Looking to the scarce rock phosphate resources in India, RSMML has put continuous effort for utilization of its low grade ore resources, which are abundant at Jhamarkotra but require beneficiation before its utilization by fertiliser industries as raw material. Intensive research was carried out for ten years and a breakthrough in processing technology was achieved when this LGO was enriched to produce a very high-grade concentrate (+34%P2O5), rated as equal to or better than any naturally occurring ore. From reserves conservation point of view RSMML has put up a beneficiation plant for processing of 9.0 Lacs MT of low-grade ore per annum. The company has put a major thrust on the R&D activities in the recent past and several new R&D projects have been taken up.

Recently, the crushing methodology for Low grade Ore has been modified by installing horizontal shaft impact crusher, reducing the three stage Low-grade crushing process to two stages. This optimisation has increased operation hours of crushing plant and reduced maintenance requirement. Crushing & Grinding of LGO to 74 micron size Double stage Froth Flotation Process
First Stage

• Bulk Flotation
• Silica Removal as underflow
• Phosphates & Carbonates removal as froth under natural pH conditions.

• Carbonate Removal as froth
• Phosphate concentrates as underflow under acidic pH
• Cleaning of concentrate.