Aluminum http://www.empirestateroofing.com/labels/aluminum 2011-12-08T17:06:07Z Joomla! 1.5 - Open Source Content Management Why Aluminum 2010-05-18T21:40:50Z 2010-05-18T21:40:50Z http://www.empirestateroofing.com/why-aluminum-roofing <p class="maincontent">Deposits of bauxite ore are mined and refined into alumina--one of the feedstocks for aluminum metal. Then alumina and electricity are combined in a cell with a molten electrolyte called cryolite. Direct current electricity... <p class="maincontent">Deposits of bauxite ore are mined and refined into alumina--one of the feedstocks for aluminum metal. Then alumina and electricity are combined in a cell with a molten electrolyte called cryolite. Direct current electricity...