DOLOMITE

Indian Minerals Yearbook 2013 (Part- III : Mineral Reviews) 52nd Edition DOLOMITE (ADVANCE RELEASE)

GOVERNMENT OF INDIA MINISTRY OF MINES INDIAN BUREAU OF MINES Indira Bhavan, Civil Lines, NAGPUR – 440 001 PHONE/FAX NO. (0712) 256547 1 PBX : (0712) 2562649, 2560544, 2560648

E-MAIL : [email protected] Website: www.ibm.gov.in

January, 2015

16-1

DOLOMITE

16 Dolomite

D

olomite (CaCO3.MgCO3) theoretically contains CaCO3 54.35% and MgCO3 45.65% or CaO 30.4%, MgO 21.9% and CO2 47.7%. However, in nature, dolomite is not available in this exact proportion. Hence, in commercial parlance, the rock containing 40-45% MgCO 3 is usually called dolomite. It is grouped under flux and construction minerals and is important for iron & steel and ferro-alloys industries.

RESOURCES Dolomite occurrences are widespread in the country. As per UNFC system, as on 1.4.2010 total resources of dolomite are placed at 7,730 million tonnes, out of which 738 million tonnes are placed under reserves category and the balance 6,992 million tonnes under remaining resources category. Gradewise, BF/ sintering grade accounts for 26% resources followed by SMS (17%), refractory (9%), BF & SMS mixed (4%) and glass (3%). Others, unclassified, not-known and BF, SMS & refractory mixed grades together account for the remaining 41% resources. Major share of about 91% resources was distributed in eight states: namely, Madhya Pradesh (29%), Andhra Pradesh (15%), Chhattisgarh (11%) Odisha and Karnataka (9% each), Gujarat (7%), Rajasthan (6%) and Maharashtra (5%). The remaining 9% resources are distributed in Arunachal Pradesh, Jharkhand, Haryana, Sikkim, Tamil Nadu, Uttarakhand, Uttar Pradesh and West Bengal. Gradewise and Statewise reserves/resources of dolomite are given in Table-1.

There were 179 reporting mines in 2012-13 as against 194 in the previous year. Besides, production of dolomite was reported by 42 associated mines in 2012-13 as against 62 in previous year. About 60% of total production was contributed by 15 principal producers. About 21% production of dolomite was also reported as an associated mineral with barytes, clay(others), iron ore, limestone, shale and steatite. Six mines producing more than 2 lakh tonnes annually accounted for 40% of the total production in 2012-13. The share of public sector in 2012-13 was 29% as against 35% in the previous year. Chhattisgarh, the leading producing state of dolomite accounted for 28% of total production in 2012-13, followed by Andhra Pradesh (23%), Odisha,(13%), Karnataka and Madhya Pradesh (9% each). The remaining 18% was jointly shared by Gujarat, Jharkhand, Maharashtra and Rajasthan. (Tables- 3 to 6). Mine-head stocks of dolomite at the end of the year 2012-13 was 2,210 thousand tonnes as against 2,290 thousand tonnes at the beginning of the year (Table-7). The average daily employment of labour in 2012-13 was 3,419 as against 3,426 in the previous year. The prices of dolomite are furnished in General Review on Prices.

EXPLORATION & DEVELOPMENT In 2012-13, exploration activities were undertaken by State Directorate of Geology & Mining Chhattisgarh state in Pacheri-Bhalwahi area in Janjgir Champa district and by GSI in Sirmur and Solan distirct of Himachal Pradesh. Details of exploration activities for dolomite are furnished in Table- 2.

PRODUCTION AND STOCKS The production of dolomite in 2012-13 at 6,713 thousand tonnes, registered an increase of 12% as compared to previous year. 16-2

Table – 1 : Reserves/Resources of Dolomite as on 1.4.2010 (By Grades/States) (In '000 tonnes) Reserves

Grade / State

Proved STD111

Probable STD121

All India : Total

Remaining resources Total (A)

Feasibility STD211

STD122

Pre-feasibility STD221

Measured STD331

Indicated STD332

Inferred STD333

Reconnaissance STD334

Total (B)

Total resources (A+B)

