C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
31/1, 23/324
C01B 25/01 (2006.01) C01B 25/027 (2006.01)
Patent
CA 1335752
Calcined phosphate fines, recovered from an electric phosphorus furnace, are converted into a supplementary furnace charge by mixing the fines with carbon reduc- tant, the requisite amount of silica fluxing agent and phosphoric acid binder and the mixture formed into bri- quettes which are cured by heating at sufficient temperatures to effect reaction between the acid and fines to give hardened briquettes of phosphate salts. The supplemental charge is higher in P2O5 than the main charge and thus provides increased phosphorus output.
566566
Fmc Corporation
Osler Hoskin & Harcourt Llp
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