MUMBAI, India, May 29 -- Intellectual Property India has published a patent application (202531042748 A) filed by Raj Calciners Private Limited, Kolkata, West Bengal, on May 2, 2025, for 'a carbon-neutral process for producing fused alumina, mullite and ferroalloys.'
Inventor(s) include Rajeev Biyani.
The application for the patent was published on May 29, under issue no. 22/2026.
According to the abstract released by the Intellectual Property India: "This invention provides an integrated carbon-neutral process and system for producing fused alumina, fused mullite and ferroalloys using pre-heated bauxite or alumina-bearing material homogenized with shredded, atomized or turning-boring aluminium scrap as the sole or primary reducing agent. The mixture is charged into a specially designed tilting electric arc furnace equipped with dual tapping ports, bottom purging nozzles and roof-mounted graphite electrodes, enabling simultaneous separation of oxide and metallic phases while reducing external power demand and electrode wear through exothermic aluminothermic reactions. Surplus aluminium scrap can be deliberately exposed to controlled oxygen within the furnace to form high-purity white fused alumina. The tapped oxide phase is cast on a vibratory platform to eliminate porosity and refine crystal structure, while the metallic phase undergoes ladle refining to predetermined composition. The process yields dense, high-hardness fused alumina or mullite and ferroalloys such as ferro-silicon, ferro-titanium and ferro-silico-titanium, ensuring product quality, circular economy integration and industrial scalability."
Disclaimer: Curated by HT Syndication.
