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Removal of phosphorous through roasting of oolitic iron ore with alkaline earth additives
Ionkov, Krassimir; Gaydardzhiev, Stoyan; Bastin, David et al.
2012In Proceedings of the XXVI International Mineral Processing Congress
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Keywords :
iron ore; dephosphorisation; roasting
Abstract :
[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.
Disciplines :
Geological, petroleum & mining engineering
Author, co-author :
Ionkov, Krassimir ;  Université de Liège - ULiège > Département Argenco : Secteur GeMMe > Traitement et recyclage des matières minérales
Gaydardzhiev, Stoyan  ;  Université de Liège - ULiège > Département Argenco : Secteur GeMMe > Traitement et recyclage des matières minérales
Bastin, David ;  Université de Liège - ULiège > Département Argenco : Secteur GeMMe > Génie minéral et recyclage
de Araujo, Armando Correa
Lacoste, Marine
Language :
English
Title :
Removal of phosphorous through roasting of oolitic iron ore with alkaline earth additives
Publication date :
September 2012
Event name :
XXVI International Mineral Processing Congress
Event organizer :
Indian Institute of Minerals Engineers
Event place :
New Delhi, India
Event date :
24-28 septembre 2012
Audience :
International
Main work title :
Proceedings of the XXVI International Mineral Processing Congress
ISBN/EAN :
81-901714-3-7
Pages :
2194-2205
Peer reviewed :
Peer reviewed
Available on ORBi :
since 13 November 2012

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