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Experimental Study on Direct Nitridation of Aluminum Ash for Nitrogen Enrichment
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Wanwu DING1, Haodeng YUAN1, Guoli WEI2, Haicun YU1, Jiazhi AN1, Xiaofeng ZHU1
Mining and Metallurgical Engineering | 2025, 45(3) : 173 - 179
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Mining and Metallurgical Engineering | 2025, 45(3): 173-179
• METALLURGY •
Experimental Study on Direct Nitridation of Aluminum Ash for Nitrogen Enrichment
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Wanwu DING1, Haodeng YUAN1, Guoli WEI2, Haicun YU1, Jiazhi AN1, Xiaofeng ZHU1
Affiliations
  • 1.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu, China
  • 2.Jiuquan Iron and Steel (Group) Co., Ltd., Jiayuguan 735100, Gansu, China
Published: 2025-06-01 doi: 10.3969/j.issn.0253-6099.2025.03.029
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A stockpile of hazardous waste aluminum ash generated during aluminum smelting has posed serious environmental pollution risks. In order to solve this, a novel approach is proposed, in which the nitrogen-enriched aluminum ash is used in the steelmaking process to promote microalloying with vanadium and nitrogen. Aluminum ash is heated and stir-fried in a nitrogen atmosphere, resulting in its reaction with nitrogen gas, thereby increasing the nitrogen level therein. The effects of reaction temperature, aluminum content and particle size on the nitrogen enrichment of aluminum ash were investigated, and the nitrogen-enriched aluminum ash was characterized by XRD and SEM-EDS. The results show that under the suitable conditions for nitrogen enrichment, including reaction temperature of 880 ℃, initial aluminum content of 45% (aluminum powder), and nitrogen flow rate at 4 L/min, the nitrogen content in the aluminum ash can be improved from 1.18% to 11.90%. During this process, metallic aluminum in the ash reacts with nitrogen gas to form AlN on the surface of alumina particles.

aluminum ash  /  nitridation  /  nitrogen enrichment  /  AlN  /  steelmaking  /  alloying with vanadium and nitrogen
Wanwu DING, Haodeng YUAN, Guoli WEI, Haicun YU, Jiazhi AN, Xiaofeng ZHU. Experimental Study on Direct Nitridation of Aluminum Ash for Nitrogen Enrichment[J]. Mining and Metallurgical Engineering, 2025 , 45 (3) : 173 -179 . DOI: 10.3969/j.issn.0253-6099.2025.03.029
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Year 2025 volume 45 Issue 3
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doi: 10.3969/j.issn.0253-6099.2025.03.029
  • Receive Date：2024-12-02
  • Online Date：2026-03-19
  • Published：2025-06-01
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  • Received：2024-12-02
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Affiliations
    1.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu, China
    2.Jiuquan Iron and Steel (Group) Co., Ltd., Jiayuguan 735100, Gansu, China
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https://castjournals.cast.org.cn/joweb/kygczz/EN/10.3969/j.issn.0253-6099.2025.03.029
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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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