The importance and difficulty of iron outlet flue dust collecting technology of blast furnace were introduced,and the characteristics of iron outlet flue dust collecting technology of three main large-size blast furnaces were analyzed and compared,and trends were predicted.

The bag filter of the 5t electric furnace at Jigang Mechanical Equipment Manufacturing Factory has never operated smoothly before for the body deformation, designing default and cumulative error of the filter, which cause various of malfunctions including rotating arm breaking,bags hardshelled and low dust arrestment rate etc.

By using minute particles of SiO2 as dust,simulation research on the EAF dust collection characteristics by cold model coke bed filter was carried out: For fixed bed filter,it was found that the longitudinal distribution of static hold up at steady state can be regarded as constant for a certain gas flow rate condition.