ANFO products are based on a mix of ammonium nitrate (AN) prills and fuel oil (FO). ANFOs mixed with special additives can lend themselves for use in applications where water resistance or adherence to up-holes is required.
ANFOs are bulk explosives used as a column charge in both open-cut and underground blasting. There are four different types of ANFOs, which are suitable for a variety of conditions and applications.
- ANFO is intended to be loaded into dry boreholes. This product is not water resistant, which makes it unsuitable for wet boreholes.
- ANFO 800 is less dense than the conventional ANFO, which also translates into a smaller charge concentration.
- ANFO WR (AHTI-ANFO) is relatively resistant to moisture. ANFO WR can be loaded into wet holes after pumping out the water.
- ANFO UP-HOLE (PITO-ANFO) is specially designed for charging up-holes.