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Huang X, Zhang Q. Interaction Behavior between Coarse and Fine Particles in the Reverse Flotation of Fluorapatite and Dolomite. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:12931-12943. [PMID: 37647509 DOI: 10.1021/acs.langmuir.3c02117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
The precondition for efficient flotation of middle- to low-grade phosphate ore is the dissociation of apatite from gangue minerals through fine grinding. However, fine gangue minerals, such as dolomite, have a lower hardness and are thus easily overground and converted into slime during the grinding stage. The effect of -10 μm dolomite fines (Dol-10μm) on the flotation of -75 + 25 μm dolomite (Dol-75+25μm) and -75 + 25 μm fluorapatite (FAp-75+25μm) from a detailed mechanism was investigated by microflotation tests, cryo-electron microscopy analysis, contact angle measurements, bubble-particle attachment test, and EDLVO theory. It was found that Dol-10μm significantly reduced the recovery of Dol-75+25μm and FAp-75+25μm. The Dol-10μm particles could decrease the flotation recovery of Dol-75+25μm particles by masking on their surfaces, thus reducing the hydrophobicity of mineral surfaces and preventing them from floating. Furthermore, Dol-10μm particles were easily adsorbed on the FAp-75+25μm surface and could not be effectively floated, which results in fine dolomite being mixed into the concentrate at the bottom of the tank, thereby reducing the selectivity of reverse flotation for phosphate ore. The interaction energy calculation showed that the presence of NaOL led to an attractive interaction force between Dol-10μm and Dol-75+25μm, as well as between Dol-10μm and FAp-75+25μm. As a result, Dol-10μm particles presented a nonselective aggregation with Dol-75+25μm and FAp-75+25μm particles, explaining the phenomenon of "slime coating" and the depressing effect of dolomite fines on phosphate reverse flotation.
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Affiliation(s)
- Xiaofen Huang
- College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, Guizhou, China
- National and Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, Guizhou, China
- Guizhou Engineering Laboratory of Efficient Utilization of Superior Mineral Resources, Guiyang 550025, China
- Guizhou Key Laboratory of Comprehensive Utilization of Nonmetallic Mineral Resources, Guiyang 550025, Guizhou, China
| | - Qin Zhang
- Guizhou Academy of Sciences, Guiyang 550001, Guizhou, China
- National and Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, Guizhou, China
- Guizhou Engineering Laboratory of Efficient Utilization of Superior Mineral Resources, Guiyang 550025, China
- Guizhou Key Laboratory of Comprehensive Utilization of Nonmetallic Mineral Resources, Guiyang 550025, Guizhou, China
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Jiang X, Zhou Y, Meng X, Wu G, Miao Z, Sun F, Xu E. The effect of inorganic salt modification of sludge on the performance of sludge-coal water slurry. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.131146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
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Han H, Yin W, Wang D, Zhu Z, Yang B, Yao J. New insights into the dispersion mechanism of citric acid for enhancing the flotation separation of fine siderite from hematite and quartz. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128459] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Process Mineralogy Characteristics and Flotation Application of a Refractory Collophanite from Guizhou, China. MINERALS 2021. [DOI: 10.3390/min11111249] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A refractory phosphate ore obtained from Guizhou, China, contains high amounts of detrimental metal impurities (e.g., Fe, Al, and Mg) which affect the deep wet processing of phosphorus products before use. In this study, mineralogy parameters of the ore such as mineral composition, disseminated particle size, mineral liberation degree, and intergrowth relationship were investigated using X-ray fluorescence spectrometer (XRF), X-ray powder diffractometer (XRD), and advanced mineral identification and characterization system (AMICS). The mechanism for flotation separation was also discussed. The results showed that the ore was a fine-grained calcareous-siliceous collophanite with high P2O5 grade. The gangue minerals such as quartz, sericite (muscovite), pyrite, and dolomite were finely disseminated and encapsulated by fluoroapatite particles in a rather complex relationship. A double reverse flotation process was carried out based on the separation principle of less flotation and more inhibition. A phosphorous concentrate with a P2O5 grade of 35.53%, SiO2 content of 5.88%, MgO content of 0.91%, sesquioxide (Fe2O3 + Al2O3) content of 1.98%, MER value of 8.13%, and phosphorus recovery of 75.04% was obtained. Based on the flotation test results and the analysis of process mineralogy parameters, we concluded that the main causes of difficulty in separation of collophanite are fine disseminated particle size, poor mineral liberation degree, and serious argillization. The selection of foam-controlled collectors, efficient dispersing inhibitors and classified desliming process will be necessary for improving flotation index. These results provide a technical reference for subsequent development and utilization of collophanite resources.
