论文部分内容阅读
硝酸盐作为原地浸出采矿的氧化剂和饱和树脂淋洗剂 ,已成功地应用于国内某些铀矿山。然而残留于矿层中的NO- 3及其降解产物NO- 2 与NH+4均属环保法规严格限制的污染物。本研究通过理论分析和模拟试验、以及对模拟试验和生产现场的浸出液的对比分析 ,意在弄清NO- 3的消耗、积累和降解情况 ,为确定经济有效的环保方案提供参考和依据。研究结果表明 ,NO- 3来源于NO- 3型树脂吸附 (铀 )初期 ,其中用于氧化Fe2 +所消耗的NO- 3仅占进入浸出液系统的一部分 ,其余的则积累于矿层及浸出液中 ;NO- 3的主要降解产物是NO- 2 。
Nitrate has been successfully applied to some domestic uranium mines as an oxidant and a saturated resin eluent for in situ leaching. However, NO- 3 and its degradation products NO- 2 and NH + 4 that remain in the ore layer are all pollutants that are strictly limited by environmental regulations. Through theoretical analysis and simulation tests and comparative analysis of simulation tests and leachate on the production site, this study intends to clarify the consumption, accumulation and degradation of NO 3 and provide a reference and basis for determining a cost-effective and environmentally friendly solution. The results show that NO- 3 originates from the initial stage of NO (superscript -) adsorption on U3-type resin, in which the NO3 consumed for the oxidation of Fe2 + only accounts for a part of the system entering the leachate and the rest accumulates in the ore and leachate. The main NO-3 degradation product is NO-2.