Preparation of high porosity bricks by utilizing red mud and mine tailing. (10th January 2019)

• Record Type: Journal Article
• Authors: Kim, Youngjae; Lee, Youngmin; Kim, Minseuk; Park, Hyunsik
• Is Part Of: Journal of cleaner production. Volume 207(2019)
• Page Start: 490
• Page End: 497
• Publication Date: 2019-01-10
• Subjects: Red mud -- Gold tailing -- Gelation of slurry method -- High porosity insulator -- Thermal conductivity; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2018.10.044
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: Due to tremendous size and environmental concerns, management and utilization of red mud and gold tailing have received attention for the last few decades. In the present study, the novel process for utilization of red mud and gold tailing for high porosity brick was proposed and its physical properties were evaluated. By adopting the gelation of slurry method, above 75% apparent porosity; that is hardly obtainable by traditional method, was successfully achieved. Morphologies investigation including pore size distribution revealed that the increasing mixing ratio of gold tailing results in the increasing pore diameter along with changing into closed cell structure. In addition, effect of crystalline phase on thermal conductivity was evaluated and found the dominant effect of quartz phase on thermal conductivity. As a result, increasing of gold tailing leads to increasing of thermal conductivity. Finally, the thermal conductivity of present system was successfully estimated by using Ashby-Glicksman model considering the different type of cell structure. Highlights: The applicability of mining waste and red mud for high porosity brick was evaluated. The gelation of slurry method was adopted. Above 75% of apparent porosity was achieved within shorter sintering time. Mean pore size and its cross-sectional image was investigated by using Micro-CT. Thermal conductivity of present system was estimated by Ashby-Glicksman model.