How Air’s Oxygen Makes Gold to Dissolve in Cyanide
We have another substance at hand with a great tendency to form negative ions. This is the oxygen of the air. In the presence of water, the molecule of oxygen, O2, tends to assume the ionic state, combining with water to form four negatively electrified ions, thus: O2 (±) + 2H2O (±) = 4 (OH) […]
Metal’s Electrochemistry of Cyanide Solutions
The practice of the cyanide-process of gold-extraction has brought to light many important contradictions of familiar chemical analogies, which still obscure both the theory and the practice of the art with distinctions subtler and more difficult to make or follow than those which delighted the heart of the old-time metaphysician. Yet Nature herself has drawn […]
Relative Affinity of Metals for Cyanide
In looking about for some means of determining the relative affinities of the metals for cyanide solutions, I long ago came to the conclusion that the determination of the relative electromotive forces of the metals in solutions of different strengths was the simplest, readiest, and most certain that could be selected. For, properly considered, it […]
Determination Method of Gold & Silver in Copper
The extreme difficulty of obtaining a short and, at the same time, exact method for the determination of gold and silver in copper materials has been well illustrated in “Assays of Copper and Copper-Matte,” and its discussion, by Dr. A. R. Ledoux and other leading authorities on this subject. Two general methods were used by the […]
Alluvial Mining Methods
As it is my opinion that deep alluvial mining methods in Victoria and in the Murray Flats in New South Wales are practically in their infancy, and considering that we, the old school, of alluvial miners, who have thirty or forty years’ experience to guide us, must in the natural order of things hand over the management […]
Analysis of Chloridized Ore Assay
The following paper deals with a method for the “Approximate Analysis ” of Chloridized Ores, which are free from arsenic, antimony and lime. When these are present the analysis is rendered far more complicated, and many of the methods which I am about to describe could not be applied. Sufficient scope is therefore offered for […]
Chrome Recovery by Gravity Concentrators
Precious Metals Melting System
125kw Inductotherm VIP-I Precious Metals Melting System: The furnace was only used for proof of concept in a platinum recovery project and has extremely low hours. It is practically new… It is a top of the line, USA built, VIP- I Inductotherm system using their latest IBGT technology and was specifically designed to handle non-ferrous metals (gold, platinum, […]
Measure the Density of Rock: Prospector Tool
The determination of specific gravity dates from such antiquity, and the various published methods of determining it are so numerous, that one may well be skeptical as to the value of a new means of obtaining so well-known a quantity. I make no claim to any great novelty for the little device here described, the […]
Effective Hardness & Abrasive Efficiency of Corundum
The Relation Between the “ Effective Hardness ” of Corundum and its Content of Water: A specimen of corundum from Acworth, Ga., which was reputed to be of markedly inferior quality for the manufacture of corundum-wheels, was received by the Geological Survey of Georgia, with the request that it be analyzed, in order to ascertain whether this inferiority was associated […]