| 低品位混合型磷矿的碳热还原工艺 |
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| 引用本文： | 何燕君,郑寒笑,吕莉,唐盛伟.低品位混合型磷矿的碳热还原工艺[J].无机盐工业,2021,53(11):95-99. |
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| 作者姓名： | 何燕君 郑寒笑 吕莉 唐盛伟 |
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| 作者单位： | 四川大学化工学院,四川成都 610065 |
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| 基金项目： | 国家重点研发计划项目(2018YFC1900201) |
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| 摘 要： | 以窑法工艺对云南晋宁低品位磷矿的碳热还原性能进行研究。采用4因素5水平正交实验探究反应温度、反应时间、碳过量系数、硅钙物质的量比对磷矿碳热反应还原率的影响。实验结果表明,影响磷矿还原率由大到小的顺序依次为,反应温度、碳过量系数、反应时间、硅钙物质的量比。反应温度为1 300 ℃、碳过量系数 为2.6、反应时间为1.5 h、硅钙物质的量比为1.5时,还原率可达到最高值94.27%。同时,对云南晋宁低品位混合型磷矿用于窑法磷酸生产的适应性进行评价,表明该混合型磷矿适用于窑法磷酸生产,研究结果对低品位混合型磷矿窑法工艺具有一定指导意义。
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| 关 键 词： | 窑法磷酸 还原率 低品位磷矿 正交实验 |
| 收稿时间： | 2021-02-01 |
Carbothermal reduction process of low-grade mixed phosphate ore |
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| HE Yanjun,ZHENG Hanxiao,LÜ,Li,TANG Shengwei.Carbothermal reduction process of low-grade mixed phosphate ore[J].Inorganic Chemicals Industry,2021,53(11):95-99. |
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| Authors: | HE Yanjun ZHENG Hanxiao LÜ Li TANG Shengwei |
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| Affiliation: | School of Chemical Engineering,Sichuan University,Chengdu 610065,China |
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| 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. |
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| Keywords: | kiln process phosphoric acid reduction rate low grade phosphate ore orthogonal experiment |
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