STD222

157442

149176

738185

149971

227173

316967

268726

687617

5189186

152732

6992372

7730557

83881 7846 22526 6856 574 3320 9215 12204 9970 745 307

25479 15066 61720 1683 2267 7043 10662 4692 13371 4507 2685

316641 67562 98707 49719 55478 28210 19877 23751 56778 11412 10051

45429 23166 692 1938 31536 7352 6069 30971 2819

43062 6920 5345 39432 18469 67633 1797 21187 2289 18471 2570

113656 21150 13778 6729 1086 45021 1258 40019 18228 34523 21519

164974 17629 7077 30718 17340 2093 20651 8162 82

408117 47059 6253 4000 33998 1297 46548 58389 81956

864387 863949 142997 184201 204851 524101 5387 129269 81251 614525 1574268

32000 341 288 969 23354 95780

1671625 980214 176430 267987 275744 668291 8442 201217 198390 765041 1778994

1988266 1047776 275137 317706 331222 696501 28319 224968 255168 776453 1789045

By States Andhra Pradesh Arunachal Pradesh Chhattisgarh Gujarat Haryana Jharkhand Karnataka Madhya Pradesh Maharashtra Odisha Rajasthan Sikkim Tamil Nadu Uttar Pradesh Uttarakhand West Bengal

2082 12984 1962 31399 28553 11987 44549 9601 1798 12528

10708 6225 9803 10889 27244 13325 2710 20250 22 48000

68297 60837 31895 22700 128365 82434 48053 167112 64160 3805 60528

50324 19289 9556 5371 18585 17893 5612 19558 3559 224 -

2851 50384 26745 5149 350 7826 85680 1028 27887 5598 12622 1052 -

29135 24355 77285 3722 15391 67042 3569 76634 19484 349 -

554 150795 20263 8519 17250 7000 40387 16502 2010 3500 1946 -

132589 204 24837 63780 54 17578 291229 18050 39474 25480 135 981 73226

896855 77633 514235 295948 15247 18330 465852 1601188 337511 268930 324604 2756 66230 199592 104275

1848 1950 115087 33063 784 -

1114156 77837 785845 493577 29489 18734 533751 2195369 372770 505933 396011 2756 2145 82352 204144 177501

1182453 77837 846682 525472 29489 41434 662116 2277803 420823 673045 460171 2756 2145 82352 207949 238029

Figures rounded off.

55507 41628 20130 22700 86077 26637 22741 119853 34309 1985 -

DOLOMITE

16-3

431567

By Grades B.F./Sintering 207281 S.M.S.(O.H.) 44650 S.M.S.(L.D.) 14461 S.M.S.(O.H.& L.D mixed) 41180 B.F. & S.M.S. mixed 52637 Refractory 17847 B.F., S.M.S.& Refractory Glass 6855 Others 33437 Unclassified 6160 Not-known 7059

DOLOMITE

Table – 2 : Details of Exploration Activities for Dolomite, 2012-13 Agency State/

Location/

District

Mapping

Area/ Block

DMG Chhattisgarh Janjgir -Champa

N/v Pacheri Bhalwahi

Drilling

Sampling

Remarks

(No.) Scale

1:50,000 1:4000

Area

No. of

(sq km)

boreholes

100 2.20

27

Reserves/Resources estimated

Meterage

819.70

670

Objective of exploration was to search locations of limestone. Area is occupied by dolomite of Chandi formation of Hirri sub basin of Chhattisgarh supergroup. The dolomite forms in layers with pink stromatolitic limestone with shaly intercalation. Dolomite is grey & sub horizontally bedded. Deposit of dolomite were demarcated around village PacheriBhalwahi. About 300 lakh tonnes of dolomitic resources were estimated.

GSI Himachal

Sirmaur &

Pradesh

Solan

1:25,000

126

-

-

175

Reconnaissance stage investigation (G-4) was carried out for delineation and assessment of limestone dolomite band. Large scale mapping was carried out at lower, middle and upper members of Kauriyala formations of Saindhar Syncline, Nigalidhar and Korgai Synclines. Based on BIS (10346:2004) specification two zone of grade-II limestone have been delineated. The invesigation has been completed.

Table – 3 : Principal Producers of Dolomite, 2012 –13 Name & address of producer

Location of mine State

District

Steel Authority of India Ltd, Ispat Bhavan, P. B. No. 3049, Lodhi Road, New Delhi – 110 003.

