Gold Extraction

Gold & Silver Dissolution and Cyanide Concentration

By far the most important cyanides used in cyanidation are sodium cyanide and calcium cyanide. The latter product is sold in an impure form analyzing close to 50% NaCN equivalent. The former is sold in various grades from 85 to 98% NaCN. In comparing the dissolving effects of the cyanides of ammonium, sodium, potassium, magnesium, … Read more

Orogenic-Mesothermal-Greenstone Gold Deposits Exploration

How to explore or “go prospecting” for a Orogenic-Mesothermal-Greenstone Gold Deposit is described herein starting with what exploration tool can be used?   First is magnetic surveys can be very useful exploration tools, when looking for bends and structures that the potential host Greenstone/Orogenic shear hosted gold deposits and mineralization. Gravity surveys can be very … Read more

Gold Refining for Gold Extraction

Electric gold melting furnace Portable Torch Cutting Welding Vacuum filter kit with hand pump Magnetic stirrer pH and Thermometer Gas mask Chemical Protective Clothing Glove Chemical Boots Chemical goggles Digital Scale 0.001 g Hot Plate Alcohol lamp Chemical spoon Glass Stir Sticks Wash bottle distilled water Glass Baster Filtering Flask Polypropylene Buchner funnel Filter paper … Read more

Gold Electrolysis Process & Gold Recovery

  Electric gold melting furnace Portable Torch Cutting Welding     Vacuum filter kit with hand pump Magnetic stirrer       pH and Thermometer              Gas mask        Chemical Protective Clothing  Glove Chemical            Boots     Chemical goggles         … Read more

Determine Total Cyanide in Solution

The test outlined is a simple and rapid method for the determination of total cyanide in plant solutions, providing significant amounts of iron cyanides are not present. Copper, nickel, zinc, and iron cyanides build up in plant cyanide solutions as a result of the usual gold milling practice of recycling solutions . Since these metals … Read more

Arsenic and Antimony Sulphide Minerals in Cyanidation

The successful cyanidation of gold ores containing appreciable amounts of arsenic or antimony sulphide minerals such as orpiment, realgar, and stibnite is usually difficult or even impossible. Extractions are low and the solutions soon become ‘foul.’ The gold in such ores could be free and uncoated, and no trouble in dissolving it in clean cyanide … Read more

How Copper Affects Cyanidation & Leaching

Many precious metal ores contain copper minerals in various amounts. These copper minerals dissolve in cyanide solutions to a greater or lesser degree depending on the particular copper mineral or minerals present, their fineness, and the dissolving effect of the cyanide solutions. In the process of dissolution the copper combines with, or as it is … Read more

Process of Cyanide Gold Extraction

Here I present an Process EXAMPLE of Gold Extraction Cyanide in which the cyanidation feed consists of a pyrite concentrate floated after the selective flotation of a copper-gold concentrate. The pyrite concentrate is reground to 90% minus 325 mesh and aerated in a high-lime solution prior to cyanidation. It contains 99% sulphides of which 10 to … Read more

Refractory Gold Processes

Gold Concentration Pre Oxidation Albion

Gold can be leached and extracted/recovered in several ways.  Even if you gold is “refractory” in pyrite or arsenopyrite, you can still get much value from your ore/rock depending on the economics of capital and operating cost. The cheapest and fastest option is to simply grind and CIL the whole thing according the the process … Read more

Gold CIL & CIP Gold Leaching Process Explained CCD

cil

Cyanide is a lixiviant, or reagent that is used to leach, often in tanks, gold from a solid matrix and form a gold cyanide complex.  The gold cyanide complex is then extracted from the pulp or slurry by adsorption onto activated carbon. CIL stands for carbon-in-leach. This is a gold extraction process called cyanidation where … Read more