Ash drawn from the burning fuel and carried by the gas flow through the kiln chamber or flues.
All solids, including cinders, ash, soot, or other partially incinerated matter, that are carried in a gas stream.
Fine particles resulting from the combustion of fossil fuels.
The ash recovered from an incinerator's air pollution control equipment.
A fine, glass-powder recovered from the gases of burning coal during the production of electricity. These micron- sized earth elements consist primarily of silica, alumina and iron. When mixed with lime and water the fly ash forms a cementitious compound with properties very similar to that of portland cement. Because of this similarity, fly ash can be used to replace a portion of cement in the concrete, providing some distinct quality advantages. The concrete is denser resulting in a tighter, smoother surface with less bleeding. Fly Ash concrete offers a distinct architectural benefit with improved textural consistency and sharper detail. Fly ash with a low LOI (carbon content) is used as a substitute for portland cement in concrete. Regulations vary from state to state, however, ASTM suggests that fly ash must not contain more than 6% unburned carbon to be used for its cementitious qualities. Otherwise, concrete companies use it as a fine aggregate in concrete block. Others use it for filling old coal mines, seaside docking areas and as a lining for hazardous waste dumps.
A fine ash from the pulverized fuel burned in power stations, used in brick-making and as a partial substitute for cement in concrete.
A byproduct produced by coal-burning power plants that contains aluminosilicate and small amounts of lime. When combined with lime in a hydrothermal (using hot water under pressure) process, cement can be produced. It is a concrete admixture. See admixture.
By-product of smoke stack emission control that may be used as a substitute for a portion of the cement in a concrete mix.
fine solid particles of ash that are carried into the air when fuel is combusted
The airborne combustion residue from burning coal or other fuels. Consists mainly of various oxides and silicates. Major sources are pulvarized coal-burning boilers.
Uncombusted particulate matter in the combustion gases resulting from the burning of coal and other material.
the highly toxic particulate matter captured from the flue gas of an incinerator by the air pollution control system.
Ash generated from industrial combustion processes such as power stations
Non-burnable residual particles from the burning process, carried by smoke, air and flue gas. When managed properly, fly ash is prevented from escaping by air pollution control devices such as scrubbers or precipitators.
The noncombustible particles in flue gas. Often used as a body feed or solidification chemical.
gas-borne solid particles resulting from the combustion of fuel and other materials.
pozolan material used as cement substitute, causes slower set times
Tiny solid-particles of ash that escape the furnace when coal is burned; removed by emissions control equipment.
Tiny solid particles of ash that escape the boiler when coal is burned; removed by pollution-control equipment.
Finely divided particles of ash entrained in gases resulting from the combustion of fuel. Approx. 6 million tons of fly ash is used each year in the U.S. in major concrete projects, such as highway construction.
a very fine coal ash which may have pozzolanic properties. See also PFA.
Fly ash is a by-product of the combustion of pulverised coal in power-generation plants. it is extracted by the dust collection system as a fine particulate residue from the combustion gases before they are discharged into the atmosphere. The use of fly ash as a supplementary cementitious material is a very effective utilisation of a waste material. Fly ash is used as a supplementary input to making clinker, as well as an addition to ground clinker, thereby replacing some of the clinker required for cement production. This has the effect of reducing the thermal energy requirements at the cement plant.
A waste product from coal-fired power stations which can be used in concrete structures as a substitute for cement. Fly ash can improve the properties of concrete, lower the cost to produce concrete and reduce the greenhouse emissions generated during the manufacture of cement.
Dust from a furnace. The term distinguishes the ash that flies from that which drops to the bottom.
A product of coal burning that makes concrete stronger.
small particles of airborne ash produced by burning fossil fuels.
Finely divided particles of ash entrained in flue gases resulting from the combustion of fuel. The ash particles consist of incompletely burned fuel and a variety of mineral constituents
Gas-borne particulate resulting from the combustion of fuels, typically fossil fuels such as coal and lignite. The ash is composed of a variety of oxides and silicates depending on the fuel and efficiency of the combustion process
An ash residue created from combustion processes. Some electrical plants create a non-toxic fly ash that can be a substitute for Portland Cement.
Particle matter from coal ash in which the particle diameter is less than 1 x 10-4 meter. This is removed from the flue gas using flue gas particulate collectors such as fabric filters and electrostatic precipitators.
Small ash particles carried in suspension in combustion products.
Ash transported through the combustion chamber by the exhaust gases and generally deposited in the boiler heat exchanger.
A pozzolanic material. Since fly ash is a byproduct of coal combustion during electrical generation, it may be inconsistent in appearance and performance. While fly ash alone does not produce concrete with the high-performance obtainable from MetaMax®, the use of fly ash in combination with MetaMax® can have synergistic benefits.
Solid material that remains after fossil fuels are combusted. This material is carried by flue gases out of the boiler and is then captured (with 99.7% efficiency at Potomac River) by the electrostatic precipitator.
A Bi-product that comes from burning coal in utility plants and is used as a mineral admixture in concrete.
Particulate matter from coal ash that exits boilers along with hot gases. Pollution control equipment (such as electrostatic precipitators) removes more than 90 per cent of the fly ash before it can be released into the atmosphere.
The finely divided residue that results from the combustion of ground or powdered coal, transported from the firebox through the boiler by flue gases.
The finely divided particles of ash suspended in gases resulting from the combustion of fuel. Electrostatic precipitators are used to remove fly ash from the gases prior to the release from a power plant's smokestack.
A type of pozzolan suspended in flue gases during coal combustion, from which it is collected. Most commonly used to replace Portland cement. Fly ash is also used for fill material, soil stabilization and waste remediation. See SCM and EcoSmart(tm).
A fine residue, left after trash is burned in an incinerator, which can be carried in the air. It can contain harmful or toxic substances such as dioxins, lead and mercury.
A type of pozzolan suspended in flue gases during coal combustion, from which it is collected. Most commonly used to replace 15%-30% of Portland cement in a mix conforming to ASTM C618 Classified as either Class F or Class C, according to the regional type of coal burnt to produce it. Fly ash is also used for fill material, soil stabilization and waste remediation.
fine airborne ash produced by burning coal or other solid fuels
A mineral admixture used in concrete to react with cement and modify or enhance the properties of concrete.
Fine airborne particulates carried out of a boiler by waste gases after the combustion of solid fuel, for example, coal, and expelled as noncombustible airborne emissions or recovered as by-products for commercial use. See aerosol, air pollution.
The fine, non-combustible particulate material derived from fossil fuel combustion that is transported out of the boiler in the flue gases and typically collected in an electrostatic precipitator for disposal or reuse.
The particulate impurities resulting from burning coal or other material.
The fine particulate matter entrained in the flue gases of a combustion power plant.
Non-combustible residual particles expelled by flue gas.
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. It is also called pulverized fuel ash. Fly ash consists of inorganic, incombustible matter present in the coal that has been fused during combustion into a glassy, amorphous structure.