Journal of Northeastern University Natural Science ›› 2014, Vol. 35 ›› Issue (2): 245-248.DOI: 10.12068/j.issn.1005-3026.2014.02.021

• Materials & Metallurgy • Previous Articles     Next Articles

Experimental Study on Waste Heat Recovery for Metallurgical Slag Particles

LIU Junxiang, YU Qingbo, XIE Huaqing, QIN Qin   

  1. School of Materials & Metallurgy, Northeastern University, Shenyang 110819, China.
  • Received:2013-05-22 Revised:2013-05-22 Online:2014-02-15 Published:2013-11-22
  • Contact: YU Qingbo
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Abstract: In order to solve variuous problems in recovering waste heat from high temperature metallurgical slag particles by cold air, the technique that the waste heat of metallurgical slag particles is directly recovered by gravity bed waste heat boiler to produce steam was proposed. The experiment apparatus for gravity bed waste heat boiler was established. The influences of Reynolds number of water in heat exchange tubes, slag particle velocity and the initial temperature of slag particles on heat exchange were investigated. The results show that the heat exchange resistance of slag particles is about 55~100 times as much as that of water in tubes.The total heat exchange resistance is determined by heat exchange resistance of slag particles, and the Reynolds number of water in heat exchange tubes has little influence on total heat exchange coefficient and waste heat recovery rate. The heat exchange coefficient of slag and the waste heat recovery rate increase gradually with the increases in velocity and initial temperature of slag particles.

Key words: metallurgical slag particle, waste heat recovery, gravity bed waste heat boiler, heat exchange characteristics

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