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______is a naturally occurring substance with
a range of chemical composition
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A mineral deposit concentrated enough to allow economical
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Chem111 Metallurgy

QuestionAnswer
______is a naturally occurring substance with a range of chemical composition Mineral
A mineral deposit concentrated enough to allow economical Ore
the science and technology of separating metals from their ores and of compounding alloys is ____________ Metallurgy
List three metals that are usually found in an uncombined state in nature Mercury, silver, platinum, copper, gold
List three metals that are always found in a combined state in nature Lithium, sodium, magnesium, calcium
Write chemical formula for calcite/limestone CaCO3
Write chemical formula for dolomite MgCO3
Write chemical formula for fluorite CaF2
Write chemical formula for halite NaCl
Write chemical formula for corundum Al2O3
Write chemical formula for magnetite Fe3O4
Write chemical formula for beryl Be3 Al2 Si6 O18
Write chemical formula for galena PbS
Write chemical formula for epsomite MgSO4 - 7H2O
Write chemical formula for anhydrite CaSO4
Name MgCO3 magnesite
Name Na3AlF6 cryolite
Name Al2O3 corundum
Name Ag2S argentite
Name HgS cinnabar
Name ZnS sphalerite
Name SrSO4 celestite
Name PbCO3 cerussite
Name MnO2 pyrolusite
Name TiO2 rutile
Describe the main steps involved in the preparation of an ore. the desired mineral is separated from waste materials— usually clay and silicate minerals—which are collectively called the gangue
What does roasting mean in metallurgy? an ore may be roasted to drive off volatile impurities and at the same time to convert the carbonates and sulfides to the corresponding oxides, which can be reduced more conveniently to yield the pure metals
Why is roasting a major source of air pollution and acid rain? the conversion of sulfides to oxides is a major source of sulfur dioxide, a notorious air pollutant
Describe with examples the chemical and electrolytic reduction processes used in the production of metals use a more electropositive metal as a reducing agent to separate a less electropositive metal from its compound at high temperatures (Chemical) Electrolytic reduction is suitable for very electropositive metals, such as sodium, magnesium, and aluminum
Describe the main steps used to purify metals Distillation,Electrolysis,Zone Refining
Describe the extraction of iron in a blast furnace a
Briefly discuss the steelmaking process. a
Methods for separation of the ore (flotation) ore is ground and added to H2O w/oil and detergent the mix is beaten or blown to form froth. The oil wets the mineral particles which are carried to top in froth the gangue settles on bottom. froth is skimmed off, and dried to get mineral particles.
Methods for separation of the ore ( ferromagnetic metals) are strongly attracted to magnets so magnets used to separate
Created by: kc66501
 

 



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