Calculate Ore Tonnage and Grade from Drill hole Samples
The usual method of sampling mineral deposits is to drill holes and assay the sludge or core. Though the results thus obtained may not represent the true average value of the deposit, it is on these results that estimates of practically all large orebodies are made. In a large number of cases, the results of […]
Crushing Mineral Processing
In mineral processing, the reduction of minerals by crushing and grinding may be regarded as having one or other of two main objectives: the attainment of a size appropriate for the direct industrial application of the mineral, e.g. barytes, sand, aggregate; or the release of metallic or ore inclusions from an unwanted matrix with a […]
Blake Jaw Crusher
In the history of crushers, both chronologically, and by virtue of its standing in the field of heavy-duty crushing, the Blake jaw crusher stands first in the list. All of the large, heavy-duty primary crushers of the jaw type are built around the Blake principle which, for simplicity and brute strength, is unsurpassed by any […]
Manual & Hand Operated Rock Crusher
HOW TO SETUP AND USE THE HAND OPERATED ROCK CRUSHER: The rock crusher is shipped with the handle screwed to the inside of the flywheel. This must be reversed. In the case of the double flywheel version there are two handles. The handle has two flats to accept a 24mm spanner right against the flywheel. Use […]
Gold Milling Process -Primitive and Basic
Here is an Ancient Gold Ore Milling Process used in China in the 1800s. We might use it again after WW3. At the time, 1890, the Author said “There is, of course, nothing for us to learn from this imperfect and rudimentary gold-extraction process described here, which is doubtless destined to disappear ere long, before the […]
Preparation of Pure Mercury
In the Estimation of Gold and Silver in Mercury and Amalgam, and the Preparation of Pure Mercury one can judge these subjects are so intimately connected that they are best treated together. It is a common delusion that only a negligible amount of gold or silver passes with the mercury through leather or cloth used […]
Standard Amalgamation Test
A satisfactory laboratory method for the amalgamation test must secure the following conditions: The individual attention necessary in the separation of mercury must be reduced to a minimum, and the entire manipulation must be as simple as possible. To this end a mechanical agitator must be used, and preferably one which allows of the bottles […]
Free Gold Content by Amalgamation Assay Test
The amalgamation assay consists in subjecting a weighed sample of ore to the action of mercury, and separating the latter after the gold is presumed to have become amalgamated. Preferably the original ore or “heads,” the “tails” after amalgamation, and the mercury which has been separated, are all three assayed, as the results then check […]
Gold Jig & Mineral Processing Jigs
The Gold Jig or Mineral Jigs are important of all types of alluvial gold concentrating device among all gravity separation methods; they are also the most complex and the practice of jigging in mineral processing is often viewed as an art rather than a science. Gold jigging has been referred to as being probably the most complex gravity operation because […]
Leach Gold using Hyposulphite of Sodium
The fact that gold will dissolve in sodium hyposulphite solutions is known from the lixiviation of silver and gold ores. The gold will dissolve only in small quantities. According to researchers, if gold leaf is treated for a time with sodium hyposulphite solutions of varying strengths,’ solution takes place in every instance, the deviation in […]