Effective Waste Management in Steel Manufacturing.
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Transcript of Effective Waste Management in Steel Manufacturing.
Effective Waste Management in Steel Manufacturing
Career summaryPossess +20 years of experience in the field of Environmental and IH Engineering Educational • Masters in Environmental & Water Resources from KFUPM,
Dhahran, KSA - 1996 • Dip in Business Administration – Bangalore University - 1992 Professional Certification • Qualified Environmental Professional ( QEP) from Pittsburg –
USA - 2005• Radiation Safety Officer from KACARE - KSA, 2011SHUAIB SALMAN
Senior Environment Engineer Saudi Iron and Steel Co. (Hadeed)
Table of content Introduction
Overview of Steel Process
Mission and Vision
Challenges
Onsite Storage
Waste Classification
Type of By Products / Waste (DR Plant , Steel Plant & RM) Disposable Wastes
Key to Success
Acknowledgement
Waste Management is a global problem - each year millions of hectares are lost …
Consequently, effective waste management is a crucial part within the operations of all organization's
Introduction
Industrial operations generate waste, must find proper reuse / recycling options, Exercise control during storage / disposal and must opt for Environmental friendly options
Overview of Steel Process
Steel Industries generate large quantity of by-products/wastes. Generation of byproducts/waste during industrial activity is inevitable. However with efforts and innovative ideas potential reuse/recycle options can be explored to conserve the natural resources.
Saudi Iron and Steel Co (HADEED) Affiliate of SABIC is the only steel making subsidiary of SABIC. Its an integrated steel making company that comprises of
Direct Reduction (DR) PlantSteel Plant (SP) (Long Product & Flat Product Facility)Rolling Mill (Hot Strip Mill & Cold Rolling Mill)
Mission : To be provider of competitive steel products through employees empowerment with Safe and environmentally sounds practicesVision : To be the leading producer and marketer of steel products in the middle East & North Africa
Mission & Vision
Challenges
As a commitment to the protection of natural resources, company made efforts in carrying out research to find potential reuse option that is sustainable and environmental friendly.
Waste Classification
During the steel making the following :
• Municipal Waste: Includes refuse, food waste, paper, carton, etc. from offices and cafeteria.
• Inert Waste : Ex., Construction materials, wood, paper etc.
• Industrial waste: Generated from production process.
Types of Byproducts/wastesTypes of Byproducts/wastes
Plant Type of byproducts / Waste
DR Oxides FinesDR SlurrySP EAF Dust SP Slag
RM/SP Mill ScaleCMC Ferric/Red Oxide
Maintenance Mixed Miscellaneous Waste
Byproducts /Waste from DR Plant
Oxide Fines (<6 mm)
Iron Ore
Slurry
DR Plant (+6 mm)
Oxide Fines ( < 6mm)
Iron Ore is screened , +6mm containing (96%-97% Fe2O3) is used for Production. Less than 6mm is the byproducts which is called as Oxide fines
Oxide Fines are used in cement industries as a raw material to manufacture cement.
Oxide Fines are also used in making briquettes and used back in the furnace.
Current Use:
2013 20140
50000
100000
150000
200000
250000
300000251212
195230212539
160415
Generated Sold
Oxide Fines ( < 6mm) Management
Slurry
Process and Thermal fragmentation in the reduction process generate fines within the furnace. The fines are diverted to clarifier where it is sedimented as sludge.
Slurry is predominantly similar to Ore fines but finer and laden with moisture.
Slurry Management
Slurry is used in cement industries as a raw material to manufacture cement.
Also used in Making Iron Pellets by pelletizing plants
2013 20140
20000
40000
60000
80000
100000
120000115197
9660896405
84233
Generated Sold
Byproducts /Waste from Steel Plant
Mill Scale
EAF Dust
Slag
SLAG
Slag is a major byproduct generated steel production from EAF & LF.
Until potential option were found the generated quantity of slag was being stored within the premises .
Solution: R&D work was carried in Research labs such as Ministry of transport Riyadh, KFUPM and German Slag Research Institute.
Based on studies and field trials, it was found Slag is excellent feed/additive for the following:• Road Asphalt Pavement
• Road sub base
• Concrete for Nuclear Radiation Shielding
• Production of Silico Manganese & Ferro Silica
• Used as Filter bed Media
SLAG Management
Cao30%
MgO10%
SiO215%
Feo37%
Mno3%
Al2O3 5%
It is successfully used in the following projects/areas:
• Ministry of Roads and Transport - Dammam Airport Road
• Dammam Kuwait Road• Municipality of Dammam, Khobar,
Jubail Roads.• Gazlan Power Plant• Sabic Industries
SLAG Management
2013 2014560000580000600000620000640000660000680000700000720000740000
726555
623428
726555
623428
Generated Sold
EAF Dust
Melting operation in Electric Arc Furnace (EAF) generates fumes with dust.
Dust is filtered off from flue gas/fumes via bag filters and stored onsite for recycling.
Hadeed together with Sabic conducted research at king Saud University to find the reuse options.
Continued…
The research studies concluded the material has advantages when used as additive with cement.
can be used as an effective set retardant for concrete and can substitute the chemical retardants used presently
Property EffectSetting time of concrete Increased
Compressive strength Increased (10 - 20%)
Flexural and Bond Strength Improved
Concrete Corrosion Potential Reduced
Uses as a set Retarder Uses as a set Retarder
(Austria, Germany,France, Italy and UK)
Use of Electric Arc Furnace By-products in concrete
1. US Patent for use of EAF Dust
2. European Patent for use of EAF Dust
2013 20140
5000
10000
15000
20000
25000
30000
35000
4000039162
23088
39162
23088
Generated Sold
Site Studies
Mill Scale
Mill scale is byproduct generated during casting and rolling operation of steel billets and slabs.
Mill Scale
Current Uses:
• Utilized by cement manufacturing companies•Mill scale is recycled back into the furnace for steelmaking• Used for the manufacturing of ceramics.
Mill Scale Management
2013 20140
10000
20000
30000
40000
50000
60000
70000
80000
90000 83173
6651969476
56994
Generated Sold
Red Oxide
Red Oxide is generated from pickling (Cold Rolling Mills)
Generation is about 2500 t/year. It is packed in jumbo bags and sold to Paint, Construction and Brick manufacturing companies.
1390263 1348758
2494
2013
Generated Sold Disposed
SummaryUp to 3rd Qtr.2014
1110234
1072280
1152
Up to 3rd Qtr. 2014
Generated Sold Disposed
Waste generated from production & maintenance are stored in designated areas and sent to disposal companies.
• Oily Sludge• Fluorescent Tubes• Liquid Waste Chemical• Expired Paints & Chemicals• Oil Absorbent• Clinic Waste, etc..
Disposable Waste
<1 % of total byproducts/waste are sent as waste to disposal companies for landfill, incineration etc..
Key to Success
• Compliance with Regulations.• Adherence to company EHSS Policy• Commitment towards continual
improvement of our environment• Non value added byproduct/waste to value
added commodity.
PREVENT/REDUCE
REUSE
RECYCLE
TREAT
DISPOSE
Today we are proud 96% of generated byproducts/waste are sold to other industries.
• Would like to thank HADEED Management for their commitment and support in achieving this success.
• Thanks to RC for their encouragement and support in promoting waste reduction programs and giving us the opportunity.
Acknowledgement
Every Gift to the Environment makes a difference
Thank you