Patent ID: 9174887
Filing Date: 2015-11-03
Classification: C06B

Abstract:
1. A method of preparing heavy ANFO comprising: loading high density ammonium nitrate into a hopper; feeding the high density ammonium nitrate into a mixing chamber, during the feeding step, injecting fuel into a high density ammonium nitrate feeding pipe, thereby obtaining ANFO; loading bulk emulsion into a hopper; gassing the bulk emulsion; feeding the gassed bulk emulsion into a same mixing chamber as the ANFO; mixing the gassed bulk emulsion and the ANFO, thereby obtaining heavy ANFO; and wherein the high density ammonium nitrate includes a bulk density in the range of 0.95-1.00 kg/L, an oil absorbency of less than or equal to 4%, and a crushing strength of 0.4-0.6 kg.