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Enhancement Mechanisms of Acid and Alkaline Corrosion for Flotation Separation of Lepidolite and Feldspar: Influences of Surface Properties and Particle Size
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Zheyi ZHANG1, 2, Ying LUO1, 2, Qian WEI1, 2, Fen JIAO1, 2
Mining and Metallurgical Engineering | 2026, 46(1) : 73 - 79
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Mining and Metallurgical Engineering | 2026, 46(1): 73-79
• MINERAL PROCESSING •
Enhancement Mechanisms of Acid and Alkaline Corrosion for Flotation Separation of Lepidolite and Feldspar: Influences of Surface Properties and Particle Size
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Zheyi ZHANG1, 2, Ying LUO1, 2, Qian WEI1, 2, Fen JIAO1, 2
Affiliations
  • 1.School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, Hunan, China
  • 2.Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-Containing Mineral Resources, Central South University, Changsha 410083, Hunan, China
doi: 10.3969/j.issn.0253-6099.2026.01.012
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Based on investigation of the influence mechanisms of acid and alkaline corrosion for flotation separation of lepidolite and feldspar, efficient separation of lepidolite and feldspar in different particle size fractions was achieved by flotation with surface dissolution and collector interaction. It is found that in flotation process, alkaline corrosion can promote the separation of lepidolite and feldspar more effectively than acid corrosion. Under optimal conditions, lepidolite concentrates in size fraction of 38-74 μm and-38 μm are obtained with recoveries of Li2O at 92.54% and 83.20%, respectively. The effects of acid and alkaline corrosion on the wettability, morphology, reagent adsorption and electrical potential of the mineral surface were explored by contact angle measurements, high-speed camera observations, SEM, AFM, XPS, infrared spectroscopy and zeta potential analyses. Results show that alkaline corrosion, due to its distinct mechanisms at the surfaces of lepidolite and feldspar, can promote the separation between them; whereas acid corrosion has no selectivity for two minerals. Besides, both acid and alkaline corrosion are independent of particle size of minerals.

lepidolite  /  feldspar  /  surface corrosion  /  flotation separation  /  acid corrosion  /  alkaline corrosion
张喆怡, 罗颖, 魏茜, 焦芬. 酸碱蚀对浮选分离锂云母和长石的增效机制：表面性质与颗粒尺寸的影响. 矿冶工程杂志, 2026 , 46 (1) : 73 -79 . DOI: 10.3969/j.issn.0253-6099.2026.01.012
Zheyi ZHANG, Ying LUO, Qian WEI, Fen JIAO. Enhancement Mechanisms of Acid and Alkaline Corrosion for Flotation Separation of Lepidolite and Feldspar: Influences of Surface Properties and Particle Size[J]. Mining and Metallurgical Engineering, 2026 , 46 (1) : 73 -79 . DOI: 10.3969/j.issn.0253-6099.2026.01.012
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Year 2026 volume 46 Issue 1
87
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Article Info
doi: 10.3969/j.issn.0253-6099.2026.01.012
  • Receive Date：2025-09-01
  • Online Date：2026-10-08
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  • Received：2025-09-01
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Affiliations
    1.School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, Hunan, China
    2.Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-Containing Mineral Resources, Central South University, Changsha 410083, Hunan, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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