Leaching uranium from low grade ore - by rapid heating and oxidative pressure leaching of turbulent ore slurry

In the leaching of uranium from low grade ores by forming a sulphuric acid-contg. slurry into which oxygen is passed, the oxygen is at at least 30 bar overpressure and the suspension contains 600-1100 g/l solids so that a suspension turbulence with a Reynolds number of over 50000 is obtd. The suspen...

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Hauptverfasser:	KAEMPF,FRITZ,DR, FISCHER,PETER,DR, WINKHAUS,GUENTER,DR, THOME,ROLAND,DR, TUERKE,WOLFGANG, WARGALLA,GERHARD, BINGS,HUBERT, PIETSCH,HARTMUT,DR
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Zusammenfassung:	In the leaching of uranium from low grade ores by forming a sulphuric acid-contg. slurry into which oxygen is passed, the oxygen is at at least 30 bar overpressure and the suspension contains 600-1100 g/l solids so that a suspension turbulence with a Reynolds number of over 50000 is obtd. The suspension is heated up to 140-220 deg.C in max. 20 mins. and allowed to react for max. 15 mins. The process gives a high extraction rate (90-96%), requires only a short reaction time and produces an uranium soln. free of impurities.