1
DMR SEKHAR A PROFILE
January, 2016
2
Brief profile of Dr. DMR Sekhar Dr. DMR Sekhar is a graduate in chemical engineering and a post graduate in mineral process
engineering from Andhra University. He was awarded PhD degree by Andhra University for his thesis
on “separation of sulfide minerals from complex ores”. He published 83 technical papers of which 28
are in peer reviewed journals. He is a recipient of “National Mineral Award” for the year 1997 from
the Government of India, “Mineral Beneficiation Award” for the year 2002 from the Indian Institute
of Mineral Engineers and “Mining Engineering Design Award” for the year 2004 from the Institution
of Engineers (India). United Phosphorous Chemcon Distinguished Speaker Award, December, 2011
conferred by Indian Institute of Chemical Engineers.
Dr. Sekhar served M/s Hindustan Zinc Ltd (1979- 83). M/s Rajasthan State Mineral Development Corporation Ltd (1983-1995) and M/s Rajasthan State Mines and Minerals Ltd (1995-2007) at various positions and was Group General Manager in M/s RSMML before joining M/s Wharton Overseas FZE, Ajman, UAE as Executive Director. He was on deputation with M/s JPMC Plc, Jordan and Director, M/s Wharton Overseas FZE, Ajman, UAE till 16/2/2014. He is collaborating with M/s Xanthate Technologies since then and Director, CEEC International Ltd, Australia since November 2014. Dr. Sekhar designed an unconventional grinding circuit for Phosphate Ore Beneficiation Plant at Jhamarkotra, India that involved a roller press operating in tandem with a wet grinding ball mill which proved to be highly energy efficient that reduced power consumption by 15 kWh per ton of ore treated. Dr. Sekhar along with Prof. NC Aery carried out the pioneering experiments on Phosphate Rich Organic Manure [PROM] which proved to be more efficient than Di Ammonium Phosphate the well known chemical phosphatic fertilizer.
Dr. DMR Sekhar receiving National Mineral Award (24/12/1998) from Sri Naveen
Patnaik, the then Minister of Mines, Govt. of India.
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Dr. DMR Sekhar receiving United Phosphorous CDS Award from Er. A. Bhasker Reddy, President,
Indian Institute of Chemical engineers during ChemCon – 2011, Bangalore, 27-29, December, 2011.
Dr. Sekhar receiving Mining Engineering Design Award 2004, on 17th December, 2004, from Er. B.J. Vasoya, President, Institution of Engineers (India), during 19th Indian Engineering Congress, Mumbai.
4
Dr. Sekhar receiving Mineral Beneficiation Award 2002 from Prof. SP Mehrotra, President,
Indian Institute of Mineral Engineering, on 3-1-2002, during annual conference, Bangalore.
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6
CURRICULUM VITAE
07 Educational Qualification:
Examination passed Institution Marks obtained Division
Matriculation Andhra University 67% First Class
P.U.C. Andhra University 60% First Class
B. Tech. (Chemical Engg.) Andhra University 54% Second Class
M.Sc. (Mineral Process Engineering) Andhra University 68% First Class
Ph.D. on "Separation of Sulfide
Minerals from complex Ores" (From
the faculty of Chemical Engineering.
Andhra University
01 Name DMR Sekhar
02 Father’s Name D.T. Moses
03 Date of Birth 01.03.1952
04 Place of Birth Ongole
05 Mailing Address DMR Sekhar
Collaborator, Xanthate
Technologies, Vizag.
Flat 9, Sri Durga
Apartments, China Waltair-
530003, India
06 Contact Mobile number 0091 9573250902
7
08 Training
1) In Plant training in mineral processing at I.R.E. Chavara (Kerala) from
08.05.78 to 10.06.78
2) Field project training in mineral processing at A.M.D. Bangalore from
10.04.78 to 04.05.78
09 Extra
Curricular
Activities
1) Secretary, Student's Union (73-74) A.U. Engineering College, Waltair.
2) Represented Andhra University in Kho-Kho in All India Inter - University
Tournament held at Poona (1974)
10 Awards &
Honours
1) Productivity Award, Udaipur District, for the year 1997. 15th August 1997
2) National Mineral Award for the year 1997, by Government of India, Ministry of
Steel & Mines, 24 Dec 1998.
3)
4)
5)
6)
7)
8)
Significant Achievement Award, Udaipur Chamber of Commerce and
Industries. 18th March 1999.
Scroll of honour conferred by Udaipur local centre of The Institution of
Engineers (India), 15.09.99.
Mineral Beneficiation Award, by the Indian Institute of Mineral Engineers, 3rd
January, 2002,during MPT, Bangalore.
Felicitated by the Institution of Engineers (India), for being an eminent
personality in the field of Mining Industry, during XIV National Convention of
Mining Engineers, on 27.2.2002 at Udaipur.
Mining Engineering Design Award-2004, by Institution of Engineers (India), on
17.12.2004, during Indian Engineering Congress, Mumbai.
United Phosphorus Chemcon Distinguished Speaker Award by the Indian
Institute of Chemical Engineers during Chemcon, 27th -29th ,2011, Bangalore.
8
Duration Designation Employer Nature of job.
01 a) 28.6.1979 to
27.6.1980
Prob. Eng. H.Z.L. Shift Engineer 4000 TPD Lead-Zinc beneficiation plant, Zawar Mines.
b) 28.6.1980 to
15.9.1980
Engineer (OD) H.Z.L. -do-
c) 15.9.1980 to
5.8.1983
Development
Engineer-1
H.Z.L. Feasibility and Process Development Studies on Copper, Lead and Zinc Ores (bench scale & pilot plant at Central R&D Lab.
d) 7.2.1983 to
14.4.1983
Development
Engineer-1
H.Z.L. Shift In charge 600 TPD Rock Phosphate Beneficiation Plant, Matoon Mines.
e) 5.8.1983 to
2.12.1983
Engineer (OD) H.Z.L. Shift In charge 500 TPD Lead-Copper Beneficiation Plant, Sargipalli Mines.
