#7431. A Technical and Economic Comparison of Ball Mill Limestone Comminution with a Vertical Roller Mill

October 2026publication date
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Journal’s subject area:
Economic Geology;
Mechanical Engineering;
Geotechnical Engineering and Engineering Geology;
Chemistry (all);
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Abstract:
Wet flue gas desulfurization (WFGD), using limestone with forced oxidation (LSFO), is a common Flue gas desulfurization (FGD) process where limestone reacts with SO2 to produce gypsum (CaSO4.2H2O). For future FGD installations under consideration, the high energy cost associated with ball milling, particularly when pursuing fine grinding, has become a crucial factor raising the need for a quest for alternative milling technology to reduce the costs. The vertical roller mill (VRM) which has gained wide acceptance in the cement industry and is used for grinding raw materials (mainly limestone), is a promising alternative.
Keywords:
capital expense (CAPEX); dry milling; Flue gas desulfurization (FGD); limestone; operational expenditure (OPEX); vertical roller mill (VRM); wet milling

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