Large Volume Inorganic Chemicals - Ammonia ... - ammk-rks.net

Chapter 55.4.10 Phosphate rock selection (2)DescriptionThe production of clean gypsum requires the use of phosphate rock with low levels ofimpurities. Only limited amounts of gypsum are presently used for purposes such as buildingconstruction materials or road pavements. However, regarding size and economy, constructionmaterials, in particular indoor building products, are an area of possible further application forthe by-product gypsum. To enable use in this market, it is important that the gypsum containsonly low levels of radioactive components.Achieved environmental benefits• facilitation of the valorisation of the phosphogypsum• less potential contamination for dispersal into the environment.Cross-media effectsNone believed to be likely.Operational dataNo information provided.ApplicabilityGenerally applicable.The selection of low impurity phosphate rock is also in discussion in the context with cadmiumaccumulation in agricultural soils [49, ERM, 2001]. However, the main obstacle for valorisationof phosphogymsum is finding a market for it.EconomicsIt can be assumed that the prices for low impurity rock will increase with demand.Driving force for implementationCost benefits if the phosphogypsum can be valorised.References to literature and example plants[29, RIZA, 2000, 49, ERM, 2001]Large Volume Inorganic Chemicals – Ammonia, Acids and Fertilisers 243