02 a) 26.12.1983 to
18.12.1984
Process Eng. R.S.M.D.C.
LIMITED
In charge Fluorspar Beneficiation Plant, Rajasthan Fluorspar Project, Dungarpur.
b) 18.12.1984 to
15.10.1986
Process Eng. R.S.M.D.C.
LIMITED
In charge, Rajasthan Fluorspar Project, Dungarpur.
Agent of Fluorspar Mines, Dungarpur from 12.7.85 to 15.10.86.
03 a) 15.10.1986 Process Eng. R.S.M.D.C.
LIMITED
In charge 18 TPD Pilot Plant for Graphite Beneficiation, Banswara.
Preparation of Feasibility Reports for Graphite and Fluorspar Plants for commercial operation.
R&D Studies on Copper-Lead and Zinc ore of Deri Mines.
R&D Studies on Bentonite and other industrial minerals.
b) 15.11.1990 Process Eng. R.S.M.D.C.
LIMITED
In charge of Rajasthan Fluorspar Project, Dungarpur.
In charge of Mahi Graphite Project, Banswara.
Agent of Limestone Graphite and Rock Phosphate Mines w.e.f. 4.1.91.
PROFESSIONAL EXPERIENCE
9
04 17.08.1993 Senior Process
Engineer.
R.S.M.D.C.
LIMITED
-do-
Job responsibilities include Production and Marketing of Fluorspar, Limestone, Graphite and Rock Phosphate.
05 05.03.1995 Chief Manager
(Ben.)
RSMML,
Jhamarkotra
Operation and Processing of Rock Phosphate ore at 1500 TPD Plant.
06 17.03.1999 General
Manager
RSMML,
Jhamarkotra
In charge 1500 TPD Rock Phosphate Concentrator.
In charge Phosphate Research & Development Centre.
07 a) 21.04.2001 General
Manager
RSMML,
Bikaner
In charge Lime Stone Sizing Plant, Jaisalmer.
In charge Gypsum Project, Bikaner.
b) 26.3.2002 Group General
Manager
RSMML,
Bikaner
In charge of Production of SMS Grade Limestone, Jaisalmer; and Gypsum Production from Bikaner Group of Mines.
In charge Phosphate Research and Development Center (in house R & D of RSMML, recognized by DSIR, Govt. of India).
c) 19.04.2007 Group General
Manager
RSMML,
Bikaner
In charge of Gypsum Operations.
Chief Coordinator R&D, RSMML.
08 21.04.2007-
16/2/2014
Executive
Director/Direc
tor
M/s
Wharton
Overseas
FZE, Ajman
On Deputation to Jordan Phosphate Mines Co. Ltd to provide management/technical services.
9 Feb, 2014 Collaborator
Xanthate Technologies, Vizag
10 Nov., 2015 Director CEEC International Ltd., Australia.
10
LIST OF TECHNICAL PAPERS PUBLISHED / PRESENTED
SN Title of the Paper Status / Details of Publication Authors.
01 The Role of pH in
Flotation.
Presented "National Symposium on
Mineral Beneficiation", 28-29 April, 1983
at Khetri Nagar, Organized by the
Indian Institute of Metals.
D.M.R. Sekhar & Y.
K. Chauhan
02 Revegetation of Tailing
dams.
Presented "National Conference on Lead
Zinc & Cadmium at work place
Environment & Health Care", organized
by Lead, Zinc Information Centre, Delhi.
D.M.R. Sekhar, N.C.
Aery &.D. Tiagi.
03 Primary Vegetative
Growth on an Old Tailing
Dam, Zawar Mines.
"Minerals and Environment", London,
Vol. 5, Page 128, 1983.
D.M.R. Sekhar &
M.R. Jakhu.
04 Some Studies on Lead-
Copper Separation.
"Indian Chemical Engineer", Vol XXVII,
No.r, 1985.
D.M.R. Sekhar,
A.J.Rao, G.G.
Tarniker & M.R.
Chulet.
05 Processing of Low Grade
Silica based Rock
phosphate Ore.
Fertilizer News, Vol.31, No. 6, 1986. D.M.R. Sekhar, V.S.
Rangarajan, S.V.
Ramanamurthy &
V.K. Jain.
06 Preactivation of Cyanide
Depressed Sphalerite with
Formaldehyde.
Transactions of The Indian Institute of
Metals, Vol.30, No.3, 1986.
D.M.R. Sekhar, G.
Siva Reddy & S.C.S.
Rajan.
07 Process options for a Lead
Zinc ore having
interfering Gangue
Minerals.
Transactions of the Indian Institute of
Metals Vol.40, No.2, 1987.
D.M.R. Sekhar, M.R.
Kunda & B.L.
Agrawal.
08 Studies on Lead-Copper
Separation: Deri Ore.
Indian Chemical Eng. Vol. XXX No.3,
1988.
D.M.R. Sekhar.
11
09 A Note on Graphite Ore
Processing.
Transactions of MGMI (India) Vol.86,
No.1, April, 1989.
D.M.R. Sekhar, M.C.
Sharma & H.K.
Gupta.
10 On the Relative Abilities
of some Metals ions for
activation of Sphalerite.
Transactions of The Indian Institute of
Metals, Vol 41, No.4, 1988.
D.M.R. Sekhar &
Rama Shanker.
11 Gangue Depression
during Galena Flotation.
"The Institution of Engineers"(India)
Journal – MM, Vol.71, March, 1991.
D.M.R. Sekhar,
M.R.Kunda, Y.K.
Chauhan & B.N.
Chatterjee.
12 Surface Modification in
Froth Flotation Process.
In the pre-prints of the workshop on
Development in Flotation and Mineral
Industry, RR Labs Bhuvaneswar, 6-7
April 1989.
D.M.R. Sekhar, Rama
Shanker & C.
Chiranjeevi.
13 Selective Separation with
Formaldehyde of
Sphalerite from Deri Ore,
Rajasthan, India
Transactions of The Institution of Mining
& Metallurgy, Section 'C', May-Aug.1990
- London.
D.M.R. Sekhar, C.
