Posted by mining | Posted in manganese | Posted on 11-01-2012
Manganese is gray-white metal with a pink tint and a very brittle but hard metallic element. His order number 25 In 1774, while heating the mineral pyrolusite (MnO2, manganese dioxide) in a charcoal fire, was discovered by Swedish scientist Johann Gahn manganese. The heat and carbon in the charcoal separated oxygen from the manganese dioxide, so that a metallic manganese residue. This chemical reaction is called a reduction reaction.
Manganese is a reactive element that easily combines with ions in water and air. Manganese in the soil is found in a number of minerals of different chemical and physical properties, but is never found as free metal in nature. The most important mineral is pyrolusite, because it is the most important ore mineral for manganese. When manganese alloyed with other metals such as aluminum, copper and antimony, is the end product is magnetic. Read the rest of this entry »