RVR (ASX) Ann: Red River increases Hillgrove gold resource to 692,000oz

Originally posted by 043110: ↑

you just need to look at the historic gold recoveries at Hillgrove - 35%-50% on refractory and even lower on antimony. http://www.redriverresources.com.au/operations/hillgrove/hillgrove.html

these are very low recoveries, but not unusual for refractory ore.

why are they so low? Because there's no single process recovery for these ores. Sometimes it takes roasting or bio-oxidation, sometimes autoclave is required. How do you know if the roasting is useful or harmful to the refractory gold, or bio oxidation helpful? Or maybe the autoclave is better? You don't know until you test it, and therefore many tests are required and $$$$ spent until the exact flowsheet is designed.

It is necessary to answer these metallurgy questions, and I haphazard a guess that neither strait resources nor bracken resources cracked the code despite spending hundreds of millions. Why did Emu NL pull out of the deal back in 2012?

If processing refractory gold was that simple, then there will be one universal and simple flowsheet with high recovery.

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Great attempt at trying to down ramp I'm sure a few weak hands have read this and probably sold. If you did some basic research and read the announcement at the top of this thread you'll find the company estimates a 91% gold and 86% antimony are achievable from syndicate, blacklode and sunlight mineral resources from metallurgical test conducted in 2016-17 as well as previous mill production and sales. The company's also said its targeting 30-50koz aueq pa once hillgrove is up and running which even at a high asic would still contribute greatly to rvrs group ebitda and make a further case for how undervalued it is ebitda/market cap

The head of hillgroves operations was general manager at lihir gold mine for two years I'm sure he and the RVR team know what is economical and what isn't and if they saw potential in hillgrove at 1200usd an oz when they acquired it what's it look like now at 1850-900??

Please all investors that either hold or are looking to hold or looking to sell do your own research and don't listen to people on hotcopper that have an agenda of their own.

gltah imo dyor