Cement production

US11254611B2 · kind B2 · utility

Inventors

• Elise Berodier · Lausanne, CH
• Nathan A. Tregger · Northborough, US
• Josephine H. Cheung · Columbia, US
• David F. Myers · Cary, US
• Li Zhang · Acton, US
• Dorota Kazmierczak · Acton, US
• Lawrence R. Roberts · Acton, US
• Denise A. Silva · Arlington, US
• Richard Sibbick · Northborough, US
• Jeffrey Thomas · Nashville, US
• Mark F. Roberts · North Andover, US
• Riccardo Stoppa · Milano, IT
• Elizabeth G. Burns · Windham, US

Key dates

• Filing date: Dec 20, 2018
• Grant date: Feb 22, 2022
• Expiry date: Nov 12, 2039

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P40/121
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The present invention provides a method and system for manufacturing cement wherein ground particles of cement and calcium sulfate are subjected to infrared sensors, laser sensors, or both, so that emanated, irradiated, transmitted, and/or absorbed energy having wavelengths principally within the range of 700 nanometers to 1 millimeter can be monitored and compared to stored data previously obtained from ground cement and sulfate particles and preferably correlated with stored strength, calorimetric, or other data values, such that adjustments can be made to the mill processing conditions, such as the form or amounts of calcium sulfate (e.g., gypsum, plaster, anhydride), or cement additive levels. The strength and other properties of cement can be thus adjusted, and its quality can be more uniform.