复合力场中煤岩显微组分的高效富集

发布时间：2018-11-20 21:34

【摘要】：以神东煤制油煤样为研究对象,建立了煤岩显微组分基于灰分差异的赋存规律模型,并提出了基于离心力场强化的煤岩组分分选方法。借助强化重力分选机对1~0.25 mm粒级煤样进行变参数分选试验研究,揭示了基于离心力场强化的分选机制。试验结果表明,镜质组含量与煤样灰分关系显著,模型关系可用指数函数模型表示。分选试验结果表明,煤岩组分可以在复合力场中得到有效富集,分选精煤的镜质组含量可以达到70%,精煤产率可达80%。对于1~0.25 mm粒级煤样,为使流态化水压为颗粒群的提供足够的径向分层动力,高效分选需要在较低的离心力条件下进行。复合力场有效强化了煤岩显微组分间的分选行为差异,可有效实现煤岩显微组分的富集。
[Abstract]:Taking Shendong coal sample as the research object, a model of coal maceral occurrence based on ash difference is established, and a separation method of coal rock component based on centrifugal field strengthening is put forward. With the help of the enhanced gravity sorter, the separation mechanism based on the centrifugal force field is revealed through the experimental study on the variable parameter separation of the coal samples of 1o 0.25 mm. The results show that the relationship between vitrinite content and ash content in coal samples is significant, and the model relationship can be expressed by exponential function model. The separation test results show that the coal and rock components can be effectively enriched in the composite force field, the vitrinite content of the purified coal can reach 70 and the yield of the clean coal can reach 80 percent. In order to provide enough radial stratification power for fluidized water pressure to provide enough radial stratification power for coal samples of 1C 0.25 mm, the efficient separation needs to be carried out under the condition of low centrifugal force. The composite force field can effectively strengthen the separation behavior difference between coal and rock macerals and can effectively realize the enrichment of coal and rock macerals.
【作者单位】：中国矿业大学化工学院;神华神东煤炭集团有限责任公司;
【基金】：国家自然科学基金资助项目(51304192) 中国博士后基金资助项目(2014M550317)
【分类号】：TD94

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