论文部分内容阅读
使用安德森撞击式粒径分级采样器,分别对陕西某铅锌冶炼厂熔炼备料、鼓风熔炼炉和铸铅工艺无组织颗粒物进行分级采样,并分析不同工艺各粒径段颗粒物中的铅元素含量及粒径分布特征.结果表明,不同工艺颗粒物的排放量有所不同,其中鼓风炉熔炼工艺颗粒物排放量最大,为402.83 mg·h-1,熔炼备料和铸铅工艺分别为182.71 mg·h-1和100.03 mg·h-1;各工艺段颗粒物中的铅元素含量也不相同,其中熔炼备料工艺颗粒物中铅元素质量分数为111.54 mg·kg-1,鼓风炉熔炼68.54mg·kg-1、铸铅工艺10.5 mg·kg-1;从粒径分布来看,熔炼备料和鼓风炉熔炼铅元素主要集中在粗粒径范围,而铸铅工艺在粗、细粒径段中比重相当,其中熔炼备料粗粒径铅元素占总量的质量分数为43.42%,鼓风炉熔炼占到了47.48%,铸铅工艺粗、细粒径中铅元素分别占37.14%、45.72%;熔炼备料和铸铅工艺在粗粒径和细粒径范围内均有峰值出现,而鼓风炉熔炼铅元素峰值主要出现在粗粒径段;各工艺铅元素累积频率分布曲线均符合对数正态分布.
Anderson particle size sampler was used to classify the unprocessed particulate matter in a lead-zinc smelter in Shaanxi province, blast furnace and cast lead respectively, and the lead content in different particle size fractions And particle size distribution.The results show that the emissions of different process particles are different, in which the emissions of blast furnace smelting process is the largest, 402.83 mg · h-1, 182.71 mg · h-1 And 100.03 mg · h-1, respectively. The content of lead in each process section was also different. The lead content in smelting process was 111.54 mg · kg-1, 68.54 mg · kg-1 in blast furnace, Process 10.5 mg · kg-1; From the particle size distribution point of view, smelting lead and smelting furnace blast furnace mainly concentrated in the coarse particle size range, and cast lead process in the coarse and fine particle diameter section of the same proportion, including smelting preparation coarse particles Lead content of lead accounted for 43.42% of the total, blast furnace smelting accounted for 47.48%, cast lead process crude, fine grain size of lead accounted for 37.14%, 45.72%; smelting preparation and lead casting process in the coarse diameter and Fine particle size range While the peak value of smelting lead in blast furnace mainly appeared in the coarse grain size section. The cumulative frequency distribution curve of lead in each process all accorded with the logarithm normal distribution.