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Old 02-11-2007, 15:41   #1411
Mr Aleks
Senior Member
 

re: Change A Letter - 4 Letter Words

slag.............

and before anyone moans...

Slags are the by-product of smelting ore to purify metals. They can be considered to be a mixture of metal oxides; however, they can contain metal sulfides and metal atoms in the elemental form. While slags are generally used as a waste removal mechanism in metal smelting, they can also serve other purposes, such as assisting in smelt temperature control and minimizing re-oxidation of the final liquid metal product before casting.
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