Refractory (in gold recovery terms, not as a general definition) means basically that cyanide cant dissolve the gold grains because they are tied up chemically or covered over by sulphides (sometimes enclosed in stable oxides like haematite). Roasting or some other form of oxidation such as bacterial oxidation, autoclave, Ultra Fine Grinding with Oxygen treatment, etc... opens up the pores so to speak and lets the cyanide in. I'm no metallurgist but I think if you get less than about 80% recovery by cyanide you're in refractory territory.
Refractory (in gold recovery terms, not as a general definition)...
Add DEG (ASX) to my watchlist
 (20min delay)
|
|||||
|
Last
$1.15 |
Change
-0.015(1.29%) |
Mkt cap ! $2.750B | |||
| Open | High | Low | Value | Volume |
| $1.16 | $1.16 | $1.14 | $1.117M | 973.6K |
Buyers (Bids)
| No. | Vol. | Price($) |
|---|---|---|
| 31 | 118378 | $1.15 |
Sellers (Offers)
| Price($) | Vol. | No. |
|---|---|---|
| $1.15 | 201453 | 35 |
View Market Depth
| Last trade - 11.27am 10/07/2024 (20 minute delay) ? |
| DEG (ASX) Chart |