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Greeting
recently we started the design of a iron ore pelletizing plant using rotary kiln method (alis chalmerz technology).
the S content of iron concentrate is about 0.2% and we want to reach to less than 0.008% in the pellet product.
but the EPC contractor stated that it is not possible to burn this amount of Sulfur in the the rotary kiln method.
my question is:
1- how many percent of sulfur can be burnt in the rotary kiln?
2- why it is possible to burn S in the Lurgy technology but is not possible in the alis chalmerz method (Becouse in another project, using Lurgy Technology, the EPC Contractor accepted to burn about 1% of sulfur in the plant)?
Thank you for your help.
Dr. M. Aazami
Process Engineer