Chiranjeevi.
14 Products of Activation
and the Floatability of
Sphalerite An Alternate
View.
"Mineral Processing & Extractive
Metallurgy Review" Vol.7, 1990, Gordon
and Breach Science Publishers Inc., Inc.,
Great Britain.
D.M.R. Sekhar and
Rama Shanker.
15 Selective Destruction of
Dolomitic Limestone
Gangue. Matrix for up
gradation of stromatolitic
phosphorite.
National Symposium on Mineral
Processing and Beneficiation. Deptt. of
Chemistry, SVUPG Centre,
CUDDAPAH -AP, 24 to 26 Jan. 1991.
P.K. Bhargava, Kireet
Achrya & D.M.R.
Sekhar.
16 A Note on The Bentonite
Clay and its use in Oil-
well Drilling.
Symposium on use of clay in Agriculture
Engineering Industries, Clay Mineral
Society of India, CAZRI, Jodhpur, 26-28
Sept.1991.
D.M.R. Sekhar and
R.K. Mundra.
17 Effect of Formaldehyde
and Nickel Sulphate
Solutions on the
Activation of Cyanide
Depressed Sphalerite.
Minerals Engineering Vol.4, Pergamon
Press 1991, Great Britain.
G. Siva Reddy.
C. Konda Reddy, K.
Ravindranath,
D.M.R. Sekhar and
M.R. Chulet.
12
18 Insitu Inlaying - A New
Technique for
Dimensional Stones.
Indian Stone, Vol.7, No.4, Nov.1994, All
India Granite & Stone Association,
Bangalore.
D.M.R. Sekhar.
19 Soap Flotation of
Dolomite
National Seminar on Indian Mineral
Processing Advances , organized by
IIME , at Puri - 18,19 April-96
K. Srinivas
D.M.R. Sekhar
Y.K. Chauhan
20 Soap Flotation Plant
Practice in India.
Trans.Indian. Inst. Of Metals, Vol. 51,
No. 4, August 1998
D.M.R. Sekhar
Y.K. Chauhan.
21 Pre-Activation of Cyanide
Depressed Sphalerite
Technical Bulletin, I.I.M, Udaipur, Jan -
Mar., 1997.
D.M.R. Sekhar, G.
Siva reddy.
22 Structure of Water
Around Activated
Sphalerite
Technical Bulletin, IIM, Udaipur
July-Sept, Vol. 15 No2, 1997
DMR Sekhar,
C. Chiranjeevi
Ramashanker
23 SPC Techniques as
Applied to Flotation
Process
Indian Chem. Engr. Section B, Vol. 42,
No.4, Oct-Dec (2000)
DMR Sekhar , R.K.
Meena
D.M. Shrinivasan
Dheeraj Kapoor
24 SPC Techniques for
Analyzing Flotation Plant
Data
Indian Chem. Engr. Section A, Vol. 43,
No.1, Jan-March (2001).
DMR Sekhar
DM Srinivasan
Abdul Manan
MK Katewa
25 Processing Dimensional
Stones
Presented in the seminar organized by
Indian Institute of Mineral Engineers,
Bhubaneswar 1995, revised version in
Saket Industrial Digest, Oct 1999.
DMR Sekhar
Rama Shanker
26 Direct Application of
High Grade Rock
Phosphate As Fertilizer -
A prelim. Report.
Presented in the National Seminar on
"Food Security organized by RCA
Alumni Association, Udaipur 29-30 Sept
2000
DMR Sekhar
NC Aery
27 Flotation Kinetics : An Process & Plant Engineering, Vol. XIX, DMR Sekhar
13
Over view No.5; Annual 2001. Rama Shankar
28 Scale Up and Design of
Flotation Circuits
Process & Plant Engineering, Vol. XIX,
No.3; October-December, 2001.
DMR Sekhar
29 Phosphate Ore Processing
Plant, Jhamarkotra
In the souvenir of seminar on "Recent
techniques in mineral processing waste
and environment management" 1st &
2nd Feb 2000, RRL, Bhubaneswar
DMR Sekhar, et al
30 Fused Calcium
Magnesium Phosphate
from Low Grade
Phosphate Ore of
Jhamarkotra
In the souvenir of national seminar on
"Mineral Processing Technology 2000",
4&5 April 2000, Indian Bureau of mines,
Nagpur
DMR Sekhar
AD Dwivedi
31
Phosphate Rock With
FYM As P. Fertilizer – In
Neutral And Weakly
Alkaline Soils
Current Science, Vol. 80, No. 9, 10 May
2001, Bangalore
DMR Sekhar
NC Aery
32 PROM - The Product
And The Technology
Process & Plant Engineering, October-
December, 2001.
DMR Sekhar
33 Phosphate Rich Organic
Manure From Wastes of
Sugar And Fruit Juice
Industries
Indian Food Packer, Vol. 54, No. 6, Nov-
Dec 2000, A Journal of All India Food
Packers Association.
DMR Sekhar
34 Phosphatic Fertilisers : An
Alternate Approach
Indian Chemical Engr., Section B, Vol.
44, No.3,
July-September 2002
DMR Sekhar, NC
Aery, DK Gupta
35 Evaluation of Reagents in
Flotation of Graphite from
Rampura Agucha Ore
Trans. Indian Ins. Met. Vol. 54, Nos. 1-2,
February-April 2001,
Sunita Parashar et al
36 Studies on the Use of
high-grade Rock
Phosphate As a Direct ‘P’
Fertilizer in Neutral And
Weakly Alkaline Soils
PROM REVIEW-2001, Organized by
Rajasthan State Mines & Minerals Ltd,
Udaipur; Page No. 15-25
N.C. Aery et al
37 Direct Application Of
Rock Phosphate As P.
