| 铅锌冶炼厂不同工艺铅元素粒径分布特征 |
| 摘要点击 2378 全文点击 1312 投稿时间：2014-01-06 修订日期：2014-03-27 |
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| 中文关键词 铅锌冶炼 铅（Pb） 粒径分布 质量分数 累积频率 |
| 英文关键词 lead-zinc smelter lead (Pb) size distribution mass fraction cumulative frequency |
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| 中文摘要 |
| 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111.54mg·kg-1，鼓风炉熔炼68.54 mg·kg-1、 铸铅工艺10.5mg·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. |
| 英文摘要 |
| Using a cascade impactor(Andersen Series NVA-800), the size-segregated atmospheric particulates were collected daily and characters of lead contents and size distribution in the particles were analyzed from melting preparation, blast furnace smelting and lead-cast processes within a lead-zinc smelter in Shaanxi province. The results showed that emissions of particulate matter were different in different processes, in which the emissions of blast furnace smelting process was 402.83 mg·h-1, while melting preparation were 182.71 mg·h-1 and 100.03 mg·h-1 in lead-cast processes. Lead contents in different sizes of particles varied in different processes. The mass fraction of lead were 111.54mg·kg-1, 68.54mg·kg-1 and 10.5 mg·kg-1 in melting preparation, blast furnace smelting and lead-cast respectively. For lead's size distribution, the melting preparation and blast furnace smelting were mainly concentrated in the coarse particles, and the lead proportion in coarse and fine particles was approximately in lead-cast processes. The proportions of lead in coarse particles were 43.42% and 47.48% in melting preparation and blast furnace smelting process respectively, while the proportion of lead in coarse and fine particles was 37.14% and was 45.72% in lead-cast processes. There had peaks in both coarse and fine particles of melting preparation and lead-cast process, but the lead peak appeared only in the coarse particles of blast furnace smelting. It also indicated that the lead's cumulative frequencies of all processes were conforming to lognormal distribution. |
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