我国进口铜精矿有害元素统计分析

摘要

对我国近年361批次、28个进口国(地区)的进口铜精矿中汞、镉、砷、铅、氟等5个有害元素含量进行了总体统计分析，使用Q-Q图进行数据正态性验证，采用自举法对原始数据样本值重复取样以获得稳健的有害元素含量代表值估计及标准偏差，同时，也对有害元素含量数据的国别分布和频率分布进行统计分析，给出了初步的风险分析建议。%Content characteristics of 5 harmful elements(mercury, cadmium, arsenic, lead and fluorine) in copper concentrate imported from 28 countries,totally 361 batches in recent years are investigated by statistical methods. Data normality was tested by Q-Q diagram and bootstrap method was introduced to acquire the representative values of harmful element content and the standard devia-tions for imported copper concentrate. At the same time, with the statistical analysis of country distribution and frequency distribution of harmful element content, preliminary risk analysis has been proposed.