OPTIMIZATION OF TECHNOLOGICAL AND ENVIRONMENTAL PROPERTIES OF CERAMIC PRODUCTS FROM FERRIC SLAG/MOLDING SANDS MIXTURES
A change from linear to cyclical production processes, as proposed by Industrial Ecology, is investigated in this paper, by means of the introduction of an industrial waste (Ferrosita.) into a ceramic manufacturing process. The recovery of zinc from electric arc furnace (EAF) dust by means of Waelz process generates large amounts of an industrial by-product called Waelz slag. The purpose of this work is to assess the influence of incorporating Waelz slag (Ferrosita(R)) and a Waelz slag/Molding sand mix into a clayey matrix by means of the study of the total cost of the process through mathematical model taking into account the limits of the technological and environmental properties of the ceramic bodies. The properties tested were: weight loss, bulk density, water absorption, firing shrinkage, modulus of rupture (MOR), soluble salts, diffusion test and carbon dioxide emission. A mathematical model has been developed in order to optimize the Waelz slag content in the clay mixture and minimize the cost of the ceramic process, fulfilling the quality standards of the technological and environmental properties. The results demonstrate that the introduction of Waelz slag or slag/sand mix may reduce the cost of ceramic process due to the lower use of natural clay, energy consumption and CO2 emissions.
Waelz slag Molding sand Ceramic Valorization Optimization
N. QUIJORNA B. GALAN A. COZ A. ANDR(E)S
Department of Chemical Engineering and Inorganic Chemistry. University of Cantabria Avda. Los Castros s/n. 39005 Santander, Spain
国际会议
北京
英文
640-645
2010-05-17（万方平台首次上网日期，不代表论文的发表时间）