Diving the Metal with Gravity

Since gold is the heaviest material in the sample, it can be divided from the rest of the sample by its gravity. A small concentrate can be made which will hold all of the gold, the heavy black or magnetic iron, and small amount. This concentrate will be sent to the assayer who will remove all of the gold in the concentrate. This gold is then evaluates and considered against the total weight of the sample. For example, if the sample weighed one hundred pounds and the gold that was recovered from it weighed 500 milligrams, the one ton of material would have 20 times as much gold in it, or 10.000 milligrams which is 10 grams. Since there are 31.108 grams in one troy ounce, the sample would assay a little less than a 3 of an ounce of gold per ton.

Previous of taking samples find out what size is preferred by the person who is going to concentrate them. Most concentrating gear requests a certain lowest quantity of material before it can work correctly. If the sample is too small a consistent gravity division may not be possible. On the other hand ,samples should not be larger than essential ,mostly since the larger samples cost more to process. Very large samples yield a larger quantity of concentrate. The assayer will not be able to switch large concentrates and they must consequently be determined .The more the sample is touch the more it will cost to run the sample. Soon in your sampling program large samples may be wanted, but originally they should be reserved close to the size suggested by the person who will ponder them.

A small concentrating table (2 by 4) works perfectly for concentrating placer samples. 50 to 1 hundred pounds of material put over a small table will yield a concentrating which the assayer can simply handle.