C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 34/12 (2006.01) C01G 23/00 (2006.01) C22B 1/02 (2006.01) C22B 3/04 (2006.01)
Patent
CA 2248975
The present invention relates to a process for concentrating highly impure titanium ore, such as anatase, with the main purpose of obtaining a final concentrate having a chemical composition similar to that of ilmenite. The process is based on the use of the following sequence of operations for the beneficiation of titanium ores: disintegration, screening, crushing, classification, low intensity magnetic separation, attrition and slimes removal, calcinations in the presence of sodium carbonate (Na2CO3) and/or potassium carbonate (K2CO3), comminution of the calcinations to a partied size below 1 mm, leaching in alkaline medium (pH in excess of 10) followed by acid leaching, The final concentrate, which is rich in titanium and iron and has a low content of impurities, is the intermediate raw material for the process of producing titanium slag.
de Matos Marcelo
de Moreira Horta Ronaldo
Freitas Lino Rodrigues de
Companhia Vale Do Rio Doce
Robic
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