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

Chapter 7Fluorine compounds originating from the phosphate rock. In practice, the main part of thefluorine compounds goes through the process into the fertiliser and the remaining part isreleased into the gaseous phase.The main sources for fertiliser dust are the drying and granulation drums, spherodiser and/orprilling towers, with dust also coming from the cooling drum, screens, crushers and conveyors.The optimum exhaust gas treatment to be used depends strongly on the source of the emissions,the inlet concentration of the pollutants, the availability of optimum scrubbing liquors and at theend, on the production process being used and on the grade produced.Exhaust gas treatment might include:• wet scrubbing of exhaust gases from phosphate rock digestion, see Section 7.4.9• condensation of neutralisation/evaporation vapours• combined scrubbing of exhaust gases from neutralisation/evaporation and particle formationand conditioning, see Section 7.4.10• cyclones and fabric filters for dry dedusting.Large Volume Inorganic Chemicals – Ammonia, Acids and Fertilisers 289