Chhattisgarh Jharkhand

Bilaspur Garhwa

*Bisra Stone Lime Co. Ltd, A.G.,104, Sourav Abason, Sector-II, Salt Lake City, Kolkata-700 091.

Odisha

Sundergarh

Rastriya Ispat Nigam Ltd, Room No. 381, Main Admn.Building, C Block, II floor, North Wing, Visakhapatnam – 530 031, Andhra Pradesh.

Andhra Pradesh

Khammam

(Contd.)

16-4

DOLOMITE (Table -3 Concld.) Name & address of producer

Location of mine State

District

Tata Steel Ltd, Bombay House, 24, Homy Modi Street, Mumbai – 400 001.

Odisha

Sundergarh

*South West Mining Ltd, Talur Cross, Vidya Nagar (Post), Torangallu, Sandur - 583 275, Karnataka.

Andhra Pradesh

Khammam

Manish Singh Banafer, D/22, Vidya Nagar, Near Shiv Mandir, Distt -Bilaspur, Chhattisgarh- 495 001.

Chhattisgarh

JanjgirChampa

Mysore Minerals Ltd, 39-M.G. Road, Bengaluru – 560 001, Karnataka.

Karnataka

Bagalkot

Commercial Stone Supply Co., Station Road, Chhota Udepur- 391 165 Vadodara, Gujarat

Gujarat

Vadodara

Eshan Mineral Pvt. Ltd., M-31, MIDC Area, Bhusaval Road, Jalgaon-425 003, Maharashtra.

Maharashtra

Yavatmal

#Aravali Polyart Pvt. Ltd, A-251 (B-1), Road No.1, M.I.A, Mad Distt. Udaipur-313 003, Rajasthan.

Rajasthan

Udaipur

N. S. Saigal, Associated Mining Co., H2/133, Nanak House, Narmada Nagar, Bilaspur-495 001, Chhattisgarh.

Chhattisgarh

Bilaspur

Dolomite Mining Corpn, Shakti Road, Baradwar, Sakti- 495 687, Chhattisgarh.

Chhattisgarh

JanjgirChampa

B.V. R. Minerals, 202, C. L. Tower, Opposite District Court, Kaviraj Nagar, Distt:- Khammam, Andhra Pradesh.

Andhra Pradesh

Khammam

A. N. Patnaik, Block H/2, Civil Township, Raurkela-769004, Sundargarh, Odisha.

Odisha

Sundergarh

Hira Power & Steel Ltd., Urla Industrial Complex, Raipur – 492 003, Chhattisgarh.

Chhattisgarh

Raipur

* Associated mine with limestone.

# Associated with steatite.

16-5

DOLOMITE

Table – 4 : Production of Dolomite, 2011-12 & 2012-13(P) (By Sector/State/District) (Qty. in tonnes; value in ` ’000) 2011-12

2012-13 (p)

State/District No. of mines

Quantity

Value

No. of mines

Quantity

194(62) 6(1) 188(61)

5968554 2110925 3857629

1737037 891076 845961

179(42) 6(1) 173(41)

6712840 1942691 4770149

2131604 944339 1187265

Andhra Pradesh Anantapur Cuddapah Khammam Kurnool Warangal

39(18) 13 (8) 3 2 20(10) 1*

1299126 57297 1750 679515 560564 -

431236 7963 222 338012 85039 -

35(15) 12 (7) 4 3 15(8) 1*

1549395 44930 36214 652811 815440 -

445927 5685 7797 332311 100134 -

Chhattisgarh Bilaspur Durg Janjgir-Champa Raigarh Raipur

38 17 9 8 3 1

1624834 1067192 65827 404101 87566 148

363761 261334 15425 67657 19323 22

39 17 5 10 5 2

1872796 1072391 36170 565056 186118 13061

507384 315748 6997 121670 60361 2608

20(1) (1) 20

334600 1160 333440

6 11 4 9 348 60801

19(1) (1) 19

391206 1050 390156

73784 315 73469

1(1) 1 1(1)

206938 204626 2312

185204 184163 1041

1 1 -

299723 299723 -

269751 269751 -

17(18) 14(14) 2(1) 1 (3)

