基于粒径D50和结晶度的小麦秸秆超微粉碎工艺优化

Mechanical fragmentation is an important pretreatment method for lignocellulosic biomass transformation. In this paper, ultrafine vibration ball mill was used to obtain the optimized process conditions of ultrafine grinding wheat straw through single factor trial and orthogonal experiment design. The effects of grinding time, filling rate of milling ball and volume ratio of ball to sample on the particle size D50 and crystallinity of wheat straw powder were analyzed. The optimized process conditions of ultrafine grinding wheat straw were grinding time 1.5 hour, filling rate of milling ball 35% and volume ratio of ball to sample 2.5. The particle size D50 and crystallinity of wheat straw powder was 6.71 μm and 12.86% respectively when wheat straw ultrafine ground under the optimized process conditions.