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What is the name given to a rock like bauxite which is wort mining because it contains a valuable metal?
Wiki User
∙ 15y ago
Bauxite is an ore of aluminum. Magnetite is an oreof iron. And so on...
Wiki User
∙ 15y ago
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Compare surface and subsurface mining?
Surface Miningeasier than subsurface miningdoes more damage to environmentcreates more of a messSubsurface Miningit is very dangerousyou retrieve minerals from undergroundyou have very little air underground
How did the mining accident happen in Chile?
because there was a weakness in the structure of the cooper tunnel entrance
Why opencast mining is cheaper for companies?
because opencast mining doesnt require shafts and tunnels to be built unlike other approaches such as deep mining. it is on the surface so transportation costs from underground to ground level do not exist. insurance costs for miners may be lower as there is no risk of the mine 'caving in'.
How do you minimize effects of mining?
How do you minimize the harmful effects of mining?
How is aluminum extracted from the earth and processed?
Aluminum ore is called Bauxite, which is a heterogenous mixture of aluminum hydroxide minerals (mainly gibbsite, with some boehmsite and diaspore) bound in a matrix of clay, silica, silt and other metallic hydroxides. It is usually found near the Earth's surface, and so strip-mining and pit mines are the typical methods of extraction. The production of metallic aluminum requires two steps. First the Bauxite ore has to be converted to a mineral called Alumina (aluminum oxide Al2O3), by a method called the Bayer process. In this process, the Bauxite ore is treated with hot sodium hydroxide solution (2NaOH + 3H2O), which dissolves only the Alumina from the Bauxite. The process is completed by cooling the "Bayer liquor", drying the residue, and then reheating (calcining) the residue to obtain nearly pure Alumina. Aluminum metal is obtained by electrolysis of the Alumina using the Hall process (Hall-Héroult process). The Alumina is dissolved in liquid Cryolite (Na3ALF6) at a temperature of over 1000oC, and then a low-voltage high-current electrical field is used to separate the aluminum from the oxygen and Crylolite. The voltage in a Hall cell is only 3-5 volts, but the current is typically 200,000-300,000 amperes. Because the liquid pure aluminum metal is denser than the Cryolite, the metal collects at the bottom of the cell where it can be periodically drained out and cooled. In the early 20th century, over half of the world's Bauxite was mined in Arkansas. Now the USA produces virtually no domestic Bauxite and is an importer of the ore. Nearly 50% of the Alumina used in the US in 2008 was imported from Australia. Other major sources of Bauxite and Alumina are Guinea, Jamaica, Brazil, China and India. The production of aluminum metal uses a tremendous amount of energy. The recycling of existing aluminum products is the most cost-effective way of obtaining aluminum metal for future use, being far less expensive than processing Bauxite and Alumina.
What are the advantages and disadvantages of lasers?
what are the disadvantages of bauxite mining
Is bauxite agriculture manufacturing mining forestry or fishing?
Bauxite is an ore, hence, it relates to mining.
Is bauxite a agriculture manufacturing mining forestry or fishing?
Bauxite is an ore, hence, it relates to mining.
Why are toucans dying because of aluminum cans?
because the mining of bauxite is destroying their natural habitat
What is the type of product of bauxite?
Mining
Is bauxite mining material?
Bauxite is the ore that is refined into aluminum. Yes, it is mined.
When did bauxite mining first start in France?
It first started in 1861. I had to do an assignment on bauxite :P
Can mining bauxite affect the respiratory system?
There is little evidence of significant adverse effects on respiratory health associated with bauxite mining.There is little evidence of significant adverse effects on respiratory health associated with bauxite mining.
What is surinames industri?
Suriname's main industry is bauxite mining. Suriname is one of the top 10 producers of bauxite in the world. The Aluminum Company of America subsidiary, SURALCO, has been mining bauxite in Suriname since 1916.
What are the mining products of Guyana?
gold bauxite diamonds
What Ore Does Arkansas Lead The States In Mining?
bauxite
What is Suriname's main industry?
Suriname's main industry is bauxite mining. Suriname is one of the top 10 producers of bauxite in the world. The Aluminum Company of America subsidiary, SURALCO, has been mining bauxite in Suriname since 1916.
