Here is a method on how to conduct a cyanidation bottle roll test AKA Cyanide Gold Extraction Process: Riffle out 400 grams of the ore. Grind to pass 200 microns grind at 35% solids. Wet screen. Retain and dry fractions. Settling overnight of 45um will be required. Decant and dry. Perform cyclosiing on 45um fraction ...
When used, CNFREE sodium cyanide substitute gold extraction reagent must be stirred with normal temperature alkaline water and then dissolved in the slurry for gold leaching. In the CIP production process of oxidized gold ore, heap leaching and pool leaching, CNFREE sodium cyanide substitute is used in the same manner as sodium cyanide.
The mineral components such as antimony, arsenic, copper and sulfur which affect gold cyanidation process are not sensitive to thiourea gold recovery method. This cyanide free gold recovery method is suitable for extracting gold from gold containing raw ores that are difficult to process by cyanidation.
Cyanide Process Cyanide process is also called as Macarthur forest Process. It is the process of extracting gold or silver from the ores by dissolving in a dilute solution of potassium cyanide or sodium cyanide. This process was introduced in the year 1887 by the Scottish chemists naming Robert W. Forrest, John S. MacArthur, and William Forrest.
The conventional cyanidation gold extraction process is divided into two types according to the treatment materials: one is a cyanide plant that processes flotation gold concentrate or treats amalgam and re selects tailings. The other is to treat muddy oxidized ore, using a full mud mixing cyanide gold extraction process plant.
Heap leaching: In the open, cyanide solution is sprayed over huge heaps of crushed ore spread atop giant collection pads. The cyanide dissolves the gold from the ore into the solution as it trickles through the heap. The pad collects the now metal impregnated solution which is stripped of gold and resprayed on the heap until the ore is depleted.
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 20 percent is pyrrhotite and 0.3 to 0.7% ...