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.
In the US, rail weight varries from 80-90 lb/yd (pounds/yard) in small yards to 100-110 lb/yd on light duty track and between 130 and 141 lbs on heavy duty track. Rail of 141 lbs is the new main line standard. The Pennsylvania RR used a special 155 lb/yd rail, which was the heaviest ever rolled for mainline operations.n the US, rail weight varries from 80-90 lb/yd (pounds/yard) in small yards to 100-110 lb/yd on light duty track and between 130 and 141 lbs on heavy duty track. Rail of 141 lbs is the new main line standard. The Pennsylvania RR used a special 155 lb/yd rail, which was the heaviest ever rolled for mainline operations.