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初中生对于可燃性粉尘引起的爆炸，由于缺乏有效的验证难以理解。通过“尘炸实验”的演示，彻底解决了这一难题，教学效果非常好。１实验装置的制作及演示如图１所示：在一块木板上挖一圆洞塞以单孔胶塞用来固定玻璃漏斗，漏斗旁适宜位置放入一支燃着的蜡烛，漏斗内放少许干面
The explosion caused by flammable dust in junior high school students is difficult to understand due to lack of effective verification. Through the demonstration of “Dust Explosion Experiment”, this problem was completely solved and the teaching effect was very good. 1 The production and demonstration of the experimental device is shown in Fig. 1. Digging a round hole plug on a wooden board uses a single-hole rubber plug to fix the glass funnel. Place a burning candle next to the funnel. Place a little in the funnel. Dry noodles