·Effects of a red mud mineralogical composition versus calcination on its pozzolanicity Author links open overlay panel Shaoliang Chen a Abdul Ghani Razaqpur a b Tuanjie Wang a c Show more Hydration of Portland cement with red mud as mineral addition J Therm Anal Calorim 131 3 2017 pp 2477 2490 /s10973 017 6794 2
·The red mud s pH increases from to due to sodium hydroxide and alterations in the bauxite s mineral composition [38] [39] Bayer s technology transforms bauxite into sodium aluminate through the reaction shown in Eq 1
·The complex composition and high alkalinity of red mud would threaten ecological balance and human health in which calcium containing minerals play an important role in red mud carbonation [120] Silicate and titanate ions may strongly compete for available soluble calcium with carbonate ions affecting carbon dioxide sequestration [101
·It is a mixture of compounds originally present in the parent mineral bauxite and of compounds formed or introduced during the Bayer cycle Na K Cr V Ni Ba Cu Mn Pb Zn etc The variation in chemical composition between different RMs worldwide is high Typical values would account Fe 2 O 3 30 60wt% Al 2 O 3 10 20wt% SiO 2 3
Results indicate that high temperature calcination can change the mineral composition and microstructure of red mud and increase the surface roughness and specific surface area Hydration of portland cement with red mud as mineral addition Journal of Thermal Analysis and Calorimetry 131 2018 pp 2477 2490 /s10973 017 6794 2
·Red mud RM is a highly alkaline by product produced by the aluminium industry The total stockpile of RM in the world is evaluated to be close 4 billion tons which caused serious soil and water pollution The use of RM in masonry materials has proven to be a prospective strategy to alleviate the environmental problems caused by RM During the past
·The characteristics and composition of red mud are influenced by the source of the bauxite ore and the methods used in its production Tables 1 and 2 provide a detailed analysis of red mud s mineral and chemical components from various production methods indicating that the major constituents are CaO Al 2 O 3 Fe 2 O 3 SiO 2 TiO 2 and Na 2 O Red mud
·In this context a study by Liu et al demonstrated that red mud due to its rich mineral composition catalyzed the combustion of biomass and effectively suppressed the emissions of CO 2 CO HCN NO x and SO 2 [72] This highlights the catalytic potential of red mud offering a promising approach to mitigate harmful emissions
·Extraction of Scandium from Red Mud Mineral Processing and Extractive Metallurgy Review DOI / aluminum and titanium and the mineral composition is
·The composition recycling and potential utilisation of Bayer red mud are demonstrated in the current study It s very challenging to achieve a uniquely cost effective and environmentally sustainable technique for managing this by product The methods and techniques described to extract minerals from red mud have mainly concentrated on
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