Advances in FeNi Rotary Kiln Linings

摘要

The rotary kiln is one of the main components in the traditional RKEF FeNi production route, namely the combination of pre-reduction in the rotary kiln (RK) and final reduction and smelting in the electric furnace (EF). Rotary kilns are lined with refractory materials, typically alumina-based bricks and/or castables. As commonly known among experts, refractory linings are subject to a combination of different wear factors, namely chemical, mechanical and thermal, the main factors varying over the kiln length and the respective process zones. Refractory wear and repair intervals are decisive factors for kiln availability and the overall production process. The present paper describes recent RHI projects for FeNi rotary kiln linings, aiming at prolonged lining lifetime in highly stressed kiln areas and accelerating refractory installation.