TENG Deliang， LI Peng, YUAN Na, LYU Juan, CHEN Jundong, LIN Longyuan, CHEN Haiyan

(School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, China)

Abstract: In order to improve the tap density of spherical graphite, the spheroidization experiment of ground natural graphite was carried out by LNP-18A spheroidizer. The effects of four different conditions on the spheroidization of graphite were discussed, including the rotation speed of spheroidizing wheel, air volume, rotation speed of classification wheel and spheroidization time. The results show that when the speed of the spheroidization wheel is 3 600～6 000 r/min, the reduction of the particle size is due to the spheroidization effect rather than grinding, which narrows the particle size distribution and increases the tap density. When the air volume increased by 57.1%, the yield rate decrease by 7% and D10 increase by 11.43%. With the increase of the rotation speed of the classification wheel, D10 and Dmax decreased significantly, and the yield increase by 8%, while the tap density does not change much. The tap density of spherical graphite increase by 97.19% after spheroidization for 180 min, while the content of fine-grained particles first decrease and then increase. When the spheroidizing wheel rotates at 6 000 r/min, the grading wheel rotates at 3 900 r/min, the air volume is 4.54 m3/min, the tap density of 2 kg material spheroidizes for 180 min reaches 0.913 g/cm3, and the yield reaches 67%.

Keywords: natural graphite; spherize; tap density; yeild

中图分类号：TD97

文献标志码：A

文章编号：1008-5548(2021)04-0070-07

DOI:10.13732/j.issn.1008-5548.2021.04.009

收稿日期： 2021-02-07， 修回日期：2021-02-25，在线出版时间：2021-06-01 11:37。

基金项目：四川省应用基础研究基金项目，编号：2018JY0438。

第一作者简介：滕德亮(1993—)，男，硕士研究生，研究方向为矿物加工工程。E-mail：460198538@qq.com。

通信作者简介：陈海焱(1964—)，男，博士，教授，博士生导师，研究方向为气流粉碎、气流分级与通风除尘技术。E-mail：chenhai-yan@163.com。