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用高炉瓦斯灰和转炉污泥造块后制备了金属化球团.分析了两种尘泥的化学成分、物相组成及分布、粒度组成及堆密度等物化性质,考察了金属化处理温度、时间和原料C/O对球团金属化效果的影响.结果表明,铁氧化物、熔剂氧化物及固体碳在两者中均含量较高,分布均匀,接触良好,锌以ZnFe2O4存在于CaO、MgO混合物相中.两种尘泥堆密度均较小(<1.5g/cm3),且含较多大于1.5mm的粗颗粒.提高金属化处理温度,延长处理时间及降低原料C/O,球团的金属化率、脱锌率均增大,其中温度的影响最为显著.在C/O=1.0,金属化温度>1220℃,时间>30min时,可获得金属化率大于85%,脱锌率大于90%的金属化球团.
Metallized pellets were prepared by blast furnace gas ash and converter sludge, chemical composition, phase composition and distribution, particle size composition and bulk density of the two kinds of sludge were analyzed. Metallization temperature, Time and raw material C / O on the metallization effect of the pellets were studied.The results showed that the contents of iron oxide, flux oxide and solid carbon were higher and more evenly distributed and the contact was good, ZnFe2O4 was present in CaO, MgO mixture phase, both of which have a low bulk density (<1.5g / cm3) and contain more coarse particles larger than 1.5mm, increase the metallization temperature, prolong the processing time and reduce the raw material C / O, ball The metallization rate and dezincification rate of lumps increased, and the influence of temperature was the most significant.The metallization rate was more than 85% when C / O = 1.0, metalization temperature> 1220 ℃, time> 30min, Metallized pellets with a rate greater than 90%.