Jaspilites of the Ingulets field and products of their hypergenic changes in connection to the problem of improvement of processing technology of hardly enrichable iron ores

Mineralogical, geochemical and spectroscopic characteristics of hardly enrichable fer­ruginous quartzites of the Krivoy Rog iron ore basin are discussed. The results of the study of mineral and chemical composition, assortment and content of microelements, and crystallochemistry of iron are considered. The results of pioneer experiments on thermo magnetization of the ore in order to create a scientific background for improv­ing the processing technology of different iron ore and iron aluminum materials.