Recovery of Cassiterite and Topaz Minerals from an Old Metallurgical Dump, Eastern Desert of Egypt  

作　　者：Suzan Sami Ibrahim Khaled Ezzat Yassin Tawfik Refaat Boulos Ayman Aly Hagrass Suzan Sami Ibrahim;Khaled Ezzat Yassin;Tawfik Refaat Boulos;Ayman Aly Hagrass(Central Metallurgical Research and development Institute (CMRDI), Cairo, Egypt;Tabbin Institute for Metallurgical Studies (TIMS), Cairo, Egypt)

机构地区：[1]Central Metallurgical Research and development Institute (CMRDI), Cairo, Egypt [2]Tabbin Institute for Metallurgical Studies (TIMS), Cairo, Egypt

出　　处：《Journal of Minerals and Materials Characterization and Engineering》2022年第1期57-80,共24页矿物质和材料特性和工程（英文）

摘　　要：Huge amounts of tailing dumps as a result of mines’ blasting operations were impacting economic and environmental problems. Evaluation of one of these tailing dumps of the Eastern Desert of Egypt showed the presence of reasonable amount of cassiterite mineral reaching 0.199% SnO₂. The mineral cassiterite was found as finely disseminated particulates, reached to 5 microns, within varieties of quartz-feldspar-hornblende-biotite granitic formations. In the present study, the processing regime considered from the beginning the alignment between reaching cassiterite mineral liberation size, and its extreme brittleness character. Stirring ball milling technique was applied to produce <span style="white-space:nowrap;"><span style="white-space:nowrap;">&#8722;</span></span>0.51 mm product with minimum fines as possible, which was left aside for a separate study. The ground product <span style="white-space:nowrap;"><span style="white-space:nowrap;">&#8722;</span></span>0.51 + 0.074 mm was subjected to joint shaking table/dry high intensity magnetic separation techniques after splitting it into two fractions, <span style="white-space:nowrap;"><span style="white-space:nowrap;">&#8722;</span></span>0.51 + 0.21 mm and <span style="white-space:nowrap;"><span style="white-space:nowrap;">&#8722;</span></span>0.21 + 0.074 mm. Each fraction was separately subjected to “Wilfley” shaking table. At optimum conditions, a shaking table concentrate was obtained with 0.29% SnO₂ and an operational recovery reached 96.94% from a feeding contained 0.19% SnO₂. The heavies and the two middling products after shaking table were directed separately after dryness to dry high intensity magnetic separation using “Eriez” rare earth roll separator, meanwhile the light fractions were rejected. Mathematically designed experiments were applied to optimize the separation process. At optimum conditions, a final cassiterite concentrate was obtained with 11.25% SnO₂, and an operational recovery 94.08%. Huge amounts of tailing dumps as a result of mines’ blasting operations were impacting economic and environmental problems. Evaluation of one of these tailing dumps of the Eastern Desert of Egypt showed the presence of reasonable amount of cassiterite mineral reaching 0.199% SnO₂. The mineral cassiterite was found as finely disseminated particulates, reached to 5 microns, within varieties of quartz-feldspar-hornblende-biotite granitic formations. In the present study, the processing regime considered from the beginning the alignment between reaching cassiterite mineral liberation size, and its extreme brittleness character. Stirring ball milling technique was applied to produce <span style="white-space:nowrap;"><span style="white-space:nowrap;">&#8722;</span></span>0.51 mm product with minimum fines as possible, which was left aside for a separate study. The ground product <span style="white-space:nowrap;"><span style="white-space:nowrap;">&#8722;</span></span>0.51 + 0.074 mm was subjected to joint shaking table/dry high intensity magnetic separation techniques after splitting it into two fractions, <span style="white-space:nowrap;"><span style="white-space:nowrap;">&#8722;</span></span>0.51 + 0.21 mm and <span style="white-space:nowrap;"><span style="white-space:nowrap;">&#8722;</span></span>0.21 + 0.074 mm. Each fraction was separately subjected to “Wilfley” shaking table. At optimum conditions, a shaking table concentrate was obtained with 0.29% SnO₂ and an operational recovery reached 96.94% from a feeding contained 0.19% SnO₂. The heavies and the two middling products after shaking table were directed separately after dryness to dry high intensity magnetic separation using “Eriez” rare earth roll separator, meanwhile the light fractions were rejected. Mathematically designed experiments were applied to optimize the separation process. At optimum conditions, a final cassiterite concentrate was obtained with 11.25% SnO₂, and an operational recovery 94.08%.

关 键 词：CASSITERITE Shaking Table Rare Earth Roll Magnetic Separator 

分 类 号：P59[天文地球—地球化学]