Authors : Ubale S.
Page Nos : 288-289
Description :
For producing thermal energy in thermal power plants coal is combusted. Ash is a bye
product
of combustion of coal.
Two types of ash is produced 1)
bottom ash an
d
2
)
fly ash. Fly ash is light in weight
and the small size particles come out from the upper part of the chimney. The particles are collected in
ash ponds by electro static precip
itation. The fly ash mainly contains oxides of metals such as silicon,
aluminum, iron, calcium, sodium, magnesium, manganese, titanium etc. The fly ash has a good binding
property [1]. Due to this property fly ash is used in the preparation of cement, bric
ks, tiles, pavers and so
many other applications [2, 3, 4]. The researchers are working on valorization of it in environment
-
friendly and economically viable ways.Biomass ash is produced when biomass such as bagasse, soya
stalks, rice husk are used for co
mbustion in small scale thermal power plants. This ash also contains
oxides of silicon, aluminum, iron, titanium etc. BMA can be used to prepare glasses and glass ceramics
[5,6,7,8].From the study of optical properties of glasses prepared by using BMA (bio
mass ash) it was
found that the glasses are capable of absorbing UV rays[6].
