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Preparation of composite abrasives by electrostatic self assembly methodand its polishing propertiesin Cu chemical mechanical polishing

Huang Yishen,Xu Xuefeng,Yao Chunyan,Hu Jiande and Peng Wei

Strategic Study of CAE 2012, Volume 14, Issue 10,   Pages 82-89

Abstract: The composite abrasives slurries are prepared for copper polishing.The polishing results indicate that it is SiO2 abrasives, not only coated SiO2 abrasive on polymer particlesbut also free SiO2 abrasive in slurry, that offer the polishing action.The material removal rates of copper polishing are 264 nm/min, 348 nm/min and 476 nm/min using singleSiO2 abrasive slurry, PE0 BGF/SiO2 mixed abrasives slurry and PE3 BGF/SiO2 composite abrasives slurry

Keywords： chemical mechanical polishing     polishing slurry     composite abrasives     polyelectrolyte     copper    

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Experimental study on slurry-induced fracturing during shield tunneling

Teng WANG, Dajun YUAN, Dalong JIN, Xinggao LI

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2,   Pages 333-345 doi: 10.1007/s11709-021-0718-8

Abstract: Facial support in slurry shield tunneling is provided by slurry pressure to balance the external earthHydraulic fracturing may occur and cause a significant decrease in the support pressure if the slurryPreventing the occurrence of hydraulic fracturing in a slurry shield requires investigating the effectsIn this study, a hydraulic fracturing apparatus was developed to test the slurry-induced fracturing ofsample parameters and loading conditions, including types of holes, unconfined compressive strength, slurry

Keywords： slurry shield tunneling     hydraulic fracturing test     fracturing pressure     fracture dip     unconfined compressivestrength     slurry viscosity    

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Review on mechanism and process of surface polishing using lasers

Arun KRISHNAN, Fengzhou FANG

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 3,   Pages 299-319 doi: 10.1007/s11465-019-0535-0

Abstract: Laser polishing is a technology of smoothening the surface of various materials with highly intense laserHigh precision polishing of surfaces can be done using laser process.Currently, laser polishing has extended its applications from photonics to molds as well as bio-medicalConventional polishing techniques have many drawbacks such as less capability of polishing freeform surfacesparameters briefly to get a better understanding about the entire polishing process.

Keywords： laser polishing     surface roughness     process parameters     mechanism    

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Numerical analysis of hydrodynamic process of circular-translational-moving polishing (CTMP)

ZHAI Wenjie, LIU Changxiong, LIANG Yingchun

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 4,   Pages 441-448 doi: 10.1007/s11465-008-0074-6

Abstract: By keeping a pad moving relative to a wafer along a circular path without rotation, we developed a polishingtechnique called circular-translational-moving polishing (CTMP), which permits multidirectional polishingof the work piece and thus bears the advantage of isotropic polishing and a potential increase of materialThe reason for negative pressure in CTMP and its effect on polishing is discussed.pitch angles under different working conditions are obtained in terms of the applied load, moments, and polishing

Keywords： numerical analysis     practical CTMP     circular-translational-moving polishing     CTMP     different    

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Advances in polishing of internal structures on parts made by laser-based powder bed fusion

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11465-022-0724-0

Abstract: Various polishing technologies for L-PBF components with inner structures are presented, whereas their

Keywords： laser-based powder bed fusion     polishing     internal structures     surface quality     surface features     post    

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Experimental study on high-efficiency polishing for potassium dihydrogen phosphate (KDP) crystal by using

Ziyuan LIU, Hang GAO, Dongming GUO

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 2,   Pages 294-302 doi: 10.1007/s11465-019-0576-4

Abstract: , and the effect of relative humidity (RH) on polishing performance is studied.Results show that the polishing performance is improved with increasing RH.However, precisely controlling the RH is extremely difficult during TAWF polishing.and the polishing pad.Excessive polishing pressure and revolution rate remarkably reduce the life of the polishing pad and

Keywords： dihydrogen phosphate (KDP) crystal     controllable deliquescence     two-phase air–water fluid     high-efficiency polishing    

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Copper fractal growth during recycling from waste printed circuit boards by slurry electrolysis

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1405-7

Abstract:

• Copper fractal growth was observed during WPCBs recycling by slurry

Keywords： Dendritic copper     Fractal growth     WPCBs     Slurry electrolysis    

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Kinetic study of hydrodesulfurization of coker gas oil in a slurry reactor

Haiding XIANG, Tiefeng WANG

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 2,   Pages 139-144 doi: 10.1007/s11705-013-1323-8

Abstract: In this work, we studied the hydrodesulfurization (HDS) of CGO in a slurry reactor.A macro reaction kinetic model was established for the HDS of CGO in the slurry reactor.

