Production of synthetic rutile

Details Production of synthetic rutile Production of synthetic rutile

C - Chemistry, Metallurgy

22

B

C22B 34/12 (2006.01) C22B 3/06 (2006.01) C22B 3/08 (2006.01) C22B 5/10 (2006.01) C22B 5/12 (2006.01) C22B 9/05 (2006.01)

Patent

CA 2077441

The specification describes a process for producing synthetic rutile from a titaniferous ore or concentrate. The process involves three basic steps which are reduction, removal of iron by leaching or aeration and removal of other impurities by leaching in a solution of a strong mineral acid such as hydrochloric acid or sulphuric acid. The conditions of reduction are controlled to promote the formation of metallic iron, a major rutile phase and a minor impurity bearing phase. The minor impurity phase may be a metatitanate, an anosovite or a pseudobrookite. However, formation of a metatinatate is normally preferred. Suitable reductants include carbonaceous materials or hydrogen bearing gases such as natural gas or synthesis gas. The process is capable of removing more than 80% of each of the contained iron magnesium and manganese remaining as oxides after reduction. Substantial proportions of contained aluminium can also be removed.

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