Inorganic Chemicals Industry >
Leaching behavior of phosphate ore in phosphoric acid
Received date: 2022-03-07
Online published: 2022-11-03
In order to improve the production process of wet-process phosphoric acid,improve the quality of by-product phosphogypsum,and relieve the environmental pressure caused by the solid by-products in the wet-process phosphoric acid,the research on phosphorus-sulfur two-step decomposition of phosphate ore to produce phosphoric acid was conducted.The leaching behavior of a phosphate ore in GuiYang in phosphoric acid was especially studied.The results showed that when the particle size of phosphate ore was less than 75 μm,the stirring speed was 500 r/min,the reaction temperature was 70 ℃,the w（P2O5） was 40% and the reaction time was 60 min,the decomposition rate of phosphate ore reached 98.5%.The decomposition rate of phosphate ore in 40% P2O5 could be described by the Drozdov kinetic empirical model well.The reaction retardation coefficient was large,and the apparent activation energy of the reaction was 6.048 kJ/mol.It was shown that the decomposition of phosphate ore by 40% P2O5 was controlled by diffusion.SEM and EDS analysis of the residues showed that the crystallization of calcium dihydrogen phosphate was the main factor affecting the diffusion.
Key words： phosphate ore; wet phosphoric acid; calcium dihydrogen phosphate; kinetics
Hanxiao ZHENG , Li Lü , Shengwei TANG , Yanjun HE , Tao ZHANG . Leaching behavior of phosphate ore in phosphoric acid[J]. Inorganic Chemicals Industry, 2022 , 54(10) : 96 -101 . DOI: 10.19964/j.issn.1006-4990.2022-0103
| [1] | LV Li, ZHENG Dongyao, TANG Shengwei, et al.Phosphate ore particles dissolution kinetics in hydrochloric acid based on a structure-related segmented model[J].Powder Technology, 2021, 392: 141-149. |
| [2] | 廖杭, 吕莉, 唐盛伟, 等. 盐酸法制磷酸中氯化钙废水的除氟工艺[J].工业水处理, 2021, 41(11): 89-93. |
| [2] | LIAO Hang, Li Lü, TANG Shengwei, et al.Defluorination process of calcium chloride wastewater from phosphoric acid production by hydrochloric acid method[J].Industrial Water Treatment, 2021, 41(11): 89-93. |
| [3] | 郑东钥, 唐盛伟, 吕莉.盐酸分解高硅混合型胶磷矿工艺研究[J].无机盐工业, 2021, 53(2): 81-83, 104. |
| [3] | ZHENG Dongyao, TANG Shengwei, Li Lü.Study on process of hydrochloric acid leaching high silicon mixed phosphate ore[J].Inorganic Chemicals Industry, 2021, 53(2): 81-83, 104. |
| [4] | 何燕君, 郑寒笑, 吕莉, 等. 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. |
| [4] | HE Yanjun, ZHENG Hanxiao, Li Lü, et al.Carbothermal reduction process of low-grade mixed phosphate ore[J].Inorganic Che-Industry micals, 2021, 53(11): 95-99. |
| [5] | ZHANG P.Comprehensive recovery and sustainable development of phosphate resources[J].Procedia Engineering, 2014, 83: 37-51. |
| [6] | LASSIS M, MIZANE A, DADDA N, et al.Dissolution of Djebel Onk phosphate ore using sulfuric acid[J].Environmental Nanotechnology,Monitoring & Management, 2015, 4: 12-16. |
| [7] | ANTAR K, JEMAL M.Kinetics and thermodynamics of the attack of a phosphate ore by acid solutions at different temperatures[J].Thermochimica Acta, 2008, 474(1/2): 32-35. |
| [8] | CANUT M M C, JACOMINO V M F, BR?TVEIT K, et al.Microstructural analyses of phosphogypsum generated by Brazilian fertilizer industries[J].Materials Characterization, 2008, 59(4): 365-373. |
| [9] | TAYIBI H, CHOURA M, LóPEZ F A, et al.Environmental impact and management of phosphogypsum[J].Journal of Environmental Management, 2009, 90(8): 2377-2386. |
| [10] | AL-FARISS T F, ARAFAT Y, EL-ALEEM F A ABD, et al.Investigating sodium sulphate as a phosphate depressant in acidic media[J].Separation and Purification Technology, 2014, 124: 163-169. |
| [11] | 曾亚平, 党亚固, 费德君.制备高品质磷石膏的湿法磷酸新工艺的开发[J].化工进展, 2015, 34(S1): 167-172. |
| [11] | ZENG Yaping, DANG Yagu, FEI Dejun.Development of the new wet phosphoric process of preparing high-quality phosphogyps-um[J].Chemical Industry and Engineering Progress, 2015, 34(S1): 167-172. |
| [12] | SERDYUK V V, PANOV V P, TERESHCHENKO L Y, et al.Mechanism of the dissolution of apatite by phosphoric acid in the presence of electrolytes[J].Journal of Applied Chemistry of the Ussr, 1982, 55(10): 2004-2008. |
| [13] | HUFFMAN E O, CATE W E, DEMING M E, et al.Solubility of phosphates,rates of solution of calcium phosphates in phosphoric acid solutions[J].Journal of Agricultural and Food Chemistry, 1957, 5(4): 266-275. |
| [14] | SIKDAR S K,ORE F, MOORE J H.Crystallization of calcium sulfate hemihydrate in reagent-grade phosphoric acid[J].Industrial Mineral Technology, 1980, 9: 133-137. |
| [15] | ECONOMOU E D, VAIMAAKIS T C, PAPAMICHAEL E M.The kinctics of dissolution of the carbonate minerals of phosphate ores using dilute acetic acid solutions:The case of pH range from 3.96 to 6.40[J].Journal of Colloid and Interface Science, 2002, 24(1): 133-141. |
| [16] | SIETSE V D S, MESZAROS Y, MARCHEE W G J, et al.The digestion of phosphate ore in phosphoric acid[J].Industrial & Engineering Chemistry Research, 1987, 26(12): 2501-2505. |
| [17] | 严永华, 刘期崇, 夏代宽, 等. 磷酸分解磷矿石的动力学[J].高校化学工程学报, 1998, 12(3): 265-270. |
| [17] | YAN Yonghua, LIU Qichong, XIA Daikuan, et al.Reaction kinetics of phosphate ore in phosphoric acid[J].Journal of Chemical Engineering of Chinese Universities, 1998, 12(3): 265-270. |
| [18] | 周海, 杨三可, 解田.磷酸分解磷矿的动力学及影响因素研究[J].应用化工, 2021, 50(6): 1472-1477. |
| [18] | ZHOU Hai, YANG Sanke, XIE Tian.Study on the dissolution kinetics of phosphate ore in phosphoric acid and its influencing factors[J].Applied Chemical Industry, 2021, 50(6): 1472-1477. |
| [19] | 谢晨光, 唐盛伟, 王辛龙, 等. Ca（H2PO4）2-H3PO4-H2O体系的相平衡过程研究[J].无机盐工业, 2019, 51(2): 26-29. |
| [19] | XIE Chenguang, TANG Shengwei, WANG Xinlong, et al.Study on phase equilibrium of Ca（H2PO4）2-H3PO4-H2O system[J].Inorganic Chemicals Industry, 2019, 51(2): 26-29. |
/
| 〈 |
|
〉 |