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

Chapter 66.3.3 Liquid effluents and solid wastesTable 6.7 shows the reported emission levels in liquid effluents from the production of HF. Table 6.8 shows the reported levels of solid waste.Parameter kg/tonne HF Remark ReferenceSO 42-0.7 – 20The quantity of tail gases needing treatment depends on the composition of the fluorspar.Fluoride 0.07 – 1SS 0.1 – 1A water and/or caustic absorption treatment of tail gases produces a neutralised aqueouseffluent.Neutralisation with lime, addition of coagulation agents, sedimentation, filtration[6, German UBA, 2000][22, CEFIC, 2000]Table 6.7: Reported emission levels in liquid effluents from the production of HFParameter kg/tonne HF Remark Referenceabout 3700 If not marketable as co-product disposal. The CaSO 4 contains unreacted H 2 SO 4CaSO 45 – 50CaF 2 6 – 70Solids from precipitation of SO 4 2- and F - from scrubber effluents. This amount may becombined with the main flow of anhydrite co-product[22, CEFIC, 2000]Table 6.8: Reported emission levels for solid waste from the production of HF266 Large Volume Inorganic Chemicals – Ammonia, Acids and Fertilisers