Journal of Northeastern University Natural Science ›› 2018, Vol. 39 ›› Issue (9): 1242-1247.DOI: 10.12068/j.issn.1005-3026.2018.09.006

• Materials & Metallurgy • Previous Articles     Next Articles

Numerical Simulation for the Influence of Cohesive Zone Shape on Distribution of Unburned Pulverized Coal in Blast Furnace

DING Zhi-min, JIANG Xin, WEI Guo, SHEN Feng-man   

  1. School of Metallurgy, Northeastern University, Shenyang 110819, China.
  • Received:2017-06-05 Revised:2017-06-05 Online:2018-09-15 Published:2018-09-12
  • Contact: SHEN Feng-man
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Abstract: In order to improve blast furnace (BF) operation and reduce the negative influence of unburned pulverized coal on BF performance, the "Euler-Euler" method was used to simulate the distribution of unburned pulverized coal in BF. The distribution of unburned pulverized coal in BF with three kinds of cohesive zone and the influence of cohesive zone shape on the distribution of unburned pulverized coal were investigated. For different cohesive zones, the total amount of unburned pulverized coal and the regional accumulation amount of unburned pulverized coal were compared. The simulation results show that the unburned pulverized coal is mainly accumulated below the cohesive zone of BF. The deadman, the region below the raceway, the cohesive area, and the top and root of the cohesive zone are the main regions where the unburned coal powder easily accumulates. The W-shape cohesive zone is the best blast furnace operation mode. The reasons are: the distribution of unburned pulverized coal in BF is relatively uniform; more pulverized coal can be accommodated under a specific differential pressure condition.

Key words: cohesive zone, blast furnace, unburned pulverized coal(UPC), numerical simulation, ironmaking

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