Iron-silicate fines specification 1. Chemical composition [on dry basis] Element Fe typical 46.00 % range (44· 48 %) sio2 27.00 % (26· 28 %) al2o3 3.20 % (2.7· 3.7 %) cao 1.80 % (1.3· 2.5 %) mgo 0.70 % (0.6· 1.1 %) zn 1.50 % (0.9· 2.8 %) cu 0.42 % (0.36· 0.48 %) s 0.36 % (0.25· 0.55 %) as 0.05 % (0.03· 0.09 %) cl 0.004 % (0.0019· 0.0075) %) c 0.019 % (0.008· 0.043 %) 2. Moisture typical 10% 3. Mineralogical and phase characteristics Iron minerals: magnetite (14· 28 %), iron silicates such as fayalite and piroxene. Iron phases: fe (ii) 32· 38 % and fe (iii) 8·14 %. Silica minerals: silica is presented as free quartz, iron and other silicates. Copper minerals: copper is presented in all forms. 4. Grain size distribution Percentage grain size 0 % > 200 micron < 10 % 200· 71 micron < 25 % 71· 40 micron < 25 % 40· 20 micron > 50 % < 20 micron 5. Physical properties Specific density: approx. 3.8 g/cm bulk density: approx. 2.4 g/cm color: anthracite / grey-black appearance: fines
