8th International Congress on Science and Technology of Ironmaking - ICSTI 2018

Gwangyang No.1 blast furnace blowed in 2013 with 6,000㎥ inner volume (first half in 2017, Po 2.36t/d/㎥, RR 488.0kg/t-p), and dry-type dedusting system is installed at that time. The introduction background is electricity cost saving through TRT power generation and reducing the amount of waste water discharge, compared with wet-type dedusting system. The dedusting system of Gwangyang No.1 BF is consisted of 18 chambers and 240 bag filters. And there is also wet-type dedusting system (bischoff scrubber) in case of emergency. Compared with No.2~5 BF, the power generation has increased and the amount of waste water discharge is 10~20%. The following issues have arisen during operation, and improvement activities are in progress. (1) [Problem] There was clogging bag filter and corrosion of TRT with dust sticking. [Solution] Prevention dust sticking by using steam heating and improving facilities (2) [Problem] Dust can not be transported by vehicle because of high temperature and smoke. [Solution] We changed the method of emitting dust and add the process of lowering the dust temperature. In result, compared with initial operation, TRT power generation (40.2→46.0kwh/t-p) and operation efficiency (ηCO 46.8→48.8%) have increased in recent. Considering the overall economic feasibility, there is an economic merit.