560189 503202 46672 355 9960

97368 88070 6884 96 2318

17(14) 14(12) 2 (1) 1 (1)

624449 578048 44603 1298 500

166695 159384 6886 350 75

68(4) 5 3 4(1) 16 7(3) 1 24 1 2 5

460494 8701 138413 19770 59091 25649 5931 197446 1304 2508 1681

11 0 0 9 4 1135 37193 2272 9435 3095 1631 54554 202 279 298

60(1) 2 4 3 8 5(1) 1 31 1 2 3

585096 3388 210441 21601 47801 34126 19909 244569 633 1641 987

104215 524 33488 3098 8170 10262 4518 43709 98 187 161

Maharashtra Chandrapur Nagpur Ya v a t m a l

6(2) 1 4 1(2)

127857 89736 16581 21540

33125 25664 4116 3345

4(1) 1 2 1 (1)

274368 75474 1563 197331

67350 20742 506 46102

Odisha Sundergarh

4(5) 4(5)

111 4 7 2 4 1114724

414535 414535

3(4) 3(4)

888322 888322

448547 448547

Rajasthan Rajsamand Sikar Udaipur

1(12) (5) (1) 1(6)

239639 129256 37 110346

40550 21315 4 19231

1(6) (4) 1(2)

227485 99290 128195

47951 19983 27968

(1) (1)

153 153

15 15

-

-

-

India Public sector Private sector

Gujarat Bhavnagar Vadodara Jharkhand Garhwah Singhbhum(West) Karnataka Bagalkot Belgaum Mysore Tumkur Madhya Pradesh Balaghat Chhindwara Jabalpur Jhabua Katni K h a rgaon(W.Nimar) Mandla Narsimhapur Sagar Seoni

Uttarakhand Pithoragarh

Value

*Figures in parentheses indicate number of associated mines with baryte, clay (others), iron ore, limestone, shale and steatite.

16-6

DOLOMITE

Table – 5 : Production of Dolomite, 2010-11 to 2012-13 (Qty in tonnes; value in `'000) 2010-11

2011-12

2012-13 (P)

State Quantity

Value

Quantity

Value

Quantity

Value

5839704

1870044

5968554

1737037

6712840

2131605

Andhra Pradesh

1216373

363958

1299126

431236

1549395

445927

Chhattisgarh

1592838

363551

1624834

363761

1872796

507384

Gujarat

244212

45935

334600

61149

391206

73784

Jharkhand

429866

386879

206938

185204

299723

269751

Karnataka

442941

71522

560189

97368

624449

166695

Madhya Pradesh

279859

41788

460494

110094

585096

104215

64865

13867

127857

33125

274368

67350

1358156

551985

1114724

414535

888322

448547

210498

30553

239639

40550

227485

47951

96

6

153

15

-

-

India

Maharashtra Odisha Rajasthan Uttarakhand

Table – 6 : Production of Dolomite, 2011-12 & 2012-13 (P) (By Frequency Groups) (Qty. in tonnes)

Production

Number of

Production for

Percentage in total

Cumulative

mines

the group

production

percentage

group 2011-12

2012-13

2011-12

2012-13

2011-12

2012-13

2011-12

2012-13

194(62)

179(42)

5968554

6712840

100.00

100.00

–

–

Up to 1000

55(23)

35(15)

27783

14867

0.47

0.22

0.47

0.22

1001-5000

54(23)

33(8)

214925

102662

3.60

1.53

4.07

1.75

5001-10000

20 (6)

26(5)

182745

228267

3.06

3.40

7.13

5.15

10001-50000

48(6)

63(7)

1314179

1492071

22.02

22.22

29.15

22.37

50001-200000

13(2)

18(5)

1439880

2201479

24.12

32.80

53.27

60.17

Above-200000

4 (2)

4 (2)

2789042

2673494

46.73

39.83

100.00

100.00

All Groups

Figures in parentheses indicate number of associated mines with barytes, clay (others), iron ore, limestone, shale and steatite.

