Cement kiln dust (CKD)-methods for reduction and control

Abstract

Cement kiln dust (CKD) is a waste product generated during the manufacture of Portland Cement. Volatile compound build-up in cement kilns results in the need to purge the system which stabilizes the process or brings the product quality within specifications. This paper outlines a stepwise approach for reducing CKD generation. The present cost penalties for generating CKD along with potential future liabilities of stored dust should make CKD reduction a main priority. Many cement plants have gone through similar investigations in the past, however most could benefit from re-examining their present dust wasting situation and applying new testing programs now available. This investigative process can be relatively simple and should be a high priority on any cement plant's agenda. Following a stepwise, organized approach can often result in large reductions in dust wasting. Today's technology allows the improved sampling and rapid chemical analysis needed for each plant to establish and follow a volatile management program resulting in the reduction of CKD generation. >