Search

Copyright of Telecommunications Science is the property of Beijing Xintong Media Co., Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Rural Water & Hydropower is the property of China Rural Water & Hydropower Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Shanghai University / Shanghai Daxue Xuebao is the property of Journal of Shanghai University (Natural Sciences) Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Tianjin Medical Journal is the property of Tianjin Medical Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Engineering Geology / Gongcheng Dizhi Xuebao is the property of Journal of Engineering Geology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The charging system of COREX melter gasifier consists of one coal-gimbal distributor and eight DRI-flap distributors. As the DRI-flag distributor is a new type of distributor， few research is found to help to understand the charging process of DRI-flap distributor in depth. In this study， a mathematical model of charging process of the DRI-flag distributor was developed based on discrete element method and was used to investigate the effect of operating parameters during charging process. The relationship between the flap angle and radial position was obtained when studying the effect of flap angle on the landing position. After examing the formation process and internal segregation of the stock pile， the size segregation in the radial direction was revealed. Meanwhile， the distribution of ore and coke in the radial direction was given during their mixture charging process. These modeling results can guide us to adjust charging mode in COREX production field. [ABSTRACT FROM AUTHOR]

A mathematical model based on discrete element method (DEM) was developed to investigate the behaviors of solid particulate motion in a COREX shaft furnace model from particle-scale view. The solid flow pattern and transient features of burden were simultaneously analyzed， especially the transient behavior of velocity and stress distribution were calculated. The results showed that the solid flow in COREX shaft furnace can be divided into three different flow regions: plug flow zone， quasi-stagnant zone and converging flow zone. The transient behavior of velocity distribution indicates that there are two types of velocity waves in the furnace. One is a downward wave caused by charging and the other is upward from bottom caused by discharging. The normal stress has a minor change with time. A high stress field exists on the top of the guiding cone， while for the furnace without guiding cone， the particles in the lower central zone present strong normal stress. On the contrary， the particles exhibit weak normal stresses in the converging flow zone. [ABSTRACT FROM AUTHOR]