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Fly Ash


Fly Ash, a byproduct derived from the combustion of coal, encompasses the finely dispersed particles that ascend with the flue gases. The ash, which accumulates at the bottom, is referred to as bottom ash. Prior to venting through the chimneys of coal-fired power plants, Fly Ash is diligently captured by electrostatic precipitators and other particle filtration equipment. When combined with bottom ash, extracted from the furnace's base, it collectively assumes the nomenclature of coal ash. The specification of Fly Ash varies significantly contingent upon the coal type in use; however, it consistently contains notable quantities of silicon dioxide and calcium oxide (CaO), both intrinsic constituents of numerous coal-bearing rock strata. Our establishment, headquartered in India, boasts a distinguished reputation as a Fly Ash Exporter, catering to diverse sectors including cement, ready mix concrete, steel, refractories, and the construction industry.

Prominent Applications of Fly Ash encompass:

1. Manufacture of Portland Pozzolanic Cement & Performance Enhancement in Ordinary Portland Cement (OPC).
2. Partial Replacement of OPC in Cement Concrete.
3. High-Volume Fly Ash Concrete.
4. Roller-Compacted Concrete, Employed in Dam and Pavement Construction.
5. Production of Ash Bricks and Other Building Materials.
6. Construction of Road Embankments, Structural Fills, and Low-Lying Area Development.
7. Utilization as a Soil Amendment in Agriculture and Wasteland Development.

Fly Ash can be categorized into two types based on the coal used:

  • Class F Fly Ash: This type results from the combustion of anthracite and bituminous coal. Class F Fly Ash typically contains lower levels of lime (usually under 15 percent) but higher proportions of silica, alumina, and iron (exceeding 70 percent).

  • Class C Fly Ash: Produced by burning lignite or sub-bituminous coal, Class C Fly Ash exhibits self-cementing properties. It often possesses a higher lime content, frequently exceeding 15 percent and sometimes reaching as high as 30 percent. This elevated CaO content contributes to the distinctive self-hardening attributes of Class C Fly Ash.​

Both Class F and Class C Fly Ash are outcomes of coal combustion in large-scale power plants. Following collection in electrostatic precipitators or baghouses, Fly Ash is transferred to substantial silos for distribution. To ensure consistency and quality, Fly Ash is classified according to precise particle size specifications when required.

Our minimum order quantity is one container, reflecting our commitment to meeting the diverse needs of our clientele.

Test Results

   Test Name                                                Test Results                        Requirements as per ASTMC618

SiO2 + Al2O3 + Fe2O3 %                           88.59                                     70 Min.

Silica as SiO2 %                                             55.93                                     N.S.

Alumina as Al2O3 %                                    25.65                                     N.S.

Iron as Fe2O3%                                              7.01                                        N.S.

Titanium as TiO2%                                       1.13                                        N.S.

Calcium as CaO %                                        4.15                                       N.S.

Magnesium as MgO %                                1.79                                        N.S.

Sodium as Na2O %                                       1.81                                       N.S.

Potassium as K2O %                                    1.09                                       N.S.

Sulphates as SO3%                                       0.205                                   Max.

Retention on 45 Micron Sieve %              13.9634                               Max.

Phosphorus as P2O5 %                               0.35                                       N.S.

Chloride as Cl %                                              Less than 0.10                  N.S.

Moisture as MOI %                                         0.22                                        N.S.

Loss on Ignition %                                          0.216                                      Max.

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