The amenability of some Witbank bituminous ultra fine coals to binderless briquetting |
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| Affiliation: | 1. Division of Mining Technology, CSIR, P.O. Box 395, Pretoria 0001, South Africa;2. Department of Chemistry and Physics, Technikon Pretoria, P/Bag X680, Pretoria 0001, South Africa;3. Centre for Applied Materials, Department of Chemistry, University of Pretoria, Pretoria 0001, South Africa;1. National Research Tomsk Polytechnic University, 30, Lenin Avenue, Tomsk 634050, Russia;2. Gorbachev Kuzbass State Technical University, 28, Vesennyaya Avenue, Kemerovo 650000, Russia;1. College of Geology & Environment, Xi''an University of Science and Technology, Xi''an, 710054, Shaanxi, China;2. Institute of Soil and Water Conservation, Northwest Agricultural & Forestry University, Yangling, 712100, Shaanxi, China;1. State Key Laboratory of Heavy Oil Processing, PetroChina Key Laboratory of Catalysis, China University of Petroleum, Qingdao 266580, China;2. College of Science, China University of Petroleum, Qingdao 266580, China;1. Department of Chemical Engineering for Energy Resources, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China;2. Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science and Technology, Shanghai 200237, China;3. Shaanxi Coal and Chemical Industry Group Co., Ltd., Xi''an 710065, China |
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| Abstract: | Five ultra fine bituminous coals from the Witbank coalfield were studied. Selected chemical and physical properties, coal petrographic characteristics and mineralogical compositions of the coals were measured. The coals were compacted, using a briquetting press, at various feed moisture contents. The formed briquettes were then tested for compressive strength and water resistance and the values correlated with the coal characteristics and the briquetting conditions. The coals were found to be amenable to conventional binderless briquetting. The bonding in the briquettes was found to be due mainly due to the impurities in the coals, particularly kaolinite. This may add a new perspective to the fundamentals of the binderless briquetting of bituminous coals. |
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