Typical properties of foundry cokes

Typical properties of foundry coke are given in Table 4.4  

The data in Table 4.4 are taken from supplier specifications. Local standards may use higher limit values. 

This technique is commonly applied in European foundries using cupola furnaces. 

A flux is used to render the slag fluid enough to separate from the iron and to allow it to flow freely from the cupola. The most commonly used flux is limestone (calcium carbonate), which calcines in the cupola shaft to form lime, a basic oxide, which then combines with the other slag-forming constituents (mainly acidic in character) to provide a fluid slag. 

The basicity of a slag is given by the following ratio (CaO % + MgO %)/Si02 % 

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Table 4.4 Typical properties of foundry cokes [197, Nalonchem, 2002]...

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