Many cement plants in Europe began burning alternative fuels in the main burner many years ago. Because the fuel must be transported pneumatically into the main burner and the particle residence time in the kiln at the main burner is quite short, the fuel must be fully prepared. Independent of the feeding, a gravimetric dosing device is mandatory and its accuracy should increase with the substitution rate.
2 General challenges in dosing secondary fuels
Compared to other raw materials and primary fuels, solid alternative fuels tend to be more difficult to handle: material...