Preparation and characterization of low-cost refractories for aluminum-melting-furnace linings from ferrotitanium slag. Issue 19 (1st October 2022)

• Record Type: Journal Article
• Authors: Li, Yichong; Zhang, Han; Zhao, Huizhong; Yu, Jun; Ma, Jiuhong; Feng, Li; Liu, Yanli
• Is Part Of: Ceramics international. Volume 48:Issue 19(2022)Part A
• Page Start: 27448
• Page End: 27455
• Publication Date: 2022-10-01
• Subjects: Ferrotitanium slag -- Refractory -- Calcium hexaaluminate -- Molten cryolite resistance; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.06.035
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Management and utilization of solid waste are necessary for sustainable development in the metallurgical industry. This study focuses on the use of ferrotitanium slag (FTS) as a low-cost source of hibonite in the refractory lining of an aluminum-melting furnace. FTS enhances the resistance of castable samples to cryolite melt penetration but reduces their bulk density and cold mechanical strength. To explain this enhancement mechanism, we present a model in which the Al2 O3 and SiO2 components in the castable samples react with the cryolite melt to form a high-viscosity barrier layer against the molten cryolite. Moreover, the well-developed calcium hexaaluminate crystals in FTS, which show excellent resistance against Na + and F −, prevent the penetration of cryolite melt through the FTS aggregate area, and reduce the penetration speed. By promoting high-efficiency resource utilization, this study contributes to the development of a circular economy in the metallurgical industry.