The mechanism of secondary countercurrent leaching of uranium-containing alkali slag

被引：1

作者：

Guo, Haotong ^{[1
]}

Wang, Qingliang ^{[1
,2
]}

Lei, Zhiwu ^{[1
,2
]}

Wan, Qiang ^{[3
]}

Zhu, Fangping ^{[3
]}

Hu, Fang ^{[1
,2
]}

Hu, Eming ^{[1
,2
]}

机构：

[1] Univ South China, Sch Resources Environm & Safety Engn, Hengyang, Peoples R China

[2] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Min, Hengyang, Peoples R China

[3] China Natl Nucl Corp, Jianzhong Nucl Fuel Co Ltd, Yibin, Peoples R China

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2023年 / 332卷 / 09期

关键词：

Uranium-containing alkali waste slag; Uranium; Secondary countercurrent leaching; Leaching rate; Characterization analysis; ACID; RECOVERY; EXTRACTION; WASTE; ORE;

D O I：

10.1007/s10967-023-09049-2

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

According to the difficult problem of disposal and recovery of uranium-containing waste slag, the leaching experiment was conducted by using the secondary countercurrent leaching process. The results showed that under conditions particle size of 1 mm, reaction time of 120 min, leaching temperature of 90 & DEG;C, nitric acid concentration of 429 g/L, liquid-solid ratio of 2.2:1, hydrogen peroxide dosage of 30 mL/L in primary leaching, then the temperature was switched to 130 & DEG;C during the secondary leaching. The leaching rate of uranium in alkali slag was 99.73% and the content of the uranium in insoluble slag was 0.788%.

引用

页码：3827 / 3836

页数：10