Environment·Health·Safety

Carbothermal reduction process of low-grade mixed phosphate ore

  • Yanjun HE ,
  • Hanxiao ZHENG ,
  • Li LÜ ,
  • Shengwei TANG
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  • School of Chemical Engineering,Sichuan University,Chengdu 610065,China

Received date: 2021-02-01

  Online published: 2021-11-15

Abstract

Carbothermal reduction properties of low grade phosphate ore from Jinning,Yunnan were studied by kiln process.Four-factor and five-level orthogonal experiment was used to explore the influence of reaction temperature,reaction time,carbon excess coefficient,and Si/Ca ratio on the reduction rate of phosphate ore carbothermal reaction.The experimental re-sults showed that the order of factors influencing the phosphate ore reduction rate was as follows:Reaction temperature,carbon excess coefficient,reaction time,Si/Ca ratio.When the reaction temperature was 1 300 ℃,the carbon excess coefficient was 2.6,the reaction time was 1.5 h,and the ratio of n(Si)/n(Ca) was 1.5,the reduction rate could reach the highest value of 94.27%.Simultaneously,the applicability of Jinning,Yunnan low-grade mixed phosphate ore for kiln-process phosphoric acid production was evaluated,which showed that the mixed phosphate ore was suitable for kiln phosphoric acid production,and the research results had certain guiding significance for the low-grade mixed phosphate kiln process.

Cite this article

Yanjun HE , Hanxiao ZHENG , Li LÜ , Shengwei TANG . Carbothermal reduction process of low-grade mixed phosphate ore[J]. Inorganic Chemicals Industry, 2021 , 53(11) : 95 -99 . DOI: 10.19964/j.issn.1006-4990.2021-0075

References

[1] 苗俊艳, 王艳语, 许秀成. 中低品位磷矿及磷尾矿的综合利用现状[J]. 硫磷设计与粉体工程, 2019(6):11-13.
[2] 蒲勇, 张卫红. 我国工业磷酸生产工艺选择概要[J]. 硫磷设计与粉体工程, 2012(1):27-29.
[3] 贡长生. 现代磷化工技术和应用[M]. 北京: 化学工业出版社, 2013.
[4] 陈善继. 我国电炉制磷能耗综述[J]. 硫磷设计, 1995(1):1-7.
[5] 孙志立, 杜建学. 电热法制磷[M]. 北京: 冶金工业出版社, 2010.
[6] 田萍, 徐兵, 张琦弦, 等. 电炉生产黄磷的能耗分析与节能潜力[J]. 化工进展, 2009, 28(S1):94-97.
[7] 陈善继. 窑法磷酸生产工艺特点及展望[J]. 无机盐工业, 2009, 41(6):1-3.
[8] 吕莉, 梁斌, 刘强, 等. 窑法磷酸中磷酸钙对P2O5反吸过程[J]. 化工学报, 2016, 67(10):4399-4405.
[9] HEY D, DIETERMAN A J. Production of wet process phosphoric acid:US,3653827[P]. 1972-04-04.
[10] 杨建中. 湿法磷酸企业应对磷矿贫化的技术措施[J]. 磷肥与复肥, 2007, 22(4):24-25.
[11] 吴潘, 吕莉, 李剑锋. 中低品位磷矿窑法磷酸工艺条件的研究[J]. 辽宁化工, 2017, 46(12):1176-1178.
[12] WU P, LV L, TANG S Y, et al. The fouling properties of SiO2-CaO-P2O5 system in high-temperature rotary kiln phosphoric acid pro-cess[J]. Chinese Journal of Chemical Engineering, 2020, 28(7):1824-1831.
[13] 周玉新. 实验设计与数据处理[M]. 武汉: 湖北科学技术出版社, 2005.
[14] 杨宏辉, 李春, 梁斌, 等. 窑法制磷酸反应的热力学[J]. 北京:化学反应工程与工艺, 2011, 27(6):543-550.
[15] 刘光启. 化学化工物性数据手册[M]. 北京: 化学工业出版社, 2002.
[16] 邱礼有, 江礼科. 窑法磷酸生产的旋窑制气试验研究[J]. 化学反应工程与工艺, 1993(1):90-97.
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