Pluvial percolation in pyrite-bearing coal stockpiles

Rem: Revista Escola de Minas

Danielle Andrade Pimentel²  José Aurélio Medeiros Da Luz¹ 

[1] ,UFOP Programa de Pós-Graduação em Engenharia Mineral

关键词: Acid mine drainage;    settling;    effluent treatment;    Drenagem ácida de mina;    sedimentação;    tratamento de efluente;   

DOI  :  10.1590/S0370-44672009000100014

来源: SciELO

【 摘 要 】

Acid mine drainage is a main environmental problem linked to coal and sulfide ore mining. Its treatment usually involves alkalinization and subsequent precipitation and immobilization of the dissolved species. Rainfalls over stockpiles can cause a very similar phenomenon. This work aimed to study the effluents from such a leaching process in steam-coal stockpiles Brazilian coal with a high pyrite content was used. The effluents have been chemically characterized. Effluent clarification by aggregation and settling in an attempt to simultaneously deplete heavy metal content was studied. Settling experiments were carried out with coal suspensions, in order to evaluate the efficiency of inorganic and polymeric reagents in the process.

【 授权许可】

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