MUMBAI, India, Jan. 23 -- Intellectual Property India has published a patent application (202511126319 A) filed by Raghav Productivity Solutions Private Limited, Jaipur, Rajasthan, on Dec. 13, 2025, for 'closed-loop ball mill with air separator.'
Inventor(s) include Sanjay Kabra.
The application for the patent was published on Jan. 23, under issue no. 04/2026.
According to the abstract released by the Intellectual Property India: "Closed-Loop Ball Mill with Air Separator The present invention discloses a closed-loop ultrafine grinding and fines-management system for processing silica-bearing aggregates such as quartz and quartzite, designed to produce a consistent 150-200 mesh ultrafine silica fraction for ramming mass and other refractory applications. The system comprises a ball mill uniquely configured to accept variable-size inputs from multiple upstream fraction silos, where undefined crusher outputs are filled into respective silos, with excess material automatically directed to the mill for clog-free, seamless production; the mill is fitted with alumina grinding media and lined with high alumina bricks to minimize contamination. An air separator, integrated in a closed circuit, classifies mill discharge, allowing only fines 150 mesh to pass to storage within the targeted 150-200 mesh range, with approximately 18-27% of these fines required per batch, while recirculating oversize particles. Dual 200 cubic meters moisture-protected fines silos, equipped with lined and sealed outlets, store the qualified fines, preventing intermixing and ensuring purity. A conveyorized recirculation path and PLC-controlled weighing system enable automatic material handling and precise dosing to intensive mixers. The method involves selectively feeding coarse fractions, milling with high-alumina media, air-classifying to retain 150-200 mesh fines, recirculating rejects, storing in dedicated silos, and metering fines at 18-27 wt% for batching. This scalable, efficient system reduces waste, enhances safety, and delivers reproducible, high-quality ultrafine silica products."
Disclaimer: Curated by HT Syndication.
