MUMBAI, India, Aug. 10 -- Intellectual Property India has published a patent application (202631068046 A) filed by Raj Calciners Private Limited on May 30, 2026, for Integrated Process And Apparatus For The Production Of Calcined Mineral Products And Porous Carbon Material.
Inventors include Biyani, Rajeev; Biyani, Dheeraj; and Samanta, Aniruddha.
The application for the patent was published on July 31, 2026, under issue no. 31/2026.
Abstract: ABSTRACT Integrated Process and Apparatus for the Production of Calcined Mineral Products and Porous Carbon Material Described herein an integrated process and apparatus for the simultaneous production of calcined mineral products and a porous, low-sulphur carbon material, the process comprising: charging a mixed feed of mineral stones and raw petroleum coke (RPC) into a vertical shaft kiln; subjecting the mixed feed to a controlled temperature of 800°C to 1200°C in a high-temperature calcination zone of the kiln; injecting a regulated mixture of air or oxygen (O2), carbon dioxide (CO2), and steam through a rotating grate at the base of the kiln to establish a sub-stoichiometric, reducing atmosphere; utilizing the in-situ calorific value of the RPC as the primary fuel source to supply heat for the endothermic calcination of the mineral stones; promoting a water–gas reaction via steam injection to convert sulfur in the RPC into gaseous hydrogen sulfide (H2S); and discharging a combined product comprising calcined mineral lumps and a porous, low-sulfur carbon product. Figure 1 & 2
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