PROM REVIEW-2001, Organized by
Rajasthan State Mines & Minerals Ltd,
D.M.R. Sekhar et al
14
Fertilizer In Alkaline
Soils: Problems and
Prospects
Udaipur; Page No. 94-97
38 Studies On The
Agronomic Effectiveness
Of PROM In Weakly
Alkaline Soils
PROM REVIEW –2002, Organized by
RSMM Ltd., Udaipur and MPUAT,
Udaipur; Page No. 27-34
N.C. Aery et al
39 Industrial Production of
Phosphate Rich Organic
Manure
PROM REVIEW –2002, Organized by
RSMM Ltd., Udaipur and MPUAT,
Udaipur; Page No. 104-111
D.M.R. Sekhar et al
40 On Determination of
Work Index Using
Laboratory Ball Mill
Proceedings of the International Seminar
on Mineral Processing Technology,
MPT-2002, 3-5 January 2002; Vol.1(2002)
227-230; Eds. Subramanian, K.A.
Natarajan, B.S. Rao and T.R.R. Rao
Rama Shanker et al
41 Beneficiation of Low-
Grade Rock Phosphate of
Jhamarkotra, Rajasthan,
India
Proceedings of the International Seminar
on Mineral Processing Technology,
MPT-2002, 3-5 January 2002; Vol.1(2002)
326-331; Eds. Subramanian, K.A.
Natarajan, B.S. Rao and T.R.R. Rao
Rama Shanker et al
42 Further Studies on
Flotation of Low-Grade
Rock Phosphate Ore of
Jhamarkotra With Various
Chemical Reagents
International Seminar on Mineral
Processing Technology, MPT-2003
Proceedings, February 6-8,2003; 97-101;
Eds. K.S. Raju, S.K. Ghosh, A.
Majumdar, A.K. Nandi, A.T. Sutone and
A.S. Bhoge.
Kuldeep Jain et al
43 Process Performance
Improvement of Rock
Phosphate Beneficiation
Plant, Jhamarkotra,
Rajasthan, India
International Seminar on Mineral
Processing Technology, MPT-2003
Proceedings, February 6-8,2003; 102-109;
Eds. K.S. Raju, S.K. Ghosh, A.
Majumdar, A.K. Nandi, A.T. Sutone and
A.S. Bhoge
K. Srinivas et al
44 Strategies for Utilization
of Dolomite Tailing at
RSMML Rock Phosphate
Beneficiation Plant
International Seminar on Mineral
Processing Technology, MPT-2003
Proceedings, February 6-8,2003; 392-397;
Eds. K.S. Raju, S.K. Ghosh, A.
Majumdar, A.K. Nandi, A.T. Sutone and
A.D. Dwivedi et al
15
A.S. Bhoge
45 Effect of Barium ions and
pH on the flotation –
Beneficiation of
phosphate from
Jhamarkotra dolomitic
rock phosphate ores
In proceedings of International
conference on Quantitative Approaches
in Mineral Processing (QAMP-2003) at
Bhubaneswar. Allied Publishers, New
Delhi, July 3-4, 2003
Indresh Rathore,
Kuldeep Jain, Rama
Shanker, Sekhar,
D.M.R and Ranawat,
P.S.
46 Development of Prom
Technology
Regional Conference on Organic
Farming & Sustainable Agriculture,
organized by Department of Agriculture,
Rajasthan and Society for Organic
Agriculture Movement; 24-25 March
2003, Jaipur; Paged 56-61
D.M.R. Sekhar and
M.K. Katewa
47 Production of Phosphate
Rich Organic Manure and
Power Via
Biomethanation Route
Proceedings of the National Seminar on
Standards and Technology For
Rural/Urban Compost; Indian Institute
of Soil Science, Bhopal; 17th January
2004; Pages 40-49
D.M.R. Sekhar
48 Internal morphology of
SMS grade limestone
samples
Trans. Inst. Min Metall. C Vol.115, No.3 ,
127-131 (2006)
P. Sen, Joyee Ghosh,
G. Prabhulingaiah,
D M R Sekhar
49 Direct Use of Rock
Phosphate along with
Lignite on Cowpea
PROM Review-2004, organized by
RSMM Ltd. and MPUAT, Udaipur,
28.12.2004; Page No. 26-30
N.C. Aery, D.K. Rana
and DMR Sekhar
50 Phosphatic Manures National Symposium on “Management
of Organic Wastes for Crop Production”,
C C S Haryana Agricultural University,
Hissar, Jan. 19-20, 2005.
D.M.R. Sekhar and G.
Prabhulingaiah
51 Standardization of PROM Presented during National Seminar on
‘Role of PROM and organic sources of
plant nutrients in sustainable
agriculture’ on 27.12.2005 at Udaipur,
organized by Deptt. of Agronomy,
MPUAT
DMR Sekhar
52 PROM and Solubility of PROM Review-2005, Udaipur D.M.R. Sekhar, G.
Prabhulingaiah, D.K.
16
Phosphate Rocks (28.12.2005) Gupta and M.K.
Katewa
53 Test for SMS Grade
Limestone
Trans. Indian. Inst. Met., Vol.59, No.1,
February 2006.
G. Prabhulingaih,
Joyee Joseph, P. Sen,
DMR Sekhar
54 Reengineering the
Jhamarkotra phosphate
concentrator
In the proceedings (3rd Volume) of-
International Mineral Processing
Congress, Turkey-3-8 September, 2006.
D.M.R. Sekhar and
C.L. Jain
55 Gypsum Sizing Plant at
Rawla
In the Volume of Indian Institute of
Minerals
D.M.R. Sekhar and
G. Prabhulingaiah
56 Developments in the
Phosphate Concentrator,
Jhamarkotra : 1995-2005
In the Volume of Indian Institute of
Minerals
D.M.R. Sekhar and
C.L. Jain
57 Resistance of Limestone
to Size reduction
Indian Chemical Engineer, Vol.49, No.2,
April-June, 2007.
G. Prabhulingaiah,
S.R. Jakhar, M.S.
Shekawat, P.S.
Ranawat and D.M.R.
