About eighty percent of world Bauxite Mining Equipment, mainly from large blanket type deposits is from surface mines, while the rest are mainly from Southern Europe and Hungary, from underground excavations. On some surface deposits there is no overburden, and on others, the bauxite may be covered by 70 metres or more of rock and clay. Deposits that are hardened may require blasting in order to release the ore. Once the bauxite is loosened into manageable pieces it is generally loaded into trucks or railroad cars and transported to crushing or washing plants or to stockpiles. For the crushing adn washing processing, the major mining equipments are jaw crushers, cone crushers, sand washer, belt conveyor, vibrating screen, etc. Underground bauxite mines are used to exploit pockets or beds of deposit between layers of carbonic rock. Water in flow is a problem in most underground operations and dewatering shafts are often drilled before mining begins.
Feldspar : A rock-forming mineral, industrially important in glass and ceramic industries, pottery and enamelware, soaps, abrasives, bond for abrasive wheels, cements and concretes, insulating compositions, fertilizer, poultry grit, tarred roofing materials, and as a sizing (or filler) in textiles and paper. Albite is a Feldspar Crusher mineral and is a sodium aluminum silicate. This form of feldspar is used as a glaze in ceramics.