1. |
Chunks of coal are pulverized in coal mills. |
2. |
Pulverized coal is pneumatically transported and blown into the boiler. |
3. |
The pulverized coal is burned and the inorganic inclusions (tiny bits of sand and rock) melt. |
4. |
These microscopic droplets of molten rock are carried out of the firing zone by the flue gas. |
5. |
While still suspended in the air, these spherical droplets solidify and become the "finely divided powdered residue" known as fly ash. |
6. |
The fly ash is collected in hoppers or silos and tested to determine which market will best utilize that product. |
