इंटरनेट मानक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. “जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ” Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru “The Right to Information, The Right to Live” “Step Out From the Old to the New” IS 11092 (2001): Iron Ore Pellets for Direct Reduction Processes [MTD 30: Sponge Iron and Smelting Reduction] “!ान $ एक न’ भारत का +नम-ण” Satyanarayan Gangaram Pitroda ““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee”” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” IS 11092:2001 n fl14- 914+ mRTwmmmNimtlqFTtF Ww6d-fafmz ( imuy~m) Indian Standard IRON ORE PELLETS FOR DIRECT REDUCTION PROCESSES — SPECIFICATION ( Second Revision) ICS 73.060.10 @BIS 2001 BUREAU OF IN DIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 October 2001 Price Group 2 ,.I 1 Sponge Iron and Smelting Reduction Sectional Committee, MTD 30 FOREWORD This Indian Standard was adopted by the Bureau of Indian Standards, after the draft finalized by the Sponge Iron and Smelting Reduction Sectional Committee had been approved by the Metallurgical Engineering Division Council. This standard was first published in 19S4 and subsequently revised in 1991. In this revision, Fe, S, P and moisture contents have been upgraded inview ofthe present requirement of iron ore pellets for direct reduction. In recent years, sponge iron has gained prominence as a feed stock for steel making in electric arc furnace or in oxygen steel making and other steel ‘making processes. Quality of iron ore pellets plays asignificant role for the production of sponge iron by direct reduction, and so it is essential to ensure the supply of suitable quality of iron ore pellets for direct reduction. No marking clause has been included in this standard as iron ore is supplied loose. The composition of the Committee responsible for formulation of this standard is given in Annex A. For the purpose of deciding whether aparticular requirement of this standard iscomplied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS 2:1960 ‘Rules for rounding off numerical values (revised)’. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard. — IS 11092:2001 ----- Indian Standard “-r- IRON ORE PELLETS FOR DIRECT REDUCTION PROCESSES — SPECIFICATION ( Second Revision ) 1 SCOPE 1SNo. Title 8167:1989 Method for determination of 1.1 This standard covers the specification of iron ore reducibility of iron ore and sinter pellets for both solid and gaseous reductant based 8604:1977 Determination of compression direct reduction processes for production of sponge strength of iron ore pellets after iron tobe used inthe production of steel inelectric arc reduction furnace, oxygen steel and other steel making 8624:1995 Method fordetermination ofswelling processes, etc. index of iron ore pellets 1.2 Requirements covered in this standard shall be 8625:1986 Method for determination of crush- met at the point of receipts, unless it is stated ing strength of iron ore pellets otherwise. 9101:1979 Method of sampling iron ore pellets 9660:1980 Guidelines for determination of sof- 2 REFERENCES tening characteristics ofironore pellets The following standards contain provisions which 11283:1985 Method for determination of soften- through reference in this text, constitute provision of ing point of iron oxides (in powder this standard. At the time of publication, the editions form) lump ore, sinter and pellets 1 were valid. All standards are subject to revision, and 11292:1985 Method for determination of relative parties to agreements based on this standard are reducibility of iron oxides : lump encouraged to investigate the possibility of applying ores, sinter and pellets the most recent editions of the standards indicated 3 SUPPLY OF MATERIAL below: -- The material shall be supplied in accordance with the IS No. Title provisions of IS 1387. 