1 Nirjharâs interest is to know different technology and process engineering. 2  Raw iron is found in earthâs crust, as an ore. 3  Iron ore mostly found as Fe 2 O 3 (the form of iron oxide found as the mineral hematite). 4  At present, blast furnace is most commonly used furnace to produce iron.
The weight of a railroad tie depends on their size and specifications. They can range anywhere from 100 to 300 pounds.
The heaviest type of bale is a round bale, and the lightest a square bale. Large round bales are always heavier than small squares. Large round bales of hay can weigh up to a tonne (2200 lbs), and small square bales will typically weigh around 50 to 75 lbs. Large squares can weigh around half a tonne or more (~1000 lbs).