Granular (Coarse) Magnesium Oxide


Causmag® Granomag® AL7 is an accurately sized granular reactive calcined magnesite with excellent flow properties and is fines-free to reduce dustiness in handling.


Causmag® Granomag® AL7 is mainly used in balanced fertilizer formulations and custom mixes as a slow release high grade magnesium source. AL7 is used for animal feed and as a rumen buffer in feed grain supplements. AL7 is used to supplement sheep and cattle diets where Magnesium levels may be low. Magnesium has a role in metabolism, formation of bone and teeth as well as maintenance of nervous function. AL7 is used extensively in Australian dairies, where mechanical feeding systems are preferred.


Typical Specification
Magnesium Oxide (MgO)% Ignited Basis 97.6 96.0 min
Calcium Oxide (CaO) % 1.0 1.7 max
Silica (SiO2) % 1.0 1.7 max
Iron Oxide (Fe2O3) % 0.2 0.3 max
Aluminium Oxide (Al2O3) % 0.2 0.3 max
Loss on ignition % 2.0 3.5 max
Magnesium (Mg) 58.5 57.8 min
As < 0.5 ppm
Cd < 0.1 ppm
Hg < 0.01ppm
Pb < 0.5 ppm

Physical Properties

Bulk Density, loose, kg/m3 (lb/ft3) 800 (50) N/A
Mean particle size, granules 3 mm 0.5-5.0mm
Neutralizing Value 220 N/A
Screen size, % passing 5 milimeter 100 95.0
Screen size, % passing 0.5 milimeter Nil 5


42 bags/pallet – small bags, 25 kg (small), 1,000 kg or 1,200kg bulk bags

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