Geology Home Page physical geology historical geology
Roger Weller, geology instructor regional geology planetary gems
It is believed Iron was first
used around 4000 BC by the Egyptians and Sumerians. It is believed they
made iron from meteorites that fell from Mars. There are many different kinds of
meteorites that fall from Mars, and below are a few samples.
Materials made from this iron
were daggers, ornaments, and spear tips. During the Iron Age, iron was the
predominant metal used for weapons and tools.
Eventually, carbon was added to the iron and wrought iron
was produced with this mixture, and it had a hard steel surface, and so it was
the most favored mineral to use and was more precious than bronze.
also made from cast iron from the 15th century. This was iron and
carbon, which was melted and poured into moulds. Cast iron pots and pans are
still popular today because it is very strong and distributes heat
evenly. The same is true of cast iron heaters.
In the middle 1900s ironmaking was carried out in many parts of the world and had become the most important metal. However, the Iron Age could not last forever and eventually the Industrial Age took over and with it a way to make steel, which was harder and stronger than iron.
Using a process where an iron alloy called spiegeleisen, which contained manganese, removed the oxygen from the steel. Later, two English chemists also discovered that adding limestone to the converter would remove most of the sulfur and the phosphorus. Eventually, adding different combinations of minerals to the iron ore produced different kinds of steel, such as carbon steel, and chromium steel.
Hematite, one of the iron ores used to process steel, is the most sought after because it contains 66% iron. Pig iron, which is one of the main raw materials to make steel, comes from iron ore.
Shown below is a picture of Hematite, and pellets of iron ore waiting to be made into steel.
Heap of iron ore pellets
Intro to Iron
AIRMET- Metalworks. Fabricators of Exquisite Decorative Wrought Iron Fence, Cus…
Steel- Raw Materials, Manufacturing Processes, /quality Control, Byproducts/waste,…
Iron Ore- Wikipedia
Cast iron Stock Photos/ Pictures/ Photography, Royalty Free Images at Inmagine
Mineral Information Institute- IRON ORE