Reference : Removal of phosphorous through roasting of oolitic iron ore with alkaline earth additives
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Geological, petroleum & mining engineering
http://hdl.handle.net/2268/133978
Removal of phosphorous through roasting of oolitic iron ore with alkaline earth additives
English
Ionkov, Krassimir mailto [Université de Liège - ULg > Département Argenco : Secteur GeMMe > Traitement et recyclage des matières minérales >]
Gaydardzhiev, Stoyan mailto [Université de Liège - ULg > Département Argenco : Secteur GeMMe > Traitement et recyclage des matières minérales >]
Bastin, David mailto [Université de Liège - ULg > Département Argenco : Secteur GeMMe > Génie minéral et recyclage >]
de Araujo, Armando Correa mailto []
Lacoste, Marine mailto []
Sep-2012
Proceedings of the XXVI International Mineral Processing Congress
2194-2205
Yes
No
International
81-901714-3-7
New Delhi
India
XXVI International Mineral Processing Congress
24-28 septembre 2012
Indian Institute of Minerals Engineers
New Delhi
India
[en] iron ore ; dephosphorisation ; roasting
[en] The present study is devoted to improvement of the leaching efficiency during phosphorous removal from high phosphorous gravity-magnetic concentrate. Before leaching the concentrate has been subjected to roasting with the addition of either Ca(OH)2 or CaO. The oolitic iron ore is roasted at 900°C for one hour. This reflects in reaction between alkaline earth additive and quartz, aluminosilicates, phosphorus, and some other minor components of the gangue minerals. The application of leaching, physical separation, and wash out of salts has resulted in the decrease of phosphorus from 0.7 to 0.15 % and it is established that the major influencing factor is the concentration of acid and to a less extent duration of the leaching process. About two third of the phosphorus can be removed by roasting with 3 % CaO to hematite, coarse grinding to d50 0.3 mm, dry high intensity magnetic separation and leaching of the magnetic fraction with hydro-chloric or nitric acid.
Researchers ; Professionals
http://hdl.handle.net/2268/133978

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