Research & Development

Study on phosphorus extraction and impurity reduction technology for pretreatment of middle-low grade phosphate ore

  • Jieen Li ,
  • Binbin He ,
  • Xiushan Yang ,
  • Dehua Xu ,
  • Zhiye Zhang
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  • 1.School of Chemical Engineering,Sichuan University,Chengdu 610065,China
    2.National Engineering and Technology Research Center for Development & Utilization of Phosphorous Resources,Kunming

Received date: 2019-10-14

  Online published: 2020-04-22

Abstract

In view of the problem that middle-low grade phosphate ore can not be directly processed and the composition charac-teristics of Jinning phosphate ore in Yunnan Province,YP collectors were used to desilicate the raw ore by positive flotation,and then concentrated wet-process phosphoric acid and nitric acid were used to magnisium removal of the phosphate ore after desilication.The orthogonal experiment results showed that when nitric acid was used as pretreatment agent,the optimum conditions for magnesium removal were liquid-solid ratio of 4,pH of 2.5,temperature of 60 ℃,and reaction time of 4 h.Under these conditions,magnesium-phosphorus ratio(Mass fraction ratio of MgO to P2O5) of concentrate was 2.16% and phosphorus loss rate was 1.7%.When wet-process phosphoric acid was used as pretreatment agent,the optimum conditions for magnesium removal were pH of 2.5,liquid-solid mass ratio of 3,reaction time of 2 h and temperature of 50 ℃.The magnesium-phosphorus ratio of concentrate was 3.32%,and the phosphorus loss rate was 0.3%.At the same time,the experimental data were fitted and analyzed,and the dynamic model of the core index of dry magnesium-phosphorus ratio was obtained.The study provided a new idea and reference value for the effective utilization of high silicon middle-low grade phosphate rock in China.

Cite this article

Jieen Li , Binbin He , Xiushan Yang , Dehua Xu , Zhiye Zhang . Study on phosphorus extraction and impurity reduction technology for pretreatment of middle-low grade phosphate ore[J]. Inorganic Chemicals Industry, 2020 , 52(4) : 33 -36 . DOI: 10.11962/1006-4990.2019-0335

References

[1] 韦敏, 张凌燕, 邱杨率 , 等. 我国磷矿资源概况及选矿方法综述[J].选煤技术, 2016(4):88-92.
[2] 张雪杰, 张志业, 王辛龙 . 高镁磷矿化学脱镁过程的工艺研究[J].化工矿物与加工, 2010(2):1-3,13.
[3] 陈艳 . 贵州某中低品位高镁胶磷矿反浮选试验研究[J]. 云南冶金, 2018,47(5):32-35.
[4] 阮耀阳, 罗惠华, 张泽强 , 等. 中低品位胶磷矿常温正反浮选试验[J].化工矿物与加工, 2017(10):1-5.
[5] 李若兰, 金弢, 何海涛 , 等. 澳大利亚某硅质胶磷矿浮选试验研究[J].化工矿物与加工, 2013(10):7-11.
[6] 秦红, 陈跃, 徐伟 , 等. 甘肃某磷矿浮选试验研究[J].化工矿物与加工, 2018(10):1-9.
[7] Ruan Yaoyang, Zhang Zeqiang, Luo Huihua , et al. Ambient temper-ature flotation of sedimentary phosphate ore using cottonseed oil as a collector[J]. Minerals, 2017,7(5):65-74.
[8] 张雪杰, 张志业, 王辛龙 . 磷矿硫酸预处理过程的微孔化研究[J]. 无机盐工业, 2010,42(3):26-29.
[9] 杜军, 赵军, 李志刚 , 等. 盐酸分解中低品位磷矿的工业化应用[J]. 化肥设计, 2018,56(3):25-27.
[10] 周贵云, 陈仕纲 . 湿法磷酸生产中磷矿预处理技术的应用[J]. 磷肥与复肥, 2000,15(1):40-41.
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