Calcination temperature
Experts in mineral processing equipment have found that the effect of calcination temperature on the content of TFe and Al 2 O 3 in iron concentrates is obtained when the mass ratio of Na 2 CO 3 is 9% and the calcination time is 15 min . When the calcination temperature is 750~1000 °C , the Al 2 O 3 content in the iron concentrate gradually decreases with the increase of the calcination temperature , and the iron crystal position gradually rises . When the calcination temperature is 1000 °C , the Al 2 O 3 content decreases to 1.89% , the iron grade is increased to 60.95% , and the separation effect of aluminum and iron is better. However, when the calcination temperature continues to increase, the Al 2 O 3 content increases, and the separation effect of aluminum and iron deteriorates. Studies have shown that a suitable calcination temperature is 950~1000 °C .

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