Metallurgical coal is a very important resource. It begins its useful life as bituminous coal, high quality, high in carbon, and very black. This material is then heated in large, airless ovens, where nearly all of the coal?s impurities are burned off. Left behind is a foam-like, hard material made nearly entirely carbon, which is called coke.
Coke is used as fuel in blast furnaces. When burned, it provides consistent, clean heat at very high temperatures. These furnaces are used to turn iron ore into metal.
Metallurgical coal is also necessary ingredient in the production of steel. Steel requires carbon, and since coke is nearly 100% carbon, it works nicely.Thermal Coal:
Thermal coal is by far the most common, and cheapest coal. It is used in the production of electricity at thermal power stations.
Uses of Zinc:
Zinc is a sacrificial protector. This means, that if zinc is placed alongside another metal, such as iron, the iron will not rust. Instead, the zinc will begin to corrode and the iron will simply stay strong. Zinc also takes a long time to corrode, giving more life to the metal which it is protecting. This is the reason why car manufacturers can offer 12-year long guarantees that their cars won't rust.
All life on Earth requires zinc to survive, it is one of the essential nutrients. Zinc is in mineral water, in fertilizer for plants, and in dietary supplements. More than 300 enzymes in the human body require zinc, everything from experiencing taste and smell to resisting disease and healing wounds. Because of this zinc is an ingredient in cough drops, sunburn treatments, baby creams, dandruff shampoos, and hundreds of everyday items.
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