中文摘要：

选择焦作两选煤厂的原煤及其洗选产品和洗煤水作为研究对象,探讨煤中砷在洗选过程中的迁移行为和分配特征.结果表明,焦作原煤中砷含量较高;在所有洗选产品中,精煤中砷的含量都得到不同程度的去除,平均脱除率为54.97％,最高脱除率高达73.19％,而洗选副产品洗矸石和煤泥中砷含量均相对富集,其富集率的平均值分别为196.29％和64.67％;两选煤厂含砷量最低的洗煤水其砷含量为0.76×10^-6,仍超过了国家规定的排放标准,因此对于煤泥的的利用和洗煤水的排放需要加以关注.

英文摘要：

The transformation behavior and distribution characteristics of arsenic in the process of coal cleaning in Jiaozuo was studied. The conclusions are as follows, the concentration of arsenic in Jiaozuo coal is relative higher; in all coal cleaning products, the concentration of ar- senic in cleaned coal is reduced in different degree, the average removal rate was 54.97%, the highest removaility is as high as 73.19%, and the concentration of arsenic in the byproduct such as coal gangue and coal slime is relatively rich, its enrichment rate averages is respectively 196.29%, 64.67%; the lowest concentration of arsenic of coal in washing water in the two prep- aration plants is 0. 76 × 10^-6 , which is still more than emissions standards stipulated by the state. Consequently, the use of coal and emission of coal washing water need more attention.