16-7

DOLOMITE

Table – 7 : Mine-head Stocks of Dolomite, 2012-13 (P) (In tonnes) State

At the beginning of the year

India

2289946

2210120

Andhra Pradesh

580227

343310

Chhattisgarh

203867

296584

12652

13766

Jharkhand

3889

28971

Karnataka

218196

229341

Madhya Pradesh

244965

234532

Maharashtra

183629

248469

Odisha

630083

677376

Rajasthan

212438

137771

Gujarat

At the end of the year

plant at Bhadravati receives its supplies from Nerelekere mine in Bagalkot, Karnataka.

MINING AND MARKETING Dolomite mines are generally worked by opencast method of mining. Manual working is in vogue in most of the mines. However, a few mines are semi-mechanised. Steel plants draw major supplies of dolomite for use as a flux and also as a refractory material. The requirement of low silica dolomite is increasing in steel plants at Bhilai, Rourkela, Visakhapatnam and Jamshedpur. However, the supply of such materials from indigenous sources is posing a problem. Therefore, Bokaro, Rourkela, Durgapur and Jamshedpur steel plants are drawing supplies of low silica dolomite from Bhutan for use in tar-bonded refractory bricks required for lining of LD furnaces and also for fluxing purposes. B h i l a i , B o k a r o , R o u r k e l a , J a m s h e d p u r, Visakhapatnam and Bhadravati steel plants have captive mines. Besides, these plants draw supplies from private parties. Dolomite produced from Tulsidamar mine in Garhwa district, Jharkhand, is used mainly by Bokaro Steel Plant. Dolomite produced in Tumkur district of Karnataka is supplied to the ferro-manganese plants at Dandeli, Uttar Kannada district. The VISP’s steel

Dolomite of Baradwar and Hirri areas in Chhattisgarh is supplied to the steel plants at Bhilai, Bokaro and Rourkela besides foundry and glass manufacturing units. Birmitrapur, Panposh and Gomardih areas of Sundergarh district, Odisha, supplied dolomite to iron and steel plants at Durgapur, Rourkela, Burnpur and Jamshedpur. Dolomite from this region is also used by the ferromanganese plants at Joda and Rayagada in Odisha. Low-silica dolomite from Jayanti area in Jalpaiguri district of West Bengal is supplied mainly to steel plants at Durgapur and Jamshedpur. In Odisha and Rajasthan, dolomite is supplied to the foundry and grinding units. The production from Vadodara district, Gujarat, is used for making chips and tiles. In Gujarat and Maharashtra, dolomite is used for making potteries and in ferroalloys industry. Dolomite produced in Jhabua district, Madhya Pradesh, is utilised by fertilizer, tile-making and grinding units. Dolomite of Jabalpur and Mandla districts is supplied to chips manufacturing units at Katni and Bhilai, respectively.

16-8

DOLOMITE

USES Dolomite after calcination is used for refractory purposes (as a substitute of magnesite refractories) in linings of furnaces like basic openhearth steel furnaces and basic Bessemer converters. High purity dead-burnt dolomite bricks are required for lining LD furnaces, while mini-steel plants generally require dolomite for fettling and refractory purposes. Like limestone, dolomite is used as a flux in iron & steel, ferro-alloys and glass works. Few steel plants have dispensed with the use of dolomite in blast furnaces and its use in the preparation of self-fluxing sinters is found adequate for blast-furnace charge. It is useful in the recovery of magnesia and also in the manufacture of magnesium metal; for the manufacture of basic magnesium carbonate (termed ‘technical carbonate’), ‘block magnesia’ or ‘magnesia alba’ used in pipe and boiler coverings as heat insulation, in pharmaceutical, rubber, chemical industries, paper, leather, glass, potteries and high-magnesium limes. In agriculture, it is used as a soil conditioner to correct acidity. It finds use as a filler in fertilizers, paints & varnishes, and for supression of dust in coal mines. It is also used as a building stone and in the making of flooring tiles as chips & powder.

specification of dolomite for refractory industry are prescribed in IS : 14296 - 1995 (Reaffirmed 2010).IS: 15366 - 2003 (Reaffirmed 2009) lays down the specifications of dolomite for paint industry.

