FIELD: drying of roasted sulfur dioxide, chemical industry. SUBSTANCE: drying is carried out with the help of dispersed system having variable density, the process takes place in stream of said system. Mentioned above dispersed system comprises dispersed phase and dispersion medium, their volume ratio being 1:2-3 in central part of the stream and 1:1.5-1.9 in its peripheral part. Dispersed sulfuric acid is used as mentioned above dispersed phase, compressed air being used as said dispersion medium. Volume ratio of summary dispersed phase and sulfurous gas to be treated is maintained within 1: 100-500 ranges. EFFECT: improved efficiency of the method decreased moisture content of sulfur dioxide, decreased capacity of reaction devices, improved efficiency of the method. 1 tbl
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