1387:1993 General requirem ents for the supply of metallurgical materials (first4 CHEMICAL COMPOSITION revision) 4.1 The iron ore pellets shall conform tothe following 1493 Methods of chemical analysis of iron chemical analysis (dry LOI free basis): ores: Constituent Percentage (Part 1) :1981 Determination of common con- Fe (Total) 66.5 A4in stituents (@f revision) Si@ + A1203 4.0 Max (Part 3) :1987 Determination of titanium CaO + MgO 0.5 A4in chromium, vanadium, calcium and CaO + MgO shall be as agreed magnesium by atomic absorption Si@ + A1203 mutually between the spectrophotometry manufacturer and the (Part 4): 1988 Determination of aluminium by purchaser atomic absorption spectro- s 0.01 Max photometry P 0.04 Max (Part 5): 1990 Determination of copper content by Total of Pb, Zn, Cu, 0.02 Max atomic absorption spectrometric Sn, Cr and As method Alkali (NazO + K20) to be agreed upon (Part 6) :1990 Determination of sodium and/or between the supplier potassium content by atomic absorp- and the purchaser tion spectrometric method 6495:1984 Method of tumbler test for iron However, the actual specification of the ore required . oxides pellets ores, sinter and pellets shall have to be agreed between the purchaser and the (jlrst revision) supplier. 1 . IS 11092:2001 Constituent Percentage IS 8604, shall not be less than 50 kg/pellet tominimize Moisture 3 percent Max during fines generation in furnace and handling system. ::.- dry season and 7 REDUCIBILITY . 6pereent Max during :, , 7 rainy season or as 7.1 The reducibility of the iron ore pellets (dRJdt at agreed upon in both 40 percent reduction) shall be 0.6 percent/rein cases minimum, when determined by the method specified in IS 8167. 4.2 The chemical analysis of the iron ore pellets shall be determined by the method specified in IS 1493 and 7.2 The relative reducibility of the iron ore pellets at IS 1493 (Parts 1, 3, 4, 5 &6) as per latest version of the end of three hours shall be 65 percent, minimum any other established, instrumental/chemical method. when determined asper the method given inIS 11292. In case of dispute, the procedure in the latest edition 8 SWELLING INDEX of IS 1493 for chemical analysis shall be the Referee Method. The swelling index of the iron ore pellets when determined in accordance with IS 8624 shall be 5 SIZE 18percent, Max. 5.1 The size range for iron ore pellets at the point of 9 SOFTENING CHARACTERISTICS dispatch shall be asfollows. Requirements forthe iron ore pellets at the point of dispatch isapplicable to this 9.1 Softening characteristics of iron ore pellets (in clause only, as degradation of iron ore pellets may powder form) shall be determined in accordance with occur during transportation: IS 9660 and itsrequirement shall be agreed tobetween +19 mm 5percent, Max the supplier and the purchaser. A typical value of the –19 +9 mm 85 percent, Min start of softening temperature should be 1 125°C –9 +5mm 5percent, Max minimum. –5mm 5 percent, Mux 9.2 The softening point of the pellets (in powder 5.2 The screen analysis of the material at the point of form) when determined as per IS 11283 should show receipt depends onthe handling and transportation and a softening start temperature of 1 125”C. shall, therefore, have tobe agreed ketween the supplier 10 TUMBLER INDEX and the purchaser. Tumbler index of iron ore pellets shall be 92 percent 6 COMPRESSIVE STRENGTH Min on + 6.3 mm and 6 percent Max on -0.500 mm -- 6.1 Compressive Strength Before Reduction when determined in accordance with IS 6495. The average compressive strength of the iron ore 11 SAMPLING pellets carried out on aspecified number of individual Representative samples of iron ore pellets shall be pellets in a specified size range, w hen determined in drawn according to the scheme of sampling given in accordance with IS 8625 shall not be less than IS 9101. 