STATE OF THE ART REFRACTORY CORROSION TEST WORK FOR THE NONFERROUS METALS INDUSTRY

摘要

This study is a result of a collaboration between Stillwater Mining Company and RHI AG aimed at the determination of refractory products to improve the lining life in the customer's vessel by using optimized corrosion testing methods at RHI's Technology Center. As a first part of the work a complete chemical and mineralogical characterization as well as FactSage calculation was carried out based on provided slag samples. According to these results the rotary kiln tests were realized at different process temperatures with several selected magnesia-chromite- and alumina-chromia bricks. Based on the mineralogical investigation a high chemothermal load caused by the Ca-ferritic slag resulted in a deep-reaching infiltration of the brick microstructure and corrosion of main brick components. On the basis of this outcome the selection of suitable brick types will be described in detail in the following article.