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Vogt S.,Robert Thomas Metall und Elektrowerke GmbH and Co. KG
ZI, Ziegelindustrie International/Brick and Tile Industry International | Year: 2011

Following a rundown of determining parameters for the drying process, Part 1 (Zi 5/2011, pages 12-26) of this report compared and analysed measured economic operating data of various air circulation systems for masonry brick and clinker dryers. Now, Part 2 presents corresponding data for roof tiles. In nearly all regards, rapid dryers emerge as the most economical variant, often by a wide margin.


Leu E.,Robert Thomas Metall und Elektrowerke GmbH and Co. KG | Kraemer R.,Robert Thomas Metall und Elektrowerke GmbH and Co. KG | Hundt C.,Robert Thomas Metall und Elektrowerke GmbH and Co. KG | Vogt S.,Robert Thomas Metall und Elektrowerke GmbH and Co. KG
ZI, Ziegelindustrie International/Brick and Tile Industry International | Year: 2010

Rotho is expanding its innovative product range for the drying of heavy clay products to include rotary fans in different sizes and with different fittings. As before, rotary fans are still used in many sectors of the brick and tile industry for air recirculation. From an analysis carried out by the research department of Rotho it is apparent that there is still considerable potential for the more effective utilization of this technology, which is described in this article.


Leu E.,Robert Thomas Metall und Elektrowerke GmbH and Co. KG
ZI, Ziegelindustrie International/Brick and Tile Industry International | Year: 2015

This article describes how the installation of guide wheels in rotary fans affects the flow of air into and out of the diffuser. In addition to altering the flow profiles and pressure losses, guide wheels help improve the drying capabilities of rotary fans. Potential savings on electricity are pointed out.


Vogt S.,Robert Thomas Metall und Elektrowerke GmbH and Co. KG
ZI, Ziegelindustrie International/Brick and Tile Industry International | Year: 2015

A number of veteran methods for evaluating the suitability of raw materials, including the Winkler diagram, the Augustinik diagram and material qualification testing according to Freyburg, are critically examined and accommodated to presently employed product qualities and production technologies. Based on past experience with quantitative mineral analysis, mineral compositions considered optimal for diverse heavy clay product categories are stated. Here in part 2, a procedure is described for the pre-optimization of body compositions by means of simple search techniques, linear optimization methods and algorithms.

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