39. An African Project
AngloGold Ashanti
Create medical
programs improving
the quality of health for
people living in areas
near their mining
operations.
47. Underground Mining
Longwall coal mining cuts a
slice from the long wall.
Notice the safety gear that
these miners wear everyday.
48. Miner Safety
All mining companies have
extensive safety training. No
one can go underground
without it. Miners must be
certified and demonstrate
safety knowledge.
54. Processing
Minerals are different so many
different types of processing are
needed to remove them from the
rock. Following are just a few
processes.
55. Milling
This rock contains gold.
Milling is the process of
separating the desired
mineral from the
unwanted rock (called
gangue.) See if you can
find the specks of gold.
56. Concentration and Flotation
Some minerals are
separated by washing,
flotation or magnetic
separation. Here a
combination of water,
chemicals, air and
agitation make desired
mineral particles float to
the top of the bubbles.
57. Smelting
Smelting uses high heat
and chemicals to
remove base metals
and impurities from
concentrates. Smelting
furnaces can reach
temperatures above
1064° Celsius. What
would that number be in
Fahrenheit?
58. Leaching
Ariel view of a leach pad at
a copper mine in Morenci,
Arizona. These pads are the
size of several football
fields. This one is being
stacked with crushed ore.
66. Resources
AngloGold Ashanti, www.anglogold.co.za
Colorado Mining Association, www.coloradomining.org
Mining Basics, www.miningbasics.com
Minerals Education Coalition, www.MineralsEducationCoalition.org
Mining Engineering Magazine, SME, www.miningengineeringmagazine.com
National Mining Association, www.nma.org
Newmont Mining Corporation, www.newmont.com
Society of Mining, Metallurgy and Exploration, www.smenet.org
Women in Mining Education Foundation, www.womeninmining.org
U.S. Department of Agriculture, www.usda.gov
U.S. Geological Survey, www.usgs.gov
Christensen, John W. and Teri L., Global Science: Earth/Environmental
Systems Science, Kendall Hunt. Dubuque, Iowa. 7th ed. 2009