Evaluation of Resource Efficiency on the Use of Natural Stone Powder in Silicate Ceramics Bodies – Part 1

The issue of energy saving is of major importance for the ceramics industry. In addition, analysis of the respective resource consumption is shifting increasingly into the focus of interest [1,2]. Sensible utilization of industrial waste in ceramic bodies in energy, economic and ecological terms requires knowledge of the energy and raw material consumption as well as the CO2 emissions for the manufacture of ceramic products. From this, potential savings for the use of secondary raw materials as well as for an efficient use of resources can be derived.

1 Introduction

The use of secondary (waste-derived) raw materials in ceramic bodies has been studied numerous times in the past. Secondary raw materials are waste materials from other industrial sectors, which cannot be put to any further use there, and sometimes have to be landfilled at high cost. Some of these waste materials are produced in a form suitable for use in the ceramics industry, e.g. as filter dusts, filter cake, grinding residues (undersizes). Besides economic aspects, landfilling must be critically questioned against the background of a sustainable life and subsistence strategy....

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