CONSERVATION & IMPROVEMENT The Siam Construction Steel Co., Ltd. SCSC ENVIRONMENTAL CONSERVATION & IMPROVEMENT

Location The Siam Construction Steel Co., Ltd. (SCSC) , a part of Tata Steel (Thailand) Public Co., Ltd Locate in Map Ta Phut Industrial Estate , Rayong Province , Thailand. asianinfo.org

Production Process SCSC Product Reinforcing Bar Steel Bar

Environmental Improvement The improvement that SCSC try to accomplish Air pollution management Wastewater management Waste management

Environmental Improvement Charging/Tapping Phase Air pollution management 2 units of Bag house filter plants. Bag house Melting Phase Charging/Tapping Phase 1 Flow Rate 540,000 m3/hr Flow Rate 694,000 m3/hr 2 Flow Rate 370,000 m3/hr Flow Rate 580,000 m3/hr

Improvement for Air pollution control Install new bag house filter plant (Fume 2) and new natural cooler. Benefit Increase capacity of dust collecting. Increase efficiency of air cooling. Increase capacity of bag house.

Improvement for Air pollution control Check and repair damage wall to reduce dust leaking out at bag house. Benefit Reduce dust leaking out at bag house. Protect water and Moisture leak into bag house. Increase efficiency of air cooling.

Improvement for Air pollution control Install new filter bag and repair venturi cone. Benefit Improve efficiency of dust collecting. Reduce dust leaking from stack. Increase efficiency purging system.

Improvement for Air pollution control Coat the deck floor and wall of bag house. Benefit Protect water and Moisture leak into bag house. Increase efficiency of purging system. Increase life time of bag filter.

Improvement for Air pollution control Modify chain conveyer. Benefit Reduce residual dust in bag house. Reduce frequency of manual drain residual dust to floor. Increase life time of bag filter.

Improvement for Air pollution control Check and improve purging system. Air purging process (pressure & frequency). Chamber gate (open & close system). Benefit Increase efficiency for cleaning bag filter and extend the life of filter bags. Increase efficiency of bag house. Increase capacity of bag house.

Improvement for Air pollution control The result of opacity analysis from CEMs. Bag house filter 1 Bag house filter 2 mg/m3 Before modify After modify Note : Standard not over 240 mg/m3 Conclusion The result of opacity analysis show after improve and modify dust opacity (emission from stack) was decrease. And the stability of bag house filter plant was increase.

Improvement for Air pollution control Protection of dust spreading while unloading scrap. Before After Benefit : Reduce effect from dust emission. Note : Now SCSC planning to reduce the SO2 , NOx and CO2 emission through the conversion of heavy oil to natural gas in the reheating furnace in year 2011.

Environmental Improvement The improvement that SCSC try to accomplish Air pollution management Wastewater management Waste management

Environmental Improvement Wastewater management Wastewater from production process. Raw water Treatment plant Production process Wastewater treatment Irrigation pond Reuse Retreatment & reuse in process Wastewater from office. water supply Office & Toilet Wastewater treatment Drainage Water water gutter Reuse (plan)

Improvement for wastewater management Install filtering system at water gutter at I7 road gutter and I8 road gutter before drain to public source. Benefit Reduce contaminate by dust and particle in drainage water. Reduce garbage and Waste leaves collected in gutter.

Improvement for wastewater management Improve all water gutter in SCSC for zero discharge water. Benefit Reduce drainage water to zero discharge. Collected drainage water and reuse.

Improvement for wastewater management Re-routing wastewater from scrap yard to treatment and reuse. Benefit Reduce drainage water to zero discharge. Collected drainage water and reuse. Reduce impact of wastewater

Environmental Improvement The improvement that SCSC try to accomplish Air pollution management Wastewater management Waste management

Environmental Improvement Waste management Waste Source Management Remark 1. Slag EAF , LF Recycle , Recovery 2. Scale CCM , RM 3. EAF Dust EAF , Bag house Security landfill Plan to recovery Zn 4. Sludge Sediment tank , Sludge drying bed Landfill 5. Scrap Dust Scrap yard

Improvement for waste management Study to use for raw material in Zn Recovery process. Benefit The benefit use of natural resources worthily and maximize value. Reduce waste disposal by landfill or security landfill. Reduce Cost of waste disposal.

Award and Certificate Award and Certificate Year 1998 Award “ISO9001” Year 1999 Award “ISO/IEC 17025” Year 2003 Award “ISO14001” Year 2005 Award “TIS/OHSAS 18001” Year 2009 Award“Green Star Award from IEAT” Year 2009 Award “CSR – DIW” Year 2010 Award“Green Star Award from IEAT”

CSR-DIW Certificate

..Thank you for attention.. ขอบคุณครับ Kob – Khun – Krub Mr.Parin Teerakathiti & Mr.Kritsada Wanrareun Contact : kritsadaw@tatasteelthailand.com