Sekhar
58 Integration of the Laws of
Thermodynamics, the
properties of DNA
molecules, the primary
instincts and the
mechanism of natural
selection
22nd Indian engineering congress, 14-16
December, Udaipur, 2007
D.M.R. Sekhar
59 Phosphate Mineral as
Fertilizer in Saline soils
In the proceedings of International
Mineral Processing Congress, Beijing
(China),24-28 September,2008
D.M.R. Sekhar,
Yasser Dassin, Lutfi
Momani and Abu
Hamatteh
60 Urea as promoter in the
soap flotation of
phosphate ores
Trans.IIM, Vol.62, Issue 6, December,
2009, pp555-557
D.M.R. Sekhar, K.
Srinivas, G.
Prabhulingaiah and
Yasser Dassin
17
61 Utilization of Eshidiya
Phosphate Beneficiation
plant rejects
Presented in MPT-2009, Bhubaneswar,
India
K. Srinivas, Yasser
Dassin, G.
Prabhulingaiah and
D.M.R. Sekhar
62 Promoters for soap
flotation of Phosphate
minerals
In the proceedings of IMPC-2010,
Brisbane, Australia
D.M.R. Sekhar, K.
Srinivas, G.
Prabhulingaiah,
Yasser Dassin and
Abdullah Alftinah
63 Comparative study of
Jhamarkotra soap
emulsion and tall oil soap
emulsion as flotation
collectors
Indian Chemical Engineer, Vol. 52 No. 3
July – September, 2010.
K. Srinivas and
D.M.R. Sekhar
64 Soap flotation of salt type
minerals
Paper presented during ChemCon of
Indian chemical engineers, 2009 at
Andhra University, Visakhapatnam
K. Kanna Babu,
Ch.V.R. Murthy, K.
Srinivas and D.M.R.
Sekhar
65 Peer review and science CURRENT SCIENCE, VOL. 98, NO.9, 10
MAY 2010
D.M.R. Sekhar
66 Open Review of Science
Publications
Accountability in Research, 17: 1-7, 2010 D.M.R. Sekhar and
N.C. Aery
67 Chromium uptake by
Fenugreek
Presented in the seminar NaRMA – 2,
2010, organized by PROM Society at
Udaipur.
http://precedings.nature.com/documen
ts/6762/version/1
DS Xanthate, ChVR
Murthy, SCS Rajan
and DMR Sekhar
68 Studies on the
Accumulation of
Chromium in Fenugreek
presented during the Seminar
NaRMA-3 organized by PROM
Society, 19-20, December, 2011,
Jodhpur.
http://precedings.nature.com/document
s/6763/version/1
Xanthate D S, Murthy
Ch V R, Rajan S C S &
Sekhar D M R
69 Hydro tropes as
promoters in soap
presented during The 6th Jordanian
International Mining Conference, 1-3,
November, 2011, Amman, Jordan.
Abubakar Khadri,
Vijay Kumar P, Yasser
Dassin,
18
flotation http://precedings.nature.com/document
s/6571/version/1
Prabhulingaiah
Gowda&
Sekhar DMR
70 Gene, Brain and
Behaviour
DNA Decipher Journal, Vol 1, No 3(2011),
http://dnadecipher.com/index.php/ddj/
article/view/20
Sekhar, DMR
71 Genome and Plausible
Genopsych
Journal of Consciousness
Exploration & Research, Vol 2, No
10(2011),
http://jcer.com/index.php/jcj/art
icle/view/193
Sekhar, DMR
72 PROM Khad an efficient
source of P to replace the
costly chemical
Phosphatic Fertilizer
Presented during the seminar NaRMA –
3 organised by PROM Society during 19-
20, December 2011 at Jodhpur, India.
http://precedings.nature.com/document
s/6848/version/1
Sekhar, DMR.,
Katewa, MK. and
Shaktawat, MS
73 genomic consciousness Transcience Transactions, Vol. 1, 2010.,
ISBN: 978-81-86-882-35-9
Sekhar, DMR
74 Tri Sodium Citrate as
Promoter in the Soap
Flotation of Phosphate
minerals.
IMPC 2012, New Delhi P Vijay Kumar,
Abubakar Khadri, G
Prabhulingaiah, and
D M R Sekhar
75 Direct Application of
Phosphate Rock in
Alkaline Soils: New
Technologies
NaRMA IV, Organised by PROM Society,
Bikaner, Dec. 2012.
MK Katewa, DMR
Sekhar and MS
Shaktawat
76 Application of Phosphate
Rock as P Fertilizer in
Alkaline Soils: Review of
New Technologies
BMPC 2013, Bulgaria Sekhar, DMR and
Kumawat RC
19
77 Optimization of Tri
Sodium Citrate doses as
Promoter in Soap
Flotation
BMPC 2013, Bulgaria P. Vijay Kumar,
Yasser Dassin, G.
Prabhulingaiah, DMR
Sekhar
78 Discarded Phosphatic Slimes as Fertilizer in Alkaline Soils
Journal of the Polish Mineral Engineering
Society, July – December, 2014
D.M.R. Sekhar , G. Prabhulingaiah , Yasser Dassin, Mahesh Ganesa
Pillai, Sreedevi
Upadhyayula
79 Phosphate Recovery from
Slime Sized Ore
Proceedings of XIII International Seminar
on Mineral Processing Technology- 2013,
Bhuvaneshwar.
DMR Sekhar, Et Al
80 Future of Phosphatic
Fertilizers
International Journal of Applied Life
Sciences and Engineering, Vol. 1(1) 0-
0,2013
DMR Sekhar
81 Evolution of Species International Journal of Applied Life
Sciences and Engineering, Vol. 1(1) 0-
0,2013
DMR Sekhar
82 Genetic Studies Show the
Native Indians
South India journal of Social Sciences,
ISSN 0972-8945,Vol. XII No 2, Dec 2014
DMR Sekhar
83 Life and Consciousness Journal of Indian Psychology, ISSN 0973
-5431, Vol. 28, No 1&2 Jan & July 2014.
DMR Sekhar
84 The Mind Journal of Indian Psychology, ISSN 0973
-5431, Vol. 29, No 1&2 Jan & July 2015.
DMR Sekhar
85 Behaviour of Living
Systems
Journal of Indian Psychology, ISSN 0973
-5431, Vol. 29, No 1&2 Jan & July 2015.
