中国煤砷含量评价

根据聚煤盆地煤炭储量和2001年各省、市自治区煤炭产量,在全国选择代表性煤样研究砷含量.对此次煤砷含量采取3种不同评价方法,得到不同意义的全国煤砷平均含量.①将此次煤样砷算术平均含量6.43mg/kg近似认定为全国煤砷平均含量;②考虑5大聚煤区煤炭储量的权重,计算全国煤砷平均含量为5.28g/kg;③考虑2001年各、省、市自治区煤炭产量的权重,计算全国煤砷平均含量为6.03mg/kg.高砷煤因储量较小,对全国煤砷含量影响较小,可以忽略不计.3种煤砷平均含量意义不同,对于不同的研究目的,应选择不同的煤砷平均含量,这样才能更准确地反映客观真实情况.

Estimation of Arsenic Contents in Chinese Coals

In China,arsenic contents of representative coal samples,which are selected base on the reserves of coal-cumulating areas and the production of every city in 2001,were studied.Three contents of arsenic in Chinese coals can be obtained by different evaluating methods.First,the average mean of arsenic content in these coal samples can be regard as the average content of arsenic in Chinese coals and it is 6.43mg/kg;Second,weighted by the reserves of five coal-cumulating areas and the average content of arsenic in Chinese coals is 5.28mg/kg;Third,weighted by the production of 26 cities in 2001 and the average content of arsenic in Chinese coals is 6.03 mg/kg.The influence of high arsenic coal can be ignored because the reserve of it is very small.For different purposes,different average content of arsenic in Chinese coals should be selected in order to get more reasonable value.