Iron ore is the source of primary iron for the world39;s iron and steel industries. It is therefore essential for the production of steel, which in turn is essential to maintain a strong industrial base. Almost all iron ore is used in steelmaking. Iron ore is mined in about 50 countries.
A purity greater than 90 per cent is generally necessary to achieve a minimum concrete density of 3400 kg/m 3. This can vary with different aggregate sources having varying relative densities between 4.0 and 4.3. The mineral can often be tainted with brown coloration due to iron staining.
method of transportation is an iron ore slurry pipeline. 4.1.2 Iron Ore Beneficiation Iron ore occurs naturally in a variety of forms, from sand like iron fines to solid rock masses. Crude ore, or ore mined in the natural state, seldom occurs in a pure state and requires some form of beneficiation.
Deposits with less than 30 percent iron are commercially unattractive, and, although some ores contain as much as 66 percent iron, there are many in the 5060 percent range. An ores quality is also influenced by its other constituents, which are collectively known as gangue.