DMR Sekhar and AK
Purohit
20
LIST OF POPULAR ARTICLES ON TECHNOLOGY / MANAGEMENT
SN Title of the article Magazine/ Journal Authors
01 Technology Management
Today and Tomorrow
Annual Bulletin, The Institution of
Engineers (India) Udaipur Center. 15th
September 1998.
DMR Sekhar
02 SWOT Analysis And Beyond Saket Industrial Digest June 2000 DMR Sekhar
03 Of Change and Transformation
in Business
Annual Bulletin, The Institution of
Engineers (India) Udaipur Chapter, 15th
Sept 1999
DMR Sekhar
04 Super phosphate from
Jhamarkotra concentrate
Khanij Sanskar , Jan -March 1997 DMR Sekhar
05 Some value added products
from Rock Phosphate
Khanij Sanskar , April 2000 DMR Sekhar
RK Meena
Navin Dalal
06 Managing the Nation – Plan in a
Nutshell
Saket Industrial Digest, Sep 2000 DMR Sekhar
07 Self-Employed Co-operative
Society - The Plan of a Model
Saket Industrial Digest, July 2002 DMR Sekhar
08 Industry & Social Development Saket Industrial Digest, August 2004 DMR Sekhar
09 Some Philosophical Aspects of
the Genopsych
Saket Industrial Digest, May 2005 DMR Sekhar
10 The Model of Genopsych Saket Industrial Digest , July 2005 DMR Sekhar
11 Native Intelligence Communicated for publication to Saket
Industrial Digest
DMR Sekhar
12 Geno - Psych: A Model for
Understanding Mind-Body
Relation,
11th Souvenir (vol. 11) on Engineers’ day
September 15, 2006, The Institution of
Engineers (India), Udaipur local chapter
DMR Sekhar
21
Technical Books Published
Title Subject/Publisher Authors
1 PROM Manual: A Practical
Guide to PROM Making
Agriculture, Himanshu
Publications, Udaipur, 2005,
ISBN: 8179060926
Sekhar, DMR and Aery,
NC
2 Genopsych (monograph) Biology, Transcience
Transactions, Vol 2, 2011,
ISBN: 978-81-7233-724-7
Sekhar, DMR
3 Consciousness, Entropy
and Evolution
Biology, Transcience
Transactions, Vol. III, 2012,
ISBN: 978-81-7233-794-0
Sekhar, DMR
General Books Published
Serial
Number
Title Subject/Publisher Authors
1 Temples of Sand Poetry (English), Gyan
Books, New Delhi: ISBN:
978-81-7835-914-4
Sekhar, DMR
2 Saphari Poetry (Telugu), RISE,
Ongole, ISBN:978-81-
920745-1-1
Sekhar, DMR
13 Calotropis, a Pioneer in Bio-
Remediation
11th Souvenir (vol. 11) on Engineers’ day
September 15, 2006, The Institution of
Engineers (India), Udaipur local chapter
DMR Sekhar
22
ON - JOB PROFESSIONAL COURSES
Membership in Professional Bodies
SN Membership Institution
01 Life Fellow The Institution of Engineers (India) , Calcutta F106455 - 6
02 Life Member The Mining, Geological and Metallurgical
Institute of India, Calcutta.
8138-LM, 1999-2000
03 Life Member Indian Institute of Mineral Engineers,
Jamshedpur
LM -324
04 Life Member Indian Institute of Metals, Calcutta. UO1- LMO2 – 22359
SN Title of the course Period Faculty Course organized
by
01 Advanced Induction
Course in Mineral
Dressing.
15th - 20th Nov.
1979
i) Prof. P.Sen ii) Prof. N.K.Purohit iii) Prof. D.D.Mishra
Dept. of Chemical
Engineering,
I.I.T.Kharagpur
02 Work - Shop on Hydro
cyclones
25th - 27th Dec.
1980
i) Prof. T.C.Rao ii) Sri M.Vanaugamudi
Indian School of
Mines, Dhanbad
03 Statistical Process Control 5th - 6th Feb.
1996
i) Sri Srivastava ii) Sri Maheswari
Indian Institute of
Quality
Management,
Jaipur.
04 Computer Awareness
MS - Windows 95 &
MS Office for Windows 95
4th - 18th Mar.
1997
i) Mr. Kapil Jain ii) Mr. Manoj Sharma
CMC Limited,
New Delhi.
23
05 Life Member Indian Society of Soil Science LM/S/152, 2002
06 Life Member PROM Society LM-
07 Life Member Indian Institute of Public Administration L-10306
08 Life Fellow Indian Academy of Social Sciences, Allahabad ISSA/M/271/2009
MAJOR SCIENTIFIC ACHIEVEMENTS - Dr. DMR Sekhar
SN Activity Period
01 Identification of plant species and development of a scheme to revegatate lead
- zinc tailings dam of Zawar Mines.
1979 – 81
(ref. 2 & 3)
02 Development of process flow sheet for Rampura Agucha Ore - as an active
member of CRDL team of M/s HZL.
1981 – 83
(ref. 7 & 11)
03 Introduction and successful testing of a new class of reagents – Preactivators
(eg. formaldehyde) in the sphalerite flotation.
1983–97 (ref.
6,13,17, 21)
04 All time high production and sales of fluorspar (beneficiated and directly
mined) at Rajasthan Fluorspar Project/ (RSMDC Ltd.), Dungarpur.
1985 - 86
05 All time high production and sales of graphite (beneficiated) and lime stone
(directly mined) at Mahi Graphite Project (RSMDC Ltd.), Banswada.
1991 – 95
06 Development of a comprehensive theory that explains structural changes in the
liquid water at sphalerite - water interface, while changing sphalerite surface
from hydrophilic to hydrophobic.
1985 – 97
(ref. 10,14 &
22)
07 Formulation of soap collectors for use in acidic flotation circuits theory and
practice.
