Mineralogy and crystal chemistry of iron in the Timan bauxite and products of their technological processing

3rd International Conference on Competitive Materials and Technology Processes

Kotova, O.^1 ; Silaev, V.^1 ; Lutoev, V.^1 ; Vakhrushev, A.^1

Institute of Geology Komi SC UB RAS, Syktyvkar, Russia^1

关键词: Aluminum production;    Geochemical features;    High quality;    Iron content;    Mining areas;    Quantitative data;    Structural impurity;    Valence state;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/123/1/012024/pdf
DOI  :  10.1088/1757-899X/123/1/012024

来源: IOP

【 摘 要 】

Mineralogical and geochemical features of two series of samples of typical bauxites from two deposits of Middle Timan mining area (Vezhayu-Vorykva and Svetlinskoe) were studied. The phase composition of ferrous bauxites generally is boehmite, hematite, ultradisperse low-ordered goethite and berthierine. In a boehmite and kaolinite structural impurity of iron to 10%, and in the iron oxidehydroxides aluminum impurity is revealed. On iron content bauxites are subdivided into three mineral types for which quantitative data on valence states of ions of iron and proportions of their distribution last on nonequivalent structural positions in hematite, goethite and berthierine are obtained. Noble metals (Ag, Au, Ir, Rh, Pd) concentrating in bauxites are revealed for the first time. Obtained data can lead to decrease of power consumption during aluminum production and high quality ceramics, to provide production of valuable iron oxide, and also to minimize the ecological harm from accumulation of bauxite wastes.