The Roman Cement manufacturing process relies on known grinding and classifying equipment that is widely available commercially. Different set-ups are possible depending on the type of raw materials used and desired performance attributes of the Roman Cement blend. In most instances, a vertical roller mill and one or two classifiers will give the flexibility required for a range of binary and ternary Roman Cement blends. A schematic of a typical plant set-up is shown in the picture on the left.
Raw materials used in the production of Roman Cement are Clinker that can be sourced from domestic or overseas production depending on availability and price, and Supplementary Cementitious Materials (SCM) such as fly ash, blast furnace slag, steel slag, limestone, natural pozzolans, post-consumer recycled glass, or any other mineral that can be sourced economically and whose use is allowed by local norms and construction practices.
The capital cost for a Roman Cement manufacturing facility is only a fraction of the capital that would be required to build a Portland cement production plant of equivalent capacity. For example, the cost of a fully operative Roman Cement plant with a total production capacity of 1,000,000 metric tons/year would be $45-$60 million.
Schematic representation of a Roman Cement production facility