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1.发明授权公开(公告)号：US11434444B2
公开(公告)日：2022-09-06
申请号：US16972396
申请日：2019-06-11
Applicant: China University Of Mining And Technology
Inventor： Bo Zhang , Yuemin Zhao , Yadong Zhang , Guanghui Yan , Zhenfu Luo , Chenlong Duan , Liang Dong , Enhui Zhou
Abstract: The present invention is directed towards a process for upgrading lignite comprising: prior to production pre-assess the calorific value of the coal, by selecting a relational expression between a calorific value of lignite and a degree of metamorphism, a moisture content and an ash content thereof based on a ratio of the ash content to the moisture content, pre-assess the calorific value of the coal; combining a relational expression between a production cost and the ash content and moisture content to make a cost budget; determining degrees of deashing and drying; selecting and implementing a lignite ash reduction pretreatment process; and implementing dry sorting first and then drying. The upgrading process has high sorting efficiency, high drying efficiency and low production cost, and meets the requirement for the surface moisture of the raw coal in the dry sorting operation.
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公开(公告)号：US20220314233A1
公开(公告)日：2022-10-06
申请号：US17657004
申请日：2022-03-29
Applicant: China University of Mining and Technology
Inventor： Enhui Zhou , Yuemin Zhao , Liang Dong , Chenlong Duan , Yongxin Ren , Nan Zhou
Abstract: The present disclosure relates to the field of mineral processing and separation, and in particular, to an underground coal hypergravity field separation system and a separation process. The separation system includes a grading hydrocyclone group, hypergravity field separators, feeding pumps, and conveying pumps. Coal collected underground is graded through a grading hydrocyclone first, then is fed into the hypergravity field separators for separation, and finally, is conveyed to a next link for dehydration through the conveying pumps. The separation system of the present disclosure has less supporting equipment, small floor area, and no complex pipeline, and is suitable for a downhole operation. In addition, the hypergravity field separators can provide a high-strength centrifugal acceleration, which can realize rapid separation of coal gangue particles in a radial direction and a tangential direction, and realize effective separation of fine coal gangue particles.
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公开(公告)号：US20210276018A1
公开(公告)日：2021-09-09
申请号：US17191935
申请日：2021-03-04
Applicant: China University of Mining and Technology
Inventor： Bo Zhang , Chenlong Duan , Enhui Zhou , Guanghui Yan , Zengqiang Chen , Zhenfu Luo , Zhenxing Zhang , Guangqing Zhu
Abstract: Embodiments of the present disclosure provide a pressurized two-product dense-medium separation process for oil shale, and belongs to the field of oil shale industry, in particular to the processing and utilization of oil shale. This process includes: pre-screening a raw oil shale ore through a 25 mm screen; crushing an oversize product, mixing with an undersize product, and separating by a pressurized two-product dense-medium cyclone; and subjecting an underflow and an overflow of the pressurized two-product dense-medium cyclone to dewatering and medium draining respectively to obtain a concentrate and a tailing. The present disclosure has a simple process flow, high separation efficiency and low energy consumption and can reduce the cost of oil refining and achieve better economic benefits.
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