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catalytic oxidation were involved in the process, which accounted for 98.61%. Key words: Bayer red mud; flue gas desulfurization; wet catalytic oxidation; iron catalysis Cite this article as: TAO Lei... Bayer red mud accounts for a large amount because of the relative simple process, low lost and high-quality product [5–8]. However, the Bayer red mud contains high alkali and low activity, thus......
generated from alumina production by Bayer process not only threatens the environment but also causes waste of secondary resources. High-iron-content red mud from Bayer process was employed... constituents, is the major waste material of the alkaline extraction of alumina from bauxite by Bayer process[1]. At present, about 6×107 t of red mud is discharged to the environment every year all over......
of Advanced Metallurgy, University of Science and Technology Beijing摘 要:Red mud is a bauxite residue generated during the process of alumina production. In this research, the occurrence mode of scandium in the Bayer red mud was investigated mainly by electron probe microanalysis(EPMA). The Bayer red mud used in this work is composed of 21.47 wt%hematite......
as a flocculant for red mud separation from the caustic aluminate liquor at 95 ℃. The used red mud was generated from Chinese diaspore bauxite in Bayer process of alumina production. And the changes of PATAC... separation could reform the clarification degree of supernatant aluminate liquor rather than improve red mud settling rate, especially in the strong caustic soda liquor of Bayer process. Cationic......
PENDAS S. Industrial obtaining of ceramic materials from the Bayer process red mud’s [J]. Bol Soc Esp Ceram, 1999, 38: 220-226. [11] BOTT R, LANGELOH T, HAHN J. Re-usage of dry bauxite residue [C... to DSS was 8:2, which was constant all through the preparation process. Red mud was added into the clay-DSS system at mass fractions of 1%, 3%, 5%, 7% and 9%, respectively. Clay, RM and DSS were stirred......
Recovery of alkali and alumina from Bayer red mud by the calcification–carbonation methodXiao-feng Zhu,Ting-an Zhang,Yan-xiu Wang,Guo-zhi Lü,Wei-guang ZhangKey Laboratory of Ecological Utilization of Multi-metal Intergrown Ores of the Ministry of Education, School of Materials and Metallurgy, Northeastern University摘 要:Red mud produced in the Bayer......
for comprehensive utilization of high iron red mud. Key words: Bayer digestion; reduction; hematite; magnetite; red mud 1 Introduction The annual output of alumina is estimated to be over 6×107 t nowadays... be obtained by high gradient magnetic separation [10]. This means that it is difficult to reduce the emission of red mud from current Bayer digestion (RM-C) significantly by direct beneficiation. 2......
with Kjeldahl’s microanalysis method. The settling performance achieved at different flocculant dosages was investigated with high goethite-containing red mud slurry of simulated Bayer process synthesized in laboratory. It turns out that the settling performance of high goethite-containing red mud was better with HPAM. The average settling rate of red mud in the first 5 min and the turbidity......
Materials and methods 2.1 Materials Red mud was sampled from Guangxi Pinglu Group Co. Ltd., China, which was produced from Bayer process. The chemical composition of the red mud sample is presented.../10.1007/s11771-019-4018-6. 1 Introduction Red mud is an alkaline solid waste generated in the process of alumina production [1]. Typically, 1.5–2.5 t of red mud will be produced during the production of 1 t......
Bayer liquor, hydrothermal treatment could be used to treat red mud by Bayer process. According to research results from Zhengzhou Research Institute of Chalco[6], a recycle ratio of 50%-70% of Al2O3... from about 3.0 to 10.0 due to the recovery of alumina, which is beneficial for the treatment of red mud. Key words: spent Bayer liquor; methanol; alumina; decomposition......
