WELCOME
ENERGY AUDIT TEAM & AUDIENCEBANGKOK STEEL INDUSTRY PUBLIC CO., LTD.

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BSI LOCATION
27 M.10 Poochaosamingprai Rd.
Phrapradang , Samutprakarn
10130, Thailand
Tel : 02-754-4617
Fax : 02-754-4666
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BANGKOK STEEL INDUSTRY PUBLIC CO.,LTD.
• (1964) Company establishment re-rolling steel mill (Capital 70
M Baht)• (1973) Started manufacture steel bar 25 MT (E.A.F system)• (1978) Major shareholder by Metro company Limited• (1983) Join venture with Nissho Iwai Corp. and Nomura TradingCo., Ltd. to Manufacture galvanized iron steel sheet(C.G.L #1)• (1991) Registered in the Stock Exchange of Thailand• (1992) Constructed C.G.L #2 and C.C.L (Prepainted galvanizedsteel)• (1993) Installed additional 25 MT E.A.F and new Rolling millfactory R.M #1• (1994) Transformed into public company limited byshareholders Meeting Approval (Capital 40 M Baht)• (1996) Constructed another rolling mill R.M #2 and newfactory in Nakornrachasima• (1997) Constructed another new Galvanized steel C.G.L #3 inNakornrachasima
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BSI: MAJOR PRODUCTSCONCREAT REINFORCED STEEL:DEFORM BAR&ROUND BARGRADE: SR 24, SD 30, SD 40, SD 50
SIZE: RB 6, 9, 12, 15, 19, 25, 28
SIZE: DB 6, 12, 16, 20, 25, 28, 32, 40

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BS I
: Melt Shop
(EAF 25 T. x 2 ): Rolling mill(Hot Roll 50 T/h , 70T/h)

5Electric Arc Furnace (EAF)

Scrap Loading

Bucket, Weighing

Charging to EAF

Taping to L/D

Slag taping

Chemical Adjust

EAF Melting
1,550℃

Sample test

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Continues Casting Machine (CCM)

L/D Send to CCM

Ware houseCastingCooling Bed

Cooling

Billet130ROLLING MILL (RM)

Push Billet to
RHF 1,150℃

Discharge toRoll Stand

Rolling (RoughingIntermediate,Finishing)Forming andMarking( Finishing Stand )Ware house

Tying & Tacking

Cutting to Order

CoolingEnergy
Top Management Policy:
Encourage to energy conservationand follow the ministry of energy's
policy10

BSI
EnergyCommittee

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BSI Energy
55 %Electric Energy

45 %Heat Energy

BSI Energy (Electric Energy)
0.63
1.68%%

2.79%
5.74 %

5.44%

Electric Arc
furnace
Motor(> 20kW )38.57%

45.14%

Coolingsystem
Aircompressor
Air
conditioningLightingsystem
Other

BSI Energy (Heat Energy)
0.24%

Heavyoil

13.99%
19.59%

69.18%

DieselOxygenLPGHeavy Oil
5.41%

RHF1

5.41%

RHF2

12.96%
45.56%
35.45%CGL

BoilerOther

Implementation
Example forEnergy
Conservation
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1. Implementation of lighting system
RM. Roof

Original: Metal sheet

Modified: Transparent sheet in some section
Saving: 177,870kWh/y
Saving: 425,000Baht/yBudget: 423,330Baht
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2. Implementation of cooling tower
RM. Cooling tower
Original: Aluminum fan (10.6kgs/paddle
Motor load: 23.7A)
Modified: Glass fiber (6.1kgs/paddle
Motor load 16.3A)
Saving:

7.4A = 1628W × 3sets

Saving:80,077Baht/yBudget:35,000 × 3sets = 105,000Baht

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3. Implementation dryer of QTB
RM. QTB
Original: Used power 24h ×33kW = 792kWh= 546,480Baht
Modified: Used power (1min × 900bar/day x 33kW)/60min = 495kWh= 341,550Baht
Saving: Compress air pipe 10mm. diameter at 7bar
using the power 33kW Speed a bar passing
the QTB consumes is 1min
Saving: 204,930 Baht/yBudget: No budget
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4. Implementation gate of RHF
Original: The gate size at open position is 350 × 700mm.

Modified: The gate size at open position is 180 × 700mm.

