ANFO products are based on a mixture of prilled ammonium nitrate (AN) and fuel oil (FO). ANFO mixed with special additives may be suitable for applications where water resistance or adhesion to upwelling holes is required.
ANFO is bulk explosives that are used as a pipecharge in blasting both above and below ground. There are four different types of ANFO that suit a variety of conditions and applications.
- ANFO is intended for loading into dry boreholes. This product is not waterproof, making it unsuitable for wet boreholes.
- ANFO 800 is less dense than conventional ANFO, which also results in a lower charge concentration.
- ANFO WR (AHTI-ANFO) is relatively moisture resistant. ANFO WR can be loaded into wet holes after the water has been pumped out.
- ANFO UP-HOLE (PITO-ANFO) is specifically designed for charging up-hole applications.