0
What else can I help you with?
What is government doing for mining?
Nothing , they think that pockets of public are gold mines
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.
Is the vauxhall combo clutch hydraulic or cable?
mines just snapped so its definitely cable....
What can you find on earth like gemstones and gold under ground?
Try digging at mines and look near your house
In which part of its country is Mexico's gold mines located?
Most of them are located on the northern states. See related questions.
What does American mine?
it mines when you are are a American
Where in Britain can you find coal mines?
there are 4345567890876 mines in the uk
When was Missouri Mines State Historic Site created?
Missouri Mines State Historic Site was created in 1976.
Where is Colorado School of Mines?
Colorado School of Mines is located in the state of Colorado.
Which US state has the most collieries?
There are a total of fifty-two coal mines in the United States. The state with the most collieries is Wyoming which has thirteen coal mines and they are surface mines.
What does North Carolina mine for?
North Carolina mines for emeralds, rubies, and sapphires
You want info on getting your American semi legally permitted to drive on Canadian winter road in north west teritories from yellowknife to diamond mines?
yes,
Where is Colorado School of Mines located?
Colorado School of Mines is located in the state of Colorado.
Where are the Carajas Mines?
In the north of brazil just in the rainforest
What North American country is the largest producer of tungsten?
The largest producer of tungsten in North America is Canada. The country has several tungsten mines, with significant production coming from the province of British Columbia.
What is Arkansas state rock?
The state rock of Arkansas is the bauxite rock. Bauxite is an aluminum ore and was designated as the state rock in 1967. Arkansas is known for its rich deposits of bauxite, which has been an important natural resource for the state's economy.
What are the most common rocks in North Carolina?
Some of the most common rocks in North Carolina include granite, gneiss, schist, and quartzite. These rocks can be found in various regions of the state, with granite being particularly abundant in the Piedmont region.
