How Gold is melted

How gold is melted

Gold The name of the gold medal comes from the Sanskrit word (Jval), and its symbol (Au) is from the Latin word (Aurum), which means gold, [1] and gold (English: Gold) is a soft metal with a distinctive yellow color chemical symbol (Au) A component of the eleventh group in the periodic table, this element is chemically inert; that is, it does not react with any other element like the other minerals, although it dissolves in royal water (Aqua Regia), a mixture of acids. Nitric and hydrochloric), [2] has been used extensively in a currency instrument. [3] Gold smelting Smelting A method of extraction of minerals from ores, this method dates back to prehistoric times, and this method usually involves the reduction

of oxides in the metal ore using reduction reactions and resulting in these reactions impurities of non-metallic oxides known as slag, and the smelting process is a process How gold is melted Gold is usually not free in nature but is associated with other minerals such as silver, quartz (SiO2), calcite (CaCO3), lead, tellurium, zinc or copper. [1] The removal of these metals and impurities make [5] The gold smelting process can be summarized as follows: [6] Before starting the gold smelting process, the caliber must be determined; the 24 carat is pure gold that does not contain any other minerals as mentioned earlier but is soft. It is often not suitable for jewelry or for everyday use, while the gold of 21, 18 or 9 carat is a mixture of gold, silver, and copper because it shares gold in the flexibility and voluntarily in the formation. The gold is inserted into the melting furnace, which the fire reaches through a pipe connected with a gas bottle, and then moves to the melting pot, which is a heat-resistant vessel.

The gold is moved into the crucible using a piece of carbon. After the gold has melted, it is placed in the molds made specifically for it using a handle and left to cool. After the molten gold is cooled, the rolling process is carried out. The amount of gold in the alloy is measured using a unit called carat, one carat equals one part of 24 parts, so 18 carat gold contains 18 parts of pure gold and 6 parts of other metals, [1] and 24 carat gold. All of it is pure gold, but it is very soft, so 18- and 9-carat gold bars are usually used because they are more solid. [2] Natural abundance Gold is one of the few elements found in its natural state, and what is extracted from gold each year is estimated at 1,500 tons, The majority of this gold or the equivalent of two-thirds comes from South Africa and the rest from Russia, [2] and the deepest basin Gold in the world is the Witwatersrand Basin in South Africa, and if you have gold, there is a 50% chance that this gold comes from this basin. [7] Seawater contains gold at a concentration of about 4 grams per million tons of water. In general, this is an enormous amount of gold stored in seas and oceans, but because its concentration is too low, attempts to extract it have not succeeded. [2] Uses of Gold The most prominent uses of gold can be summarized as follows: [2] Thin wires made of gold are used inside computer chips to produce electrical circuits. Gold can be uniquely shaped as a very thin layer called gold leaf for use in art, decoration, or architectural decoration. Electroplating is used to cover metals with a very thin layer of gold.

Prosthetics, cheap jewelry and electrical connectors. Used to protect copper components in electrical circuits because it conducts electricity well and does not corrode and therefore does not interrupt the conduction of electricity. Dentists sometimes use gold ingots in dental fillings. Gold nanoparticles are increasingly used as industrial catalysts such as vinyl acetate, which is used to make PVA (glue and paint) manufactured using a gold catalyst. Gold radioisotopes (gold 198) are used to treat cancer. [1] Sodium-gold thiosulfate (AuNa3O6S4) is used as a treatment for arthritis. [1] Gold is used in the coating of space helmets with a thin layer of gold to protect astronauts' eyes from harmful solar radiation. 3] History of gold Gold has been known since prehistoric times, mainly because it can be found in nature in the form of grains in the rocks or at the bottom of rivers and floods. In 2000 BC, the Egyptians began to extract it. The death mask of Tutankhamun, who died in 1323 BC, contained 100 kg of metal, and the royal tombs of ancient Ur (modern Iraq) contained gold objects. The minting of gold coins began in the Kingdom of Lydia, presently in Turkey, and began in 640 BC. They used an alloy called Electrum, an alloy of gold and silver, and the first gold coins were minted under King Croesus.