Sentences with phrase «of alumina from»

Century purchases nearly all of its alumina from Glencore.

Not exact matches

The residue, also known as red mud, is what's left over after extracting the alumina from the bauxite and can include small amounts of toxic metals like arsenic and lead.

The practice is common in aluminum production, where the smelting process uses vast amounts of electricity to create aluminum metal from alumina.

LONDON / BEIJING Multiple shipments of alumina are being exported from China, with major suppliers agreeing deals of up to 500,000 tonnes, in a rare move prompted by supply problems after U.S. sanctions on Russian producer Rusal.

From 2000 to 2003, Mr. Deripaska was the General Director of Russian Aluminium, which was set up as a result of the combination of the aluminium smelters and alumina refineries of Sibirsky Aluminium and Sibneft Oil Company.

Usually, to produce this type of alumina it would have to come from bauxite ore, which is mined in countries such as West Africa, the West Indies and Australia, causing huge environmental damage.

And it shows that simple oxide materials like alumina can trigger carbon - carbon bond formation from methanol derivatives, thus opening new avenues for the upgrading of methanol into long chain hydrocarbons.»

The diamonds were then coated with a thin layer of alumina to prevent the hydrogen from diffusing into their crystal structure and embrittling them.

However, many of the aerosols scientists have suggested using, such as diamond dust or alumina, are harmful to the ozone (a layer that protects the Earth's surface from some of the sun's ultraviolet rays) and human health.

Still, given the limited amount of alumina that could be required, it's far from certain such a health risk would be a genuine concern.

But these arguments are a far cry from claims that contrails are really «chemtrails,» that thousands of commercial planes aren't «merely» emitting massive amounts of CO2 but, for example, are deliberately spraying alumina.