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Experimental Study on Molybdenum Extraction from Ammonia Leaching Residue of Molybdenum Calcine by Oxidative Alkaline Leaching
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Xin LIU, Wanhui FAN, Hanquan ZHANG, Hong YU, Bona DENG
Mining and Metallurgical Engineering | 2026, 46(2) : 140 - 144
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Mining and Metallurgical Engineering | 2026, 46(2): 140-144
• METALLURGY •
Experimental Study on Molybdenum Extraction from Ammonia Leaching Residue of Molybdenum Calcine by Oxidative Alkaline Leaching
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Xin LIU, Wanhui FAN, Hanquan ZHANG, Hong YU, Bona DENG
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  • School of Resource and Safety Engineering, Wuhan Institute of Technology, Wuhan 430205, Hubei, China
doi: 10.3969/j.issn.0253-6099.2026.02.022
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With ammonia leaching residue from a molybdenum ore in Henan as raw material, a high-temperature oxidative alkali leaching process was adopted to recover molybdenum therein. With Na2CO3+NaOH+H2O2 as a composite leaching agent at the dosage of 200 L/t, 160 kg/t and 200 kg/t respectively, ammonia leaching residue was leached at 70 ℃, with the solid-to-liquid ratio of 1∶5 and agitation speed of 60 r/min, leading to the leaching rate of molybdenum up to 93.75% and the molybdenum content in the obtained alkali leaching residue reduced to 0.46%. Mechanism analysis reveals that in the composite leaching agent, H2O2 can oxidize low-valent molybdenum (MoOx, where 2≤x<3) and MoS2 into soluble MoO42-, and Na2CO3 can displace molybdenum from insoluble molybdates, while NaOH can maintain a high pH of the solution to inhibit the precipitation of molybdic acid. This composite leaching system can efficiently recover refractory molybdenum from ammonia leaching residue, and also significantly shorten the ammonia leaching process. The approach provides an economically feasible technical route for the utilization of low-grade molybdenum resources.

molybdenite  /  ammonia leaching residue of molybdenum  /  oxidative alkali leaching  /  process optimization  /  synchronous leaching
刘鑫, 范宛惠, 张汉泉, 余洪, 邓博纳. 钼焙砂氨浸渣氧化碱浸提钼试验研究. 矿冶工程杂志, 2026 , 46 (2) : 140 -144 . DOI: 10.3969/j.issn.0253-6099.2026.02.022
Xin LIU, Wanhui FAN, Hanquan ZHANG, Hong YU, Bona DENG. Experimental Study on Molybdenum Extraction from Ammonia Leaching Residue of Molybdenum Calcine by Oxidative Alkaline Leaching[J]. Mining and Metallurgical Engineering, 2026 , 46 (2) : 140 -144 . DOI: 10.3969/j.issn.0253-6099.2026.02.022
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Year 2026 volume 46 Issue 2
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doi: 10.3969/j.issn.0253-6099.2026.02.022
  • Receive Date：2025-10-20
  • Online Date：2026-10-08
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  • Received：2025-10-20
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    School of Resource and Safety Engineering, Wuhan Institute of Technology, Wuhan 430205, Hubei, 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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