Abstract
References
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An occupational disease caused by prolonged inhalation of coal dust, pneumoconiosis can further develop into a more dangerous malady, such as bronchial disease, emphysema of the lungs, or pulmonary tuberculosis. Poor atmospheric working conditions in unhealthy coal mines can worsen the condition. Most coal mines currently use a simple water spray system to minimize coal dust and improve working conditions. This study performs a feasibility test on a more effective spray system using surfactants. Korea Coal Corporation provided coal dust samples for a scaled spraying model test. Chemical composition, physical shape, and particle size distribution of the sample dust were taken into consideration. A standard sink test was performed with four different surfactants at six different concentrations. Using the optimal surfactant chosen from the sink test, the overall collection efficiency of coal dust with the surfactant-added spray system increased by 11.23%, compared to the efficiency of the pure water spray. Also, the collection efficiency of fine dust (0.4 ㎛～2.1 ㎛) increased by approximately 40%. Spray systems using this kind of surfactant are judged to be effective in controlling fine dust below the geometric diameter of 3.5 ㎛, which is the size of the dust causing pneumoconiosis.
석탄 분진의 흡입으로 발병되는 직업병인 진폐증은, 폐에 축적되는 정도에 따라 만성기관지염, 폐기종, 폐결핵 등의 병으로 발전되는 질병이다. 석탄 광산 내에서 분진으로 인한 열악한 대기 조건에도 불구하고 대부분의 석탄 광산에서는 채굴작업의 환경 개선을 위해 단순한 물 분사시스템을 이용하여 석탄 분진을 억제하고 있는 실정이다. 이에 본 연구에서는 계면활성제를 이용하여 분진 억제에 좀 더 효율적인 분사시스템을 연구하기 위하여 축소모형 실험을 수행 하였다. 실험에 앞서 채취된 시료의 물성실험과 입도분석을 통해 본 실험에 적용될 석탄 분진의 특성을 조사하였으며, 적절한 계면활성제를 선택하기 위해 4가지의 계면활성제를 6가지 농도로 나누어 표준침강실험을 실시하였다. 표준침강실험에서 선택된 계면활성제를 사용해 축소 분사모형실험을 한 결과, 단순한 물 분사시스템 보다 계면활성제를 첨가한 분사시스템이 약 11.23% 향상된 집진효율을 보였다. 특히, 진폐증 유발의 가능성이 큰 미세입자(0.4 ㎛～2.1 ㎛)의 경우에서는 40% 가량 더 높은 결과를 나타내었다. 향후 계면활성제를 이용한 분사시스템은 석탄 광산에서 진폐증의 원인이 되는 직경 3.5 ㎛이하의 호흡성 미세 석탄 분진 억제에 보다 효과적일 것으로 판단된다.
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- Publisher :The Korean Society of Mineral and Energy Resources Engineers
- Publisher(Ko) :한국자원공학회
- Journal Title :Journal of the Korean Society for Geosystem Engineering
- Journal Title(Ko) :한국지구시스템공학회지
- Volume : 46
- No :3
- Pages :332-341
Journal of the Korean Society of Mineral and Energy Resources Engineers
