Journal of Korean Society of Occupational and Environmental Hygiene (한국산업보건학회지)

Korean Industrial Hygiene Association (한국산업보건학회)
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Analysis of Components and Oxygen Consumption Rate for Zinc Concentrates in a Closed Chamber

아연정광의 성분분석 및 챔버내 산소소모량 평가

  • Hae Dong Park (Occupational Safety and Health Research Institute, KOSHA) ;
  • Eun Song Hwang (Occupational Safety and Health Research Institute, KOSHA)
  • 박해동 (한국산업안전보건공단 산업안전보건연구원) ;
  • 황은송 (한국산업안전보건공단 산업안전보건연구원)
  • Received : 2023.02.09
  • Accepted : 2023.03.29
  • Published : 2023.03.31
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Abstract

Objective: This study was conducted to identify the cause of suffocation accident. Methods: We analyzed the components of zinc concentrates by ICP-OES (inductively coupled plasma optical emission spectroscopy) and tested the oxygen consumption by zinc concentrates in a 13.2-liter closed chamber. Results: Zinc, sulfur and iron were the main components of the four types of zinc concentrates, and accounted for 76~89% by weight. Zinc concentrates (0.5 or 0.927 kg) depleted the oxygen concentration from 20.9% to 7.4~18.9% during seven days. The rate of oxygen consumption was in the range of 3.0~11.0 mM/day·kg-sample at 21~24℃ and around 95% of free air space within the closed chamber. Conclusion: Since zinc concentrate consumes oxygen in a confined space, measures should be taken to prevent suffocation accident (such as ventilation and monitoring of oxygen concentration).

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