Ash Content Impact Calculator

Work out ash content impact instantly with clear inputs, formula shown and shareable results.

About Ash Content Impact Calculator

Ash output is coal burnt times ash content, split between fly ash carried in the flue gas — 75-85% in pulverised coal firing — and bottom ash falling into the hopper. High-ash coal drives mill wear, precipitator loading, ash pond capacity and disposal cost, all of which scale directly with tonnage.

Formula

Ash generation

Total ash = coal burnt x ash content %; fly ash = total x fly ash share

Worked example

With the default values below, Ash Content Impact Calculator returns Total Ash Generated of 1,900.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Coal Burntminimum 0 t/day: 5,000 t/day
Ash Contentaccepts 0–80 %: 38 %
Fly Ash Share Of Total Ashaccepts 0–100 %: 80 %
Ash Disposal Costminimum 0 per tonne: 350 per tonne

Results

Total Ash Generated: 1,900.00
Fly Ash: 1,520.00
Bottom Ash: 380.00
Annual Ash Handling Cost: $242,725,000

Step by step

1Values used
2Ash generation
3Total Ash Generated= 1,900.00
4Fly Ash= 1,520.00
5Bottom Ash= 380.00
6Annual Ash Handling Cost= 242,725,000

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax or compounding frequency into account.
Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
Ash handling, storage and disposal are regulated for groundwater, air quality and structural safety of ash ponds. Confirm consent conditions and utilisation obligations.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Ash handling, storage and disposal are regulated for groundwater, air quality and structural safety of ash ponds. Confirm consent conditions and utilisation obligations.

Frequently Asked Questions

Can fly ash be sold rather than disposed of?

Yes — it is a valuable cement and concrete additive when carbon content is low. Many jurisdictions mandate utilisation targets, which turns a disposal cost into a revenue stream.

What does high ash do to plant output?

It reduces calorific value, increases mill and pulveriser load, raises erosion of boiler tubes and fan blades, and loads the precipitators. Units often have to de-rate on very high-ash coal.