Beneficiation of Low Grade Limestone from Madukkarai, Coimbatore District, Tamil Nadu, India
International Journal of Mineral Processing and Extractive Metallurgy
Volume 2, Issue 1, January 2017, Pages: 1-6
Received: Aug. 29, 2016;
Accepted: Sep. 10, 2016;
Published: Apr. 22, 2017
Views 1956 Downloads 116
B. P. Ravi, Mineral Processing Department, VSKU PG Centre, Nandihalli, Sandur, India
S. J. G. Krishna, Mineral Processing Department, VSKU PG Centre, Nandihalli, Sandur, India
M. R. Patil, Mineral Processing Department, VSKU PG Centre, Nandihalli, Sandur, India
C. Rudrappa, Mineral Processing Department, VSKU PG Centre, Nandihalli, Sandur, India
P. S. Kumar, Mineral Processing Department, VSKU PG Centre, Nandihalli, Sandur, India
V. Rampur, Mineral Processing Department, VSKU PG Centre, Nandihalli, Sandur, India
Follow on us
A low grade Limestone from ACC mines, Madukkarai, Coimbatore district, Tamil Nadu, India, was subjected to beneficiation by cationic reverse flotation process with the aim of producing cement grade and metallurgical grade concentrates. The low grade limestone analyzed 43% CaO, 76%TC, 18% SiO2, 1.3% MgO, 1.30% Fe2O3, 2.50% Al2O3, 0.33% alkalis and 36.00% LOI. It contained mainly calcite and quartz which were mutually intergrown with fair degree of liberation at 65 mesh size. Reverse cationic flotation was preferred to direct soap flotation, as practiced in beneficiation plant at Madukkarai. Inverse flotation studies were carried out to float siliceous impurities using cationic collectors varying collector type, collector dosage, mesh of grind and pulp density. Cement grade composite concentrate ( non-float and slimes) assaying 9.51% AI, 90% Total carbonates at wt.% yield of 88 by a process comprising of grinding to MOG D80 400 microns, desliming/ screening over 400 mesh, rougher conditioning with 0.4kg/t SOKEM565C for 2minutes at 50%S, rougher flotation for 4 minutes, at pH 8 and 28% S. The float sand fraction assaying 80.30% AI, 18% total carbonates may be used as eco sand. On the contrary, premium metallurgical grade concentrate assaying 54.64% CaO, 0.6% SiO2, 0.7% MgO, 1.4% Fe2O3, 0.7% Al2O3, 41.0% LOI with weight% yield of 55.2, could be produced at 20% solids, MOG D80 400 microns, and pH 8 with 1.0 kg /t of SOKEM 565 C. The evolved nil waste process is stable, selective, and easily adaptable in the existing anionic soap direct flotation plant at ACC Madukkarai cement works, yielding valuable products.
Flotation, Cationic Collectors, Limestone Flotation, Cement and Metallurgical Grades
To cite this article
B. P. Ravi,
S. J. G. Krishna,
M. R. Patil,
P. S. Kumar,
Beneficiation of Low Grade Limestone from Madukkarai, Coimbatore District, Tamil Nadu, India, International Journal of Mineral Processing and Extractive Metallurgy.
Vol. 2, No. 1,
2017, pp. 1-6.
Copyright © 2017 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/
) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
IBM, (2013), Indian Mineral Year Book, Limestone, Chapter 32, pp 32.1-32.6.
Nikkam Suresh, R Venugopal and TC Rao (2002), Analysis of particle size effects in limestone flotation Proc MPT 2002, IISc, Bangalore, pp 332-337.
TV Vijaykumar, DS Rao,S.Subba Rao, G Bhaskar Raju and S Prabhakar (2003) Beneficiation of a low grade limestone by Flotation,MPT-2003 Panjim, pp-194-207.
AT Sutone and Amanullah, (2004), Performance Evaluation of Limestone Beneficiation Plant of M/S. Associated Cement Company Limited at Madukkarai Cement Works, Proc MPT 2004, IMMT Bhubaneshwar pp MPT-21.1 -21.4.
TV Vijayakumar, DS Rao, S Subba Rao, S Prabhakar and G Bhaskar Raju, (2009), Direct and reverse flotation studies on a siliceous limestone, Proc.MPT2009 IMMT Bhubaneshwar, pp MPT 73.1-73.6.
DS Rao, T. V. Vijaya Kumar, S. Prabhakar and G.Bhaskar Raju, (2009): AT Mineral Processing., vol. 50. pp. 36-47.
A.Shandilya and LM Jha (2012), Optimization of froth flotation reagents for limestone beneficiation in the cement industry: XXVI IMPC, New Delhi, pp-12.4913-12.4920.
A. Shandilya (2012), sage of froth flotation reject as sand, XXVI IMPC, New Delhi, pp-675.4922-675.4930.
Rachappa Kadli, Gajula Suresh Ram, M V Rudramuniyappa and B P Ravi (2014), Beneficiation of Limestone from Bagalkot, Karnataka for Metallurgical Industry, IJERT, 3(3), pp 2095-7.
Rachappa Kadli, M V Rudramuniyappa, B P Ravi, B Suresh and Balavantappa (2015), Reduction of Silica from Limestone of Bagalkot, Karnataka, Proc. MPT 2014, Andhra University, Vishakapatnam.