无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2020, Vol. 52 ›› Issue (4): 33-36.doi: 10.11962/1006-4990.2019-0335

• 研究与开发 • 上一篇    下一篇

中低品位磷矿预处理提磷降杂技术研究

李杰恩1,何宾宾2,杨秀山1(),许德华1,张志业1   

  1. 1.四川大学化工学院,四川成都 610065
    2.云南磷化集团磷资源开发利用工程技术研究公司
  • 收稿日期:2019-10-14 出版日期:2020-04-10 发布日期:2020-04-22
  • 作者简介:李杰恩(1997— ),男,本科,研究方向为磷化工资源利用;E-mail: 731318556@qq.com。
  • 基金资助:
    国家重点研发计划(2018YFC1900205)

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

Li Jieen1,He Binbin2,Yang Xiushan1(),Xu Dehua1,Zhang Zhiye1   

  1. 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:2019-10-14 Published:2020-04-10 Online:2020-04-22

摘要:

针对中低品位磷矿无法直接加工的问题及云南晋宁磷矿的组成特点,使用YP系列捕收剂对原矿进行正浮选脱硅,再利用浓缩湿法磷酸和硝酸对脱硅后的磷矿进行脱镁处理。正交实验结果表明,以硝酸为预处理剂时,液固质量比为4、pH为2.5、温度为60 ℃、反应时间为4 h是最佳的脱镁条件,此条件下精矿镁磷比(氧化镁与五氧化二磷质量分数之比)为2.16%,磷损失率为1.7%;以湿法磷酸为预处理剂时,pH为2.5、液固质量比为3、反应时间为2 h、温度为50 ℃是最佳的脱镁条件,此条件下精矿镁磷比为3.32%,磷损失率为0.3%。同时对实验数据进行拟合分析,得到了干基镁磷比核心指标变化的动力学模型。该研究为有效利用高硅型中低品位磷矿提供了新的思路和参考。

关键词: 磷矿, 正浮选, 脱镁, 正交实验, 拟合分析

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.

Key words: phosphate ore, positive flotation, magnesium removal, orthogonal experiment, fitting analysis

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