Articles by Ralph Ruark

Information Equals Dramatically Improved Results

August 6, 2000
Knowing what makes a defect occur is important, and being able to relate it to a particular firing condition is crucial. Multiple, well-monitored kilns can be used to discover the origination of firing defects scientifically, by analyzing the differences in atmosphere conditions, circulation and temperature.
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Kiln Connection: Making the Connection

July 21, 2000
It is a genuine pleasure to introduce a new bimonthly column here at CI—The Kiln Connection—and I couldn’t be more pleased to be its author.
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Kiln Connection: Managing Condensation In Tunnel Kilns

July 20, 2000
Volatile constituents can sometimes condense in the early preheat or early cooling in certain tunnel kilns. At times, the condensates fall on the product and cause dirt defects. Sometimes the condensates are so chemically reactive that it damages the kiln lining by fluxing the refractories in both the preheat and cooling zones. In either case, undesirable precipitation of volatiles can cause serious product loss or even kiln damage.
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Kiln Connection: Your Tunnel Kiln

May 11, 2000
Tunnel kilns account for the bulk of worldwide ceramic firing. For many products, a tunnel kiln offers the potential for better temperature uniformity and product quality—with an energy consumption that is typically half that of periodic firing systems.
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