NICKEL
Usefulness of nickel was accidentally, and may dikesan so 3500 BC. Gangsa from now recognized as Syria has a nickel content so that the two peratus. Additionally, Chinese manuscripts imagine that unlicensed "white copper" (eg baitung) has been used in the East between 1700 BC and 1400 BC. However, due to nickel ore silver ore easily mistaken premises, any misconception about this and more ditumpukan usefulness to the present.
Nickel contain adequate minerals (eg kupfernikel, means to copper devil ("Nick"), or false copper) were used for mewarnakan glass to green. In 1751, Baron Axel Fredrik Cronstedt're trying to produce copper from kupfernikel (now known as nikolit), and vice versa can be a white metal that was held by him as a nickel.
Sarekat In America, the term "nickel" or "nick" was originally used for money syiling copper-nickel cents Indians, introduced in 1859 and later, for money syiling three cents which was introduced in 1865. The following year, the name used for the nickel five-cent shield so today. Money-money syiling that done than pure nickel is used for the first time in 1881 in Switzerland.
The properties of nickel are:
• White shiny
• Very hard
• No rust
• Resistant to dilute acids
Utam nickel ore is nickel sulfide.
Nickel-nickel are exported in the form of 3 kinds of ore, nickel rough, and ferronickel. Nickel mining area in the Koala, Soroako, North Maluku. Nickel mining way through various ways, among others;
• Felling trees and shrubs
• Stripping the land surface
• Excavation with ladder system (benching system) that is started from the ground up following the contour line with a power shovel digging tool or shovel dozer nickel processing through several stages:
• Baking
• Consolidation
• Use of Nickel Electrolysis
• To coat the items made of iron, copper, steel because nickel has a hardness, corrosion resistant and easy to gloss when rubbed.
• To make stainless steel (stailess stell)
• To make aliase with copper and some other metals such as:
a. Monel (Ni, Cu, Fe)
Used to make electricity transmission instrument
b. Nikrom (Ni, Fe, Cr)
Used as a heating wire
c. Alniko (Al, Ni, Fe, Co)
To make a magnet.
d. Palinit and Invar is nickel alloy that has the same expansion coefficient of glasses used as an electric wire embedded in glass, for example in Bolam incandescent lamps.
e. Nickel powder is used as a catalyst, for example in hidrogenansi (compaction) of coconut oil, also in petroleum cracking.
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