Influence of Slag Properties on the Alkali Cycle of a Blast Furnace
(Room 404)
16 May 16
10:30 AM
-
11:00 AM
Tracks:
BF Modeling, Blast Furnace Operating Improvements
Slag properties like temperature and basicity are generally known as influencing parameters for the evaporation of potassium and sodium in the blast furnace hearth. Due to their harmful effect on refractories, coke, burden material and top gas, the operator wants to decrease the generation of gaseous alkali compounds by the slag phase. To predict the influence of temperature and slag composition on the alkali mass flows, a thermochemical model was developed. This multi-zone model enables a determination of the alkali concentration over the blast furnace height and gives an understanding of the most effective parameters on the alkali cycle.