pyrite kiln

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• Cement kiln — Cement kilns are used for the pyroprocessing stage of manufacture of Portland and other types of hydraulic cement, in which calcium carbonate reacts with silica bearing minerals to form a mixture of calcium silicates. Over a billion tonnes of… …   Wikipedia

• Marcellus Formation — Stratigraphic range: Middle Devonian …   Wikipedia

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• Sulfur — This article is about the chemical element. For other uses, see Sulfur (disambiguation). phosphorus ← sulfur → chlorine …   Wikipedia

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• Economy of the Song Dynasty — The Song Dynasty (960 ndash;1279) of China was a period of Chinese history marked by commercial expansion, economic prosperity, and revolutionary new economic concepts. Private trade grew and a market economy began to link the coastal provinces… …   Wikipedia

• 2009 Chinese drywall controversy — The 2009 Chinese drywall controversy is a health and safety issue involving defective drywall manufactured in China and imported by the United States starting in 2001. Laboratory tests of samples for volatile chemicals have identified emissions… …   Wikipedia

• Concrete degradation — may have various causes. Concrete can be damaged by fire, aggregate expansion, sea water effects, bacterial corrosion, calcium leaching, physical damage and chemical damage (from carbonation, chlorides, sulfates and distilled water). This process …   Wikipedia

• List of alchemical substances — Alchemical studies produced a number of substances, which were later classified as particular chemical compounds or mixtures of compounds.Many of these terms were in common use into the 20th century.* Aqua Fortis nitric acid, can be formed by 2… …   Wikipedia

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• Song Yingxing — (Traditional Chinese:宋應星; Simplified Chinese:宋应星; Wade Giles: Sung Ying Hsing; 1587 1666 AD) was a Chinese scientist and encyclopedist who lived during the late Ming Dynasty (1368 1644). He was the author of an encyclopedia that covered a wide… …   Wikipedia