【摘要】 通过对全国26个省、市、自治区采样的297个煤样中砷含量进行分析测试,从不同地质时期、不同变质程度,以及五大聚煤区等系统分析和考查我国煤中砷的分布状况.结果表明,我国煤以中、低砷含量为主,砷含量的算术平均值为6.40mg/kg,几何平均值为3.96mg/kg,显著低于捷克北波希米亚高砷煤地区煤中砷含量,与美国、英国、澳大利亚煤中砷含量相近.按照成煤地质时代,我国煤中砷含量是从第三纪到晚三叠世、中石炭世、早石炭世、早侏罗世、晚侏罗世-早白垩世、中侏罗世、晚二叠世、晚石炭世、早二叠世依次降低,在煤变质程度上,砷含量是按照褐煤、肥煤、贫煤、长焰煤、无烟煤、瘦煤、焦煤、气煤顺序依次降低,但它们对煤中砷含量并无显著影响.更多还原

【Abstract】 Tested the arsenic content of 297 coal samples which were taken from twenty six Province, municipalities and autonomous regions of China, then analyzed and saw about the distribution of arsenic in China with different geological ages, different coal ranks, different coal-cumulating areas. The results showed that the coals with moderate and low arsenic content are primary in our country. The average mean of arsenic is 6.4 mg/kg and the geometric mean of arsenic is 3.96 mg/kg. It is obviously that the arsenic content of Chinese coals is low in comparison with coal in Praha of Czechic and it is close to the arsenic contents of USA, U.K., Australia coals. Based on the coal-forming period, arsenic content decreases gradually from Tertiary through Late Triassic, Middle Carboniferous, Early Carboniferous, Early Jurassic, Late Jurassic-early Cretaceous, Middle Jurassic, Late Permian, Late Carboniferous to Early Permian. Based on the coal rank, arsenic content decreases gradually from lignite through fat coal, meager coal, longflame coal, anthracite, lean coal, coking coal to gas coal. But all of them have no notable effect on the arsenic content of coal.更多还原