Dr.-Ing. Stefan Vogt

Benefits and boundary conditions of fast firing clay
building products (Part 2)

Pictures/Bilder: Stefan Vogt

»6 Setting arrangement in a conventional backing brick kiln (SimSet program)

Pictures/Bilder: Stefan Vogt

»7 Setting arrangement in a conventional facing brick/clinker kiln

»8 Setting arrangement in a conventional roof tile kiln

»9 Setting arrangement in a fast firing backing brick kiln

»10 Sankey diagram of mean energy balance data of 44 examined backing brick tunnel kilns [51]

»11 Base-area comparison of the conventional kiln
(L x W x H = 142.3 x 8.4 x 3.6 m) and of the fast-firing kiln
(L x W x H = 43.0 x 4.2 x 3.3 m) for a daily output of 500 t backing bricks

»12 Sankey diagram depicting the energy balance of the fast firing backing brick kiln

This contribution is the last of four articles dealing with kiln settings in terms of pressure drop, flow distribution, convective heat transfer and optimal configuration, as well as with the boundary conditions and benefits of fast-firing kilns for clay building products [1-4]. Part 2 of this tripartite article describes the sizing of fast firing kilns.

4 Sizing of fast firing kilns

In this installment, an attempt is made to define the dimensions of future, thermally optimized fast firing kilns and their accoutrements according to present best-practice expertise and to the firing times postulated in item 2.

4.1 Sizing the firing channel

Nearly all clay product formats commonly employed in Europe and the USA can be fired in firing channels of similar size and dimensions by varying the number of hearths and/or the number of products per hearth. This is of particular importance for future fast firing kilns, which will be intended to handle as...

Robert Thomas Metall- u. Elektrowerke GmbH & Co. KG
www.rotho.de

Issue 2018-4 Dr.-Ing. Stefan Vogt

1 Introduction According to research by Böger [2], Carl Emmel was awarded German Imperial Patent No. 13604 on May 1, 1880, for his counterflow kiln. The first reference to a foreign patent found by...

Issue 2018-5 Dr.-Ing. Stefan Vogt

6 Counterflow kiln with forced circulation In the interest of ongoing development for counterflow kilns, the transition to forced circulation with the aid of supplementary circulation fans (»4) would...

Issue 2017-5 Dr.-Ing. Stefan Vogt

the further development of tunnel kilns for firing clay products has always been and still remains geared to fast firing as a long-term objective - Karsten Junge [13]. 1 Introduction Clay...

Issue 2018-1 Dr.-Ing. Stefan Vogt

5 Economic parameters of fast firing kilns The cost of investment for a conventional tunnel kiln with a daily output of 500 t backing bricks presently comes to around 4.7 mill., depending on the...

Issue 2009-09

1 Introduction The combined heat system between the kiln and dryer was already used in individual cases at the beginning of the 20th century in large-volume dryers arranged above the annular kiln...

4 Sizing of fast firing kilns

4.1 Sizing the firing channel

ZI 6/2017

ZI 6/2017

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