This Beginners FIRE ASSAY KIT has as equipment required to help miners with their laboratory startup. Probably the most important factor of success in prospecting and gold recovery mill operation is the number of assay completed you can do 6 assays at a time with this Kit.
At one time, fire assaying was a deep dark secret. Now in this modern world, education can be had by those who want to learn. Many miners have learned to do their own fire assays and we offer complete fire assay kits with instructions! Simply mix your ore with our Premixed Flux (non-leaded flux available for international sales-obtain & add lead locally) in a Crucible. Place it in the Furnace. In an hour, pour the entire batch into the Pouring Mold. When it has cooled, break off the lead button that has formed. Place the lead button on a Cupel and back into the Furnace. Soon any precious metals present will remain in the form of a small bead. All materials and equipment are included in this kit so that you can do your own assays and determine the weight of the bead, without other equipment.
The Advanced Fire Assay Kit offers additional equipment and supplies tothe Beginners Fire Assay Kit,including the Automatic TemperatureControl for the Furnace. TheAnalytical Balance is an easy-to-readdigital unit. An excellent laboratorysetup for any operation strivingtowards professional results. (You may substitute the #9 furnace with a larger one for the difference in theprice.)
Searching the industry looking for low cost and effective mining laboratory equipment, we are continually testing new items. Today, the necessary equipment can be purchased for a fraction of the cost of past mining laboratories. Where low cost equipment could not be found, we have manufactured the equipment ourselves.
If you are going into mining or if you are in mining, consider putting in your own lab. A small backyard facility can prevent the loss of a great deal of time and money. We always answer questions on the phone, and will help with setting up your lab. We believe that a miner without a lab is like a hospital without a MRI machine. Neither can really tell what is happening without the proper tools.
The Expert Fire Assay Kit offers additional equipment and supplies to the Beginners Fire Assay Kit (shown in photo), including the Automatic Temperature Control for the Furnace. The Analytical Balance is an easy-to-read digital unit. An excellent laboratory setup for any operation striving towards professional results.
STEP 2. If you are making your flux for standard oxide ores, add the full container of Assay Flour to the 25 lbs pail of flux. If you are not making the full pail into a standard oxide assay flux, then use a ratio of Assay Flour to the amount of flux.
STEP 1. Weigh out the Unleaded flux you are going to use for assaying or smelting. (For an assay, you are going to use a total of 90 grams of LEADED assay flux so weigh out 60 grams of flux and weigh out 30 grams of lead. Add this 90 grams of LEADED assay flux to your crucible.
Note: If you used 29.16 grams of ore material, then for each milligram your bead weighs, there is 1 ounce of precious metals in your ore. But remember at this point the bead is gold, silver and maybe platinum so you must go on to standard separation methods before you will know the exact gold, silver and platinum content.
Safety Warning: Assay fumes are poisonous. An assay furnace must not be used indoors unless under a ventilated hood. Note: Wear gloves and goggles when doing assays and smelting. Goggles or face shield must be worn at all times. Hot slag can splatter !
The Parting and Drying Dish is a necessary part of the assay. The gold bead from the cupel is placed in the dish along with nitric acid and water. Use distilled water only, 2 parts water to 1 part acid. Heat on a hot plate or over an alcohol flame. Heat long enough to permit fumes to rise from the acid. If the bead begins to bubble and react, allow the action to continue until there is more action. If the bead simply discolors after the first fumes, add enough water to cool the acid and stop any further action. Compare the color of the bead to the color chart below to determine gold content. If the bead bubbled, when the bubbling stops, pour off the diluted acid carefully and add distilled water and pour off several times. Finally drain the water off and dry over heat. The black residue left is the gold (99% pure). It will turn gold color when annealed at 1000F for 3 minutes. This gold is carefully removed from the parting dish and weighed. If the bead did not bubble and you wish amore accurate indication than the color chart, then the answer is to inquart with silver, Just add 4 times as much silver by weight as there is gold in the bead to the bead with about 10 times as much lead and re-cupel. The silver will alloy with gold and allow the nitric to dissolve the silver leaving the gold. Be sure to weigh the bead before adding the silver, then when you have weighed the gold you will know how much silver actually came out of the assay.
The Fire Assay Home Study Course only talks about gold and silver which comes with the kit. We are able to get a bead of gold and silver and part it, which is dissolving the silver into solution and weight the gold. we do get ores that have PGM present, and they will be mixed with your gold and silver. It normally changes the physical characteristics of the bead and will appear bumpy like a golf ball. It is very difficult to identify quantities when PGM are present. Most of the time that bead would need to be digested and each metal dropped separately. This is beyond the assay kit, chemical assay are now needed. We recommend send them out if you need to know the PGM quantities. 911Metallurgy [email protected]