ajohnston
New Member
Transmin Metallurgical Consultants
Posts: 24
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Post by ajohnston on Feb 24, 2006 21:04:42 GMT
I've had too many misadventures with dye for an extractive metallurgist.
Once during a retention time audit we found that the dye we were using was organic, so it floated right out of the first flotation cell (some smelter somewhere would have been wondering what happened).
Now I'm trying to determine the optimum crush for a heap leach and the food colouring I'm using does not stain the rocks. I was hoping to see where and how fast the solution penetrates the rocks, but the dye is not working. Does anyone have any success stories?
(We're doing regular tests, but I'd love to see how the solution penetrates the rock for a shrinking core model to compare with the usual empirical approach.)
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Post by Alan Bax on Feb 28, 2006 0:23:44 GMT
An alternative method could be to weigh the drained leach column at regular intervals. Then calculate the moisture content and plot this against time.
A comparison of plots at varying crush sizes will show the difference in the rate and extent of saturation.
This should provide the information required in conjunction with the calculated metal recovery curves.
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