Showing posts with label Tadsjikistan. Show all posts
Showing posts with label Tadsjikistan. Show all posts

Friday, May 8, 2009

The tallest dams

The tallest dams:
When you are talking about the tallest dams in the world the Nurek dam near Nurex in Tadzjikistan takes the price for the heighest dam in the world. It has a height of 300 meters. It is seen very good in google earth with the terrain elevation layer turned on:

The water behind the dam is called the Vodohranili water bassin. The impact this dam made on this water bassin can be clearly seen at the surrounding landscape:

The lighter colored strips of shoreline in the picture above highlight the tidal water level caused by the Nurek dam. The price of the second tallest dam in the world would go to the Grand dixense dam in Switzerland. This dam has a height of 285 meters. Just click on the picture below and enlarge it to see how big this structure is when you are standing at the bottom.



The third tallest dam is the Inguri dam in Georgia with a height of 272 meters:



At the water bassin behind the Inguri dam the same " tidal" stripes can be seen at the surrounding hills as at the water bassin behind the Nurek dam:



The fourth highest dam has a relatively small wide compared to the dams mentioned above but when measured by height it is still 262 meters tall. This dam is located in Italy and is called the Vaiont dam. As you can see in the picture below the dam also has a cool walkway in front it from where you can see the dazzling height of the dam itself:



The fifth highest dam in the world with a height of 261 meters is the
Tehri dam near the town of Tehri in India. This dam also has a very big spillway running next to it:


This dam is primary used as a hydro electric power plant. When it was still under construction the huge turbines that are used to generate the electricity where visible:

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Saturday, January 31, 2009

Aluminium smelters

Aluminium production:
Aluminium smelting is the process of extracting aluminium from its oxide alumina. Alumina is extracted from the ore Bauxite at an alumina refinery. The process of extracting aluminium from Alumina is an electrolytic process, so an aluminium smelter uses prodigious amounts of electricity. They tend to be located very close to large power stations, often hydro-electric ones, and near large alumina refineries where the alumina is produced. Others are situated along ports since a lot of them use imported alumina.


Largest Aluminium smelters:
Bratsk aluminium smelter is the largest producer of primary aluminium in the world. The smelter accounts for 30% of aluminium production in Russia and 4% of the world’s output. In 2007, it produced 995,000 tonnes of primary aluminium. This smelter is near the Bratks hydro elektric power station and uses a lot of the power coming from it. Russia also has the second largest smelter in the world located in Krasnoyarsk. The facility produced 989,000 tonnes of primary aluminium in 2007. The smelter accounts for 27% of aluminium production in Russia and for 3% of global output. It is located in the vicinity of the Krasnoyarsk Hydropower Plant and consumes approximately 70% of its energy. The pictures below were made in one of the Krasnoyarsk 26, 600 meters long, smelting
"halls":







With a capacity of 872.000 tons of aluminium the factory in Manama in Bahrain is the world third biggest. The Hillside Aluminium factory in Richards Bay in South Africa has a capacity of 675.00 tons of aluminium per year and is therefore currently the fourth biggest in the world:

Aluminerie Alouette is the America’s largest aluminum smelter,and ranking fifth internationally. It is located in Sept-Iles in Canada and has a capacity of 572.000 million tonnes per year:


Among the biggest in the world are also the Boyne island smelter in Australia with a capacity of 545.000 tonnes per year, this smelter in Maputo in Mozambique with a production of 530.000 tonnes per year, this one in Australia in Tomago with a capacity of 520.000 tonnes per year. And this one in Tursunzoda in Tadsjikistan with also a capacity of 520.000 tonnes per year. You might wonder why China, which is the biggest producer of aluminium in the world, doesn't have a smelter among the biggest in the world. This is because china has a lot of smelters but none of them has a capacity of more then 400.000 tonnes per year. Their biggest is situated in Qingtongxia with a production of 385.000 per year. Although this may change very soon because China is planning a huge smelter in the city of Gganhzhou. Europe's biggest is in Sunndal in Norway with a capacity of 328,800 tonnes per year:


The biggest in the US is this smelter in
Evansville in Indiana with a capacity of 309.000 tonnes per year.

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