Journal of Siberian Federal University. Engineering & Technologies / Heavy Metals as Impurities in the Bayer Production Cycle of the Aluminum Hydroxide from Sierra Leone Bauxite. Preliminary Study

Full text (.pdf)
Issue
Journal of Siberian Federal University. Engineering & Technologies. 2021 14 (2)
Authors
Dobra, Gheorghe; Iliev, Sorin; Cotet, Lucian; Boiangiu, Alina; Hulka, Iosif; Kim, Lidia; Catrina, Gina Alina; Filipescu, Laurentiu
Contact information
Dobra, Gheorghe: Alro Slatina Slatina, Romania; Iliev, Sorin: Alum Tulcea Tulcea, Romania; Cotet, Lucian: Alum Tulcea Tulcea, Romania; Boiangiu, Alina: Alum Tulcea Tulcea, Romania; ; Hulka, Iosif: Universitatea Politehnica Timisoara Timisoara, Romania; Kim, Lidia: INCD Ecoind Bucuresti, Romania; Catrina, Gina Alina: INCD Ecoind Bucuresti, Romania; Filipescu, Laurentiu: Alum Tulcea Tulcea, Romania
Keywords
aluminium hydroxide; heavy metals; occlusion; bauxite; bauxite residue; Bayer process
Abstract

This paper is reporting the data of a preliminary study on heavy metals distribution in the fluid and solid phases involved in dry and classified aluminium hydroxide production through Bayer process. For heavy metals released in the fluid phases, the main source of contamination is the bauxite through its mineralogical phases soluble or insoluble in alkaline solution. It was shown that predominant way to transfer contaminating elements in aluminium hydroxide particles is the occlusion of very fine particles coming from mineralogical phases of bauxite residue. New born mineralogical phases from bauxite residue, like poor crystallized sodalite and cancrinite, are the most active occlusion contaminants

Pages
151-165
DOI
10.17516/1999-494X-0296
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/139961

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