CERAMIC DESIGN TO INCLUDE SEVERAL WASTES FROM STEEL PLANTS

N. QUARANTA; M. CALIGARIS; H. LÓPEZ; M. UNSEN; N. LALLA; G. PELOZO; A. CRISTÓBAL

Simposio; Sardinia 2011 Thirteenth International Waste Management and Landfill Symposium; 2011

In this paper, the design of clay ceramic bodies containing different wastes from steel plants is discussed. For this purpose, the studied wastes are white powders from kilns, red dust generated in the recovery of pickling acid, the so-called Ruthner powder, and sludge from the blast furnace. Both, waste and clay to be used as raw material for designing ceramic products were characterized by different techniques. From the results of the diverse tests carried out, it can be inferred that it is feasible to incorporate Ruthner powder and blast furnace sludge to clay mixtures in high percentages and there will be no problems during the forming process and subsequent sintering, according to the parameters normally used in the ceramic industry. In contrast, the high content of Ca, and the presence of carbonates in the white powder samples suggest that the incorporation of this material may be feasible only in very low percentages.