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以伊犁盆地某砂岩铀矿为研究对象,采用逐级化学提取技术定量分析了其铀的赋存形态,各赋存形态铀含量由高到低依次为:碳酸盐结合态(均值44.58%)、铁锰氧化物结合态(均值28.46%)、可交换离子态(均值12.51%)、残渣态(均值7.90%)及硫化物及有机物结合态(均值6.52%);分析证实,该铀形态分布特征有利于减少地浸成本与环境保护,活性铀(可浸出的铀形态)包括除残渣态外的其余4种铀形态,占绝对主体地位(均值92.08%),表明该砂岩铀矿可浸性良好,铀浸出率高。活性铀高的样品,其品位也高,活性铀相对较低的样品,其品位相应偏低,说明可被浸出的铀金属总量与该砂岩铀矿储量的比值应较高。因而,基于铀赋存形态分析,认为该砂岩铀矿适合采用地浸技术开采。
Taking a sandstone-type uranium deposit in Yili basin as the research object, the occurrence patterns of uranium were quantitatively analyzed by stepwise chemical extraction. The order of uranium content of each occurrence morphology was carbonate bound state (average 44.58%), (Average 28.46%), exchangeable ionic state (12.51% average), residual state (average 7.90%) and sulfide and organic matter (average 6.52%). The analysis confirmed that the uranium morphology distribution The characteristics are conducive to reducing the cost of soaking and environmental protection. The active uranium (leachable uranium morphology) includes the remaining four uranium forms except for the residue state, accounting for the absolute dominant position (92.08% of the mean value), indicating that the sandstone uranium mine is digestible Good, uranium leaching rate is high. Samples with high active uranium also have high grades and samples with relatively low active uranium, which are of relatively low grade, indicating that the ratio of total uranium metal that can be leached to that of the sandstone uranium deposit should be high. Therefore, based on the analysis of uranium occurrence patterns, it is considered that the sandstone uranium deposit is suitable for exploitation by in-leaching technology.