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试验测定红透山铜矿尾矿样品的全硫含量和酸中和潜力(ANC),计算得到净产酸潜力NAPP和净产酸量NAG,据此分析预测酸化潜力。结果表明:红透山铜矿尾矿的NAPP和NAG分别为H2SO448.85 kg/t和22.86 kg/t,NAPP和NAG试验结果都说明该尾矿有较高的产酸潜力,产酸的主要原因是尾矿中硫含量较高。NAPP在0～135 cm的平均值为48.85 kg/t,其中0～45 cm的NAPP平均为20.71 kg/t,45～135 cm的平均值为62.92 kg/t,表明酸化主要发生在0～45 cm的风化表层。尾矿45～135 cm各层的NAPP明显大于NAG,这是由于NAPP是通过对含S量和ANC的测定,再计算尾矿的产酸量,所代表的是理论值,其值往往因为SO24-的存在而大于实际产酸量,这可能是由于表层风化层的S氧化形成SO24-在下层累积所导致的。
The total sulfur content and acid neutralization potential (ANC) of the tailings samples from Hongtoushan copper mine were determined by experiments, and the net acidogenic potential (NAPP) and net produced acidity (NAG) were calculated to predict and predict the acidification potential. The results show that the NAPP and NAG of the tailings of Hongtoushan copper mine are respectively H2SO448.85 kg / t and 22.86 kg / t. The results of NAPP and NAG tests indicate that the tailings have higher acidogenic potential and acidogenicity The reason is higher sulfur content in the tailings. The average value of NAPP at 0 ~ 135 cm was 48.85 kg / t. The average NAPP at 0 ~ 45 cm was 20.71 kg / t and the average at 45 ~ 135 cm was 62.92 kg / t, indicating that acidification occurred mainly in 0 ~ 45 cm weathering surface. The NAPP of tailings from 45 cm to 135 cm is obviously higher than that of NAG. This is because NAPP re-calculates the amount of acid produced by the tailings by measuring the content of S and ANC and represents the theoretical value. - is greater than the actual amount of acid generated, which may be due to S surface oxidation of the formation of SO24 - the accumulation of the underlying cause.