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US 12,656,021 B2Granted
Concentrated solar cement kiln
OwnerPeter G Newtoninventor
Life of this patent
Estimating the term…
Abstract
The subject invention combines two long-established technologies—cement kilning and solar radiation concentration—to create a new process to kiln cements that will significantly reduce the non-renewable energy consumption and pollution and CO2 generation of current cement kilning methods. The process entails using focused solar radiation to heat closed, sealed containers containing cement raw materials to kiln the raw materials to produce cement, including Portland cement.
Claims7
A process for the kilning of cement using concentrated solar radiation to reduce environmental impacts of cement production, the process comprising:
- Providing closed, sealed barrels, containing cement raw materials and having a longitudinal rotational axis, two end surfaces, and an exterior circumferential surface extending between said two end surfaces;
- and
- Kilning said cement raw materials to produce cement, by rotating said barrels on said longitudinal rotational axis, and transporting said barrels longitudinally through a focal zone comprising concentrated solar radiation from ground-mounted mirror arrays beside the focal zone, wherein said ground-mounted arrays of mirrors reflect solar radiation up to mirrors in the focal zone above the barrels so that said concentrated solar radiation is directed onto the exterior circumferential surface of each barrel, whereby pollutant gases emitted by the cement raw materials during the kilning are contained in the closed, sealed barrels.
Dependencies are inferred from the claim text.