Clays from the lignite mining district in the Rhineland – new raw materials for building ceramics!?

In the scope of a study commissioned by RWE Power AG, studies were conducted at the FGK research institute on the ceramic suitability of clay raw materials from open lignite mines. In ongoing surface mining, clays are recovered from several-metres-thick and homogeneous mining horizons. The individual horizons differ in their chemical composition and mineralogy, as a result of which a wide and varied spectrum of potentially usable raw materials is obtained. The clays were first analysed in chemical-physical processes. Then their ceramic processing properties were tested and fired samples assessed. The results showed that the properties of the clays meet quality requirements in different ceramic segments. With regard to sustainable supply of raw materials, it would therefore be expedient to utilize these clays in higher-value applications.

Stefan Ginzel (M. Sc.), Forschungsinstitut für Anorganische
Werkstoffe - Glas/Keramik-GmbH, Höhr-Grenzhausen


Related articles:

Issue 5/2018

Clays from the Rhenish lignite mining – alternative raw materials for heavy clay ceramics

1 Introduction Lignite mining in the Rhenish mining district has a long history and has been going on in the region at the latest since industrialization in the 19th century. In the three opencast...

Issue 04/2021

100 years of ceramic raw materials

In 1921, Adolf Gottfried started with the extraction of high-quality clay in Fonsau/Egerland in the Wildstein basin. In the time before the Second World War, Adolf Gottfried Tonwerke had evolved into...

Issue 10/2009

Coal clay from coal mining for the clay brick and tile industry

In the Ruhr district of Germany, DSK Deutsche Steinkohle AG wins coal from depths of more than 1?000 m. During mining, besides the pure coal itself, a lower energy by-product is won, which is...


ceramitec 2018: Efficient innovations in the heavy clay ceramics segment

ceramitec 2018, the international key trade show of the ceramics industry which isscheduled to be held from, will provide comprehensive information about innovative products and current trends in the...

Issue 09/2012

Sacmi presents new technologies for heavy clay ceramics

At Tecnargilla 2012, the Imola-based Sacmi Group will be presenting its latest developments for the production of tiles, sanitaryware and heavy clay ceramics. In the special Claytech section...