Saving:Save energy from heat lost: 43,628.87kJ/h

Saving:7,632L × 13Baht/L = 99,216Baht/yBudget:No budget5. Implementation of air nozzle
for tying machine
Original: Air nozzle is open all the time
Modified: Control by timer & solenoid valve
Saving:Compress air pipe 5mm. diameter at 7bar
using the power 8.3kW

Saving:

137,408.26Baht/yBudget:20,000Baht

6. Implementation of power unit forchain transferOriginal:

Chain transfer use a big hydraulic pumprunning all the time

Modified: Small electric motor running only the bar passing
Electric motor 5.5kW × 24h × 60% running × 300day ×2.3Baht= 54,648Baht
Saving:442,152Baht/yBudget:50,000Baht

7. Replaced pinch roll andRoller conveyer by pipe conveyer
Original: Pinch roll & Roller conveyor 0.75kW × 10sets
Modified: Pipe conveyor (Non use Power )Saving:40.5kWh (291,600kWh/y)

Saving:670,680Baht/yBudget:100,000Baht

8. Implementation of roller conveyorOriginal:

Motor 0.75kW 40sets

Modified: Motor 0.75kW 40sets

Saving:86,940Baht/yBudget:No budgetImplementation on the blower
and bag filler, bag house of dust
collector (MS)Replaced vane type air compressor
by turbo air compressor

Energy Audit In
PROMEEC Team Member
Department of Alternative Energy Development
and Efficiency (DEDE)
Mr. Sarat Prakobchat
Mr. Somchat Tanglikhasit
Mr. VachiraJindaphet
Mr. Chawalit
Boonsang
Mr. Amornsak Rangsakorn
Mr. Pornchai
Thernnoo
Mr. Cheerawat Nuannuam

Energy Audit In
PROMEEC Team Member
BANGKOK STEEL INDUSTRYPUBLIC CO., LTD.

Mr. Somchai Khamphoo
Mr. Taned
Dejamornton
Mr. Pongsthorn Rienthong
Mr. Sumrong Boonchalee
Mr. Pornthep Suwanmanee
Mr. Taweechai Sornchui
Mr. Jakaphol
Nounkhain
Mr. Anan
Thaicharoen

ECCJ
Mr. Hideyuki Tanaka
Mr. Kokichi Takeda

ACE
Ms. Evangeline L. Moises
Mr. Ivan Ismed

Working Step
1. Brief Company History- Name & Foundation of Company- Type of products, Ratio- Capital- Annual Sales- Annual Energy Cost
- Employees, Technician, Engineer, Manager- Energy Conservation Committee

2. Data Collecting- Equipment- Specification- History- Operation plan- Working time
- Drawing & Documents

3. Annual Utility Consumption
4 - 5 years

4. Annual Cost 4 – 5 years- Fuel Cost
- Power Cost

5. Site Inspection
Plan for Inspection- Specified item requires especially- Energy conservation measures implemented so far- High consumption machines

6. Discussion for EC measures- In put Energy: Out put Energy- Data Specification: Inspection- Expected Energy saving: Investment

Energy Audit Results
Data analysis- Energy consumption- Unit consumption- Specific Energy Efficiency Index1. Reheating Furnace: Recommend tocheck, adjust, repair





By Pass Valve of Air Recuperator
Thermocouple of Air Recuperator
Pressure Transducer (Std. + 0.3 to + 0.5 mm H2O)
Decrease Area of door
Insulation (Std. wall < 100 .c , top < 110.c )Oil saving 1.6%

 Air ratio••

m: 1.235 (O2 content, 4 % in flue gas )Std. m < 1.15 (O2 content, 2.74 % in flue gas ), Oil saving ~ 1.3 %Scale loss < 2.4 %•Installation of gas analyzer•Reduction of furnace opening (Charger )•Reduction of door size and opening time

2. Compressed Air

Air Leakage
Capacity of pressure tank
Piping Loss

3. Water pump for EAF

Installation small pump
Installation of Inverter
Impeller Cutting

4. Ladle heating

Heat recovery of waste heat of exhaust gas

5. CCM

Ladle cover during casting( Low Tap temperature Saving ~ 70L/heat ) Heat insulation of molten steel flow
Ladle - Tundish - Mold

6. Billet yardHeat insulation cover for hot Billet
Warm charge to RHF - Hot charge(30 - 130 .c Saving 360kL/y)All the Time

You Ready ToStartEnergyConservation

BSI Energy Conservation
Presentation byMr. Somchai Khamphoo
Tel: 02 754 4617, 081 645 9505
Website: http://www.bangkoksteel.co.th
E–mail: somchai.khamphoo@bangkoksteel.co.th