Gold has long been valued by people as a precious and noble metal. In nature, it is quite rare and mostly lies deep in the ground, so it is very difficult to get it. In modern conditions, it is mined in various ways on an industrial and small scale.
Instructions
Step 1
In the development of ore deposits, gold is mined from gold-bearing rock. Most of the world's gold is produced by this method. It is used when gold is in a solid mass, and not in small particles. Hard rock gold mining involves open pit mining where it is extracted to the surface. This method also includes underground mining using mines. This is how they find veins of gold that lie deep in the earth.
Step 2
Gold is obtained from water by dredging. At the same time, dredges are used - machines that pump out water and sediment from the bottom of the reservoir into a container on the surface. The gold in the resulting material is then separated using chemical and mechanical means.
Step 3
Gold from alluvial deposits is mined by flushing. Gold-containing material with water is poured into a special device called a flushing sluice. This mechanism is a long open-top tray with a series of ridges and grooves along the bottom. Gold particles settle in depressions at the bottom, which protect them from being washed off with water.
Step 4
For the extraction of gold sand, a special washing tray is used. Trays are usually round or rectangular in shape, plastic or metal, sometimes with projections on the inside. Gold-bearing sand and gravel are poured into a tray, water is added to completely cover the gold-bearing substance. The tray is scrolled and shaken, while the gold settles to the bottom. Since gold is heavier than water and sand, it separates from lighter materials.
Step 5
They also find gold with a metal detector. The device reacts to the metal contained in the ground and gives a signal. An ordinary metal detector finds different types of metal, but some specialists use professional devices that are tuned only to find gold.
