Arsenic-bearing minerals identified in the ores and tailings include iron (III) oxyhydroxides, scorodite (FeAsO4·2H2O), ferric arsenates, arseniosiderite (Ca2Fe3(AsO4)3O2·3H2O), Ca-Fe arsenates, pharmacosiderite (KFe4(AsOH 4·6 7H2O–7H2O), jarosite (K2Fe6 SO4 4(OH)12) and arsenopyrite (FeAsS).
The morphology (FESEM-EDX), mineral constituent (XRD), thermal characteristics (TG-DSC) and crystal characteristics (29Si-NMR) of hydration products of AAC samples were analyzed to demonstrate the hydration characteristics of AAC products containing iron tailings effected by iron tailing content and fineness.
This study provided the theoretical foundation for the utilizing of iron tailings in AAC production.
Quicklime and iron tailings were designed as modification agent to adjust the composition and properties of high temperature steel slag.
Initially, the iron tailings and fly ash were characterized by their chemical compositions, X-ray diffraction and particle size.
This paper studies the feasibility of utilizing low-silicon iron tailings for production of eco-friendly fired bricks.
After high temperature modification with compound modifier of quicklime and iron tailings, steel slag shows the main mineral phases of C3S, C2F and MgFe2O4.
(In addition, uranium and iron tailings have been used in the past as a source of the heavy lanthanides plus yttrium and of the light lanthanides plus lanthanum, respectively).
It was also suggested that Al and Mg ions in iron tailings got into the structure of tobermorite during the hydrothermal reaction.
Charles Roche, from the Mineral Policy Institute, said the bursting of a dam containing waste known as tailings from an iron ore mine in south-east Brazil on 5 November, unleashing a torrent of sludge more than 400km downstream, was not an isolated incident.
