摘要
锌冶炼是我国大气汞排放的重要来源之一。锌精矿中的汞浓度是准确估算锌冶炼大气汞排放的一个关键参数。通过在铅锌冶炼厂和铅锌矿选矿厂采集全国各地的208个锌精矿样品,并测定了其汞浓度。研究发现,我国不同矿山锌精矿汞浓度存在较大差异,在0.07~2534.06g·t-1之间变化,算术均值和几何均值分别为:158.66g·t-1和9.45g·t-1。陕西、甘肃两省锌精矿汞浓度最高,分别达到233.07g·t-1和499.91g·t-1,16省锌精矿汞浓度的加权平均值为73.22g·t-1。以82个矿山锌精矿汞浓度的算术平均均值、几何平均值和各省锌精矿汞浓度加权平均值计算得到的锌冶炼大气汞排放因子分别为76.89g·t-1、4.58g·t-1和35.45g·t-1。
Zinc smelting is one of the important mercury emission sources in China.Mercury concentration of zinc concentrate is the key parameter to accurately calculate the mercury emissions from zinc smelting.280 zinc concentrate samples from zinc smelters and lead-zinc concentration plants were collected,and their mercury concentration were determined.The results indicated that the mercury concentrations in the zinc concentrate from different mines vary from 0.07 to 2 534.06 g·t-1,the arithmetic and geometric mean value are 158.66 g·t-1 and 9.45 g·t-1.Zinc concentrates from Shaanxi and Gansu provinces with the highest mercury concentrations,which are 233.07 g·t-1 and 499.91 g·t-1 respectively,the weighted mean of mercury concentration of the 16 provinces is 73.22 g·t-1.Adopting the mercury concentrations of the arithmetic,geometric mean of 82 mines and the weighted mean of 16 provinces we can calculate the emission factors of zinc smelting are 76.89 g·t-1,4.58 g·t-1 and 35.45 g·t-1 respectively.
基金
国家环保公益性行业科研专项项目(200909024)
关键词
环境工程学
浓度分布
样品采集
锌精矿
汞
environmental engineering
concentration distribution
sampling
zinc concentrate
mercury