[bubbleshare229255]

we heated a mixture of boric acid, lead oxide and zinc oxide. We didn’t use silicon oxide as it melts at too high a temperature.

This is where iron is made from iron oxide, using carbon monoxide as a reducing agent.

You need to remember the equations for the formation of carbon dioxide, carbon monoxide, iron, and calcium silicate (slag)

There is a nice animation on the bbc history website – the basic principal is the same as it was over a hundred years ago

http://www.bbc.co.uk/history/british/victorians/launch_ani_blast_furnace.shtml

also, have a look at this from doc brown

http://www.wpbschoolhouse.btinternet.co.uk/page04/Mextract.htm#Iron

some things are not working at the moment like science in the news, vod pod videos etc. Will try to sort these out asap.