me551/geo551 geology of industrial minerals spring 2007 commodities, part 4 magnesium, perlite,...
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ME551/GEO551 Geology of Industrial Minerals
Spring 2007
Commodities, Part 4
Magnesium, Perlite, nitrogen, phosphate, potash, salt, pumice
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Schedule• NMGS Spring meeting April 13
• Final given out April 24
• commodities presentation by students on April 24
• project presentations on May 1
• final and project due May 7
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Magnesium
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Magnesium—introduction
Greek word for a district in Thessaly called Magnesia
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Magnesium—introduction
• In 1618 a farmer at Epsom in England attempted to give his cows water from a well.
• This they refused to drink because of the water's bitter taste.
• However the farmer noticed that the water seemed to heal scratches and rashes.
• The fame of Epsom salts spread.
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Magnesium—introduction
• 8th most abundant element• 2% of crust• Magnesite or magnesia• Light• silvery-white• ignites upon heating in air• 1/3 lighter than Al
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Magnesium—properties
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Magnesium—uses• flashlight photography• flares and pyrotechnics, including incendiary
bombs• improves the mechanical, fabrication, and
welding characteristics of aluminum• hydroxide (milk of magnesia), chloride, sulfate
(Epsom salts), and citrate are used in medicine• refractory purposes such as brick and liners in
furnaces and converter
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Magnesium compounds—uses
• Refractories, 69%• agricultural, chemical, construction,
environmental, and industrial applications, 31%
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Magnesium metal—uses
• constituent of aluminum-base alloys, 53%
• castings and wrought products, 30%• Desulfurization of iron and steel, 12%• reducing agent in nonferrous metals
production, 1%
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Magnesium—production
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Magnesium—production
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Magnesium—production
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Magnesium—production
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Magnesium—geology• brines, wells, and sea water
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Magnesite http://www.webmineral.com/specimens/Magnesite.shtml
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Dolomite http://209.51.193.54/minerals/...
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Brucite http://209.51.193.54/minerals/...
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Olivine http://209.51.193.54/minerals/...
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Cautions
• Magnesium metal and alloys are highly flammable in their pure form when molten, as a powder, or in ribbon form. – DO NOT USE WATER or CO2– USE CLASS D
• bright white light produced by burning magnesium can permanently damage the retinas of the eyes
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Perlite
• What is perlite?
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Perlite—introduction• Volcanic siliceous glass• rhyolite composition• commercial perlite must expand• vitreous, pearly luster• inert• 2-5% water allows it to expand similar to
popcorn above 871 degrees C• gray, white, black, but when expanded-white
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http://www.perlite.net/
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Perlite—uses
• What are the uses of perlite?
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Perlite—uses
• building construction products, 69%
• horticultural aggregate,12%
• filter aid, 8%
• fillers, 7%
• other, 4%
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Perlite—production
• New Mexico leading state
• Turkey, Greece, Italy, Russia, Australia, South Africa
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Perlite—substitutions• Diatomite
• expanded clay and shale
• pumice
• slag
• vermiculite
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Perlite—geology• Volcanic
fields
• Grants perlite quarry (U.S. Gypsum)
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Nitrogen and nitrates
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Nitrogen—introduction
• Gas
• 78.1% of the atmosphere
• essential element of life
• obtained by liquefaction and fractional distillation
• inert
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Nitrogen as ammonia—uses
• What are uses of ammonia?
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Nitrogen as ammonia—uses
• Fertilizer (Haber process), 89%– nitrogen-phosphorus-potassium (NPK) fertilizers
• nitric acid (Ostwald process)• produce plastics• synthetic fibers and resins• explosives• annealing stainless steel and other steel mill
products• numerous other chemical compounds.
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Nitrogen as gas or liquid—uses• Produce ammonia
• gas mixtures
• refrigerant both for the immersion freezing of food products and for transportation of foods
• build up pressure in wells to force crude oil upward
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Nitrogen as ammonia—production
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Nitrogen as ammonia—production
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Nitrogen as ammonia—transportation• refrigerated barge
• rail
• pipeline
• truck
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Nitrogen—geology
• Natural gas fields Texas, Oklahoma, Louisiana
• atmosphere
• ammonia produced when coal is distilled (coke ovens)
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Nitrates—geology
• Guano deposits in caves
• Chile natural sodium nitrate (unique)– caliche rich in nitrate– driest desert in world 0.04 inch/yr allowed
slow buildup of salines since the Miocene– NaCl, SO4, borates, iodine– Guggenheim process
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FORMS
• Mixed conglomerate cemented by salts rch in nitrates
• Salts filling fractures in basement rock
• Slats filling interstitial space between rock debris at the surface
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Phosphate
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Phosphate—introduction
• essential element for plant and animal nutrition
• Greek word "phosphoros" meaning "bringer of light"
• discovered in 1669 by Hennig Brand, who prepared it from urine
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Phosphate—uses• phosphoric acid and superphosphoric acid, 90%
– fertilizers – animal feed supplements
• phosphorus compounds– industrial – food-additive
• safety matches, pyrotechnics, incendiary shells, smoke bombs, tracer bullets
• pesticides• bone-ash, calcium phosphate, is used to produce fine
chinaware
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Phosphate—production
• Florida, North Carolina, Idaho, Utah
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Phosphate—substitutions
• Bone phosphate of lime
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Phosphate—geology
• Marine sedimentary deposits– phosphorites Precambrian to Recent, on
every continent– beds few cm thick of grains of
cryptocrystalline carbonate fluorapatite (collophane, francolite)
• ocean
• carbonatites
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Phosphate—mineralogy
• Apatite Ca10(PO4,CO3)6(F,OH,Cl)2
• wavellite Al3(PO4)2(OH)3.5H2O
• crandallite CaAL3(PO4)2(OH)5.H2O
• millisite ((Na, K)CaAl6(PO4)4)(OH)9.3H2O
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Phosphate—environmental considerations• Uranium is a by-product
• radioactive
• radon
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Potash
• What are the major potash minerals?
