Phosphate rock is a general term used to describe natural mineral assemblages of variable composition that have a high concentration of phosphate minerals. Most of the minerals in phosphate rock belong to the apatite group. The major use of phosphate rock is in the manufacture of fertilisers, but it also provides a source of phosphorus and ...

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Phosphorite, phosphate rock or rock phosphate is a non-detrital sedimentary rock that contains high amounts of phosphate minerals.The phosphate content of phosphorite (or grade of phosphate rock) varies greatly, from 4% to 20% phosphorus pentoxide (P 2 O 5).Marketed phosphate rock is enriched ("beneficiated") to at least 28%, often more than 30% P 2 O 5.This occurs through washing, screening ...

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Phosphate rock was first mined in England in 1847 for use as a fertilizer. It was in 1881 that Captain J. Francis LeBaron, of the Army Corps of Engineers, discovered Florida's treasure in black phosphate pebbles in the Peace River. A "hard rock" phosphate reserve in …

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literature, nor could any accidents be found in which phosphate rock reacted in a hazardous manner. SECTION 11: TOXICOLOGY INFORMATION Particulate matter may irritate and damage the eyes. No toxicology information specific to phosphate rock is available. SECTION 12: ECOLOGICAL INFORMATION Environmental Impact Rating (0-4): No data available

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Phosphorous is usually mined as phosphate rock and for use in fertilizer. Phosphoric acid can also be produced as a by-product from some P-rich metal deposits.

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Phosphate Rock Statistics and Information. Phosphorus is an essential element for plant and animal nutrition. Most phosphorus is consumed as a principal component of nitrogen-phosphorus-potassium fertilizers used on food crops throughout the world. Phosphate rock minerals are the only significant global resources of phosphorus.

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Phosphate rock used for fertilizer is a major NORM due to both uranium and thorium. Phosphate is a common chemical constituent of fertilizer. It is principally mined from apatite and phosphate rocks (phosphorite) in which the concentration of phosphate has been enhanced by sedimentary, igneous, weathering, and biological processes.

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Defined as phosphate rock sold or used by producers + imports. U.S. producers stopped exporting phosphate rock in 2003. 2. Marketable phosphate rock, weighted value, all grades. 3. Defined as imports + adjustments for industry stock changes. 4. See Appendix C for resource and reserve definitions and information concerning data sources. 5

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The term phosphate rock (or phosphorite) is used to denote any rock with high phosphorus content. The largest and least expensive source of phosphorus is obtained by mining and concentrating phosphate rock from the numerous phosphate deposits of the world. Some phosphate rock is used to make calcium phosphate nutritional supplements for animals.

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Phosphate mining began in Florida in 1883 near Hawthorne in Alachua County. This hard-rock phosphate was mined in a region extending from Alachua to Citrus counties. The mining of pebble phosphate began in 1888 in central Florida and in the 1960s in Hamilton County.

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phosphorite, also called phosphate rock, rock with a high concentration of phosphates in nodular or compact masses. The phosphates may be derived from a variety of sources, including marine invertebrates that secrete shells of calcium phosphate, and the bones and excrement of vertebrates.. The thickest deposits of phosphorite form in areas characterized by carbonaceous shale and chert.

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there is a limited amount of detailed information on world phosphate rock reserves and resources available in conven­ tional scientific literature. Useful information was located on websites, in trade magazines, papers presented at conferences and in papers or reports that have limited distribution and are generally not catalogued on commercial

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Phosphate rock is the only significant commercial source of the element phosphorus. It consists of the calcium phosphate mineral apatite together with quartz, calcite, dolomite, clay, and iron oxide as the so-called gangue constituents. Phosphate rock (or phosphorite) refers to phosphate ores that have been commercially mined.

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Mineral Resource of the Month: Phosphate Rock. by U.S. Geological Survey . Wednesday, January 28, 2015. Stephen M. Jasinski, mineral commodity specialist for the U.S. Geological Survey, has compiled the following information on phosphate rock, the source …

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1Defined as phosphate rock sold or used by producers + imports. U.S. producers stopped exporting phosphate rock in 2003. 2Marketable phosphate rock, weighted value, all grades. 3Defined as imports + adjustments for industry stock changes. 4See Appendix C for resource and reserve definitions and information concerning data sources.

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