Article Information
Selective Flocculation of Dilband Iron Ore, Pakistan


Mehran University Research Journal of Engineering & Technology

Volume 30 ,  Issue 2

Muhammad  Ishaque  Abro,Abdul  Ghani  Pathan,Abdul  Hakeem  Mallah


Selective flocculation for long is known as one of the beneficiation techniques applicable to the concentration of finely disseminated ores. The success of this technique is based on the selective adsorption of an organic polymer on the mineral particles to be flocculated. In present study beneficiation of finely disseminated Dilband iron ore using selective flocculation has been attempted. The effect of pH, sodium silicate (Na2SiO3), sodium hexametaphosphate (Na2OP2O5), sodium trypolyphosphate (Na5P3O10), ethylediaminetretracetae (NaCH2-CH2N), flocculant doses, and flocculant mixing method on the selective adsorption of corn starch on hematite, the chief iron mineral, was studied comprehensively. Improvement in grade was assessed by XRF analysis of the flocculation products. The selective flocculation upgraded the ore from 52% hematite (i.e. 39% Fe) to 60% hematite (i.e. 45% Fe) with an average hematite recovery of 15%. Appreciable increase in ore grade with sufficiently poor recovery suggested that selective flocculation process is not adequate beneficiating technique to upgrade the Dilband iron ore due to heavily intergrowth of impurities.