1995 – 97
(ref. 20)
08 Introduced the use of alfa olefin sulfonate @ 130 grams per MT of ore treated
along with soap, at 1500 TPD, Jhamarkotra Plant, which resulted in the
reduction of soap consumption from 2.5 Kg / MT of ore treated to 1.2 Kg /MT
of ore treated.
2000-2001
09 Reengineered the flotation circuit at 1500 TPD, Jhamarkotra Plant such that the
capacity of the flotation circuit has doubled without adding any new
equipment. This has resulted into large reduction in the power consumption.
1998-2001
24
10
(a)
Developed a very simple technique for direct application of rock phosphate in
neutral and weakly alkaline soils. The technique involves mixing and
application of Jhamarkotra Phosphate concentrate (130 Kg per hectare of +34 %
P2O5 grade) with farm yard manure ( 2 MT, for soils of 7--7.5 pH and 4 MT for
soils of 7.5 -- 8 pH, per hectare). This combination is as good as DAP applied
alone @ 100 Kg per hectare.
2000……
10
(b)
Developed PROM (Phosphate Rich Organic Manure) which is produced by co-
composting high grade phosphate rock in fine size along with organic
materials such as animal dung, green leaves or industrial wastes such as apple
pomace or press mud from sugar industry. PROM contains 15% to 18% total
P2 O5 at 15% moisture.
2001
11 All time high production and sales of rock phosphate concentrate, Industrial
beneficiation plant (RSMML), Jhamarkotra. Special efforts were made to
reduce reagent and power consumption.
1998 – 99
to
2000 – 2001
12 All time high Production of Gypsum at 14.00 Lac MT; and SMS grade
Limestone at 8.5 Lac MT during 2001-02
2001-02
13 Developed a flow sheet that incorporates a roller press to work in tandem with
the existing wet grinding ball mill. This has improved Jhamarkotra (I B P) plant
throughput from 1500 TPD to 3000 TPD, since December 2003. This has
resulted into reduction in power consumption to the tune of 18 kWh per ton of
ore treated.
1st
December
2003
14 Established a 1000 TPD Gypsum Sizing Plant for production of Agricultural
Grade Gypsum at Rawla, Rajasthan which is the first of its kind.
July, 2003.
15 Stabilized the Plant operations of 15000 TPD Phosphate beneficiation facility at
Eshidiya Mines, Jordan Phosphate Mines Company Limited, Jordan. The
average annual production of concentrate from Eshidiya plant was 0.66 million
tons from 1996 to 2006. The plant achieved 1.156 million tons during 2007,
1.438 million tons during 2008 and 1.167 million tons during 2009
April, 2007
to till date
16 It has been proved that Urea acts as a promoter in the soap floatation of
phosphate minerals.
2010
25
Achievements of Dr. D M R Sekhar at 1500 TPD Phosphate Ore Processing Plant- Jhamarkotra (March 1995 to April 2001)
A 1500 TPD plant to process low grade phosphate ores was set up and commissioned
by M/s RSMML during the year 1991-92. Dr D M R Sekhar joined RSMML in the month of
March 1995 and worked as Chief Manager and General Manager at this plant till April 2001.
The operations and process at this scale were fully stabilised during the year 1995-96. It is
during this period that the quality of soap being used in Jhamarkotra process has been
perfected, particularly for use in acidic circuits. It was found that soaps of mixed fatty acids
having the titre point in the range 22 -–26 o C and with an iodine value between 88 – 93 and
having a total fatty matter between 60 – 65 works efficiently. Higher titre value indicates the
presence of more saturated fatty acids and higher iodine value indicates the degree of un
saturation or the presence (of the fatty acids with) of double bonds. Process engineers at
Jhamarkotra plant proved by carrying out bench scale experiments that saturated fatty acids
(eg. Stearic Acid) are more efficient than unsaturated (e.g. Oleic) fatty acids, as flotation
collectors, particularly in acidic circuits. Soaps of mixed fatty acids with the above
specifications and having a typical composition can be called Jhamarkotra soap. Also alfa
olefin sulfonate (a detergent) is being mixed with soap (@ 130 gm per ton of ore treated)
since 15/4/2000 and the soap consumption has come down to 1.3 kg per MT of ore treated
from 2.5 kg PMT. RSMML is intending to patent this technology.
All out efforts are being made to adopt newer technologies to simplify the operations
and the process to reduce the ultimate cost of production. Monofilament polypropylene
filter cloth of the belt drum filter that costs Rs 6.0 lacs per piece has been replaced by
multifilament filter cloth that costs merely Rs.0.14 lacs, resulting a cost savings of Rs 62 lacs
per annum. Similarly hyper steel grinding media has been replaced by high chrome
grinding media, resulting in a reduction in the grinding media consumption from 0.8 Kg per
ton of ore treated to less than 0.2 Kg per ton of ore treated. To increase the life of
hydrocyclone apex, the material of construction was changed from soft rubber to
polyurethane and the outer shell of the lower portion of the apex was mild steel, which
resulted in the cost reduction as well as increase in the life of the spare. In fact cost reduction
efforts are through a planned scientific strategy.
The flotation circuits of the Jhamarkotra plant were constructed using Denver- Sala
flotation cells (AS-9) of 9 M3 volume which were fitted with an impeller drive motor of 18.5
kW. Plant engineers under the guidance of Dr Sekhar carried out re-engineering of the
flotation cells such that a single motor of 18.5 kW drives two cells of 9 M 3 each. This brought
down Kw/M3 from 2.05 to 1.02. Incidentally it is comparable with the lowest power draw in the world
26
claimed by Outokumpu at 1 kW / M3 for their large flotation cells. At the same time by improving
the airflow into the cells, the capacity of acid flotation circuit has been increased in each line
from 14 MTPH to 32 MTPH. This has resulted into large reduction in the power
consumption. The power consumption during the year 2000-01 was 49.1 kWh per MT of ore
treated as against the norm of 56 kWh per MT of ore treated. Statistical techniques are
successfully applied to analyse flotation process monitoring and for possible improvements
in the process. Research efforts are being made through outside laboratories and plant trials
to see if the bulk flotation circuit can be by passed. Another area of research that is of
commercial importance is the possibility of direct flotation of apatite minerals.
