GOLD - Chemical and Mechanical Recovery - A guide for the small operator
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With the resurgence of the gold price to over US$720/troy ounce in May 2006, its highest level in 25 years, the precious metal seems set to make a return as the financial and trading commodity of choice. This revival has resulted in a scramble to capitalise on the current high returns and many previously unviable and marginal gold deposits; both insitu and secondary (including slimes/tailings dumps) will be reassessed world-wide for their economic viability by both large-scale and small-scale operators alike.

What is is an information site that provides a condensed working guide on the mechanical and chemical recovery of gold from primary and secondary deposits. The information offered has invaluable detail on step-by-step procedures and exact specifications on gold extraction methods that can be practically utilised, especially by the novice small operator.

What am I paying for?

You will receive over 140 A4 pages of essential information, which represents the culmination of 15 years experience and ongoing interest in the gold mining and extractive metallurgical industries. It has been put together with both the established and novice small operator in mind. Some of the information supplied is devoted to methodologies that recover coarse, free gold, which, along with some of the flower gold in certain placer (alluvial) deposits, ordinarily are mechanically recoverable by utilising natural and induced gravity concentration methods (centrifuges, cyclones, shaking tables, jigs, hydro-active riffled sluices, etc.) and/or plate amalgamation. Mechanical recovery systems, with few exceptions (e.g. in-line pressure jigs developed by Gekko Systems of Australia), can often be ineffectual in the recovery of the remaining flower gold and micro-fine gold, which may constitute over 30 percent of the total gold content (specifically in some placer deposits) and usually is lost with the tailings. Thus, the remainder of the information contained herein is dedicated to the recovery of this flower gold by means other than by mechanical recovery. Gold extraction through the use of cyanide, a chemical reagent particularly suited to the isolation of fine gold, is still widely in use throughout the world, and the cyanidation method has found favour in the processing of low-tenor sands and slimes/tailing dumps (a 'niche market' that tends to favour the small operator), and other deposits hosting fine particulate gold. It should be noted that gold isolation by solvent extraction methods is one of the most difficult aspects of ore beneficiation, and this latter process is dealt with at some length in this information site.

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