Slag

Slag is formed in electric melting furnaces from the products of oxidation of the elements in the charge, particularly the iron, silicon and manganese; from refractory erosion and from dirt, sand or rust on the charge. Slag floats on the surface of the metal and must be removed before tapping. Since slag removal is an unpleasant task for the furnace operator, it is advisable to avoid the use of dirty or rusty charge materials. Many slags are liquid and of low viscosity and difficult to collect, they can be coagulated by adding SLAX. At molten metal temperatures the SLAX granules expand and form a low density, high volume crust which mops up the slag, which can then be lifted off the metal with ease, leaving the surface clean.

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