LI Tianhe，FU Haifeng，LIN Longyuan，QIN Wenqian，CHEN Jundong

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

Abstract:To solve the situation about time-consuming and labor-intensive,and large grain size in the pulverization technology of silicon carbide,the pulverization ability of superheated steam was analyzed through experiments,and the yield and energy consumption of three superfine pulverization methods of normal temperature air,high temperature air and superheated steam were evaluated. The results show that a good particle size distribution of submicron silicon carbide can be achieved applying superheated steam. When the speeds of the classifier are 1 800 and 2 700 r/min,the particle size d50 of silicon carbide is 4.304 and 2.387 μm accordingly,and the corresponding output reaches 12 and 7.2 kg/t,respectively. Besides,rising the steam temperature from 200 to 300 ℃,the yield could be obviously increased,from 4.9 to 7.2 kg/h. Moreover,under the same operation conditions,the energy consumption is 2 165.1、1 569.4、952.9 kg standard coal applying normal temperature air(25 ℃),high temperature air (300 ℃)and superheated steam(300 ℃)to ultra-fine 1ton silicon carbide powder (d50=4.7 μm),respectively. Thus,the ultra-fine processing of silicon carbide by steam jet mill can obtain finer product with a higher output compared with the conventional methods,and the equipment is more energy-saving.

Keywords:steam jet mill；super fine crushing；superheated steam；high temperature air；energy consumption

中图分类号：TQ051.1                             文献标志码：A

文章编号：1008-5548(2020)01-0017-05

DOI:10.13732/j.issn.1008-5548.2020.01.003

收稿日期： 2019-05-29，修回日期：2019-06-13，在线出版时间：2019-07-25 16:15。

基金项目：国家自然科学基金项目，编号：11402218；四川省科技计划项目，编号：2018JY0438；四川省教育厅重点项目，编号：18ZA0498。

第一作者简介：李天翮(1995—)，男，硕士研究生，研究方向为超细分级设备。E-mail：466928461@qq.com。

通信作者简介：林龙沅(1981—)，男，副教授，研究方向为超细粉碎分级设备与工业通风除尘技术。E-mail：LLy7572@126.com。