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Bariumsulfat productionBaryteswaterFiltrationFiltrationMillReduction kilnpurifiedbariumsulfidesolutionPetroleumcokesodium sulfate(solid)OxygenNatural gasBarium sulfide(BaS)purifiedsodiumsulfatesolutionAirhot gasDryingPrecipitationMillingNa 2 SO 4 -SolutionDissolutionStorage tankPurificationPacking30