Search results
Results from the WOW.Com Content Network
Whindust is a local name used in Scotland and the North of England referring to fine-grained grit or dust resulting as a by-product from the grinding and breaking of Whinstone. [ 1 ] [ 2 ] Whindust is available in several forms, washed whindust, damp whindust and whindust.
Rock dust is a pulverized rock, usually limestone, sprayed on walls inside underground coal mines to prevent coal dust explosions. The dust acts as a heat sink, keeps coal dust levels down, and also prevents the incidence of black lung disease. Rock dust has been used since the early 1900s, but technological improvements have occurred. [1]
Emery mine on Naxos Island Corundite from the Naxos emery deposits. The corundum is blue, or sapphire.Wet slab, 10 cm (3.9 in) wide. Emery, or corundite, is a dark granular rock used to make an abrasive powder.
In 1994, a new operator, Connecticut Brownstone Quarries, began a small-scale quarrying operation to provide stone for restoration of brownstone buildings. [5] The town purchased the historic quarries and 42 acres (170,000 m 2) of adjacent land in 1999 and 2000. [5] A modern-day view of Brownstone Exploration and Discovery Park.
Mineral dust is mainly constituted of the oxides (SiO 2, Al 2 O 3, FeO, Fe 2 O 3, CaO, and others) and carbonates (CaCO 3, MgCO 3) that constitute the Earth's crust.The composition of mineral dust, usually named in atmospheric sciences as mineralogy composition, is relevant for different physical and chemical processes in the atmosphere, for example, oxides with iron have an effect in the ...
Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.
Crushed stone or angular rock is a form of construction aggregate, typically produced by mining a suitable rock deposit and breaking the removed rock down to the desired size using crushers. It is distinct from naturally occurring gravel , which is produced by natural processes of weathering and erosion and typically has a more rounded shape.
The AOL.com video experience serves up the best video content from AOL and around the web, curating informative and entertaining snackable videos.