Flue gas particulate matter re-purification system and purification method of steelmaking converter

The invention discloses a flue gas particulate matter re-purification system and purification method of a steelmaking converter. The re-purification system comprises the steelmaking converter, a converter primary dust removal mechanism and a first gas outer discharge pipeline, the re-purification system further comprises a gas holder and a re-purification mechanism for carrying out steam heat exchange and de-whitening and dust removal on the flue gas after dust removal of the converter primary dust removal mechanism, the gas holder, the re-purification mechanism and the first gas outer discharge pipeline are connected with an air outlet of the converter primary dust removal mechanism through a shunting gas delivery pipeline. According to the system, the flue gas (coal) gas which is not qualified and cannot be recycled and is discharged through a chimney is further purified, so that economic and efficient targets are realized. 本发明公开了一种炼钢转炉一次烟气颗粒物再净化系统及净化方法，包括炼钢转炉、转炉一次除尘机构和第一气体外排管路，所述再净化系统还包括煤气柜和对转炉一次除尘机构除尘后的烟气