1220 Ash pit
USe around all your steam engines repair and service areas.
The ash in steam locomotives is a byproduct from burning pulverized coal in the coalburner. During combustion, mineral impurities in the coal (clay, feldspar, quartz, and shale) fuse in suspension and float out of the combustion chamber with the exhaust gases. As the fused material rises, it cools and solidifies into spherical glassy particles. The ash is then collected from the exhaust gases by electrostatic precipitators or bag filters.
The amount of residue let in the ash pan for operating coalburners is dependent on the quality of coal being burned. Anthracite and high quality bituminous left much less ash than the same quantity of lignite. Also, thee exist the issue of quality with the amount of foreign matter mixed in with the coal – the reason why firemen referred to some grades of coal as “Real Estate”. If a given locomotive was operated rom division point to division point, the ash pan would be emptied at the end of the run.
USES AND APPLICATION
Ash can be used as prime material in many cement-based products, such as poured concrete, concrete block, and brick. One of the most common uses of ash is in Portland cement concrete pavement or PCC pavement. Road construction projects using PCC can use a great deal of concrete, and substituting ash provides significant economic benefits. Ash has also been used as embankment and mine fill. Uses of coal ash include:
- Concrete production, as a substitute material for Portland cement, sand.
- Fly-ash pellets which can replace normal aggregate in concrete mixture.
- Embankments and other structural fills (usually for road construction)
- Grout and Flowable fill production
- Waste stabilization and solidification
- Cement clinker production – (as a substitute material for clay)
- Mine reclamation
- Stabilization of soft soils
- Road subbase construction
- As aggregate substitute material (e.g. for brick production)
- Mineral filler in asphaltic concrete
- Agricultural uses: soil amendment, fertilizer, cattle feeders, soil stabilization in stock feed yards, and agricultural stakes
- Loose application on rivers to melt ice
- Loose application on roads and parking lots for ice control
DISPOSAL AND ENVIRONMENTAL CONCERNS
Ash is produced when coal is burned, and environmental laws require power companies and steam locomotives to trap and properly dispose of it. Disposal presents a challenge because of the sheer amount of coal ash produced by steam locomotives and coal-fired power plants, and also because the heavy metals in coal make ash a potentially dangerous substance.
Coal is a material that’s full of harmful substances, and there are still some questions about whether heavy metals would be able to leach from concrete made with coal ash. Concerns have also been raised over whether using fly ash would expose builders to lawsuits and exempt them from insurance coverage.
In the past, fly ash produced from coal combustion was simply entrained in flue gases and dispersed into the atmosphere. This created environmental and health concerns that prompted laws that have reduced fly ash emissions to less than 1% of ash produced. Worldwide, more than 65% of fly ash produced from coal power stations is disposed of in landfills and ash ponds.
Ash that is stored or deposited outdoors can eventually leach toxic compounds into underground water aquifers. For this reason, much of the current debate around fly ash disposal revolves around creating specially lined landfills that prevent the chemical compounds from being leached into the ground water and local ecosystems.
|Dimensions||4.2 × 2.7 × .85 in|