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phate, a calcium phosphate ore found in deposits within the earth. Rock phosphate is usually strip mined and then pulver-ized. The resulting material is treated with sulfuric, phosphoric or nitric acid to produce various soluble phosphates that can be used as fertilizers such as monoammonium phosphates diammonium phosphates and super phosphates.
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As a mineral resource, "phosphate rock" is defined as unprocessed ore and processed concentrates that contain some form of apatite, a group of calcium phosphate minerals that is the primary source for phosphorus in phosphate fertilizers, which are vital to agriculture.
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Phosphate Beneficiation. Background. Definition of "Beneficiation": This is the second step in the mining process, after removal of the ore from the ground. Beneficiation is the technical term describing the industrial process of mechanically separating minerals from each other.
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The 2 major western phosphate rock ore deposits are located in southeastern Idaho and northeastern Utah, and the beneficiation processes used on materials from these deposits differ greatly. In general, southeastern Idaho deposits require crushing, grinding, and classification.
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In organic chemistry, phosphate or orthophosphate is an organophosphate, an ester of orthophosphoric acid of the form PO 4 RR′R″ where one or more hydrogen atoms are replaced by organic groups. An example is trimethyl phosphate, (CH 3) 3 PO 4.The term also refers to the trivalent functional group OP(O-) 3 in such esters.. Orthophosphates are especially important among the various ...
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Allen V. Barker, in Encyclopedia of Analytical Science (Third Edition), 2019 Rock phosphate. Rock phosphate is a naturally occurring ore of marine sedimentary origin. It may have a composition of 0-30-0, but the grade is noted as 0-3-0, since rock phosphate is sparingly soluble and little of the phosphorus is available to crops.
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Phosphate Ore. The need for potash and phosphate is growing in step with a swelling global population putting the mineral fertilizer industry under pressure to ensure that nutrient supply keeps up with consumption. Deflourination of phosphate (DFP), 3CaF 2 + 2H 3 PO 4 = Ca 3 (PO4) 2 + 6HF, is one process that is carried out in rotary kilns of ...
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Snow (1979) used a cationic collector, tallow amine acetate and kerosene mixtures as phosphate collectors at a pH of 7 for enrichment of carbonate rich phosphate ore. Amphoteric surfactants behaving anionic at high pH and cationic at low pH, were employed in reverse flotation of phosphate ores by Houot et al. (1985), Buttner et al. (1991 ...
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Preparing Phosphate Ore for Animal Feed Production. Phosphorus used in animal feed is first mined in the form of phosphate rock. In order to separate the phosphorus from the surrounding undesirable material, such as sand and clay, the phosphate-bearing ore must go through a beneficiation process.
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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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And as high-grade ore deposits diminish, it becomes necessary to find economic ways to process and concentrate lower-grade sources of phosphate ores, effectively upgrading them into high-grade phosphate products. However, depending on the makeup and grade of the unique ore source, some ores are more difficult to process.
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Morocco remains the largest exporter of phosphate. However, the high cost of mining and threats of war has derailed the production of phosphate in the country. Chin is a distant second with 5% of the total reserves, translating to approximately 3.1 billion tons. However, China remains the largest producer of phosphate at 138 million metric tons.
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Farmers are facing a phosphorus crisis. The solution starts with soil. A farmer spreads organic fertilizers of bone meal pellets and rock phosphate before …
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The first commercial production of phosphate rock began in England in 1847. A wide variety of techniques and equipment is used to mine and process phosphate rocks in order to beneficiate low-grade ores and remove impurities. The eighth chapter of this book deals with mining and beneficiation of phosphate ore. The principle and operating conditions of important parts of …
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The source of the problem lies in the fact that raw phosphate ore contains high concentrations of fluoride, usually between 20,000 to 40,000 parts per million (equivalent to 2 to 4% of the ore). ... Today, with the Cold War over, it is becoming clear that workers in the phosphate industry need …
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