Effect of monoammonium phosphate on the thermal stability and detonation characteristics of ammonium nitrate

摘要

A study has examined the effect of Monoammonium phosphate (MAP) on the thermal stability and detonation characteristics of ammonium nitrate (AN). The thermal stability and shock sensitivity of AN and ammonium nitrate fuel oil (ANFO) were investigated by differential scanning calorimetry (DSC), the Cook-off test, the Koenen test and UN Gap test. The results show that MAP can increase the thermal stability of AN and ANFO and the water content affected the thermal stability of AN-MAP mixtures. However, ANFO-45wt. % MAP mixtures can still produce a steady detonation in the UN gap test. MAP cannot effectively reduce the shock sensitivity of ANFO. Possible explanations for these results are discussed.