1.   Old methods of producing metals such as silver, bronze and iron involved the use of lead.

2.   And of course people who had metals would have an advantage over groups who did not know how to produce metal.

3.   Alumina is smelted to produce aluminum metal.

4.   Copper slipped amid expectations that mining expansion in the second half of the year will produce more metal than manufacturers and builders need.

5.   In NEW YORK, copper slipped amid expectations that mining expansion in the second half of the year will produce more metal than manufacturers and builders need.

6.   That would have allowed Pasminco to produce pure metal without producing the high-iron waste, known as jarosite.

7.   The cause was cancer, said a spokesman for the company, which produces specialty metals used in aircraft, aerospace and weapon system components.

8.   The company, which produces metals other than steel, gained on optimism that a stronger dollar will boost exports of zinc and other metals.

9.   The concentrates from the Century mine are unique, containing virtually no iron, and would enable Pasminco to produce pure metal without producing high-iron waste.

10.   The machines process the ore, ridding it of impurities and producing concentrates that can be smelted to produce metals.