Patent · US Expired

Process and apparatus for control in burning and slaking of lime and causticizing

US4889592A · kind A · utility

1Cited by

10References

21Claims

0Family size

Assignee

STFI · SE

Inventors

Birgitta S. Andersson · Enebyberg, SE
Malin C. Zethraeus · Stockholm, SE
Torbjorn Herngren · Alvesta, SE
Jan-Erik V. Gustafsson · Täby, SE

Key dates

Filing date	Nov 18, 1987
Grant date	Dec 26, 1989
Priority date	—
Expiry date	Nov 18, 2007

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S423/03
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

Method and apparatus for controlling the reactivity of lime produced in a lime cycle process that includes the steps of forming burnt lime in a kiln, washing and filtering of lime sludge, and causticizing of green liquor, which lime cycle process steps are carried out under variable operating conditions. At least one mechanical property of the burnt lime is measured, and at least one operating condition of the time cycle process is adjusted, based on the measured mechanical property of the burnt lime, so as to thereby control the reactivity of lime produced in the lime cycle process.

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