Beneficiation of Low-Grade Limestone Sample

Rao, D S and Vijaya Kumar, T V and Subba Rao, S and Bhaskar Raju, G and Prabhakar, S (2011) Beneficiation of Low-Grade Limestone Sample. Mining Science and Technology, 21 . pp. 631-636.

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Pilot scale column flotation studies were conducted on a low grade siliceous limestone ore. Silica content was reduced to less than 1% in the concentrate so that it became satisfactory for use in the paper or rubber industries. The limestone sample was crystalline and constituted primarily of calcite that contained quartz, feldspar, pyroxene, and biotite as gangue minerals. Quartz is the major silicate gangue whereas feldspar, pyroxene, and biotite exist in minor to trace quantities. Traces of pyrite were also observed within the sample. A reverse flotation process was adopted where the silicate gangue minerals were floated using two different commercial cationic collectors: Chem-750 F or Floatamine-D. The studiesclearly suggest it is possible to produce a limestone concentrate assaying around 96–97% CaCO3 containing less than 1% SiO2. The effect of feed flow rate, percent solids, froth depth, and wash water on the grade and recovery of the CaCO3 concentrate is discussed

Item Type:Article
Official URL/DOI:doi:10.1016/j.mstc.2011.10.012
Uncontrolled Keywords:Low grade limestone,Reverse flotation,Column flotation, Cationic collector
Divisions:NML Chennai > Mineral Processing
ID Code:4397
Deposited By:Dr. G Bhaskar Raju
Deposited On:14 Dec 2011 10:31
Last Modified:14 Dec 2011 10:32

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