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Refractory Challenges in Lead and Zinc Furnaces

2020; Springer International Publishing; Linguagem: Inglês

10.1007/978-3-030-37070-1_2

2367-1181

Dean Gregurek, K. Reinharter, Jürgen Schmidl, A. Spanring,

Metallurgical Processes and Thermodynamics

Refractory linings in primary or secondarySecondary leadLead and zincZinc furnaces like QSL reactor, KIVCET furnace, Top Submerged Lance Technology (OutotecOutotec AusmeltTM/IsasmelterTM), TBRC/Kaldo furnaces, reverberatory furnace, and short rotary furnace, as well as Waelz kiln, are exposed to several stresses rather complex in their interaction. In the present work, the main wear parameters, such as corrosion by slag, high sulfur, soda and iron oxide supply as well as reduction, are briefly introduced and discussed. The extraordinarily high SiO2 supply results in “forsterite bursting” combined with volume expansion. High operation temperatures in the furnace support microstructural brick degeneration. All mentioned wear phenomenaWear phenomena result in severe degradation of brick microstructureMicrostructure and consequently to decreased lining performance. The obtained information and insights serve as a basis for improving refractory materials to provide the best solutions for RHI Magnesita’s customers.