Dividing the Mercury from the Gold
The mercury retort is collected of a steel pot and a steel lid which is machined to fit strongly. Never attempt to refine mercury in a glass retort. A metal channel extends out of the retort lid ,bends ,and reach down at an angle .This pipe is water jacketed ,and at the end of the pipe continues into a container of water. Chilly water is run through the water jacket ,entering at the minor end and releasing at the upper end.
The tube, with the water fresh it serves as a chilly chamber .It is inside this tube that the hot mercury vapor concentrate, or is refrigerated back into liquid mercury. The retort is set up below a cover, which has a drain fan to take away any stray fumes should a leak happen.
Again take no risks while using mercury. It is risky material. The mix key is placed in the retort pot. Press down the lid, and launch water through the water jacket. Heat the retort. When the heat inside the pot reaches about 675 degrees Fahrenheit, the mercury start to vaporize. This vapor moves into the conduit, and there at once begins to cold. Bay the time it access the lower end of the pipe it has chilled satisfactorily to become a liquid again, and runs out into the container of water. To guarantee that all the mercury is transport from the button it is wise to warmth the retort pot to about 1100 degrees Fahrenheit. Turn off the heat after no more mercury can be seen soaked from the end of the pipe. Let the pot to chill. After the retort pot has chilled, open it and take the gold. The gold will be stuck jointly and have crooked holes and pock marks over it. Since of this skin it is named “sponge button”. The refine mercury should be stored in a safe container of course, to be used again another time. The final step is to dissolve the gold in a sponge button and transfer in to a mold. A boiler that will reach at least 2000 degrees Fahrenheit is used to melt the gold. The boiler should have a hood over it, so that if a small quantity of mercury is leftover in the sponge button, the vapors will be carefully exhausted by the fan in the hood.
The sponge button is located in a crucible and cover with a couple of teaspoon of flux. The flux is borax glass or a combination of borax glass and soda ash. Flux operates as a cover over the gold as it dissolves and makes the letting easier faster. If possible, the crucible should be graphite. A fire clay crucible can be used, but the graphite crucible is far less likely to break and be used many times. The fire clay crucible is consumed by the dissolve metal and may crack or break. It should not be used more than once twice.
The crucible is placed in the heater, and left there until it is sure that all of the gold in it has melted. The crucible then is separate from the heater with long tongs and transfer into a gold mold .These molds are made of cast iron and have a amount of pointed shaped holes in them .When the contents of the crucible are transfer into one of these holes, the heavier gold goes to the base, the lighter flux, which is also dissolve now, covers the top of the gold. Once the gold has freeze the mold is turner over and the gold and flux drop away from the gold .If any flux was left stuck to the gold it can be simply separate in hot, soapy water. The final result is a cone shaped gold button.