Joint-effect of blast furnace and KR on optimizing desulfurization
WANG Zhen-yang1,ZHANG Jian-liang1,LIU Zheng-jian1,ZHANG He-shun2,AN Gang2,CHENG Zheng-ming2
(1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China 2. Ironmaking Department, Shougang Jingtang Iron and Steel Co., Ltd., Tangshan 063200,Hebei, China)
Abstract:Based on the desulfurization conditions of blast furnace and KR process in Shougang Jingtang, the characteristics and economical efficiency of the double processes were analyzed, respectively. The results showed that the main source of sulfur load for blast furnace was the coke, therefore the effective measures to reduce the BF sulfur load were decreasing the coke rate or the composition of coking coal with high sulfur contents. When the sulfur content in hot metal increased from 0.01% to 0.05%, the desulfurization cost per ton iron in BF process declined sharply. However, with the increase of[w(S)]from 0.06% to 0.10%, that cost in BF process decreased slightly. The spending of desulfurization in KR process grew steadily along with the increase of[w(S).] Under the condition of 4 kg sulfur load for BF, the desulfurization cost of the double-process was the lowest when the sulfur content of hot metal[w(S)min]was 0.067%. Moreover, the[w(S)min]rose with the sulfur load of BF. When considering the purchase cost of coking coal, the low cost of the coking coal with a high sulfur content not only counteracted the cost by the increasing desulfurization assignment, but also reduced the integrated desulfurization cost of the BF and KR processes.
王振阳,张建良,刘征建,张贺顺,安 钢,程铮明. 高炉与KR双流程联动优化脱硫[J]. 钢铁, 2017, 52(2): 5-9.
WANG Zhen-yang,ZHANG Jian-liang,LIU Zheng-jian,ZHANG He-shun,AN Gang,CHENG Zheng-ming. Joint-effect of blast furnace and KR on optimizing desulfurization. Iron and Steel, 2017, 52(2): 5-9.
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