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Experimental study on explosion intensity of dust cloud in lead and zinc concentrate powder
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Zhenli DENG1, Guoju QIN1, Yunjian TANG**, 1, Xiaoquan LI2, 3, Ningying WEI2, 3
China Safety Science Journal | 2025, 35(12) : 64 - 69
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China Safety Science Journal | 2025, 35(12): 64-69
• Safety engineering technology •
Experimental study on explosion intensity of dust cloud in lead and zinc concentrate powder
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Zhenli DENG1, Guoju QIN1, Yunjian TANG**, 1, Xiaoquan LI2, 3, Ningying WEI2, 3
Affiliations
  • 1Guangxi Zhongjin Lingnan Mining Co., Ltd., Laibin Guangxi 545902, China
  • 2School of Resources, Environment and Materials Science, Guangxi University, Nanning Guangxi 530004, China
  • 3Guangxi Colleges and Universities Key Laboratory of Minerals Engineering, Guangxi University, Nanning Guangxi 530004, China
Published: 2025-12-28 doi: 10.16265/j.cnki.issn1003-3033.2025.12.1385
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In order to prevent dust cloud combustion and explosion accidents in the high sulfur content concentrate warehouse after beneficiation, lead concentrate and zinc concentrate of Panlong Lead Zinc Mine were taken as examples. Tests on explosion intensity and the lower explosion limit at different mass concentrations were conducted using a 20 L balls. Main parameters, including the maximum explosion pressure, explosion lower limit, and explosion index of the lead zinc concentrate powder dust cloud, were obtained. The results show that maximum explosion pressures of lead concentrate and zinc concentrate dust clouds were 0.335 and 0.251 MPa, respectively, both occurring when the mass concentration of the dust cloud was 1 000 g/m3. The lower explosive limits of mass concentration are 160-170 and 210-220 g/m3, respectively, indicating low explosion risk. The explosion risk and hazard of dust clouds in lead concentrate are higher than those in zinc concentrate. The explosion mechanism of concentrate dust cloud particles being ignited, exploded, and subjected to a chain reaction is obtained. These findings provide an experimental and theoretical basis for preventing dust cloud explosion of concentrate in the concentrate warehouse.

lead concentrate  /  zinc concentrate  /  dust cloud  /  explosion intensity  /  lower explosive limit
Zhenli DENG, Guoju QIN, Yunjian TANG, Xiaoquan LI, Ningying WEI. Experimental study on explosion intensity of dust cloud in lead and zinc concentrate powder[J]. China Safety Science Journal, 2025 , 35 (12) : 64 -69 . DOI: 10.16265/j.cnki.issn1003-3033.2025.12.1385
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Year 2025 volume 35 Issue 12
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Article Info
doi: 10.16265/j.cnki.issn1003-3033.2025.12.1385
  • Receive Date：2025-07-10
  • Online Date：2026-07-09
  • Published：2025-12-28
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  • Received：2025-07-10
  • Revised：2025-09-22
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Affiliations
    1Guangxi Zhongjin Lingnan Mining Co., Ltd., Laibin Guangxi 545902, China
    2School of Resources, Environment and Materials Science, Guangxi University, Nanning Guangxi 530004, China
    3Guangxi Colleges and Universities Key Laboratory of Minerals Engineering, Guangxi University, Nanning Guangxi 530004, 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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