CONSUMPTION Dolomite is consumed by iron & steel, ferroalloys, fertilizer, glass, alloy steel and other industries. The total consumption of dolomite in 2012-13 was 6. 80 million tonnes. It increased by 4% from that in the year 2011-12, mainly in sponge iron industry. Iron & steel industry was the major consumer of dolomite in 2012-13 accounting 80%, followed by sponge iron (8%) and cement & ferro-alloys (2% each). The remaining quantity was utilised by other industries, such as alloy steel, glass, fertilizer, paint, refractory, etc. (Table - 9). Table - 9: Consumption of Dolomite 2010-11 to 2012-13 (By Industries) (In tonnes) Industry

Generally, insolubles like SiO2, Fe2O3 and Al2O3 are considered deleterious constituents of dolomite for any industrial use. It is essential that these insolubles should be as low as possible. High purity dolomite with less than one percent insolubles is preferred for making refractory bricks which are used in the lining of LD furnaces. Similarly, high-grade dolomite containing low iron (less than 0.15%) is required in glass industry. The (IS: 997-1973; First Revision; Reaffirmed 2008) specifications of dolomite used in glass industry. The general specifications of dolomite consumed in different steel plants are given in Table-8. Specifications for flux grade dolomite for use in iron & steel industry have been revised and are prescribed in IS : 10346 - 2004 (second revision, Reaffirmed 2009), while

16-9

2011-12(R)

2012-13(P)

All Industries

7290900

6554500

6804700

Alloy steel

53800(6)

53800(6)

53800(6)

Cement

110500(5)

127900(5)

124200(5)

Ceramic

20200(6)

20200(6)

20200(6)

400(1)

3300(1)

3500(1)

138800(29)

134500(30)

130700(30)

Fertilizer

11900(4)

10500(4)

8900(4)

Foundry

1900(5)

1900(5)

1900(5)

84400(31)

109900(32)

89200(32)

Cosmetic

SPECIFICATIONS

2010-11

Ferro-alloys

Glass

Iron & steel 1/ 5291900(13) 5312900(41) 5411500(42) Paint

29500(12)

29800(12)

29300(12)

Refractory

213400(3)

213400(3)

375300(4)

1333500(55)

535700(62)

555500(63)

Others 700(6) (Chemical, electrical, electrode and rubber)

700(8)

700(9)

Sponge iron

Figures rounded off. Figures in parentheses denote the number of units in organised sector reporting consumption. *Includes actual reported consumption and/or estimates made wherever required. 1/ The figures for iron & steel and pelletisation (iron & steel) added.

DOLOMITE

Table – 8 : General Specifications of Dolomite Consumed in Different Steel Plants (In Percent) Plant

