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.
So basically you have: ballast, ties, tie plates, rail, spikes, anchors. You can have main line ballast or yard ballast. The ties are usually treated wood or concrete. The tie plates can vary depending on what the size of the rail is and what kind of tie it is. The rail is always steel, I have never seen anything different. It can however differ in size. The spikes are just spikes, but spikes are not used on concrete ties, they have a different method of holding down the rail.