Study on migration law of heavy metals and fluorine during decomposition of phosphate rock by nitric acid
JIN Yan-ru1,2, SHI Xin1,2, WANG Xue-wen1,2, DU Ling-pan1,2, HUANG Yong-li1,2, DU Xiong-yan1,2, FU Yi-zhong1
1. Yunnan Phosphate Group Co., Ltd., Kunming 650600, China; 2. State Engineering and Technical Research Center for Development and Utilization of Phosphorus Resources, Kunming 650600, China
Abstract: The effects of reaction time,the concentration of nitric acid,liquid-solid ratio and reaction temperature on the migration law of heavy metals and fluorine in gas,liquid and solid phases are studied in the process of producing phosphoric acid by nitric acid method.Design-Expert optimization results show that the liquid-solid ratio has the greatest impact on the mobility of As,Ni and Zn,and the concentration of nitric acid has the greatest impact on the mobility of Cr,Cu,Pb and F.The mobility values of As,Cr,Cu,Ni,Pb,Zn and F are 82.51%,80.34%,80.39%,50.12%,86.88%,63.62% and 81.75%,respectively when the reaction lasts for 1.5 h,the concentration of nitric acid is 35%,the liquid-solid ratio is 12 and the reaction temperature remains at 65℃.Meanwhile,the distribution rates of heavy metals and fluorine in gas-liquid-solid phases are 0%,78.74%,21.14%,and 13.43%,86.14%,0.43%.
晋艳茹, 史鑫, 王学文, 杜令攀, 黄永丽, 杜雄雁, 符义忠. 硝酸分解磷矿过程中重金属及氟的迁移规律研究[J]. 现代化工, 2022, 42(S2): 119-126,131.
JIN Yan-ru, SHI Xin, WANG Xue-wen, DU Ling-pan, HUANG Yong-li, DU Xiong-yan, FU Yi-zhong. Study on migration law of heavy metals and fluorine during decomposition of phosphate rock by nitric acid. Modern Chemical Industry, 2022, 42(S2): 119-126,131.
[1] 贾旭宏,李军.硝酸法制备工业净化磷酸[J].无机盐工业,2015,(8):56-59.[2] 何为,唐斌,薛卫东.优化试验设计方法及数据分析[M].北京:化学工业出版社,2012.[3] Mo X,Li X,Wen J.Optimization of bioleaching of fluoride-bearing uranium ores by response surface methodology[J].Journal of Radioanalytical and Nuclear Chemistry,2019,321(1):579-590.[4] 李莉,张赛,何强,等.响应面法在试验设计与优化中的应用[J].实验室研究与探索,2015,34(8):41-45.[5] 刘伟,刘子龙,刘畅.响应曲面法优化低品位铜钼矿生物浸出工艺[J].中南大学学报(自然科学版),2021,52(9):3111-3120.[6] 杨臻昊,陈为亮,张栋,等.响应曲面法优化铜阳极泥选择性浸出砷锑工艺[J].有色金属工程,2020,10(9):41-49.[7] Peng H,Wang F,Li G,et al.Highly efficient recovery of vanadium and chromium optimized by response surface methodology[J].ACS Omega,2019,4(1):904-910.