iron utilization
Do you know if man can not use iron in his life. Surely humans are not capable of making trains, submarines, motor vehicles, bridges and school buildings. So God has provided iron for human use. "and we have created iron upon which there is great power and benefit to man." (QS Al-Hadid 125) The iron material is in nature mixed with soil, silver-shaped white sand, shiny and easily corroded. iron can be distinguished as follows 1) Cast iron is a rough iron poured to make the desired goods.2) Wrought iron is iron made by refining iron melts used to make nails, bolts, c water pipes, chains, iron bars, and etc. 3) Iron steel is iron made with very little carbon content.
Iron is used for building buildings, factories, bridges, ships, rail cars, machinery, agricultural tools, weapons and so on. Iron in the form of steel has a feature, that is not easy to rust.
The iron mining areas in Indonesia are as follows: 1) Sumatra Nias Island, Iron Mountain (West Sumatera), Batu River, Pond (Jambi), Bukit Raya (South Sumatra), and Mount Rantai (Lampung). 2) Java Jampang (West Java), Cilacap, Karang Bolong (Central Java), Kediri Beach. 3) Kalimantan Sebuku Island, Sintang (West Kalimantan), Kota Waringin (Central Kalimantan). 4) Sulawesi Lake Towuti (Central Sulawesi) and Verbeek Mountains (Central Sulawesi). Tin Geologically, tin is distinguished as follows

