混酸对中低品位伴生稀土磷矿酸浸过滤的影响研究
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摘要
以含稀土中低品位磷矿为研究对象,采用盐酸和硫酸的混合酸浸出磷矿中的五氧化二磷和稀土,考察了酸矿比、氯化钠加入量、酸浸温度、混合酸中硫酸含量和酸浸时间对酸浸渣过滤强度的影响。结果表明,在酸矿比为2.5、氯化钠加入量为40 kg/t矿粉、酸浸温度为60℃、混合酸中硫酸含量为1.7%和酸浸时间为120 min的条件下,酸浸渣过滤强度可达34 kg·m~(-2)·h~(-1)以上,稀土浸出率可达96%以上,五氧化二磷浸出率可达98%以上。
The effect of acid-ore ratio, sodium chloride dosage, acid leaching temperature, sulfuric acid content in mixed acid and acid leaching time on the filtration strength of acid leaching residue was investigated. The results show that under the conditions of acid-ore ratio 2.5, sodium chloride dosage 40 kg/t ore powder, acid leaching temperature 60 ℃, sulfuric acid content 1.7% in mixed acid and acid leaching time 120 min, the filtration strength of acid leaching residue can reach more than 34 kg·m~(-2)·h~(-1), rare earth leaching rate can reach more than 96%, and phosphorus pentoxide leaching rate can reach more than 98%.
The effect of acid-ore ratio, sodium chloride dosage, acid leaching temperature, sulfuric acid content in mixed acid and acid leaching time on the filtration strength of acid leaching residue was investigated. The results show that under the conditions of acid-ore ratio 2.5, sodium chloride dosage 40 kg/t ore powder, acid leaching temperature 60 ℃, sulfuric acid content 1.7% in mixed acid and acid leaching time 120 min, the filtration strength of acid leaching residue can reach more than 34 kg·m~(-2)·h~(-1), rare earth leaching rate can reach more than 96%, and phosphorus pentoxide leaching rate can reach more than 98%.
引文
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[6] 梅吟,张泽强,张文胜,吴启海,吴健,池汝安.含稀土磷精矿湿法制磷酸过程稀土的浸出规律[J].武汉工程大学学报,2011,33(3):9-11,15.Mei Y,Zhang Z Q,Zhang W S,Wu Q H,Wu J,Chi R A.The leaching rule of rare earths in production phosphoric acid by dehydrate process with phosphate concentrates bearing rare earths[J].Journal of Wuhan University of Engineering,2011,33 (3):9-11,15.
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[9] 郑凯,夏勇,温小英,刘庆友.从伴生稀土磷矿中富集与提取稀土元素的研究进展[J].矿产保护与利用,2017,(5):93-98.Zheng K,Xia Y,Wen X Y,Liu Q Y.Development of concentration and extraction of rare earth from rare earth-containing phosphorite[J].Mineral Protection and Utilization,2017,(5):93-98.
[10] 杨松,金会心,王眉龙.从伴生稀土磷矿中回收稀土的研究进展[J].湿法冶金,2015,34(2):92-95.Yang S,Jin H X,Wang M L.Advances in extraction of rare earths from phosphorite associated rare earths[J].Hydrometallurgy,2015,34 (2):92-95.
[11] 金会心,李军旗,吴复忠.含稀土磷矿酸解动力学及稀土浸出机理[J].北京科技大学学报,2011,33(9):1071-1078.Jin H X,Li J Q,Wu F Z.Acidification kinetics and leaching mechanism of rare earth-containing phosphate rock [J].Journal of Beijing University of Science and Technology,2011,33 (9):1071-1078.
[12] 冯立成,周强,周密,刘泉,梁明征.中低品位磷矿湿法磷酸料浆过滤性能研究[J].四川大学学报(工程科学版),2000,(6):54-56.Feng L C,Zhou Q,Zhou M,Liu Q,Liang M Z.Study on filtration properties of wet-process phosphoric acid made by median and low grade phosphate rocks[J].Journal of Sichuan University (Engineering Science Edition),2000,(6):54-56.
[2] 陈吉艳,杨瑞东,张杰.贵州织金含稀土磷矿床稀土元素赋存状态研究[J].矿物学报,2010,30(1):123-129.Chen J Y,Yang R D,Zhang J.Mode of occurrence of rare earth elements in posphorite in Zhijin county,Guizhou province,China[J].Journal of Minerals,2010,30(1):123-129.
