某铀矿石柱浸试验浸出剂的配方探讨
2020-08-24叶阳田亮尹永朋
叶阳 田亮 尹永朋



摘 要:为研究某铀矿石样品的浸出性能,进行了五组条件柱状浸出试验,柱浸试验结果表明,2号条件试验为最佳浸出方案,铀矿石样品适合用硫酸浸出,硫酸最佳质量浓度10 g·L-1,浸出液铀最大质量浓度250.86 mg·L-1,平均质量浓度为52.24 mg·L-1,铀浸出率最大可达98.36%,达到80%浸出率的最短浸出时间为16 d,在浸出一定时间后,加入氧化剂浸出液铀质量浓度呈现明显上升趋势,但上升幅度小于最大浸出质量浓度的50%。
关 键 词:铀矿石;柱浸;铀浸出率
中图分类号:TQ016.1 文献标识码: A 文章编号: 1671-0460(2020)06-1060-04
Discussion on Leaching Agent Formula for Column Leaching Test of A Uranium Ore
YE Yang, TIAN Liang, YIN Yong-peng
(Sino Shaanxi Nuclear Industry Group Geological Survey Co., Ltd., Xian Shaanxi 710100, China)
Abstract: In order to study the leaching performance of a uranium ore sample, five groups of conditional column leaching tests were carried out. The column leaching test results showed that condition 2 was the best leaching scheme, and the uranium ore sample was suitable for sulfuric acid leaching, the optimum concentration of sulfuric acid was 10 g/L, the maximum concentration of uranium in leaching solution was 250.86 mg/L, the average concentration was 52.24 mg/L, the maximum leaching rate of uranium was 98.36% , and the shortest leaching time was 16 days when the leaching rate reached 80%.The concentration of uranium in the leach solution with oxidant increased obviously, but the increase was less than 50% of the maximum leach concentration.
Key words: Uranium ore; Column leaching; Uranium leaching rate
鈾矿地浸开采是集采、选、冶于一体的地下原位采矿工艺,20世纪60年代首先在美国和前苏联得到应用。地浸采铀技术主要包括酸法地浸、碱法地浸及CO2+O2地浸等。地浸开采之前,需通过室内浸出试验获取浸出工艺参数。熊佳丽[1]等研究了硝酸铀酰干法脱硝制备氧化铀工艺研究;邢晓东[2]等研究了不同条件的酸法柱状浸出试验;刘希涛[3]等、王清良[4]等对铀矿石样品进行了酸法和碱法的搅拌浸出和柱状浸出试验;胡鄂明[5]等、张勇[6]等对低品位碳酸盐砂岩型铀矿石进行了搅拌浸出试验研究;王小波[7]等研究了不同水头压力条件下的柱状浸出试验;陈家富[8]研究了不同粒级条件下的柱状浸出试验;李兴华[9]等、李江[10]等针对难浸铀矿石,在不同条件浸出剂中添加了微生物浸铀,研究其浸出效果;张青林[11]等研究了铀矿石CO2+O2浸出方法;王海峰[12]等、王刚[13]等对铀矿床地浸开采的可行性进行了研究分析。……
