INTERNATIONAL CONFERENCE ON INDIAN STEEL INDUSTRY: “CHALLENGES AND OPPORTUNITIES” 23 rd -24 th MARCH 2012 M.N. Dastur & Company (P) Ltd STEELMAKING THROUGH EAF ROUTE AND ITS EFFECT ON ENVIRONMENT BY DURBA TALUKDAR & SOMNATH GUPTA M.N.DASTUR & COMPANY (P) LTD, KOLKATA
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STEELMAKING THROUGH EAF ROUTE AND ITS EFFECT ON ENVIRONMENT BY DURBA TALUKDAR & SOMNATH GUPTA
STEELMAKING THROUGH EAF ROUTE AND ITS EFFECT ON ENVIRONMENT BY DURBA TALUKDAR & SOMNATH GUPTA M.N.DASTUR & COMPANY (P) LTD, KOLKATA. CO 2 EMISSIONS BY GLOBAL STEEL INDUSTRY. 2. ENERGY INTENSITY OF STEEL INDUSTRY. 3. SPECIFIC ENERGY CONSUMPTION (Unit : GCal/TCS). 4. - PowerPoint PPT Presentation
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INTERNATIONAL CONFERENCE ON INDIAN STEEL INDUSTRY: “CHALLENGES AND OPPORTUNITIES”
23rd -24th MARCH 2012M.N. Dastur & Company (P) Ltd
STEELMAKING THROUGH EAF ROUTE AND ITS EFFECT ON ENVIRONMENT
BYDURBA TALUKDAR & SOMNATH GUPTA
M.N.DASTUR & COMPANY (P) LTD,KOLKATA
INTERNATIONAL CONFERENCE ON INDIAN STEEL INDUSTRY: “CHALLENGES AND OPPORTUNITIES”
23rd -24th MARCH 2012M.N. Dastur & Company (P) Ltd
CO2 EMISSIONS BY GLOBAL STEEL INDUSTRY
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INTERNATIONAL CONFERENCE ON INDIAN STEEL INDUSTRY: “CHALLENGES AND OPPORTUNITIES”
23rd -24th MARCH 2012M.N. Dastur & Company (P) Ltd
ENERGY INTENSITY OF STEEL INDUSTRY
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INTERNATIONAL CONFERENCE ON INDIAN STEEL INDUSTRY: “CHALLENGES AND OPPORTUNITIES”
23rd -24th MARCH 2012M.N. Dastur & Company (P) Ltd
SPECIFIC ENERGY CONSUMPTION (Unit : GCal/TCS)
Plant 2007-08 2008-09 2009-10 2010-11(Apr – Dec 2010)
SAIL 6.95 6.74 6.72 6.82
BSP 6.72 6.5 6.56 6.66
DSP 6.94 6.5 6.55 6.78
RSP 7.39 7.09 6.97 6.89
BSL 6.89 6.83 6.74 6.88
ISP 8.14 8.18 8.18 8.23
RINL (GCal/TLS)
6.21 6.54 6.09 6.18
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INTERNATIONAL CONFERENCE ON INDIAN STEEL INDUSTRY: “CHALLENGES AND OPPORTUNITIES”
23rd -24th MARCH 2012M.N. Dastur & Company (P) Ltd
SPECIFIC ENERGY CONSUMPTION(Unit : GCal/TCS)(Continued)
Source: 1. Sail News – February – June 20102. Annual report 2010-11, Ministry of Steel, Govt. of India
Note: **BF and Sinter Plant were under capital repair for approx 6 months.
Plant 2007-08 2008-09 2009-10 2010-11(Apr – Dec 2012)
TaTa Steel 6.555 6.587 6.173 (Apr-Dec 2009)
NA
JSW Steel 6.847 6.704 6.495 6.31
JSPL 7.68 7.25 7.14 6.98
Essar Steel 5.99 5.81 NA NA
IIL 5.73 5.42** 5.46 (Apr-Sept 2009)
Merged with JSW
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INTERNATIONAL CONFERENCE ON INDIAN STEEL INDUSTRY: “CHALLENGES AND OPPORTUNITIES”
23rd -24th MARCH 2012M.N. Dastur & Company (P) Ltd
STEEL PRODUCTION THROUGH ELECTRIC FURNACES IN INDIA
INTERNATIONAL CONFERENCE ON INDIAN STEEL INDUSTRY: “CHALLENGES AND OPPORTUNITIES”
23rd -24th MARCH 2012M.N. Dastur & Company (P) Ltd
EAF SLAG
• COMPOSITION Main constituent – Calcium Oxide and Iron Other minor constituents - Magnesium, Manganese, Silicon, Aluminium
• APPLICATION Land Filling Road Construction Aggregate for concrete Clinker Kilns as a replacement for mined limestone Reuse in internal processes Soil conditioner Making prefabricated shapes for sewerage
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INTERNATIONAL CONFERENCE ON INDIAN STEEL INDUSTRY: “CHALLENGES AND OPPORTUNITIES”
23rd -24th MARCH 2012M.N. Dastur & Company (P) Ltd
EAF DUST
• COMPOSITION Main constituent – Iron Other constituents – Zinc in the form of oxide/sulphide/chloride
Lead as oxide, Cadmium, other metals, halides and fluxes
• Treatment Recycling back into the furnace High temperature metal recovery processes Hydrometallurgical and pyro-metallurgical processes
• APPLICATION Reuse in EAF Landfilling Extraction of Zinc Use in rotary hearth furnace
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INTERNATIONAL CONFERENCE ON INDIAN STEEL INDUSTRY: “CHALLENGES AND OPPORTUNITIES”
23rd -24th MARCH 2012M.N. Dastur & Company (P) Ltd
GASEOUS EMISSIONS
• Harmful SubstancesOxides of carbon Oxides of nitrogen Oxides of sulphur Cyanides Fluorides
• Measures adopted Improved Fume extraction system and control
technologies Furnace off gas analysis system
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INTERNATIONAL CONFERENCE ON INDIAN STEEL INDUSTRY: “CHALLENGES AND OPPORTUNITIES”
23rd -24th MARCH 2012M.N. Dastur & Company (P) Ltd
DEVELOPMENTS IN EAF PROCESS ROUTE
• Development of Shaft Furnace, Consteel Process and other processes
• The processes developed lead to : Lower noise level Lower dust content in off gases Reduced off-gas volume Full heat incineration of carbon-monoxide
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INTERNATIONAL CONFERENCE ON INDIAN STEEL INDUSTRY: “CHALLENGES AND OPPORTUNITIES”
23rd -24th MARCH 2012M.N. Dastur & Company (P) Ltd
TECHNOLOGICAL DEVELOPMENTS IN EAF
Period Technological Development
Tap-to-Tap Time
Electricity Consumption
(kWh/t)
Electrode Consumption
(kg/t)1965-70 Oxygen lancing 180 630 6.5
1970-80 -Water cooled panels-High power operation (UHP)