Precipitator blast-furnace pipe

FK . 17-71 Blast- furnace pipe precipitator. Research-Cottrell, Inc.)... 

One curious result has been recorded by Howard during the progress of the test work with fumes from various furnaces it was observed that during the blow on white metal, where a conductive deposit was obtained in the pipes practically all the lead was precipitated at a temperature of 340°C. but the SO3 and the AS2O3 escaped. To precipitate the latter and obtain complete smoke clearance it was necessary to reduce the temperature to about 90°C. At a certain western lead blast-furnace plant fumes... 

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