200 kg/pellets. Pellets with a strength less than 80 kg/pellet shall not exceed 5percent. Reduction Degradation Index (RDI), Thermal Degradation Index (TDI) (For Shaft DRI processes) 6.2 Compressive Strength After Reduction and/or Low Temperature Breaking Test (LTBT) in The average compressive strength of the pellets after Linder Apparatus (for rotary kiln DRI processes) may reduction, when determined in accordance with be considered for the high temperature strength assessment wittdwithout reduction of iron ore pellet for DRI processes. This is for lumps also. 2 IS 11092:2001 ANNEX A --- -m (Foreword) COMMITTEE COMPOSITION Sponge Iron & Smelting Reduction Sectional Committee, MTD 30 Organization Representative(s) Tata Iron& Steel Co Ltd, Jamshedpur DRAMITCHATMPJEE(Chuimarr) Central Fuel Research Institute, Dhanbad REPIWSENTATtVE Essar Steels, Mumbai SHRIK.JYomn Gas Authority ofIndia, New Delhi SHRIR.G.RAIAN SHRIP.S.SAREEN(Alternate) GSAL Ltd, Hyderabad SHRIK.P.PATNAIK SHRIK.S.N.MURTHY(Alternate) HEG Ltd, Durg SHRIS.N. MISHRA Ispat Industries Ltd(NippoDenro), Raigad SHRIV.V.JAMNIS SHRIA.K.SAXENA(Alternate) Jindal Steel& Power Ltd, Raigarh SHRIK.C.‘BJATOI SHRIU. BHAITACHRSE(AElternate) Kudremukh IronOre Co Ltd, Chikmaglur SHRIT.R.R.RAO MECON (India) Ltd, Ranchi SHRIP.BHAITACHARYA SHRJA.K.AGRAWA(LAlternate) Ministry ofSteel, New Delhi SHRID,KASHIVA SHRIS. K.BHATNAGA(ARlternate) M. N. Da.stur&Co (P) Ltd, Kolkata SHRIADHIPSENGUnA MsADITITARAFDAR(Alternate) Monnet lspat Ltd, Raipur SHRIB. L.VERMA Mukand Ltd, Thane SHRIC.H.SHARMA National Metallurgical Laboratory, Jamshedpur DRSWATANTRAPRAKASH National Mineral Development Corporation Ltd, Hyderabad REPRESENTATIVE Nova Iron &Steel Co Ltd, Bilaspur SHNA. RAJASEKARAN SHRIB.GDPICHAN(DAlternate) Orissa Sponge Iron Ltd, Dlstt Keonjhar SHRIN.K.PAINAIK SHRIS.C.JENA(Alternate) Prakash Industries, New Delhi REPRFS?NTATJVE Raipur Alloys, Raipur SHRIN.~m+ SAIL, R&D Centre, Ranchi SHRIG.LS.CHAUHAN DRK.K.PRASAD(Alternate) Sponge Iron Manufacturers’ Association, New Delhl SHRIS.S.BHATNAGAR Sponge Iron India Ltd, Khammam SHRJM.AMARSSHWARRAO Steel Furnace Association ofIndia, New Delhi SHRJM.S.UNNJNAtR Sunflag India Ltd, Bhandara SHRSD.K.GAUR SHRIS.P.DASH(Alternate) TATA Sponge Iron, Distt Keonjhar SHRIB. M.SARANGI Usha (India) Ltd, New Delhi SHRIB. K.ROY Vikram Ispat, Mumbai DRS.K.S.YADAV BIS Directorate General SHRIN.Mnm, Director&Head(MTD) [Representing Dkector General (Ex-oficio Member)] Member Secretary SHRIRAMAWADHRAM Deputy Dkector (MTD), BIS 3 I ‘L--J Bureau of Indian Standards BIS is a statutory institution established under the Bureau of Indian Standarak Act, 1986 to promote harmonious development of the activities of standardization, marking and quality certification of goods and attending to connected matters in the country. Copyright BIS has the copyright of all its publications. No part of these publications may be reproduced in any form without the prior permission in writing of BIS. This does not preclude the free use, in the course of implementing the standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating to copyright be addressed to the Director (Publications), BIS. Review of Indian Standards Amendments are issued to standards as the need arises on the basis of comments, Standards are also reviewed periodically; a standard along with amendments {sreaffirmed when such review indicates that no changes are needed; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standards should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of ‘BIS Catalogue’ and ‘Standards: Monthly Additions’. This Indian Standard has been developed from Doc :No. MTD 30( 4293) Amendments Issued Since Publication Amend No. Date of Issue Text Affected i, BUREAU OF INDIAN STANDARDS Headquarters : Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002 Telegrams : Manaksanstha Telephones :3230131,3233375,323 9402 (Common to all offices) Regional Offices : Telephone Central : Manak Bhavan, 9 Bahadur Shah Zafar Marg 3237617 NEW DELHI 110002 { 3233841 Eastern : 1/14 C.I.T. 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