Study of the Chemical and Mineralogical Composition of Kindia Bauxite in the Republic of Guinea: The Case of the Saföfö Site  

作　　者：Mouctar Camara Mamadouba Aboubacar Fofana Mohamed Dubréka Sylla Alpha Madiou Diallo Aboubacar Diallo Aly Hawa Camara Sékou Traore Mouctar Camara;Mamadouba Aboubacar Fofana;Mohamed Dubréka Sylla;Alpha Madiou Diallo;Aboubacar Diallo;Aly Hawa Camara;Sékou Traore(Department of Chemical Engineering, Gamal Abdel Nasser University of Conakry, Conakry, Republic of Guinea;Department of Physics, University of NZerekore, NZerekore, Republic of Guinea;Department of Chimie, Gamal Abdel Nasser University of Conakry, Conakry, Republic of Guinea;Institut Superieure dArchitecture and lUrbanisme (ISAU), Conakry, Republic of Guinea;National Laboratory of the Geology, Department from Mines and of the Geology, Conakry, Republic of Guinea)

机构地区：[1]Department of Chemical Engineering, Gamal Abdel Nasser University of Conakry, Conakry, Republic of Guinea [2]Department of Physics, University of NZerekore, NZerekore, Republic of Guinea [3]Department of Chimie, Gamal Abdel Nasser University of Conakry, Conakry, Republic of Guinea [4]Institut Superieure dArchitecture and lUrbanisme (ISAU), Conakry, Republic of Guinea [5]National Laboratory of the Geology, Department from Mines and of the Geology, Conakry, Republic of Guinea

出　　处：《Journal of Materials Science and Chemical Engineering》2024年第10期62-71,共10页材料科学与化学工程（英文）

摘　　要：The chemical and mineralogical composition of bauxite deposits is a key factor in the profitability of refining processes. The study of bauxites from the Saföfö site has assessed variations in chemical and mineralogical composition under various conditions, as well as the optimum conditions for their exploitation. The methodologies used in this study include experimental methods for determining moisture content, chemical composition, mineralogical composition, and specific density of bauxite. The results show significant variation in moisture content among the bauxite samples, with values ranging from 2.90% to 17.80%. The silica percentages in the samples range from 1.69% to 8.14%, while alumina percentages vary from 36.81% to 54.03%. After calcination, alumina oxide percentages range from 40% to 75%. After chemical activation, alumina oxides Al2O3 range from 40% to over 50%. Gibbsite is the most abundant mineral, accounting for about 60% - 70% of the total composition of the bauxite samples. Samples A to F have bulk densities varying between approximately 3.6 and 3.9. Sample B has the highest density, around 3.9, while sample C has the lowest, at around 3.5. Bauxite mining at the Saföfö site offers significant potential for the alumina industry, provided appropriate processing methods are selected to maximize quality and profitability while minimizing environmental impact.The chemical and mineralogical composition of bauxite deposits is a key factor in the profitability of refining processes. The study of bauxites from the Saföfö site has assessed variations in chemical and mineralogical composition under various conditions, as well as the optimum conditions for their exploitation. The methodologies used in this study include experimental methods for determining moisture content, chemical composition, mineralogical composition, and specific density of bauxite. The results show significant variation in moisture content among the bauxite samples, with values ranging from 2.90% to 17.80%. The silica percentages in the samples range from 1.69% to 8.14%, while alumina percentages vary from 36.81% to 54.03%. After calcination, alumina oxide percentages range from 40% to 75%. After chemical activation, alumina oxides Al2O3 range from 40% to over 50%. Gibbsite is the most abundant mineral, accounting for about 60% - 70% of the total composition of the bauxite samples. Samples A to F have bulk densities varying between approximately 3.6 and 3.9. Sample B has the highest density, around 3.9, while sample C has the lowest, at around 3.5. Bauxite mining at the Saföfö site offers significant potential for the alumina industry, provided appropriate processing methods are selected to maximize quality and profitability while minimizing environmental impact.

关 键 词：BAUXITE Chemical Composition GUINEA Mineralogy and Saföfö 

分 类 号：TG1[金属学及工艺—金属学]