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Titanium dioxide Sands AMD (4 replies)

9 months ago
Obersturmbann 9 months ago

Does anyone have any dealings with titanium dioxide mines?

To be more specific I am looking at sand’s AMD/sulphuric acid issues.

Marshal Meru
9 months ago
Marshal Meru 9 months ago

Heavy mineral sands are usually fairly devoid of sufide minerals and therefore the potential for AMD generation is 'usually' minimal. However, if the deposit or part of the deposit has been in an anoxic environment with enough organic matter, then secondary sulfide minerals could form within the sands following deposition.

This is the kind of thing that you see in acid sulfate soils and there are examples of excavations in sand dune complexes that have resulted in acid release issues (the desalination plant near Bendigo, in Australia is a good example). I cannot think of any specific examples of this occurring in mineral sands but it is possible if conditions are right for it.

John Koenig
9 months ago
John Koenig 9 months ago

Do titanium dioxide mines not use a large quantity of sulphuric acid in their mining process? This is assuming they are going the sulfate route as opposed to the chloride process.

9 months ago
Oberfuhrer 9 months ago

Looking at the sulfate process, http://www.rsc.org/learn-chemistry/resource/download/res00001267/cmp00002617/pdf this does rely on sulfuric acid.

Carl Jenkins
9 months ago
Carl Jenkins 9 months ago

We have recently run titanium dioxide mine produced water through our process with great success. We recovered 100% of the sulphuric used and converted the remaining salts into potassium nitrate, ammonium sulfate and sodium chloride. We also removed all radioactive salts and recovered 95% of the water. I would like very much to speak to someone who has experience with tio2 produced water.

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