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| 1 | Liberation characteristics of coal middlings comminuted by jaw crusher and ball mill显示文摘The associated minerals make coal middlings possess a relatively high ash content.Subsequent liberation through size reduction can cause recovery increase.However,effect of comminution facilities on mineral liberation of middlings was ignored.This paper studied the liberation characteristics of middlings crushed with different kinds of fragmentation forces.Middlings of 3 mm+0.5 mm sampled from a dense medium cyclone were comminuted by a jaw crusher and a ball mill to 0.5 mm with similar size distribution respectively.The generating mechanism of fnes was also analyzed.Full densimetric analyses indicate that mineral liberation of the product crushed by the jaw crusher is better than that by the ball mill at each fraction.For sizes of 0.125 mm+0.074 mm and 0.074 mm,yields of the product with ash content 11%comminuted by jaw crusher are nearly 20%higher than that by the ball mill.Sectional micrographs observed by the scanning electron microscopy(SEM)also show the same law for these two fractions and some intergrowth particles still exist in the fraction of 0.5 mm+0.25 mm. | Xie Weining He Yaqun Zhu Xiangnan Ge Linhan Huang Yajun Wang Haifeng | 2013 | International Journal of Mining Science and Technology2013，23，5： | 12 |
| 2 | Size distribution of wet crushed waste printed circuit boards显示文摘A wet impact crusher was used to breakdown waste printed circuit boards (PCB's) in a water medium. The relationship between the yield of crushed product and the operating parameters was established. The crushing mechanism was analyzed and the effects of hammerhead style, rotation speed, and inlet water volume on particle size distribution were investigated. The results show that the highest yield of 1 + 0.75 mm sized product was obtained with an inlet water volume flow rate of 5.97 m 3 /h and a smooth hammerhead turning at 1246.15 r/min. Cumulative undersize-product yield curves were fitted to a nonlinear function: the fitting correlation coefficient was greater than 0.998. These research results provide a theoretical basis for the highly effective wet crushing of PCB's. | Tan Zhihai He Yaqun Xie Weining Duan Chenlong Zhou Enhui Yu Zheng | 2011 | Mining Science and Technology2011，21，3： | 4 |
| 3 | Triboelectric properties of ilmenite and quartz minerals and investigation of triboelectric separation of ilmenite ore显示文摘Triboelectric separation, as an entirely dry technology, is a prospective method to process fine minerals.The aim of this paper is to investigate the performance of triboelectric separation of ilmenite and quartz minerals in a lab unit and to get ready for the separation of ilmenite ore. A tribocharge measurement system was used to test the triboelectric properties of ilmenite and quartz particles with tribochargers respectively made of PVC, PPR, PMMA, Teflon, copper, stainless steel and quartz glass. The results show that the ilmenite particles charged positively while quartz charged negatively when tribocharged with PVC tribocharger. The mixture of 12% ilmenite and 88% quartz was prepared for the triboelectric separation. The recovery of ilmenite increases with the increase of airflow rate, decreases with the increasing feed rate, and grows up firstly and then decreases with the increasing voltage. A maximum ilmenite recovery of 51.71% with ilmenite content 32.72% was obtained at 40 m^3/h airflow rate, 6 g/s feed rate and 20 kV voltage. According to the optimal parameters of the separation of ilmenite and quartz mixture,fine ilmenite ore with 7.55% Ti content was beneficiated using the unit and the Ti content increased to 12.32% in concentrate product. | Yang Xing Wang Haifeng Peng Zhen Hao Juan Zhang Guangwen Xie Weining He Yaqun | 2018 | International Journal of Mining Science and Technology2018，28，2： | 2 |
| 4 | High Voltage Digital Transient State Measuring System显示文摘This paper presents main functions of a high voltage,high speed and extensive memory transient measurementequipment and design of associate hardware and software. Thepaper also introduces the hardware design of high speed hugememory data sampler, explains the know-how of data analysissoftware, program-controlled voltage divider andanti-interference measurement, with which the equipmentperforms excellent on--site.This equipment reallies automatic measurement and satisfiesthe requirement of high voltage digital measurment. | Wu Weining Chang Wenliang Xu Yong Li Jianjian Mei Cang RongJiangang(Wuhan Research Institute of High Voltage Technology, State Power Corporation)Yao Zonggan(Central China University of Technology)Xie Jing(Fujian Electric Power Testing & Research Insti | 1999 | Electricity1999，，3： | 0 |
| 5 | Improved comprehensive performance of CsPbI_(2) Br perovskite solar cells by modifying the photoactive layers with carbon nanodots显示文摘Introducing additives into perovskite layers is an effective method to enhance the power conversion efficiency(PCE)and operation stability of perovskite solar cells(PSCs).Herein,we reported an addition of carbon nanodots(CNDs)into the CsPbI_(2) Br photoactive layer to boost performance of the related PSCs.It is found that the trap density can be notably suppressed,and the crystallinity can be enhanced after introducing CNDs with an optimal quantity.The PSC with 1.0 wt%addition of CNDs delivers a notable improved average PCE of 13.77%(the highest PCE:14.69%)from that of 12.14%for the control device without CND addition.Moreover,the CND-added CsPbI 2 Br PSCs exhibit superior stability,i.e.,~86% retention of the initial PCE after 160 h aging in air with the humidity of 20%-30%,to the control device. | Yanzhou Wang Caidong Xie Xincheng Yao Qiulu Chen Weining Liu Yujun Fu Qiming Liu Junshuai Li Yali Li Deyan He | 2022 | Journal of Materiomics2022，8，2： | 0 |
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