This is a good site for general information about your metal such as its physical and chemical properties
This BBC extraction of metals information is a good starting point
http://www.bbc.co.uk/schools/gcsebitesize/science/aqa_pre_2011/rocks/metalsrev1.shtml
There is some information here, but be careful as the descriptions are of lab experiments and not of the industrial processes
http://www.gcsescience.com/ex.htm
This site has some general information and specific information about iron, aluminium, copper and titanium
http://www.chemguide.co.uk/inorganic/extraction/introduction.html
Some more sites that could be useful
http://www.goiit.com/posts/show/0/content-general-principles-of-extraction-of-metals-804401.htm