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Encyclopedia > Polling (metallurgy)

Polling in metallurgy is the process of refining a crude metal which has its own oxide as impurity. The molten metal is stirred with logs of green wood in a tank. The heat from the molten metal decomposes the wood which liberates hydrocarbon gases which reduce the oxide impurity into the metal. This method is generally used for refining copper and tin.


  Results from FactBites:
 
Metals and Metallurgy | Encyclopedia of Religion (441 words)
It required the discovery of the smelting of ores to inaugurate a new stage in the history of mankind.
It was the metallurgy of terrestrial iron that made this metal fit for everyday use.
The beginnings of iron metallurgy on an industrial scale can be fixed at a period between 1200 and 1000 BCE, in the mountains of Armenia.
Polling :: Consultants : RSS Feeds : Gourt (1650 words)
In politics, polling is the surveying of public opinion on an issue.
In metallurgy, polling is the refining of a crude metal made impure by its own oxides.
Zogby International - A leading polling firms in the United States and the official North American and South American political polling agency for Reuters.
  More results at FactBites »

 

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