Refractory Gold Any ore that is not readily amenable to recovery by conventional cyanide leaching at a reasonable grind size can be considered refractory. The three primary factors that cause gold ores to be refractory are: Physical encapsulation Extremely fine particles are locked within an impervious, unreactive mineral.
Gold recovery tips: Screening off larger worthless gravel and rocks with a sieve is a fast and efficient way to improve your panning and sluicing results. Classifying your material to the proper dimension is also essential to any successful fine gold recovery operation.
CONCENTRATION OF PLACER GOLD ORE The recovery of placer gold involves processing similar to the processing of most ores. First, the valuable material is sepa rated from the valueless waste through concentration. The fi nal concentrate, usually obtained by repeated processing, is smelted or otherwise refined into the final product. This report
In the past, carpet, corduroy, burlap and denim were all employed to line sluices to aid in the recovery of gold. Long strnad Astro Turf carpet, screens and rubber mats are employed today for the same purpose. In Russia, some dredges use sluices with continuously moving rubber matting for fine gold recovery.