Research Of Anti-detonation Property Tests And Criteria For Farming Ammonium Nitrate

To avoid ammonium nitrate(AN) been used on illegal blasting or criminal, industrialammonium nitrate is forbidden to sale freely in our country. But been one kind of theimportant fertilizer, farming AN is needed widely. So our government require someinstitutes and factories to research non-explosity AN. But there isn't a standard to measurethe anti-detonation property of farming AN. Based on large testing data, this paper give thestandard to measure the anti-detonation property.Based on the condition of AN been used on producing explosives illegally, thetesting condition is confirmed: We use the formula of 2#ANFO as the standard formula.The pellet diameter of AN is between 0.90mm and 0.30mm 50%, less than 0.30mm50%. The charge density is 0.85g·cm^-3～0.89g·cm^-3. The charge diameter is 80mm. Thestandard detonator to test the anti- detonation AN is also been studied by testing.Stimulating the facts of explosive criminals,we designed four testing methods:"detonator sensitivity testing method", "fortified detonator sensitivity testing methodⅠ","fortified detonator sensitivity testing methodⅡ" and "fortified sensitivity testing methodⅢ". To defend the mordern explosive criminal, we confirm the "fortified detonatorsensitivity testing methodⅢ" as the standard method. The on site blasting result show thatthe 2#ANFO which oxidant is anti- detonation AN can not be useed on blasting effectly.To insured the safety of transporting and stocking,we test the explosity of farmingAN that passed the testing of "fortified detonator sensitivity testing methodⅢ"(non-explosity AN) by UN testing standard.The result show that this kind of farm ANhas no explosity. But the 2#ANFO contained it has explosity also. We also tested themixture of urea sulfate, urea phosphate or sodium cholorate with AN. The result show thatproducing compound fertilizer contained AN is an efficient way to modify AN.