http://precedings.nature.com/users/8763f328f7cb3c441cb673e7ac9ad150/ Documents posted by sekhar dmr Nature Publishing Group en Nature Precedings http://precedings.nature.com/images/header_logo.gif http://precedings.nature.com http://dx.doi.org/10.1038/npre.2009.2770.1 ABSTRACT: Low grade phosphate ore of Jhamarkotra that analyzes 16.5% P2O5 is upgraded to 34% P2O5 by a two stage flotation process after size reducing the ore to 90% passing through 200mesh using conventional equipment such as jaw and cone crushers followed by ball mills. Re-engineering the flotation circuit reduced the power consumption from 55 kWh per metric ton of ore treated to 50 kWh. Incorporation of roller press in the grinding circuit resulted into further reduction of power consumption to 32 kWh per metric ton of ore treated. http://dx.doi.org/10.1038/npre.2009.2770.1 Thu, 15 Jan 2009 15:09:18 UTC Jhamarkotra phosphate ore processing plant doi:10.1038/npre.2009.2770.1 2009-01-15 Sekhar Dmr Nature Precedings 2009-01-15T15:09:18Z Manuscript Earth & Environment http://creativecommons.org/licenses/by/3.0/ http://dx.doi.org/10.1038/npre.2008.2411.1 Certain types of rock phosphates of sedimentary origin are applied to acidic soils as fertilizer directly. Recent research in India showed that high grade rock phosphate in fine size when used as a mix with organic manure works as efficiently as di-ammonium phosphate (DAP) in alkaline soils. The rock phosphate from Jhamarkotra, India (sedimentary origin), Egypt (sedimentary origin) and South Africa (volcanic origin) showed good agronomic efficiency when used as Phosphate Rich Organic Manure (PROM). Further PROM shows equal residual effect. The results of efficiency of PROM made using two grades (+ 24% P2O5 and 34% P2O5) of rock phosphate mineral from Jordan show that low grade rock phosphate slimes are as effective as high grade phosphate concentrate when used in PROM. Also PROM is very effective even in the saline soils where DAP completely fails. http://dx.doi.org/10.1038/npre.2008.2411.1 Tue, 21 Oct 2008 15:23:44 UTC Phosphate rich organic manure as fertiliser doi:10.1038/npre.2008.2411.1 2008-10-21 DMR Sekhar Nature Precedings 2008-10-21T15:23:44Z Manuscript Chemistry http://creativecommons.org/licenses/by/3.0/