Study on electrostatic electrification characteristics of CL 20 based on chute test

DOI:	10.11809/bqzbgcxb2025.03.008
Keywords:	CL 20; electrostatic chute; charge mass ratio; particle size; electrostatic characteristic
Abstract:	In order to study the electrostatic charging characteristics of energy containing material hexanitrohexazazane (CL 20), a series of electrostatic charging and accumulation tests were carried out on CL 20 with different particle sizes based on chute test method. The effects of chute material, chute length, sample particle size and coating treatment on the electrostatic charging characteristics of CL 20 were analyzed and compared. The risk of CL 20 electrostatic discharge spark is analyzed by theoretical and numerical simulation. The results show that compared with polymer chute, metal chute can bring more static energy to CL 20. The length of the chute and the particle size of the sample have obvious effects on the charge carrying capacity. The charge carrying capacity of the sample with particle size less than 25 μm is more than 1.6 times that of the sample with particle size greater than 120 μm. The coated CL 20 has good antistatic effect, among which the coating effect of polyurethane is more obvious for metal chute and polymer chute. According to the cloud map of electrostatic field and potential distribution in CL 20 storage silo, the maximum field strength in the silo reaches 9.26×106 V/m, and the maximum potential reaches 485 kV, so the risk of electrostatic discharge is very high. Under normal circumstances, the discharge sparks of various conductors are enough to ignite CL 20. The research provides data reference and theoretical basis for the production or use of CL 20 to improve electrostatic safety protection, and has practical significance.
Issue:	Vol. 46 No. 3 (2025)
Published:	2025-03-31
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