There are several types of iron ore. The most commonly mined type is Hematite, particularly in Brazil, China and Australia, where it makes up 96% of all exports. The ore itself is a deep, brownish red colour which is where the name comes from (Haima is the Greek word for blood) and has a chemical formula of Fe2O3 and is also known as Ferric Oxide.
The principal ore of aluminum is bauxite, a complex mixture of a number of aluminum hydroxides and hydrous aluminum oxides. The most common aluminum-bearing minerals in bauxite are gibbsite (AlOH3), boehmite (AlO(OH)), and diaspore (AlO(OH)).
This review first considers the mineralogy and reactivity of nickel laterites including selective leaching of various ore types (viz. limonite, smectite, saprolite).It then examines developing technologies that focus upon the following:
Iron ore pellets and Pelletizing processes. Pelletizing is a process that involves mixing very finely ground particles of iron ore fines of size less than 200 mesh with additives like bentonite and then shaping them into oval/spherical lumps of 8-16 mm in diameter by a pelletizer and hardening the balls by firing with a fuel.
B.C. MEDIUM DEVELOPMENTS. 4000 B.C. - Boiled tree-sap, called pitch, was distilled into turpentine as a paint thinner for the resin paints. Also, alcohol was fermented as a drink and as a thinner for alcohol-based paints, made from another tree-sap or grapes.
Metallic iron is virtually unknown on the surface of the Earth except as iron-nickel alloys from meteorites and very rare forms of deep mantle xenoliths.Although iron is the fourth most abundant element in the Earth's crust, comprising about 5%, the vast majority is bound in silicate or more rarely carbonate minerals.
"Every Rock Has A Story" Rocks are composed of chemical compounds naturally occurring in nature. Rocks are composed of particles ranging from microscopic grains to full sized crystals and crystal grains of different kinds of minerals, and containing many different identifiable physical characteristics.