Quality control of coke input

The quality of the coke used has a direct bearing on the efficiency of cupola operations. It particularly affects the initial temperature carbon pick-up and the sulphur content of the iron. Specifying the foundry coke involves testing the following contents  

Fixed carbon The higher the carbon content, the higher the calorific value 

Ash content A high ash content is undesirable since it lowers the calorific value of the coke 

Optimising the coke input results in a higher process efficiency. 

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