Synthesis and characteristic analysis of coal dust explosion suppressant based on surface modification of ammonium dihydrogen phosphate with methyl hydrogen-containing silicone oil |
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| Institution: | 1. Université de Lorraine, Laboratoire Réactions et Génie de Procédés et Génie de Procédés, UMR 72714, ENSIC, Nancy, F-54001, France;2. CNRS, Laboratoire Réactions et Génie de Procédés, UMR 7274, Nancy, F-54001, France;3. Chemical Engineering Department, Universidad de Los Andes, Bogotá, 111711, Colombia;1. Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Energy Engineering, Tsinghua University, Beijing 100084, China;2. The EMS Energy Institute and Leone Family Department of Energy and Mineral Engineering, The Pennsylvania State University, University Park, PA 16802, United States;3. College of Geoscience and Surveying, China University of Mining & Technology, Beijing 100083, China;4. School of Metallurgy and Environment, Central South University, Changsha 410083, China;1. Department of Physics, SRM University, Ramapuram Campus, Chennai, Tamil Nadu, India;2. Research and Development Centre, Bharathiar University, Coimbatore, Tamil Nadu, India;3. Department of Physics, Sir Theagaraya College, Chennai, Tamil Nadu, India;4. Materials Characterization Division, National Physical Laboratory, New Delhi 110 012, India;1. Key Laboratory of Safety and High-efficiency Coal Mining, Ministry of Education, Anhui University of Science & Technology, Huainan, Anhui, 232001, China;2. School of Mining and Safety Engineering, Anhui University of Science & Technology, Huainan, Anhui, 232001, China;3. School of Safety Engineering, China University of Mining & Technology, Xuzhou, Jiangsu, 221116, China;1. College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China;2. Mine Disaster Prevention and Control-Ministry of State Key Laboratory Breeding Base, Shandong University of Science and Technology, Qingdao 266590, China |
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| Abstract: | Coal dust explosion is easy to happen in the process of coal pulverization. In order to reduce the risk of coal dust explosion and promote the safety of coal chemical industry, surface modification of the ammonium dihydrogen phosphate (ADP) explosion suppressant was performed with methyl hydrogen-containing silicone oil to obtain modified ammonium dihydrogen phosphate (MADP) powder. The explosion suppression and hydrophobic properties of MADP were tested. The experimental results show that after surface modification, MADP overcomes the defect that the traditional ammonium dihydrogen phosphate explosion suppressant is easily affected by moisture, which results in agglomeration; further, MADP has little or no solubility in water and has excellent hydrophobic properties. After surface modification, MADP has better thermal stability and can withstand higher ambient temperatures. MADP can significantly increase the minimum ignition energy, thus reducing the possibility of combustion and explosion. With the increase in the mass concentration of the explosion suppressant, the maximum explosion pressure gradually decreases and delays. Compared with ADP, MADP has better explosion suppression characteristics and can quickly and efficiently suppress explosion. |
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| Keywords: | Coal dust explosion Methyl hydrogen-containing silicone oil Ammonium dihydrogen phosphate Surface modification Explosion suppression mechanism |
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