DMR SEKHAR A PROFILE

December 2010

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 67 technical papers of which 25 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). 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 is currently on deputation with M/s JPMC Plc, Jordan. 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.

CURRICULUM VITAE

07 Educational Qualification:

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

Head Beneficiation Plant,

Eshidiya Mines, JPMC,

PO Box-30, Amman, Jordan

06 Contact Mobile number 00962-799888831

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

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

(Dr. DMR Sekhar)

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 & Honors

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)

Significant Achievement Award, Udaipur Chamber of Commerce and Industries. 18th March 1999.

Scroll of honor 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

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

PROFESSIONAL EXPERIENCE

SN 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.

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

RSMML, Operation and Processing of Rock Phosphate ore at 1500 TPD Plant.

(Ben.) Jhamarkotra

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 a) 21.04.2007 Executive Director

M/s Wharton Overseas FZE, Ajman

On Deputation to Jordan Phosphate Mines Co. Ltd to provide management/technical services.

b) 23.04.2010 Director (Projects)

M/s Wharton Overseas FZE, Ajman

On Deputation to Jordan Phosphate Mines Co. Ltd to provide management/technical services.

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, Vl.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.

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 Flotability 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.

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 Over view

Process & Plant Engineering, Vol. XIX, No.5; Annual 2001.

DMR Sekhar

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. Fertilizer In Alkaline Soils: Problems and Prospects

PROM REVIEW-2001, Organized by Rajasthan State Mines & Minerals Ltd, Udaipur; Page No. 94-97

D.M.R. Sekhar et al

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.S. Bhoge

A.D. Dwivedi et al

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 Phosphate Rocks

PROM Review-2005, Udaipur (28.12.2005)

D.M.R. Sekhar, G. Prabhulingaiah, D.K. 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

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

Paper accepted by Indian Chemical Engineers Journal for publication, 2009

K. Srinivas and D.M.R. Sekhar

64 Soap flotation of salt type minerals

Paper accepted for presentation in ICE Seminar, 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

Version 9. Knol. 2010 Oct 4. Available from: http://knol.google.com/k/dmr-sekhar/chromium-uptake-by-fenugreek/3ecxygf1lxcn2/42.

DS Xanthate, ChVR Murthy, SCS Rajan and DMR Sekhar

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

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

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

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

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.

MAJOR 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

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, 1.167 million tons during 2009 and 1.27 million tons during 2010.

April, 2007 to till date

16 It has been proved that Urea acts as a promoter in the soap floatation of phosphate minerals.

2010

Achievements of Dr. D M R Sekhar at 1500 TPD Phosphate Ore Processing Plant- Jhamarkotra (March 1995 to April 2001) and at

Gypsum/Limestone Projects

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 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. As in-charge production of gypsum, 1.4 million tonnes of gypsum was produced in the year 2001-02 (as against 1 million tonnes during 2000-2001) and 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 are the highest production levels of gypsum and limestone ever achieved in Rajasthan State Mines & Minerals Ltd (RSMML) at that point of time. During 2004-05 Gypsum Division under Dr. Sekhar produced and marketed 2.8 million tonnes of gypsum, the ever highest until 19.04.2007.