Energy-saving methods of conditioning green brick bodies for low-temperature drying

Research project conducted by: Research Alliance of the Clay Brick and Tile Industry reg'd (FGZ)
Project number
AiF 16567 N
Project funded by
BMWi through the Federation of Industrial Research Associations "Otto von Guericke" reg'd (AiF)
Implemented by
Brick and Tile Research Institute Essen Regd (IZF)
Project manager
Dr.-Ing. Anne Tretau

1 Context and formulation of problem

Low-temperature drying is a modified form of open-air drying with the aid of modern plant and control technology. In heavy clay production, the introduction of low-temperature drying enables dissolution of the energy inefficient kiln/dryer closed heat cycle. For the advancement of this technological step forward, it is very important that the green brick strength be enhanced, particularly during the initial, shrinkage-attended stage of drying. Higher strength makes it possible for the material to tolerate without cracking the high shrinkage stresses...

Issue 11/2010

Improving the energy efficiency of drying installations with the use of modern low-energy dryers

1 Background In industrial countries green clay bricks and tiles are dried convectively with hot air produced by burners or other types of artificial energy supply. Drying is therefore associated with...

Issue 6/2011

Enhancement of the hydrostatic capillary tension in wet brick green bodies for a reduced susceptibility to cracking during drying

1 Context and problem statement After shaping, brick green bodies exist as capillary-porous solids, the pores of which are filled with water and which are enclosed by a water sheath. Capillary suction...

Issue 03/2010

Causes and avoidance of damage on account of diffusion-dependent reactions in the preheating zone of tunnel kilns with specific consideration of the pore structure of green bricks

1 Background After they have been dried, green clay bricks enter the preheating zone of the tunnel kiln with a varying residual water content. In this preheating zone, the following processes take...

Issue 02/2010

Concepts for reducing the loss of exhaust air from dryers in the clay brick and tile industry

1 Initial situation and problem description More than half of the energy used in the production of clay bricks and tiles is currently used for drying green bricks and tiles. The hot air needed for...

Issue 08/2014

Energy-conserving method for obtaining highly porous structures in brick clay

Context and formulation of problem Vertically perforated clay bricks are highly porosity enhanced wall-building masonry units displaying low thermal conductivity. The thermal conductivity of stuffed...