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| High Proportion Sintering Performance of Canadian Iron Concentrate |
| PAN Jian, SHI Ben-jing, ZHU De-qing, LI Xiao-bo |
| （School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, Hunan, China） |
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Abstract The sintering performance of Canada iron concentrate and metallurgical performance of sinter product was studied, the physic-chemical properties was investigated. The results show that the sintering indexes and metallurgical performance of sinter product both get some worse with the mixing rate of concentrate increasing from 24% to 42%. The permeability resistance of sinter bed increases from 857 Pa to 1 150 Pa ,the vertical sintering speed drops to 18.38 mm/min from 21.87 mm/min, the productivity declines from 1.14 t/(m2·h)to 0.93 t/(m2·h),the tumble index falls to 64.13% from 67.47%, the anthracite solid fuel consumptions increases to 70.42 kg/t from 62.46 kg/t, meanwhile, the reduction index(RI)and the reduction degradation index RDI＞3.15 mm for sinter product drops from 82.31% and 70.71% to 78.76% and 64.41%, respectively. This kind of concentrate was bad for granulating of mixture because of its major mineral-specularite and martite whose mineral surface has poor hydrophilicity-and unreasonable size composition, meanwhile, it is hard to generate enough liquid during sintering due to its dense and smooth surface and poor sintering capability-its softening temperature is more than 1 450 ℃. Therefore, poor granulating performance of Canadian concentrate leads to worse layer permeability then cause poor sintering performance, while high softening temperature results in the tumble index decreases when the mixing rate of concentrate increases.
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Received: 18 September 2013
Published: 10 September 2014
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2014, Vol. 49 
