The metal ore mining industry segment covers the extraction of metal ores, primarily gold, silver, iron, copper, lead, and zinc. These naturally occurring minerals have a variety of industrial purposes: gold and silver are primarily used in jewelry and high-end electronics, iron is used to produce steel, copper is the main component of electrical wiring, lead is used in batteries, and zinc is used to coat iron and steel to reduce corrosion and as an alloy in the making of bronze and brass.
The process of mining cone crusher the earth and finding the metals, minerals, etc and again making the earth to return back to its original state consists of different steps. Generally, mining techniques can be broadly classified into two types, they are Surface Mining and Underground Mining.
In pre-historic period, when the people had found metals like copper, iron on or close to earth surface, they used to manufacture some tools and weapons.
The ancient known mine is the Lion Cave which is in Swaziland. Ancient people used hammers, crude picks, etc. But they found very difficult to find the metals or any other precious stones which was in too deep. So they slowly started to invent new ideas to make the work simple. Since there is no blasting method available in that period, they first used to keep fire on the hard rocks to make it soft then they used water to cool it up and so they had broken those hard rocks easily.
The slaves, prisoners of war and the people who did criminal things had forced to work on the mining areas. And the kids were used to carry the ores from the underground mining area to the outer surface. Then the people who are so weak to work underground had made to separate the rich and poor metals.
In some countries they used Black Powder to disclose ore veins and earth to loosen. Then as the development occurs, the people have found a plenty of techniques to find the metals, minerals and other precious stones.
Magnesium is the third most used metal, following iron and aluminium. Magnesium derives its name from magnesite,
a magnesium carbonate mineral, and this stone in turn is told to owe its name to magnesite dumps found in Magnesia, a region in the antique Greek region of Thessaly. The British chemist Humphry Davy is said to have manufactured a mixture of magnesium in 1808 by electrolyzing damp magnesium sulfate, utilizing mercury as a cathode. sand washer supplier:http://www.china-hxjq.com/p42.html
The 1st victorious industrialized manufacture was begun in Germany in 1886 by Aluminum und Magnesium fabrik Hemelingen, depending on the electrolysis of molten carnallite. Hemelingen later became constituent of the industrial compound IG Farbenindustrie, which, for the duration of the 1920s and 30s, urbanized a process for manufacturing huge quantities of molten and fundamentally water-free magnesium chloride (now branded as the IG Farben process) as well as the expertise for electrolyzing this merchandise to magnesium metal and chlorine.
Mining and concentrating
Both dolomite and magnesite are hauled out and concerted by conservative methods. Carnallite is hauled out as ore or alienated from other salt amalgams that are brought to the exterior by solution mining. Naturally happening magnesium including brines are determined in large ponds by solar desertion.
Extraction and refining
A physically powerful chemical reagent, magnesium structures steady compounds and responds with oxygen and chlorine in equally the liquid and gaseous status. This means that taking out of the metal from unrefined materials is a force exhaustive procedure requiring nicely tuned technologies. Commercial construction pursues 2 completely dissimilar methods: electrolysis of magnesium chloride or thermal lessening of magnesium oxide. Where power charges are stumpy, electrolysis is the cheaper means and, undeniably, it accounts for something like 75 percent of world magnesium production.
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