulfide capacity, which is the thermodynamic measure of a slag’s ability to absorb sulfur from the steel. At the target composition of 45–55% CaO and 30–40% Al2O3, the slag operates in the 12CaO·7Al2O3 (mayenite) phase region, which offers the highest sulfide capacity among the calcium aluminate phases. This translates to practical desulfurization capability of 60–80% sulfur removal in a single ladle furnace treatment, enabling the production of ultra-low-sulfur steel grades with sulfur contents below 0.005%—a requirement for API 5L X70 and X80 line pipe steels used in sour gas service.
The inclusion of 5–10% CaF2 in the formulation serves to reduce slag viscosity and melting point, enhancing mass transfer between the steel and slag phases without the excessive fluorine emissions associated with higher CaF2 slags. Environmental regulations in many jurisdictions increasingly restrict fluorine-containing slag practices, and our refined slag’s moderate CaF2 content achieves the necessary fluidity enhancement while remaining within acceptable emission limits. The pre-melted manufacturing process also locks the fluorine into a stable calcium aluminate matrix, further reducing the tendency for fluorine volatilization compared to mechanical mixtures of fluorspar with lime and alumina.
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Thermal insulating covering agent designed to form a protective layer over molten steel in ladles and tundishes. Prevents heat loss, atmospheric re-oxidation, and nitrogen pickup while absorbing floating inclusions from the steel surface.
Engineered multi-component deoxidizer combining active aluminum and silicon in optimized proportions for comprehensive steel deoxidation. Provides synergistic deoxidation performance exceeding single-element deoxidizers for improved steel cleanliness.
Premium-grade quartz sand with SiO2 content of 99%+, providing high-purity silica for steelmaking slag formation, foundry molding, and refractory applications. Precisely graded for consistent performance in metallurgical processes.