超细粉体静电特性实验与危害防范研究

发布时间：2018-03-05 09:06

本文选题：静电灾害　切入点：粉体材料　出处：《南京理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：为了研究粉体工业生产过程中的静电危险性,本文通过测定粉体材料的电阻率参数及影响规律、设计粉体物料静电积累过程模拟实验的方法对工业生产过程中的静电特性进行了研究。首先,通过粉体电阻率测试装置研究了粒径对石英砂、RDX、HMX电阻率的影响,分析了不同测试方法及粉体物理参数等对试验结果的影响；然后,通过静电滑槽实验研究了样品质量、滑槽长度、滑槽倾斜角度、滑槽材质和加料速度对于静电电荷积累量的影响；通过过筛实验,研究了样品质量、标准筛孔径对玉米粉、小麦粉、RDX静电电荷积累量的影响,研究了含水量对玉米粉、小麦粉静电电荷积累量的影响,研究了样品粒径对RDX、HMX静电电荷积累量的影响；同时还通过静电火花感度实验,分析了超细化处理对RDX静电火花感度的影响。实验结果表明,粉体静电电荷积累量与样品质量存在线性增长关系。同时,粉体经滑槽摩擦之后的静电电荷积累量随着加料速度的增加而减小,随着滑槽长度的增长而增大。粉体中的水分对摩擦起电静电电荷积累起到明显的抑制作用。粉体粒度越小,静电电荷积累越明显。不同测试装置下,粉体材料的电阻率大小并不相同。使用三极圆环法测得的电阻率值与两极试验槽法所得结果相比小一个数量级。粉体材料的电阻率随粉体粒径的减小有明显的增大趋势。RDX经超细化处理之后的静电火花感度较工业级状态下更低。最后,根据模拟实验研究的结果与结论,本文进一步对粉体工业生产过程中的静电带电体进行了分析,比较了不同静电放电类型的放电特点与引发条件,预测了粉体工业生产中可能出现的静电危害。针对论文的测试和分析结果,从减少静电产生和实现静电充分消散两方面,系统地提出了一些用于工业生产过程中预防静电危害的对策措施,论文工作、结论能为粉体工业生产过程中的静电危害预防和治理提供参考和帮助。
[Abstract]:In order to study the electrostatic hazard in the process of powder production, the resistivity parameters and the influence law of powder materials were measured. The electrostatic characteristics in industrial production process were studied by designing a simulation experiment of electrostatic accumulation process of powder materials. Firstly, the influence of particle size on the resistivity of quartz sand RDX HMX was studied by means of the powder resistivity test device. The influence of different testing methods and physical parameters of powder on the test results was analyzed, and then the sample quality, chute length and sloping angle of the chute were studied by the electrostatic chute experiment. The effects of sample quality and standard sieve aperture on electrostatic charge accumulation of corn flour and wheat flour RDX were studied by sifting experiments. The effect of sample size on electrostatic charge accumulation of wheat flour was studied, and the effect of superfine treatment on RDX electrostatic spark sensitivity was also analyzed. The electrostatic charge accumulation of powder increases linearly with the sample quality, and the electrostatic charge accumulation decreases with the increase of feeding speed. With the increase of the length of the chute, the water in the powder obviously inhibited the electrostatic charge accumulation. The smaller the particle size of the powder, the more obvious the electrostatic charge accumulation. The resistivity of powder material is not the same. The resistivity value measured by three-pole ring method is one order of magnitude smaller than that obtained by two-pole test tank method. The resistivity of powder material increases obviously with the decrease of powder particle size. The electrostatic spark sensitivity of RDX after ultrafine treatment is lower than that of industrial grade. Finally, Based on the results and conclusions of the simulation experiments, the electrostatic charge in powder industrial production is further analyzed, and the discharge characteristics and initiation conditions of different electrostatic discharge types are compared. The possible electrostatic hazards in powder industrial production are predicted. In view of the test and analysis results of the paper, the static electricity is reduced and the static electricity is fully dissipated. Some countermeasures and measures for the prevention of electrostatic hazards in industrial production are put forward systematically. The work of the paper can provide reference and help for the prevention and treatment of electrostatic hazards in powder industrial production.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB383.3

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