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Double roles of sodium hexametaphosphate in the flotation of dolomite from apatite. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127080] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Li L, Hao H, Yuan Z, Liu Z, Li C. Regulating effects of citric acid and pregelatinized starch on selective flocculation flotation of micro-fine siderite. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113726] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Bu X, Wang X, Zhou S, Li B, Zhan H, Xie G. Discrimination of Six Flotation Kinetic Models Used in the Conventional Flotation and Carrier Flotation of -74 μm Coal Fines. ACS OMEGA 2020; 5:13813-13821. [PMID: 32566847 PMCID: PMC7301532 DOI: 10.1021/acsomega.0c01116] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 05/19/2020] [Indexed: 05/12/2023]
Abstract
In this study, experimental results of conventional flotation and carrier flotation were characterized by six commonly used flotation kinetic models. Two statistical criteria (coefficient of determination, R 2, and root mean square error, RMSE) were used for comparison of fitting performance of different models. All kinetic models tested gave good levels of goodness of fit, but the second-order model with rectangular distribution (model 6) provided the best fitting performance for the experimental data of conventional flotation and carrier flotation. On this basis, two parameters, that is, modified flotation rate constant (K m) and selectivity index (SI), were used to evaluate the difference in flotation separation selectivity between conventional flotation and carrier flotation. Comparisons of K m and SI values indicated that carrier flotation significantly improved the flotation rate constant of combustible materials and flotation separation selectivity of ultrafine coal (-74 μm). In addition, measurements of average bubble size and water recovery indicated that both the coalescence of bubbles and the drainage of liquid in the froth were promoted when coarse coal particles (contact angle >90°) were employed as the carrier to assist the flotation recovery of ultrafine particles, which in turn favored the inhibition effect of the entrainment of gangue materials in carrier flotation compared to conventional flotation.
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Affiliation(s)
- Xiangning Bu
- Key
Laboratory of Coal Processing and Efficient Utilization (Ministry
of Education), School of Chemical Engineering
and Technology, Xuzhou 221116, China
| | - Xuexia Wang
- Key
Laboratory of Coal Processing and Efficient Utilization (Ministry
of Education), School of Chemical Engineering
and Technology, Xuzhou 221116, China
| | - Shaoqi Zhou
- Key
Laboratory of Coal Processing and Efficient Utilization (Ministry
of Education), School of Chemical Engineering
and Technology, Xuzhou 221116, China
| | - Biao Li
- Mining
and Minerals Engineering Department, Virginia
Polytechnic Institute and State University, Blacksburg, Virginia 24060, United States
| | - Hanhui Zhan
- School
of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
| | - Guangyuan Xie
- Key
Laboratory of Coal Processing and Efficient Utilization (Ministry
of Education), School of Chemical Engineering
and Technology, Xuzhou 221116, China
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Wang X, Zhou S, Bu X, Ni C, Xie G, Peng Y. Investigation on interaction behavior between coarse and fine particles in the coal flotation using focused beam reflectance measurement (FBRM) and particle video microscope (PVM). SEP SCI TECHNOL 2020. [DOI: 10.1080/01496395.2020.1777428] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Xuexia Wang
- Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu, China
| | - Shaoqi Zhou
- Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu, China
| | - Xiangning Bu
- Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu, China
| | - Chao Ni
- Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu, China
| | - Guangyuan Xie
- Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu, China
| | - Yaoli Peng
- Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu, China
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Liu W, Liu W, Zhao B, Zhao L, Li D, Fang P, Liu W. Novel insights into the adsorption mechanism of the isopropanol amine collector on magnesite ore: A combined experimental and theoretical computational study. POWDER TECHNOL 2019. [DOI: 10.1016/j.powtec.2018.11.063] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ni C, Bu X, Xia W, Peng Y, Yu H, Xie G. Observing slime-coating of fine minerals on the lump coal surface using particle vision and measurement. POWDER TECHNOL 2018. [DOI: 10.1016/j.powtec.2018.08.034] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Hao H, Li L, Yuan Z, Liu J. pH-controlled dispersion of micro-fine siderite from hematite and quartz. POWDER TECHNOL 2018. [DOI: 10.1016/j.powtec.2018.08.067] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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