A STUDY ON PHYSICO–CHEMICAL CHARACTERIZATIONS OF RED MUD DERIVED FROM ALUMINA PROCESSING PLANT IN TANRAI, LAMDONG PROVINCE
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1.
Tuyền TN, Quyên N Đức V, Tín Đặng X, Diễm BTH. A STUDY ON PHYSICO–CHEMICAL CHARACTERIZATIONS OF RED MUD DERIVED FROM ALUMINA PROCESSING PLANT IN TANRAI, LAMDONG PROVINCE. hueuni-jns [Internet]. 2017Dec.7 [cited 2024Oct.13];126(1D):17-26. Available from: https://jos.hueuni.edu.vn/index.php/hujos-ns/article/view/4608

Abstract

In the present paper, physico-chemical characterizations including chemical composition, crystal phase composition, particle size distribution, particle morphology, physico-chemical processes during the sintering, functional groups on the surface of Tanrai red mud (Lamdong, Vietnam) were investigated. Tanrai red mud was characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF), lazer diffraction, thermogravimetry and differential scanning calorimetry (TG-DSC), scanning electron microscope (SEM), transmission electron microscope (TEM) and Fourier-transform infrared spectroscopy (FT-IR) analyses. The results showed that main crystal phases of red mud were hematite (Fe2O3), goethite (FeO(OH)) and gibbsite (Al(OH)3). The amounts of Fe2O3 (46,7%), Al2O3 (19,1%), Na2O (4,4%), TiO2 (5,9%) in red mud were rather high that were suitable for manufacturing iron and steel, unsintered bricks, sintered bricks, and recovering TiO2. High alkaline amount (pH > 11) of red mud with small particle size is a factor strongly concerning water and air polutions.

https://doi.org/10.26459/hueuni-jns.v126i1D.4608
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