Ores, Minerals and Metals
The mining and extraction of natural resources has played an important role throughout the history of mankind.
Mineral deposits exist worldwide. Some regions possess exceptional types or exceptionally large quantities, other regions possess very little. Economics determine whether a mineral ore deposit is valuable enough for excavation. The components needed for processing are then extracted from the mineral aggregates that have been mined.
latest news
18.-20.08.2010 Nano Korea 2010
The 8th International Nanotech Exhibition in Korea
at KINTEX (Korea International Exhibition...
22.-23.09.2010 Application Seminar (English)
„Operation and Process Control of Agitator Bead Mills“ - Selb, Germany
Various steps are necessary – mixing, grinding, etc. – for the processing of natural materials.
Additional information and machine recommendations can be found on the following pages:
Metals
In addition to gold and silver, platinum metals such as mercury and rhenium are also counted among the classical precious metals. At room temperature in air, these elements either do not corrode at all or do so extremely slowly and to a very slight degree. Although the quantities of gold and silver in the Earth's crust are small, their existence has been known since ancient times.
Hard metals are used extensively for mounting tools and parts for machining, chipless profiling and abradant attrition. Considered as composite materials, this materials group is characterized by its metallic nature and the particular combination of the properties hardness and toughness.
Calcium carbonate (CaCO3), which occurs primarily in the form of the minerals calcite and aragonite, is one of the most prevalent compounds on Earth. Calcium carbonate is not only the main component of marble, limestone and dolomite, it is also found in bones and teeth as well as the exoskeleton of crustaceans, coral, muscles, snails and protozoa.
The matt white lustrous mineral talc (magnesium silicate hydroxide) with the chemical composition [Mg3(OH)2(Si2O5)2] is one of the phyllosilicates and has a Mohs hardness of 1. Talc has many varied applications and is used, for example, as a finely-ground filler in the paper and pulp industry, the paint and dye industry as well as the rubber, plastics and ceramics industries.
In addition to diamond and fullerene, graphite is the third modification of carbon. The metallic gray mineral occurs frequently in nature, usually crystallizes in the hexagonal crystal system and has a layer structure. This crystal structure results in material characteristics that make graphite of interest for many applications.
print page
to top
back