Pulverised fuel ash (PFA) is a waste product of
pulverised fuel (typically coal) which is used as an energy source in power
stations.
The fuel is pulverised into a fine powder and then
mixed with heated air to be burned.
Approximately 18% of the fuel forms fine glass
spheres, the lighter of which (± 75%) are borne aloft by the combustion process.
This lighter fraction is typically extracted from
the flue gasses by cyclones and electrostatic precipitation.
Depending on the source (mining area) and the
makeup of the fuel being burned (traditional or ultramodern methods), the
components of the PFA vary considerably, but all PFA contain substantial
amounts of silicon dioxide (SiO2), both amorphous and crystalline.
The quantity of silicon dioxide and the presence of
other components in PFA determine whether a given PFA can be used in the
production of autoclaved aerated concrete (AAC).
Requirements of Flyash for AAC Blocks Manufacturing:
updating...
Comments
Post a Comment