[3] 娄伦武,赵宗尧,卓知杰,陈铭.硫酸分解伴生稀土磷矿综合回收稀土研究现状[J].化肥工业,2018,45(2):10-14.Lou L W,Zhao Z Y,Zhuo Z J,Chen M.Research status of comprehensive recovery of rare earth from decomposition of phosphate rock associated with rare earth by sulfuric acid[J].Chemical Fertilizer Industry,2018,45 (2):10-14.
[4] 张钦,虞江,顾春光.贵州织金伴生稀土磷矿综合利用技术的研究[J].磷肥与复肥,2012,27(3):15-17.Zhang Q,Yu J,Gu C G.Study on the comprehensive utilization technology of Zhijin phosphate rock associated with rare earth elements in Guizhou province[J].Phosphate Fertilizer and Compound Fertilizer,2012,27(3):15-17.
[5] 吴素彬,聂登攀,王振杰,曾从江,刘安荣,薛安.织金磷矿在盐酸中的酸解工艺研究[J].化工矿物与加工,2012,41(7):5-8.Wu S B,Nie D P,Wang Z J,Zeng C J,Liu A R,Xue A.Study on the process for acidolysis of hydrochloric acid from Zhijin phosphate mine[J].Chemical Minerals and Processing,2012,41 (7):5-8.
[6] 梅吟,张泽强,张文胜,吴启海,吴健,池汝安.含稀土磷精矿湿法制磷酸过程稀土的浸出规律[J].武汉工程大学学报,2011,33(3):9-11,15.Mei Y,Zhang Z Q,Zhang W S,Wu Q H,Wu J,Chi R A.The leaching rule of rare earths in production phosphoric acid by dehydrate process with phosphate concentrates bearing rare earths[J].Journal of Wuhan University of Engineering,2011,33 (3):9-11,15.
[7] 崔文鹏,孙泽炼,周骏宏,胡科继,田县利,朱博含.织金磷矿中伴生稀土的提取研究[J].稀土,2014,35(4):42-46.Cui W P,Sun Z L,Zhou J H,Hu K J,Tian X L,Zhu B H.Study on extraction of rare earths from phosphorite of Zhijin[J].Chinese Rare Earths,2014,35 (4):42-46.
[8] 赵丽君,聂登攀,何灏,王振杰,薛安,吴素彬.盐酸浸出中低品位胶磷矿中稀土的研究[J].有色金属(冶炼部分),2014,(4):45-47.Zhao L J,Nie D P,He H,Wang Z J,Xue A,Wu S B.Study on leaching of rare earth from medium-low grade collophanite with hydrochloric acid [J].Non-ferrous Metals (Smelting Part),2014,(4):45-47.
[9] 郑凯,夏勇,温小英,刘庆友.从伴生稀土磷矿中富集与提取稀土元素的研究进展[J].矿产保护与利用,2017,(5):93-98.Zheng K,Xia Y,Wen X Y,Liu Q Y.Development of concentration and extraction of rare earth from rare earth-containing phosphorite[J].Mineral Protection and Utilization,2017,(5):93-98.
[10] 杨松,金会心,王眉龙.从伴生稀土磷矿中回收稀土的研究进展[J].湿法冶金,2015,34(2):92-95.Yang S,Jin H X,Wang M L.Advances in extraction of rare earths from phosphorite associated rare earths[J].Hydrometallurgy,2015,34 (2):92-95.
[11] 金会心,李军旗,吴复忠.含稀土磷矿酸解动力学及稀土浸出机理[J].北京科技大学学报,2011,33(9):1071-1078.Jin H X,Li J Q,Wu F Z.Acidification kinetics and leaching mechanism of rare earth-containing phosphate rock [J].Journal of Beijing University of Science and Technology,2011,33 (9):1071-1078.
[12] 冯立成,周强,周密,刘泉,梁明征.中低品位磷矿湿法磷酸料浆过滤性能研究[J].四川大学学报(工程科学版),2000,(6):54-56.Feng L C,Zhou Q,Zhou M,Liu Q,Liang M Z.Study on filtration properties of wet-process phosphoric acid made by median and low grade phosphate rocks[J].Journal of Sichuan University (Engineering Science Edition),2000,(6):54-56.
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