摘要：为解决碳化硅粉碎时耗时耗力、成品粒径较大的问题,通过实验对过热蒸汽的粉碎能力进行分析,对常温空气、高温空气、过热蒸汽3种超细粉碎方式的产量与能耗进行评估。结果表明:实验系统使过热蒸汽制备的亚微米级碳化硅具有良好的粒径分布,分别调节分级机转速为1 800、2 700 r/min,碳化硅的粒径d50分别为4. 304、2. 387μm,产量分别为12、7. 2 kg/h;分别改变蒸汽温度为200、300℃时,产量对应为4. 9、7. 2 kg/h;在相同的参数条件下,使用常温空气(25℃)、高温空气(300℃)以及过热蒸汽(300℃)制备1 t碳化硅粉体(d₅₀约为4. 7μm),标准煤能耗分别为2 165. 1、1 569. 4、952. 9 kg。

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 ultrafine 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