Gold Refining4429431

Gold refining can enhance the purity of gold, and the customary approach to gold refining including flotation, cyanidation, and the carbon-in-pulp. They can be used alone or in combination with one another. [http://metalrefinery.com precious metal refinery] This is a process the gold goes through during the refining stage. 

Flotation consists of a frothing agent (which will cause the water to foam), an accumulating agent (which bonds onto the gold) will form a greasy coating which sticks to air bubbles then a mixture of organic chemicals maintain the other contaminants from also bonding to the air bubbles is added. The solution is then casts off aerated-air bubbles that are blown in and the gold attaches to the air bubbles. The bubbles float to the top    and the gold is skimmed off. 

Cyanidation also entails using chemicals to separate the gold from its contaminants. In this procedure the ground ore is placed in a tank containing a weak solution of cyanide. Next, zinc is added to the tank, creating a chemical reaction by which the outcome will be the precipitation (separation) of the gold from its ore. The gold precipitate is then separated from the cyanide solution in a filter press. A similar process is amalgamation, [http://metalrefinery.com silver refinery] which uses an identical process with different chemicals.
Initially a solution carries the ground ore over plates covered with mercury. And the mercury attracts the gold, creating an alloy known as an amalgam. The amalgam is then heated, causing the mercury to boil off as a gas and leaving behind the gold. The mercury is collected, recycled and used for a second time in exactly the same process.

The carbon-in-pulp technique also uses cyanide, but utilizes carbon as an alternative to zinc to precipitate the gold. The 1st step is to combine the ground ore with water to create a pulp. After that cyanide is added to dissolve the gold, after which carbon is added to bond with the gold. Once the carbon particles are removed from the pulp, they are placed in a hot caustic (corrosive) carbon solution, which separates the gold from the carbon. 

Two other techniques of gold refining are amalgamation and smelting. In amalgamation, the gold ore is dissolved in solution and passed over mercury-covered plates to create a gold mercury amalgam. As soon as the amalgam is heated, [http://metalrefinery.com metal smelting] the mercury boils off as a gas and leaves behind the gold. In smelting, the gold is heated using a chemical substance called "flux. The flux is bonded with the contaminant and it will float on top of the gold. The flux-contaminant mixture (slag) is hauled away, leaving a gold precipitate.

We can expect scores of home gold refiners each of whom will follow some technique because they deem it is the most simple / convenient. However gold refining is not as easy as individuals make it sound. When you are refining your gold articles you must first make certain that you have adequate gold to carry out the refining process as it entails handling hazardous chemical substances.