Guidelines for Management and Handling of Phosphogypsum

iii CONTENT S No Description of Item Page Number 1 Introduction 1 2 Phosphoric acid manufacturing process production scenario in phosphoric acid plants 2 3 Generation of phosphogypsum 6 4 Characteristics of phosphogypsum 6 5 Management and handling of phosphogypsum 7 6 Environmental impacts associated with phosphogypsum dumping yards


Source of sulphur An important aspect regarding phosphogypsum is its potential to solve sulphur deficiency in soils While elemental sulphur and organic sulphur must undergo microbial conversion before sulphur is made available to plant the sulphur in phosphogypsum becomes readily available for being present in sulphate form

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Phosphogypsum refers to the calcium sulfate hydrate formed as a by product of the production of fertilizer from phosphate rock It is mainly composed of gypsum CaSO 4 ·2H 2 O Although gypsum is a widely used material in the construction industry phosphogypsum is usually not used but is stored indefinitely because of its weak radioactivity The long range storage is controversial

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Phosphogypsum is a waste by product from the processing of phosphate rock in plants producing phosphoric acid and phosphate fertilizers such as superphosphate The wet chemical phosphoric acid treatment process or wet process in which phosphate ore is digested with sulfuric acid is widely used to produce phosphoric acid and calcium sulfate mainly in dihydrate form CaSO 4 · 2H 2 O

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Phosphogypsum refers to the gypsum formed as a by product of processing phosphate ore into fertilizer with sulfuric acid Phosphogypsum is radioactive due to the presence of naturally occurring and radium in the phosphate ore

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Radiological Survey of the Concentration Department in

The purpose of this research is to conduct a radiological survey of the crushing milling screening and conveyor unit of raw materials in the al Qa im fertilizer plant General Phosphate Company in order to calculate the absorbed doses of the workers in these places as well as the work hazards As the raw materials in the phosphate fertilizer industry are extracted from the ground Certainly

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