Process of making gold

Mining

Mining is the first method , a machine called a "hydraulic giant" uses a high pressure stream of water to knock the gold ore off of banks containing the ore and  The gold ore is then washed down into sluices or troughs that have grooves to collect the gold.

  it is deposited it vein, the gold is mixed with another mineral, often quartz, in a vein that has filled a split in the surrounding rocks. Gold is obtained from lode deposits by drilling, blasting, or shoveling the surrounding rock. . The gold ore is then gathered up and taken for refinement. Using picks and small explosives, they then remove the gold ore from the surrounding rock.
   
    The three main methods used to mine placer deposits are hydraulic mining, dredging, and power shoveling Dredging and power shoveling involve the same techniques but work with different size buckets or shovels. In dredging, buckets on a conveyor line scoop sand, gravel, and gold ore from the bottom of streams.

Grinding

After the gold ore has been mined, it usually is washed and filtered at the mine as a preliminary refinement technique. It is taken  to mills, it is first combined with water and ground into smaller chunks. after it The resulting mixture is then further ground in a ball mill a rotating cylindrical vessel that uses steel balls to pulverize the ore.







.separating the gold from ore

A chemical element, Au, atomic number 79 and atomic weight 196.967, a deep yellow, soft, and very dense metal. Gold is classed as a heavy metal and as a noble metal; commercially, it is the most familiar of the precious metals. Copper, silver, and gold are in the same group of the periodic table of elements. There are many methods to separate the gold from the ore.floatation involves the separation of gold from its ore by using certain chemicals and air. The ore is dumped into a solution that contains a frothing agent ,a collecting, and a mixture of organic. The solution is then aerated air bubbles are blown in and the gold attaches to the air bubbles. The bubbles float to the top, and the gold is skimmed off.

The ground ore is placed in a tank containing a weak solution of cyanide. zinc is added to the tank, causing a chemical at the end result is 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 method is amalgamation, which uses the same process with different chemicals. asolution carries the ground ore over plates covered with mercury. The mercury attracts the gold, forming an alloy called an amalgam. by heating the amalgam, causing the mercury to boil off as a gas and leaving behind the gold and The mercury is collected, recycled and used again in the same process.
    The carbon-in-pulp method also uses cyanide, but utilizes carbon instead of zinc to precipitate the gold. The first step is to mix the ground ore with water to form a pulp. Next, cyanide is added to dissolve the gold, and then carbon is added to bond with the gold. After the carbon particles are removed from the pulp, they are placed in a hot caustic  carbon solution, which separates the gold from the carbon.this is the way to separate the gold from the ore.