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Information @ a Glance

General

  • Fly ash (also known as a coal combustion product, or CCP) is the finely divided mineral residue resulting from the combustion of powdered coal in electric generating plants.
  • Fly ash consists of inorganic, incombustible matter present in the coal that has been fused during combustion into a glassy, amorphous structure. It is also called pulverized fuel ash. 
  • Optimum reuse of fly ash can be achieved if the chemical and physical nature of the ash is known, thus allowing its end use to be engineered to the proper end state.

Production

  • The fly ash produced from the burning of pulverized coal in a coal-fired boiler is a fine-grained, powdery particulate material that is carried off in the flue gas and usually collected from the flue gas by means of electrostatic precipitators, baghouses, or mechanical collection devices such as cyclones.
  • Close to 80% of the total pulverised fuel ash are produced iduring combustion process.
  • Pneumatic conveying offers an ideal choice for dry handling of flyash.
  • Fly ash collected in dry form is of more value than when collected in wet form.

Application

  • Dry fly ash is good for pozzolanic and ceramic applications, where as bottom ash is good for use as fine aggregate. 
  • When fly ash is used as supplementary cementitious material (SCM) in the manufacture of concrete, some of the GHG emissions from cement production are avoided.
  • The allocation of emission benefits associated with the use of fly ash presents new territory for commodities trading.

Technology

  • Fly ash technology is providing relief to the overstressed resource base of soils being mined for the production of fired-bricks. This is demonstrated in the post-tsunami reconstruction project in South India.
  • Our electrostatic technology processes high carbon fly ash to make it usable in concrete. This technology has many business advantages for power plants, since it is the most flexible, cleanest, fly ash processing solution, with the longest record of proven commercial success. 

Market

  • The importance of this techno-market survey on flyash prefabrication is directly related to a number of factors which are important to our country and the rest of the world as a whole.
  • The slag-tap boiler burns pulverized coal and produces 50% slag and 50% fly ash. The cyclone boiler burns crushed coal and produces 70-80% slag and 20-30% fly ash.

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