低品位混合型磷矿的碳热还原工艺
收稿日期: 2021-02-01
网络出版日期: 2021-11-15
基金资助
国家重点研发计划项目(2018YFC1900201)
Carbothermal reduction process of low-grade mixed phosphate ore
Received date: 2021-02-01
Online published: 2021-11-15
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 . DOI: 10.19964/j.issn.1006-4990.2021-0075
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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