An important area in mineral processing where 30 to 40% of the total energy consumed is in the size reduction (crushing & grinding) operations. It is said that grinding operation is very inefficient in that less than 10% of the total input energy is utilised. Thanks to the research efforts made by engineers world over in these areas. Today energy efficient crushing grinding equipments are available of which roller press / pressure roll technology is most efficient. Scrutinising this technology for use in the Jhamarkotra process and integration of the same with the existing flow sheet is in itself a task. Dr Sekhar could develop a flow sheet that retrofits roller press into the existing grinding circuit. The proposed scheme of things were duly examined and accepted by renowned engineering consultants. The project costing around 38 crores of rupees is partly assisted by Technology Development Board, Dept. of Science & Technology, Govt. of India, by way of a soft loan of Rs 490 lacs (approx.). The project has become operational since 27/03/2003 that has resulted into reduction in power consumption by more than 18 KWh per tone of ore treated and the plant throughput increased from 1500 TPD to 3000 TPD.
As in-charge of Production, Dr. Sekhar achieved +100% targeted production at 1500
TPD Phosphate Ore Processing Plant at Jhamarkotra during the years 1998-1999, 1999-2000 and 2000-2001 and thereby setting all time records.
Achievements of Dr. D M R Sekhar at Gypsum and SMS Grade Lime
Stone Projects. As in-charge gypsum project, Bikaner, he geared up the system to produce 1.4
million tonnes of gypsum in the year 2001-02 (as against 1 million tonnes during 2000-2001) These are the highest production levels of gypsum project of M/s RSMML. During 2004-05, after the merger of erstwhile M/s RSMDC Ltd, Gypsum Division under Dr. Sekhar produced and marketed 2.8 million tonnes of gypsum, the ever highest until 19.04.2007.
As in charge of SMS Grade 0.85 million tonnes of SMS grade limestone was
produced in the year 2001-2002 (as against 0.7 million tonnes during 2000-2001). These efforts turned the loss making lime stone crushing plant of RSMML at Sanu Mines, Jaisalmer into profits for the first time since the commissioning of the plant.
27
Achievements of Dr. D M R Sekhar at Phosphate Beneficiation Plant,
Jordan.
Dr. Sekhar took up the responsibility of heading the 12000 TPD phosphate ore beneficiation plant at
Eshidiya mines of M/s JPMC Plc, Jordan in the year 2007. The plant was operational since 1996 and
the average annual production of concentrate was six lac metric tons. The annual average
production of concentrate was improved to twelve lac metric tons in the period 2007 to 2011. M/s
JPMC Plc conferred a scroll of honor in appreciation of the efforts of Dr. Sekhar in improving the
production of beneficiation plant at Eshidiya mines .
Profile of Dr D.M.R. Sekhar
Dr Sekhar was conferred National Mineral Award for the year 1997, by
Government of India and Mineral Beneficiation Award (2002) by the Indian Institute of Mineral Engineers. The Institution of Engineer (India) honoured Dr Sekhar by conferring Mining Engineering Design Award, during Indian Engineering Congress on 17.12.2004.
Dr Sekhar joined M/s Hindustan Zinc Ltd (H Z L) in the year 1979, after
obtaining a degree in chemical engineering and a post graduate degree in mineral process engineering from Andhra University, Visakhapatnam.
Dr Sekhar served M/s HZL at their 4000 TPD lead-zinc processing plant as probationer engineer and engineer (O.D.) at Zawar Mines and as development engineer at their Central Research & Development Centre, Udaipur. After a brief tenure at Sargipalli copper-lead plant of M/s HZL, Dr Sekhar joined M/s Rajasthan State Mineral Development Corporation (RSMDC) as in charge of Fluorspar Processing Plant at Dungarpur and Graphite Processing Plant at Banswara. He eventually headed both Fluorspar and Graphite projects. During 1995 Dr Sekhar joined M/s Rajasthan State Mines & Minerals Limited (RSMML) as in charge of 1500 TPD low grade Phosphate Ore Processing Plant located at Jhamarkotra, Udaipur. Dr Sekhar has completely reengineered the 1500 TPD plant improving production and reducing operation costs. He took lead in designing the grinding circuit to enhance the plant capacity to 3000 TPD by incorporating high pressure grinding rolls (roller press) in the grinding circuit, which is in operation now. Roller press is known to be the most energy efficient grinding machine in the cement plants. Jhamarkotra plant will be the first mineral processing plant in the world that uses roller press successfully. The incorporation of roller press reduced power consumption by 15 to 18 kWh per ton of ore treated, resulting into a savings of 100 million
28
rupees every year on power alone.After promotion to the position of General Manager, Dr Sekhar was made head of Gypsum and SMS Grade Limestone operations of M/s RSMML at Bikaner and Jaisalmer during 2001. Dr Sekhar could improve the viability of gypsum operations at Bikaner by increasing the production level of gypsum from 1
million tons to 3 million tons per annum. SMS grade limestone operations at Jaisalmer were made profitable from 2002-03 (by increasing the capacity of limestone sizing plant without adding new equipment), which otherwise was a loss making project since inception, i.e. 1993-94. Dr Sekhar designed a 1000 TPD gypsum sizing plant to produce agriculture grade gypsum, which is in operation since July 2003.
While being a shop floor production engineer since 1979, Dr Sekhar has been
pursuing research activities both on applied and theoretical aspects simultaneously. Dr Sekhar has produced 47 technical research papers on various topics that include applied botany and environment, flotation studies, surface chemistry, statistics applied to quality engineering, flotation kinetics, design of flotation and grinding circuits. He was conferred Ph.D. degree during 1996 by Andhra University. His recent area of interest being Phosphate Rich Organic Manure(PROM) which goes across product and plant design and agronomic studies on PROM. PROM can revolutionize the use of phosphatic fertilisers as it is proved more efficient than di ammonium phosphate (DAP) and is cheaper than d a p.
29
Annexures
30
31
32
33
34
35
36
37
38
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