猫岭-王家崴子金矿采矿废料的酸化潜力研究

为控制金矿开采废岩和选冶废料的酸化 ,利用净产酸量、净产酸势实验和柱淋溶实验 ,研究了猫岭 王家崴子金矿区采矿废石和尾矿的酸化情况。结果表明 ,在废石和尾矿的堆放过程中会发生酸化 ,且废石的产酸量远高于尾矿的产酸量 ,氰化尾矿的产酸量高于浮选尾矿的产酸量。但是 ,12 0天的淋溶实验表明 ,各种采选废物在短期内酸化现象不明显 ,与本区采矿废石和尾矿低的含硫量和系统中的缓冲能力及其外部环境因素有关 ,也反映了废物漫长的酸化过程。本研究结果为金矿开发废碴的环境管理和酸化控制提供了科学依据。

Study on Acid-yielding Potential of the Discarded Rocks and Tailings in Maoling Wangjiawaizi Gold Deposits

For the purpose of controlling acidation of discard rocks and tailing of mining gold deposits,the acid generating characteristic of discarded rocks and tailing in Maoling Wangjiawaizi gold deposits are studied by acid production potential test,net acid production test and column leaching experiment.The results showed that discardes rocks and tailing would produce acid during piling.The net production by discarded rocks is more than that by cyaniding tailing,the later is more than that by mill tailing.The column leaching experiment indicated that acidation of discarded rocks and tailings was not obvious,which is relative to low sulpher and buffer capacity of discarded rocks and tailings and external environmental factors, showing that weathering characteristics of sulphlde are long drawn process.Those results provided scientific basis for environmental managements and remediation on gold mining discarded rocks and tailings.