Patent · US Active

Apparatus and method for feeding materials to a cement mill

US7699930B2 · kind B2 · utility

4Cited by

20References

12Claims

0Family size

Assignee

LaFarge North America · US

Inventors

Horace H. Compton · Independence, US
Nathan A. Fernow · Independence, US
Ajay Joshi · Kingwood, US

Key dates

Filing date	Nov 21, 2006
Grant date	Apr 20, 2010
Priority date	—
Expiry date	Oct 28, 2028

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02W30/91
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A flow enhanced calcium sulfate product includes a calcium sulfate source material, such as a flue gas desulphurization by-product, is pre-blended with a granular feedstock exhibiting good cementitious properties. The flow enhanced calcium sulfate is fed to a cement mill where it is combined with clinker during a finishing grinding process for portland cement. The flow enhanced calcium sulfate exhibits good flowability without changing the properties of the cement.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.