Keywords： coker gas oil     hydrodesulfurization     slurry reactor     reaction kinetic model    

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Experimental study on the stratum applicability and mechanisms of bubble–slurry for earth pressure balance

Frontiers of Structural and Civil Engineering   Pages 1387-1399 doi: 10.1007/s11709-023-0005-y

Abstract: Typically, foam combined with polymers and slurry is used to solve spewing.However, in current techniques, slurry, foam, and the other agents are mixed with soil separately, theirIn this study, an anionic surfactant was used to foam in bentonite slurry to form bubble–slurry to maximizethe synergy between bubbles and slurry.The slump, volume stability, and permeability test of bubble–slurry-conditioned sand was conducted to

Keywords： EPB shield     bubble–slurry     soil conditioning     stability     permeability    

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Study on direct alcohol/ether fuel synthesis process in bubble column slurry reactor

Zhen CHEN, Haitao ZHANG, Weiyong YING, Dingye FANG

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 4,   Pages 461-471 doi: 10.1007/s11705-010-0517-6

Abstract: The recent studies of direct alcohol/ether synthesis process in slurry reactors were reviewed, and theglobal kinetics model for direct dimethyl ether (DME) synthesis from syngas over a novel Cu-Zn-Al-Zr slurrydata, and a steady-state one-dimensional mathematical model was further developed in bubble column slurryfavorable to the increase of CO conversion, selectivity of dimethyl ether, product yield and height of slurry

Keywords： syngas     alcohol/ether fuel     slurry catalyst     bubble column slurry reactor     global kinetics     mathematical model    

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Numerical simulation on flow of ice slurry in horizontal straight tube

Shengchun LIU,Ming SONG,Ling HAO,Pengxiao WANG

Frontiers in Energy 2021, Volume 15, Issue 1,   Pages 201-207 doi: 10.1007/s11708-017-0451-0

Abstract: Numerical simulation on flow of ice slurry in horizontal straight tubes was conducted in this paper toinfluence of the diameter and length of tubes, the ice packing factors (IPF) and the flow velocity of ice slurryIt could also be concluded that future rheological model of ice slurry should be considered in three

Keywords： ice slurry     horizontal tubes     numerical simulation     pressure drop     viscosity model    

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Development and demonstration plant operation of an opposed multi-burner coal-water slurry gasification

WANG Fuchen, ZHOU Zhijie, DAI Zhenhua, GONG Xin, YU Guangsuo, LIU Haifeng, WANG Yifei, YU Zunhong

Frontiers in Energy 2007, Volume 1, Issue 3,   Pages 251-258 doi: 10.1007/s11708-007-0035-5

Abstract: The features of the opposed multi-burner (OMB) gasification technology, the method and process of the research, and the operation results of a pilot plant and demonstration plants have been introduced. The operation results of the demonstration plants show that when Beisu coal was used as feedstock, the OMB CWS gasification process at Yankuang Cathy Coal Co. Ltd had a higher carbon conversion of 3%, a lower specific oxygen consumption of about 8%, and a lower specific carbon consumption of 2%–3% than that of Texaco CWS gasification at the Lunan Fertilizer Plant. When Shenfu coal was used as feedstock, the OMB CWS gasification process at Hua-lu Heng-sheng Chemical Co. Ltd had a higher carbon conversion of more than 3%, a lower specific oxygen consumption of about 2%, and a lower specific coal consumption of about 8% than that of the Texaco CWS gasification process at Shanghai Coking & Chemical Corporation. The OMB CWS gasification technology is proven by industrial experience to have a high product yield, low oxygen and coal consumption and robust and safe operation.
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Application of gamma-ray attenuation technology in density measurement of a slurry reactor

