Do Yourself -I

The slag from a copper converter contains the following:
The flux carries 75% , 5% Fe, and 2% The matte charged is 40 tons of 34% copper grade. The flus is added in batches of 3000 kg; the converter is blown to slag of the above composition after each addition and the slag pored off before the next batch is added. The air rate is 100.

Calculate (a) the time of each partial blow, (b) The number of partial blows and the weight of flux to be added for the last partial blow to produce a slag of the same composition as in other partial blows and (c) the total time for blowing the charge to blister copper.

Answer:

(a) 87.7 minutes 

(b)   5 blows, 1903 kg 

(c) 548.5 minutes