The role of manganese ore reduction morphology development in setting reduction mechanisms.

摘要

Manganese ores differ extensively in their mineralogical and bulk chemical composition. The result is that these ores follow different mineralogical morphology development paths as the reduction reaction proceeds in the production furnace. Mineralogical factors such as composition and distribution of initial liquid oxide formed at specific temperatures, as well as iron and manganese metallisation patterns are significant determining factors in the relative importance of different parallel reduction reaction mechanisms in each ore type. In this study applied mineralogy techniques were used to identify and analyse matrix liquid oxide phase formation in manganese ore reacted at 1300°C with graphite reductant. The study includes three South African ores from the Kalahari Manganese Field, the ores represent both the Wessels-type and Mamatwan-type mineralogy.