TITLE:
A Study of Ferrospheres in the Coal Fly Ash
AUTHORS:
Danzandorj Sunjidmaa, Ganbat Batdemberel, Shaikhslam Takibai
KEYWORDS:
Fly Ash, Ferrospheres, Quartz, Albite, Anorthite, Hematite
JOURNAL NAME:
Open Journal of Applied Sciences,
Vol.9 No.1,
January
18,
2019
ABSTRACT: Coal fly ash is an industrial by-product, produced from coal combustion
in thermal power plants. It is the most complex anthropogenic materials, which
consists of combination of minerals originated from different sources. Coal fly
ash and its byproduct has become an environmental concern over the World.
Therefore, there is a pressing and ongoing need to investigate the structures
and some properties of coal fly ash and develop new recycling methods for it. The amount of silica, aluminum, calcium, potassium, magnesium, sodium,
titanium and phosphorus oxides contained in power plant fly ash was determined
by X-ray flouresecence (XRF) analysis. Concentration of heavy metals in fly ash
was in sequence of Pb > Zn > Cu > Cr > Ni. As results of Scanning Electron Microscopy (SEM), except for porous
and hollow particles, large and small microspheres were observed. These
particles are classified as ferrospheres. X-ray diffraction (XRD) analysis show that fly ash consists of the following crystal phases: quartz,
albite, anorthite and hematite.