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Gold/Mining/Energy : Gold Price Monitor
GDXJ 92.99+2.9%Nov 7 4:00 PM EST
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To: IngotWeTrust who wrote (52844)5/19/2000 1:36:00 PM
From: richard badauskas  Read Replies (2) of 116753
 
There are actually three different technologies employed here.
(1) Non-cyanide gold recovery process. This process uses sodium thiosulfate and salts in a patented process to Geo2. It produces a fertilizer by-product and allows the depleted dumps to be re-used to grow grain so is very environmentally friendly. The Chinese trials are being done in an area where the population draws on fish as a food source so the authorities are paranoid about fish kills and environmental contamination. From the photos at aircommunications.net you will see fields of maize growing right next to and around the Lian mineworkings. The trials so far have concentrated on very high grade (very small) oxide gold deposits. These heap leach trials have resulted in recoveries INXS of 60% gold recovery. The high grade gold allows Geo2 to get a better fix on the % of gold recovery. The first field trial needed large quantities of leachate but towards the end of that trial "tweaking" allowed the quantity of leachate to be reduced. The second set of trials this year will attempt to reduce the amount of leachate and I assume work on a lower gold grade. Ultimately it is hoped that very low grade gold will be able to be treated by this method.

(2) Enviroclean is a technology that "mines" toxic metals from polluted soils. The process leaches the metal into solution and then uses a new type of electrowinning technology to recover the pure metal. The first target metal is lead because so many places (especially in the US) are polluted.

(3) The third and distinct technology is known as "demetalizing" technology which will be employed by Geo2 in a US JV with METSS to recover metals from computer circuit boards (as well as the plastics using another technology). The US JV is known as GeoTech which also has a technology that can recover metals from other high tech products, understand that two very major US corporations are in discussions to use this technology to "recycle" their product. An announcement is expected shortly on a contract. Sales generated by the US JV with METSS on these processes could become very substantial if accepted by the marketplace. For more go to the SI thread at Message 13740026 there is also a second thread for Geo2 on the refining and mining of gold as well as a website at aircommunications.net and geo2.com.au
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