Health & Environmental Research Online (HERO)


Print Feedback Export to File
8371332 
Journal Article 
Separation of RDX and Aluminum Components from Waste TNT/RDX/Al Explosive by Density Classification Method 
Zhang, SX; Wang, YF; Tong, Y; Huang, FL 
2020 
43 
2 
155-160 
Chinese 
In order to study the efficient and low-cost physical method of separating and recycling the components of TNT/RDX/Al explosive, the component of TNT was recovered by controlling-temperature centrifugation and controlling-temperature washing and recrystallization, and the RDX and aluminum powder were separated by density classification according to the different densities between RDX and aluminum powder. The separation conditions were optimized. The recovered materials were characterized by DSC and XRD, and their impact sensitivities were tested. The results show that the recovery rates of RDX and aluminum powder were 67.6% and 86.5%, with the purities of 77.2% and 94.6%, respectively under the condition of zinc bromide solution (density of 2.0g/cm3), reaction temperature 30℃ and centrifugal speed 2500r/min. The recovered RDX has good thermal stability, containing a small amount of aluminum powder and TNT-RDX eutectic, and basically there is no independent TNT, and its impact sensitivity is 90%. The recovered aluminum powder contains trace amounts of alumina powder and explosive components. There is no zinc bromide in either of the recovered components. This physical method adopted can effectively realize the efficient and green recovery of various components from waste TNT/RDX/Al explosive. © 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved. 
Applied chemistry; Density classification method; Recovery rate; Waste TNT/RDX/Al explosive