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  • Phosphate Rock an overview ScienceDirect Topics

    Phosphate rock of 70 to 75% BPL, or as high as is reasonably obtainable, is finely ground in a ball mill and then mixed with cooled recycled phosphoric acid-gypsum slurry in a digestion tank (Figs. 10.3 and 10.4).At this stage the only reaction which occurs is between acid and any carbonates present in the rock, and between phosphates and low concentrations of sulfuric acid which may be

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  • What is phosphate and how is it used? OCP Group

    Phosphate is a sedimentary rock formed millions of years ago by the accumulation of organic matter on the ocean floor. Phosphate reserves are found in Africa, North America, Kazakhstan, the Middle East and Oceania but the world’s largest deposits are located in Morocco, which is also one of the global leaders in phosphate extraction.

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  • Phosphate rock formation and marine phosphorus

    Phosphate rocks, also referred to as phosphorites, are sedimen-tary deposits with high phosphorus (P) concentrations. These rocks are one of the primary ore sources for P (Fig. 1), which in turn is a critical and non-renewable element for fertilizer production, upon which global fertility depends. The startling limitation of phos-phate rock reserves has led to a renewed intensity of research

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  • Phosphate rock formation and marine phosphorus

    2011-08-01· Phosphate rocks, also referred to as phosphorites, are sedimentary deposits with high phosphorus (P) concentrations. These rocks are one of the primary ore sources for P (), which in turn is a critical and non-renewable element for fertilizer production, upon which global fertility depends.The startling limitation of phosphate rock reserves has led to a renewed intensity of research in

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  • Sedimentary and Igneous Phosphate Deposits: Formation

    High-grade deposits formed as a result of hydraulic concentration of phosphate grains to form granular beds with minimal gangue. The amalgamation of these beds into decameter-thick, stratiform ore zones is generally focused along the maximum flooding surface, which is a primary exploration target in upwelling-related phosphorite. In addition to P, other elements concentrated in igneous and

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  • Phosphate rock formation and marine phosphorus

    2011-08-01· Phosphate rocks, also referred to as phosphorites, are sedimentary deposits with high phosphorus (P) concentrations. These rocks are one of the primary ore sources for P (), which in turn is a critical and non-renewable element for fertilizer production, upon which global fertility depends.The startling limitation of phosphate rock reserves has led to a renewed intensity of research in

    Details >
  • Phosphate rock formation and marine phosphorus

    Phosphate rocks, also referred to as phosphorites, are sedimen-tary deposits with high phosphorus (P) concentrations. These rocks are one of the primary ore sources for P (Fig. 1), which in turn is a critical and non-renewable element for fertilizer production, upon which global fertility depends. The startling limitation of phos-phate rock reserves has led to a renewed intensity of research

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  • phosphate mineral Description, Uses, & Facts Britannica

    Phosphate mineral, any of a group of naturally occurring inorganic salts of phosphoric acid. Phosphates can be grouped as: primary phosphates that have crystallized from a liquid; secondary phosphates formed by the alteration of primary phosphates; and rock phosphates formed from phosphorous-bearing organic material.

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  • Sedimentary and Igneous Phosphate Deposits:

    High-grade deposits formed as a result of hydraulic concentration of phosphate grains to form granular beds with minimal gangue. The amalgamation of these beds into decameter-thick, stratiform ore zones is generally focused along the maximum flooding surface, which is a primary exploration target in upwelling-related phosphorite. In addition to P, other elements concentrated in igneous and

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  • Phosphate and How Florida Was Formed Prehistoric

    The phosphate rich sediments are believed to have formed from precipitation of phosphate from seawater along with the skeletons and waste products of creatures living in the seas. In the early 1800s, it was learned that phosphorus promotes growth in plants and animals. At first, bones, which contain the element phosphorus, were used as an agricultural fertilizer. Today, phosphate rock provides

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  • World Phosphate Deposits Geology for Investors

    2019-10-17· Phosphate Rock (PR) has long been an important agriculture-based commodity. Most soils are phosphate deficient, and with the majority of 3rd world countries relying on cereals which require phosphate rich environments to thrive, the need for further phosphate exploration and exploitation will continue to grow well past 2050. With the ability of phosphates to sequester heavy elements during

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  • Apatite: Its uses as a mineral and gemstone

    Phosphate rock and phosphorite are names used for sedimentary rocks that contain at least 15% to 20% phosphate on the basis of weight. The phosphorous content in these rocks is mainly derived from the presence of apatite minerals. Determining which apatite-group minerals are contained in the rock cannot be determined without laboratory testing because their particle sizes are so small. Most

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  • The phosphorus cycle — Science Learning Hub

    The phosphorus is obtained by mining deposits of rock phosphate. Locally produced sulfuric acid is used to convert the insoluble rock phosphate into a more soluble and usable form a fertiliser product called superphosphate. In New Zealand, superphosphate is made using rock imported mainly from Morocco. Adjusting the pH of the soil for efficient plant uptake of phosphate should be done

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  • Phosphorus Fertilizer: The Original and Commercial

    2018-03-12· Today, rock phosphate is the only raw material in the form of P fertilizers. There are two types of rock phosphates: igneous and sedimentary; both have the same phosphate mineral, i.e., calcium phosphate of apatite group. The general formula for pure rock phosphate is Ca10(PO4)6(X)2, where X is F−, OH− or Cl−. These minerals are called apatites. The most common rock phosphate

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  • Sedimentary Phosphate Deposits Mineral Deposit Profile F07

    consist of phosphorites (≥18% P2O5) or phosphate rocks (<18% P2O5). These rocks are bedded. They may be primary or reworked (secondary). The main ore mineral is microcrystalline francolite, commonly in form of laminae, pellets, oolites, nodules and fragments of bones or shells (Figure 1). This mineral may be also present within the rock matrix. 1 British Columbia Geological Survey, Victoria

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