Patent ID: 8568543

Claim:
A method for making an explosive composition comprising: providing an end-to-end level blender; and using the end-to-end level blender to blend an emulsion explosive and ammonium nitrate or ANFO to produce Heavy ANFO; wherein the end-to-end level blender comprising a mixer tank for holding at least two different materials that are to be blended together, the mixer tank having a side wall and a bottom wall that engages the side wall; a rotary structure for use in contacting at least two different materials within the mixer tank to facilitate the blending of the at least two different materials, the rotary structure having a first shaft with a first axis of rotation that intersects the side wall at a first pair of locations and a second shaft with a second axis of rotation that is substantially parallel to the first axis of rotation and intersects the side wall at a second pair of locations that is different than the first pair of locations; and a drive system for applying a first rotational force to the first shaft and a second rotational force to the second shaft such that the first and second shafts rotate at different rotational speeds at the same time.