The dry dedusting process (LT process) for the flue gas cleaning and recovery applicated on 3×250t converters in the West Steel-making Plant of Handan Iron & Steel Group Co..The explosive ventings of electrostatic precipitator system caused during converter smelting.This paper analyzed the causes of explosive-venting and to optimize the converter process operation by effective measures. The times of explosive ventings average 2 times per month and ensured the whole line safe and stable production.