关键词: 塑料粘结炸药, 共振声混合, 混合工艺, 混合均匀性

Abstract: In order to obtain the resonance acoustic mixing process rule and achieve the efficient mixing of plastic bonded explosive (PBX) under the conditions of safety and low energy consumption, the effects of mixing acceleration and time on mixing process are studied for PBX simulant with 88% solid content. In the experiment, a 5 kg scale resonant acoustic mixer is used, the sample scale is 1 500 g, and the mixing acceleration varies from 0 g to 60 g (g=9.8 m/s²). The experimental results show that the material state changes with the mixing time, and the different minimum mixing accelerations are required for different material states. According to the typical material state in the mixing process, the mixing process is divided into five zones: granule mixing zone, granule-liquid mixing zone, cohesion spheroidizing zone, viscoelastic mixing zone and fluidizing zone. The material is premixed in previous three stages under a relatively safe condition, and is micro-mixed in viscoelastic and fluidizing mixing zones in the whole flow field; according to the required minimum mixing acceleration, three key points are defined: mixing point, aggregation point and fluidization point. Generally, the three key points increase successively, and they are about 10 g, 25 g and 40 g, respectively. The mixing process can be used to guide the resonance acoustic mixing process of PBX and other materials with highly viscous and highly solid content. Key

Key words: plasticbondedexplosive, resonanceacousticmixing, mixingprocess, mixinguniformity