Anfos are based on a mix of prilled ammonium nitrate and fuel oil. The Anfos are explosives for mass blasting, which are used outside populated areas as column charges as well as in tunnel blasting. In addition to the basic Anfo explosives, we have developed other Anfo types for different circumstances and applications.
Anfo is not water-resistant, making it unsuitable for water-filled boreholes. The material’s density is approx. 0.87-0.95 kg / dm3.
Anfo WR is relatively moisture-resistant. Anfo WR can be charged in water holes, provided that the water is extracted before charging. The material’s density is approx. 0.85-0.95 kg / dm3.
Anfo up-hole features improved adhesive qualities for up-hole applications. Anfo up-hole is typically used in the mining industry. The material’s density is approx. 0.9 kg / dm3.
Anfo 800 has a lower specific weight, but a higher detonation velocity than a basic Anfo. These features are applicable to both tunnelling and open-cut excavations. The reduced over-charging helps reduce explosive material costs. The material’s density is approx. 0.8 kg / dm3.
Anfo explosives require an effective primary charge to secure the ignition. Suitable primary charges include, e.g. Redex, Fordyn, Kemix A and Forprime. The use of detonating cords is not recommended for boreholes charged with Anfo. Anfo can be charged either by pouring directly from sack or with a blasthole charger. Drifting and up-hole pouring requires the use of a blast hole charger.