In the first stage, SierraMin is planning to produce dry beneficiated bauxite by installing crusher, dryer and appropriate sizes of vibrating screens to remove 5 to 10mm fines rich in Kaolinite content. The general specification of this dry beneficiated bauxite is presented in the table given below.
Specification of Dry Processed Bauxite of SierraMin
|Items||Dry Beneficiated BauxiteTypical DSO|
|Chemical (% w/w)||%|
|Total Alumina (Al2O3)||44-46|
|Total Silica (SiO2)||3.0-4.0|
|Iron Oxide (Fe2O3)||22-26|
|Titanium Dioxide (TiO2)||2-3|
|Loss on Ignition (LOI)||22.5-23.5|
|Total Organic Carbon (TOC)||0.013|
|Assumed Moisture (%)||6-8%|
|Mineralogical (% w/w, dry basis)|
In the second phase (say after 2 years of DSO export), wet beneficiation system will be installed at Central pad and much better quality washed bauxite will be available for export.