Jian XU, Weisheng WEI, Kai ZHANG

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 4,   Pages 486-490 doi: 10.1007/s11705-010-0509-6

Abstract: Axial density profile of the gas-liquid-solid mixture in a slurry bubble column was measured by gamma-ray

Keywords： slurry reactor     axial density distribution     gamma-ray attenuation technology    

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Research and application on separation technology of slurry and water under sandy-gravel stratum

Wang Guangyu,Sun Shanhui,Su Qinggui

Strategic Study of CAE 2010, Volume 12, Issue 12,   Pages 41-45

Abstract:

This paper gives a summary on application technology of slurry and water

Keywords： slurry tunnel machine     separation of slurry and water     filter-press    

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Advances in the slurry reactor technology of the anthraquinone process for H

Hongbo Li, Bo Zheng, Zhiyong Pan, Baoning Zong, Minghua Qiao

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 1,   Pages 124-131 doi: 10.1007/s11705-017-1676-5

Abstract: This paper overviews the development of the anthraquinone auto-oxidation (AO) process for the production of hydrogen peroxide in China and abroad. The characteristics and differences between the fixed-bed and fluidized-bed reactors for the AO process are presented. The detailed comparison indicates that the production of hydrogen peroxide with the fluidized-bed reactor has many advantages, such as lower operation cost and catalyst consumption, less anthraquinone degradation, higher catalyst utilization efficiency, and higher hydrogenation efficiency. The key characters of the production technology of hydrogen peroxide based on the fluidized-bed reactor developed by the Research Institute of Petroleum Processing, Sinopec are also disclosed. It is apparent that substituting the fluidized-bed reactor for the fixed-bed reactor is a major direction of breakthrough for the production technology of hydrogen peroxide in China.

Keywords： anthraquinone process     fixed-bed reactor     slurry-bed reactor     hydrogen peroxide    

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Title Author Date Type Operation

Preparation of composite abrasives by electrostatic self assembly methodand its polishing propertiesin Cu chemical mechanical polishing

Huang Yishen,Xu Xuefeng,Yao Chunyan,Hu Jiande and Peng Wei

Journal Article

Experimental study on slurry-induced fracturing during shield tunneling

Teng WANG, Dajun YUAN, Dalong JIN, Xinggao LI

Journal Article

Review on mechanism and process of surface polishing using lasers

Arun KRISHNAN, Fengzhou FANG

Journal Article

Numerical analysis of hydrodynamic process of circular-translational-moving polishing (CTMP)

ZHAI Wenjie, LIU Changxiong, LIANG Yingchun

Journal Article

Advances in polishing of internal structures on parts made by laser-based powder bed fusion

Journal Article

Experimental study on high-efficiency polishing for potassium dihydrogen phosphate (KDP) crystal by using

Ziyuan LIU, Hang GAO, Dongming GUO

Journal Article

Copper fractal growth during recycling from waste printed circuit boards by slurry electrolysis

Journal Article

Kinetic study of hydrodesulfurization of coker gas oil in a slurry reactor

Haiding XIANG, Tiefeng WANG

Journal Article

Experimental study on the stratum applicability and mechanisms of bubble–slurry for earth pressure balance

Journal Article

Study on direct alcohol/ether fuel synthesis process in bubble column slurry reactor

Zhen CHEN, Haitao ZHANG, Weiyong YING, Dingye FANG

Journal Article

Numerical simulation on flow of ice slurry in horizontal straight tube

Shengchun LIU,Ming SONG,Ling HAO,Pengxiao WANG

Journal Article

Development and demonstration plant operation of an opposed multi-burner coal-water slurry gasification

WANG Fuchen, ZHOU Zhijie, DAI Zhenhua, GONG Xin, YU Guangsuo, LIU Haifeng, WANG Yifei, YU Zunhong

Journal Article

Application of gamma-ray attenuation technology in density measurement of a slurry reactor

Jian XU, Weisheng WEI, Kai ZHANG

Journal Article

Research and application on separation technology of slurry and water under sandy-gravel stratum

Wang Guangyu,Sun Shanhui,Su Qinggui

Journal Article

Advances in the slurry reactor technology of the anthraquinone process for H

Hongbo Li, Bo Zheng, Zhiyong Pan, Baoning Zong, Minghua Qiao

Journal Article