Casting Iron

Casting Iron (HM6SW)

Location: Scranton, PA 18505 Lackawanna County
Country: United States of America

N 41° 24.237', W 75° 39.774'

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The blast furnace was the heart of any iron-making establishment. Lined with heat-resistant brick, known as refractory, the stack was filled from the top with alternating layers of iron ore, anthracite and limestone.

As the raw materials worked their way down inside the stack, the heated air blast caused the coal to burn, which in turn melted the ore and limestone. the calcium in the limestone acted as a flux, which removed impurities from the melted ore and formed slag. Just below the melt zone, the furnace walls formed a funnel, which direct the flow of molten iron droplets into the hearth at the bottom. Since the molten slag was lighter, it floated above the molten iron and was tapped off first.

Putting a furnace into blast marked the beginning of another campaign. During this period, usually ten to twelve months at the Scranton Works, a furnace would be fired continuously and tapped every ten to twelve hours. Depending on the size of the furnace, an average of seven tons of iron was smelted per tap. Between campaigns a furnace was relined, the hearth rebuilt and any necessary repairs were made. Due to the number of furnaces at Scranton - five by 1854 - it was rare that production stopped entirely.
HM NumberHM6SW
Marker ConditionNo reports yet
Date Added Thursday, September 18th, 2014 at 5:45am PDT -07:00
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Locationbig map
UTM (WGS84 Datum)18T E 444590 N 4583812
Decimal Degrees41.40395000, -75.66290000
Degrees and Decimal MinutesN 41° 24.237', W 75° 39.774'
Degrees, Minutes and Seconds41° 24' 14.22" N, 75° 39' 46.44" W
Driving DirectionsGoogle Maps
Area Code(s)570
Closest Postal AddressAt or near 151 Cedar Ave, Scranton PA 18505, US
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