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rock phosphate electric furnace

  • Chemistry - Grams Question (how many grams does it take to .

    Oct 01, 1991 · Phosphate-rock-mining wastes, processing wastes such as phosphogypsum from WPPA plants, electric-furnace slag, and phossy water (containing phosphorus) are all under review by the Environmental Protection Agency.

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  • Phosphoric Acid Manufacturing Processes Electric Furnace .

    1. Wet method uses high-ranking of phosphate rock, while electric furnace method used lower grades 2. Cost method of electric furnace to be conscious as compared with the wet method 3. Aljpson can produce byproduct of the wet method and the task of this article can be used directly 4. Wet method using sulfuric acid, which can be accessed .

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  • Environmental Impact Guidelines for New Source Non .

    NEW REFRACTORY COMPOSITIONS RESISTANT TO MOLTEN ROCK PHOSPHATE * NEW REFRACTORY COMPOSITIONS RESISTANT TO MOLTEN ROCK PHOSPHATE * Pole, Gordon R.; Beinlich, Alfred W. 1943-01-01 00:00:00 Abstract The Tennessee Valley Authority has carried out small‐scale and large‐scale studies during the past five years, directed toward the development of .

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  • Phosphoric Acid Production - Industrial Wastes

    of rock phosphate in the electric furnace, the calcium content of the rock is converted to a silicate. This calcium silicate constitutes the main bodv of the slag, which is drawn from the furnace at white heat. At first, the mo'lten slag was allowed to cool in bulk to become a blue-gray, rock-like, crystalline mass, the grinding of which was .

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  • U.S. Bureau of Mines, 1992, pp. 977-980.

    The furnace process uses heat to develop a highly purified phosphate rock inside an electric furnace to create phosphorous pentoxide. The phosphorous pentoxide is then collected and dissolved in water or a diluted solution of phosphoric acid to produce an even stronger phosphoric acid.

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  • (PDF) Phosphate Recycling in the Phosphorus Industry

    Jul 13, 2019 · In the first method, elemental phosphorus is first produced from phosphate ore, coke, and silica in an electric furnace, and then the phosphorus is burned with air to form P2O5, which is cooled and reacted with water to form orthophosphoric acid (Section 9.2.2).

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  • Phosphate rock: analysis of the phosphate rock situation .

    When phosphate rock is reduced to elemental phosphorus with coke in the electric furnace process, the uranium in the phosphate rock virtually all goes into the by- product slag. It is estimated that approximately 300 tons of uranium is potentially recoverable per year from this use of phosphate rock.

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  • Trane® 2020 Heating & Cooling Systems | AC Units & Furnaces

    The wet process takes phosphate rock through a sulfuric acid digestion. Impurities are precipitated out and after filtering, a "green phosphoric acid" is produced. This is usually used in fertilizers. To produce phosphates by the furnace process, high quality phosphate rock is heated in an electric furnace to vaporize elemental phosphorous.

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  • EPA - Identification and Description of Mineral Processing .

    Phosphate feedstock for electric phosphorus furnaces. De uitvinding heeft betrekking op fosfatisch voedings-materiaal voor een elektrische fosforoven. The present invention relates to phosphatic feed material for an electric furnace phosphorus.

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  • Legislation and quality control of phosphate rocks for .

    Sep 28, 2017 · In the electric furnace method, elemental phosphorus (P4) is burned in air to form P4O10, which is then combined with water to give H3PO4. In the wet process, the mineral phosphate rock [Ca5(PO4)3F] is combined with sulfuric acid to give H3PO4 (and HF and CaSO4). (A) Write the balanced equations for the electric furnace method.

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  • Furnace Phosphorus and Phosphoric Acid – Chemical .

    Possible alternatives to the electric phosphorus furnace, including the blast furnace and the fuel furnace, as well as other research suggestions, are discussed; from these, a fuel furnace process is .

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  • Recovery of uranium from slag from the electric furnace .

    Phosphate rock, which usually contains calcium phosphate, was first used in 1850 to make phosphorus, and following the introduction of the electric arc furnace by James Burgess Readman in 1888 (patented 1889), elemental phosphorus production switched from the bone-ash heating, to electric arc production from phosphate rock. After the depletion .

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  • Tennessee Valley Authority production. Elemental .

    The element phosphorus is manufactured from a mixture of phosphate rock (Ca3(PO4)2), sand (SiO2), and coke (C) in an electric furnace. The chemistry is complex but .

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  • Phosphorus compounds | Article about Phosphorus compounds .

    Electric arc furnace (EAF) steel slag and serpentinite were tested in columns either alone or mixed with limestone to determine their capacity to remove phosphorus (P) from a solution containing .

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  • Electric phosphate smelting furnace . - Library of Congress

    A process for making slow release phosphate fertilizer as claimed in claim 1, wherein the low grade rock phosphate ore used in step (a) is having P2O5 in the range of 14 to 17.5 percent, CaO in the range of 43 to 48 percent, MgO in the range of 10 to 12 percent, SiO2 in the range of 4 to 6

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