Continental completes portland-limestone cement migration

Sources: Summit Materials Inc., Denver; CP staff Summit Materials’ Missouri subsidiary, Continental Cement Co. LLC, has consummated a full conversion from clinker-only to portland-limestone cement output at its Hannibal plant— four months after a similar transition at a sister mill up the Mississippi River in Davenport, Iowa. The PLC is typically finished at a 90/10 clinker and ground limestone blend. …

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Cemex to pilot high temperature electric device for cement kiln phase

Sources: Coolbrook B.V., The Netherlands; Cemex S.A.B. de C.V., Monterrey, Mexico; CP staff Cemex S.A.B. de C.V. is the first cement producer to announce testing of Coolbrook Roto Dynamic Heater (RDH) technology, which uses electric power to attain the 1,500-1,700°C kiln temperatures required to calcine and convert limestone and other raw feeds to clinker. At plant scale, an RDH apparatus…

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Argos USA channels carbon dioxide in cement kiln, ready mixed loop

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Atlanta-based Argos USA has anchored a five-member consortium targeting a closed loop model of carbon dioxide capture and recycling in cement and concrete production. In an early-2018 demonstration, the company used CO2 from its Calera, Ala., cement plant in commercial concrete produced at its Glenwood, Ga., batch plant. That Atlanta-area ready mixed operation is among nearly 100 sites, primarily in the U.S., equipped with CarbonCure Technologies CO2 storage and injection devices. The CarbonCure process uses the greenhouse gas to promote cement hydration in high to zero slump concrete.

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