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首页> 外文期刊>ISIJ international >Preparation of Prereduced Pellets by Pyrite Cinder Containing Nonferrous Metals with High Temperature Chloridizing-reduction Roasting Technology
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Preparation of Prereduced Pellets by Pyrite Cinder Containing Nonferrous Metals with High Temperature Chloridizing-reduction Roasting Technology

机译：含铁黄铁矿渣的高温氯化还原焙烧技术制备预还原粒料

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摘要

Pyrite cinder contains considerable amount of nonferrous metals and the iron grade of pyrite cinder is low for blast furnace burden, so processing the pyrite cinder has become a significant issue for the utilization of valuable resources and environmental protection. In this study, a technique with high temperature chloridizing-reduction roasting is presented in aim to remove nonferrous metals from iron and produce blast furnace burden with high quality. The effects of chloridizing temperature and time, chlorinating agent dosage, reduction temperature and time are investigated. The optimum process parameters are determined as follows: chloridizing at 1125°C for 10 min, CaCl_(2) dosage of 2% and reduction at 1100°C and the coal/cinder ratio of 2.5 for 40 min. Under these conditions, the compressive strength of prereduced pellets is 1147N per pellet, the metallization degree is 84.53% and the removal rates of Cu, Pb and Zn are 37.87%, 99.31% and 80.20%, respectively.
机译：硫铁矿烧渣中含有大量的有色金属，硫铁矿烧渣中铁的含量低，难以满足高炉的负荷，因此加工硫铁矿烧渣已成为利用宝贵资源和环境保护的重要课题。在这项研究中，提出了一种高温氯化还原焙烧技术，旨在从铁中去除有色金属并生产高品质的高炉炉渣。研究了氯化温度和时间，氯化剂用量，还原温度和时间的影响。确定最佳工艺参数如下：在1125°C下氯化10分钟，CaCl_（2）用量为2％，在1100°C下还原，煤/煤渣比为2.5 40分钟。在这些条件下，预还原颗粒的抗压强度为1147N /颗粒，金属化度为84.53％，Cu，Pb和Zn的去除率分别为37.87％，99.31％和80.20％。

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