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Potash—introduction
• K not found naturally as an element
• compounds
• 7th most abundant element• end of the 19th century, potash was made
from hardwood trees
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Potassium—properties
• most reactive and electropositive of metals
• soft
• rapidly oxidizes in air
• catches fire spontaneously on water
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Potassium—forms• potassium chloride (KCl, sylvite),
• potassium sulfate (K2SO4 or sulfate of potash (SOP)), ussually manufactured
• magnesium sulfate [K2SO4C2MgSO4, langbeinite
• Muriate of potash (MOP), mixture of KCl and NaCl
• potassium nitrate (KNO3 or saltpeter)
• sodium-potassium nitrate (NaNO3 + KNO3 or Chilean saltpeter
•
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Potash—uses• What are the major use of potash?
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Potash—uses• Fertilizers• alloy of sodium and potassium (NaK) is used
as a heat-transfer medium• soap (lye)• oil-well drilling muds• metal electroplating• snow and ice melting• water softening
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Potash—uses• glass for television and computer monitor tube
production• alkaline batteries• food products• pharmaceutical preparations• photography• some fire extinguishers• animal feed supplements• catalyst for synthetic rubber manufacture
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Potash—production
• New Mexico leading state
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Potash—transportation
• Railroad
• ships
• truck
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Potash—geology
• Evaporate deposits
• brines– Great Salt Lake
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Underground operations at IMC potash mine, Carlsbad.
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Potash ore is processed by flotation, heavy media separation, dissolution-recrystallization, and washing.
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Salt
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Salt—introduction
• NaCl
• table salt
• essential to life
• salt was used as a preservative, tanning leather, stock, mining
• salt was used to preserve Egyptian mummies
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Salt—introduction
• Trade in salt was very important; salt was valuable enough to be used as currency in some areas.
• The Latin phrase "salarium argentum," "salt money," referred to part of the payment made to Roman soldiers.
http://www-geology.ucdavis.edu/~gel115/salt.html
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Salt—introduction• Greek worshippers consecrated salt in
their rituals• in the Old and New Testaments,
covenants were sealed with salt• Catholic Church used salt in purifying
rituals• Buddhist believed salt repeals evil spirits• Pueblo people worship the Salt Mother
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http://salt.org.il/frame_rel.html
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Salt and Silver Processing
• Patio process developed in 1557 in Pachuca, Hidalgo, Mexico
• silver ores crushed in arrastras to a fine slime• mixed with salt, water, copper sulfate, mercury• spread onto a patio and allowed to dry in the
sun• silver could then amalgamate with mercury
and thus be recovered
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Salt—sold by type in US
• salt in brine, 52%
• rock salt, 31%
• vacuum pan, 10%
• solar salt, 7%
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Salt—uses• chemical industry, 42%• highway deicing, 36%• distributors, 7%• industrial, 6%• agricultural, 4%• food, 3%• primary water treatment, 1% • other, 1%
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Salt—substitutions
• Calcium chloride and calcium magnesium acetate, hydrochloric acid, and potassium chloride can be substituted for salt in deicing, certain chemical processes, and food flavoring, but at a higher cost.
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Salt—production
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Pumice and pumicite
• What is pumice and pumicite?
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Pumice and pumicite—introduction• light colored, frothy volcanic rock
• lava that is full of gas
• floats on water
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Pumice—uses
• building blocks, 67%
• abrasives, concrete, horticulture, landscaping, stone-washing laundries, and other applications, 33%
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Pumice—production
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Pumice—geology
• Volcanic fields
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Las Conchas pumice quarry, Sandoval County
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http://volcanoes.usgs.gov/Products/Pglossary/pumice.html
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http://www.mineralminers.com/images/pumice/mins/pumm101.jpg
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http://volcanoes.usgs.gov/Products/Pglossary/scoria.html
• What is the difference between scoria and pumice?