Constituent

SP/BF

SMS

Refractory

Bhilai Steel Plant

MgO CaO SiO2 Size

19 (min) 29 (min) 4 (max) 10-60 mm

19 (min) 29 (min) 3.5 (max) 10-30 mm

19 (min) 29 (min) 3.5 (max) 30-60 mm

Bokaro Steel Plant

MgO CaO SiO2 Size

16.5-22.0 23.2-34.8 1.0-20.0 25-75 mm

– – – 30-50 mm

– – – 5-25 mm

Rourkela Steel Plant

MgO SiO2 Al 2 O 3 Fe 2 O 3 AI Size

19 (min) – – – 8 (max) up to 6 mm

20 (min) 2.5 (max) 1.5 (max) 1.0 (max) – 40 to 80 mm

21 (min) 1.5 (max) 0.75 (max) 1.0 (max) – –

Durgapur Steel Plant

MgO CaO SiO2 Al 2 O 3 Fe 2 O 3 AI LOI Size

19.5 (min) – 6 (max) – – 10 (max) – 15-50 mm

20 (min) 30-35 1.5 (max) 0.8 (max) 1.0 (max) – 44.0 30-60 mm

– – – – – – – –

IISCO Steel Plant

MgO SiO2 Size

19.5 (min) – 25-75 mm

20.0 (min) 1.5 (max) 3 - 20 mm

– – –

Tata Steel Ltd

MgO SiO2 AI Size

20 (min) – 6 (max) 20-75 mm

20 (min) 3.45 6 (max) 25-50 mm

20 (min) 1.7 (max) 1.5 (max) 5-25 mm

Visvesvaraya Iron & Steel Plant

MgO CaO SiO2 Size

– – – –

21-22 30-31 1-1.70 10-50 mm

– – – –

Visakhapatnam Steel Plant

MgO CaO SiO2 LOI Size

18.0 (min) 28.0 (min) 4.0 (max) 44.95 6-80 mm

21.0 (min) 30.0 (min) 1.0 (max) 46.00 25-50 mm & 5-25 mm

– – – – –

JSW Steel Ltd

CaO + MgO MgO

– –

>45 >19

– –

IDCOL, Kalinga Iron Works

MgO AI Size

19.50 (min) 8.00 (max) 25-75 mm

– – –

– – –

Kirloskar Ferrous Industries Ltd

MgO CaO SiO2 Al 2 O 3 P Size

19 (min) 28 (min) 3 (max) 1 (max) 0.05 (max) 10-40 mm

– – – – – –

– – – – – –

Visa Steel Ltd

CaO Size

28% (min) 4-8 mm and 10-50 mm

– – –

– – –

KIOCL Ltd

MgO CaO SiO2 LOI Size

19.0 (min) 29.0 (min) 3.5 (max) 43.0 (min) 10-40 mm

– – – –

– – – –

Neelachal Ispat Nigam Ltd

MgO Size

19.5 (min) Up to 60 mm

– –

– –

Note: SP: Sinter Plant;

BF: Blast Furnace;

SMS: Steel Melting Shop;

16-10

AI: Acid I nsolubles

DOLOMITE

FOREIGN TRADE

Imports Imports of dolomite increased considerably

Exports Exports of dolomite decreased drastically to 28,948 tonnes in 2012-13 from 40,254 tonnes in 2011-12. Exports were mainly to Nepal (36%), Bangladesh (33%) and Malaysia (18%) in 2012-13 (Table - 10).

(61%) and Thailand (27%) (Table - 11).

FUTURE OUTLOOK Over 95% of the total production of

Table – 10 : Exports of Dolomite (By Countries) 2011-12

to 1,859,996 tonnes in 2012-13 from 1,594,573 tonnes in 2011-12. Imports were mainly from UAE

dolomite finds outlet mainly in iron and steel

2012-13

and allied industries. The importance of high purity dead-burnt dolomite bricks for lining LD

Country Qty (t) All Countries 40254 Nepal 23571 Bangladesh 11009 Malaysia 2719 Oman 220 UAE 482 Nigeria 65 Singapore 196 Pakistan Tanzania Rep. 229 New Zealand Other countries 1763

Value (`'000)

Qty (t)

Value (`'000)

111825 38038 38760 16491 2010 3409 492 904 1644 10077

28948 10355 9669 5330 561 860 398 223 492 492 135 433

131900 41673 36045 36026 4603 3947 2022 1400 1357 940 873 3014

furnaces has gained ground due to LD process of steel making. At the same time, a few of the steel plants have dispensed with the use of dolomite pin blast furnace. Mini-steel plants generally require dolomite for fettling and refractory purposes only. The resources of the refractory grade dolomite in the country are meagre and this type of material is in short supply but very much required for making tar-bonded dolomite bricks. Therefore, intensive search is needed in non-

Table – 11 : Imports of Dolomite (By Countries) 2011-12

Himalayan regions for locating deposits of

2012-13

Country Qty (t) All Countries 1594573 UAE 915998 Thailand 485740 Philippines 131840 Italy 7576 Brazil Indonesia Germany China 13149 Spain 216 UK 255 Other countries 39799

Value (`'000) 2010748 1014164 588306 159111 185123 8453 968 3856 50767

Qty (t) 1859996 1139424 495863 136890 6901 48761 30844 142 140 291 41 699

Value (`'000) 2529066 1386930 659164 180225 179642 58672 50281 4174 4072 2622 685 2599

massive non-crystalline dolomite, containing less than 2.5% R 2 O 3 for use in tar-dolomite bricks required for lining of LD steel furnaces. The SubGroup - II of the Working Group on Minerals for the 12th Plan has recommended the exploration of low silica dolomite in the states of Andhra Pradesh and Odisha which may be initiated by the State DGMs. The Sub-Group has estimated the apparent domestic demand of dolomite at 6.15 million tonnes by 2011-12 and at 9.46 million tonnes by 2016-17 at 9% growth rate.

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