Dr.-Ing. Stefan Vogt

Benefits and boundary conditions of fast firing clay
building products (Part 1)

This contribution is the last of a series of 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 1 of this tripartite article describes the boundary conditions to which fast firing kilns are subject.

“… 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 bricks stand in increasingly stiff competition with other building materials. Due to factors like proprietary extraction and preparation of raw materials and the two-stage drying and firing process, their technology of production is comparatively cost-intensive, and the costs of investment and operation are accordingly high. The thermal energy expenditures alone presently account for some 25 to 35 % of the...

Related articles:

Issue 5/2018 Dr.-Ing. Stefan Vogt

Do counterflow kilns hold the promise of an energy miracle? (Part 2)

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...

more
Issue 6/2017 Dr.-Ing. Stefan Vogt

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

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...

more
Issue 6/2018

New concept for improving heat transfer in tunnel kilns

Ceramic products have to be fired before they can be used, and tunnel kilns are well-suited for the job. To help optimize a kiln‘s energy efficiency, fans can be installed in the preheating and...

more
Issue 09/2009

The role of the combined heat system in the brick plant

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...

more
Issue 1/2020 M.Sc. Tino Redemann, Prof. Dr.-Ing. Eckehard Specht

Simulation of the firing of ceramic ware Part 1: Understanding the firing process in tunnel kilns

1 Introduction The production of building ceramics such as clay pavers, facing and hollow bricks and roof tiles is an energy-intensive process. Drying and firing in industrial practice require on...

more