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Front-end Defluorination Process for Waste Acid from Non-ferrous Metal Smelting Flue Gas Purification
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Min ZHANG1, Shenghong LIU2, Jin NI1, Chang HUANG1, Hanyu LIN2, Leibin CAO2
Copper Engineering | 2026, (1) : 139 - 145
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Copper Engineering | 2026, (1): 139-145
• Extraction Metallurgy and Chemical Engineering •
Front-end Defluorination Process for Waste Acid from Non-ferrous Metal Smelting Flue Gas Purification
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Min ZHANG1, Shenghong LIU2, Jin NI1, Chang HUANG1, Hanyu LIN2, Leibin CAO2
Affiliations
  • 1.Jiangxi Copper Technology Institute Co.，Ltd.，Nanchang 330096，China
  • 2.Jiangxi Jinde Lead Industry Co.，Ltd.，Dexing 334200，China
Published: 2026-02-28 doi: 10.3969/j.issn.1009-3842.2026.01.013
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To address challenges of high fluoride concentration and strong corrosivity in waste acid from nonferrous metal smelting flue gas purification, which hinder the automation of treatment processes, a novel defluoridation reagent (JCFRR001) was developed. This study investigated the defluoridation performance of the proposed reagent. Results showed that the reagent exhibited good adaptability under fluctuating concentrations of sulfuric acid (5~55 g/L) and fluoride ions (F−, 5~25 g/L), achieving a consistent reduction of F− to below 2.5 g/L in treated waste acid. Treatment of actual waste acid further demonstrated that, with initial F− concentrations ranging from 5.6 to 18.4 g/L, the effluent F− concentration decreased to 0.97~2.49 g/L after defluoridation. Resulting fluorite slag contained 77.47%~88.21% CaF2 by mass, meeting the FF-75 grade requirements for fluorite concentrate (YB/T 5217—2019). Moreover, the study confirmed that the front-end defluoridation process had no significant impact on subsequent sulfide-based heavy metal removal process, thereby providing technical support for the automation of waste acid treatment systems.

waste acid  /  defluorination  /  fluorite powder  /  resource recovery  /  heavy metal ion
Min ZHANG, Shenghong LIU, Jin NI, Chang HUANG, Hanyu LIN, Leibin CAO. Front-end Defluorination Process for Waste Acid from Non-ferrous Metal Smelting Flue Gas Purification[J]. Copper Engineering, 2026 , (1) : 139 -145 . DOI: 10.3969/j.issn.1009-3842.2026.01.013
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Article Info
doi: 10.3969/j.issn.1009-3842.2026.01.013
  • Receive Date：2025-07-21
  • Online Date：2026-09-08
  • Published：2026-02-28
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  • Received：2025-07-21
  • Revised：2025-12-18
Affiliations
    1.Jiangxi Copper Technology Institute Co.，Ltd.，Nanchang 330096，China
    2.Jiangxi Jinde Lead Industry Co.，Ltd.，Dexing 334200，China
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https://castjournals.cast.org.cn/joweb/tygc/EN/10.3969/j.issn.1009-3842.2026.01.013
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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
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Percentage of total
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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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