NSblade TM / Advanced Air Knife for Hot Dip Continuous Galvanizing Line

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1 NSblade TM / Advanced Air Knife for Hot Dip Continuous Galvanizing Line Yuta SUMITOMO Hatsuki KAKUNO NIPPON STEEL & SUMIKIN ENGINEERING CO., LTD., JAPAN *NS means Nippon steel and Sumikin Engineering

2 History of NSblade TM 2010 Start the Development Pilot line test: Tech. development 2013 Trial at Production Line Supply 1 st commercial NS blade 2016 Start the operation at more two site. Accumulate the results 2

3 1 2 Contains of Today s presentation 2010 Start the Development Pilot line test: Tech. development 2013 Trial at Production Line Supply 1 st commercial NS blade 2016 Start the operation at more two site. Accumulate the results 3

4 1 2 Contains of Today s presentation 2010 Start the Development Pilot line test: Tech. development 2013 Trial at Production Line Supply 1 st commercial NS blade 2016 Start the operation at more two site. Accumulate the results 4

5 Concept of NSblade TM Technology We listen to voice of users We want to increase Line speed for production. We want to improve Zn consumption and Dross loss. it is necessary to improve Edge quality for End user. Environment improvement like Noise is needed. Established NSblade TM Technology 5

6 Ordinary nozzle jet issue <Top of view> Wiping width(> Strip width) Wiping gas flow Strip Nozzle Impinging jet Jet collision Collision jet issue causes Splash Noise Edge over coat 6

7 Outside baffle plate issue <Top of view> Wiping width (> Strip width) Strip Wiping gas flow Nozzle Baffle plate Strip NOZZLE Edge baffle plate Less than 5mm Ineffective condition Dross Outside baffle plate issue causes Hardness of Operator s adjustment Dross 7

8 Development of NSblade TM Wiping nozzle blade Wiping gas flow Tracking blade Strip Cross section of nozzle Technological Feature No outside baffle Optimal nozzle width No collision jet 8

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10 1 2 Contains of Today s presentation 2010 Start the Development Pilot line test: Tech. development 2013 Trial at Production Line Supply 1 st commercial NS blade 2016 Start the operation at more two site. Accumulate the results 10

11 High speed coating test using NSblade TM Schematic of experiment apparatus Operating condition Strip size: 280mm 0.71mm Zinc temp.: 460 degree Line speed: 180mpm Pressure : 40 kpa Point Generation of splash in high speed operation Air pressure Sound meter 1.5m Camera Nozzle gap Nozzle Zinc temperature :460 11

12 Test results / Edge splash (Front view and side view) Without NSblade TM With NSblade TM 12

13 Test results / Edge splash (Front view and side view) Wiping nozzle Edge splash Reduce Edge Splash Front view Side view Front view Side view (a) Ordinary nozzle (b) NSblade TM NSblade TM can achieve Splash reduction at high speed operation 13

14 3D fluid analysis for air flow near the strip edge Z Z X Y X Y Flow velocity vector 14

15 1 2 Contains of Today s presentation 2010 Start the Development Pilot line test: Tech. development 2013 Trial at Production Line Supply 1 st commercial NS blade 2016 Start the operation at more two site. Accumulate the results 15

16 Accumulate the results ~Latest supply records~ SEAISI 2015 total 2 SEAISI

17 Supply Record List No. Customer Project Products Country Year 1 Rachashima (Trial use) CGL GI Thailand Ton Dong A No.4 CGL GL (55%Al) Vietnam A Company CGL GI Malaysia Ton Dong A No.3 CGL 5 Tianjin Xinyu New CGL GL (55%Al) GL (55%Al) Vietnam 2016 China B company CGL GL Indonesia PT TATAMETAL CGL GI,GL Indonesia

18 Relative coating weight Latest commercial line result (1/4) Edge coating weight distribution 180% 160% 140% 120% 100% NS blade OldAK 180% 160% 140% 120% 100% 80% Left side Distance from strip edge [mm] % Right side Operating condition Target : AZ70 Line speed : 100 mpm Strip size : 1200mm 0.4mm 18

19 40 Latest commercial line result (2/4) NS blade OldAK % 160% 140% 120% 100% 80% *EDGE OVER COAT* over 20% IMPROVEMENT Stagger coil Flat coil NSblade Stagger Flat 19

20 Latest commercial line result (3/4) Dross reduction result Old Air knife :100 NSblade TM :76 NSblade TM achieved approx. 24% dross reduction. *Referred by A Company 's dross report (Jan.,2016-Nov.,2016). *This result is just one example. It depends on operating condition. 20

21 Latest commercial line result (4/4) Noise reduction TM NSblade TM reduced approx. 10 db noise. Talk capability range : under 70dB Distance effect 16m = -24 db / 54 m = -34 db (ref. sokyo web page / *Old AK (No baffle) : measured at Jun.,2016 *NSblade TM : measured at Aug.,

22 updating technology Standard equipment Online nozzle tilting system Option Nozzle cleaner To be continued for next development *Image is for illustration purposes. 22

23 Conclusion Advanced air knife/ NSblade TM allows for high quality production and wide production range. NSblade TM users are on the increase in all ASEAN. In our latest operation results, dross reduction and edge quality improvement were founded. NSblade TM s option accessory equipment will be gradually enforced for responding any users. 23

24 Thank you for your attention. 24

25 Advantage of NSblade TM 1. Non contact baffle built in nozzle control nozzle width 2. According to the jet effect, EOC and splash shall be avoided even at high speed operation BLADE Nozzle Wiping width ( Strip width) Wiping gas flow 3. Noise and dross reduction can be provided by minimizing air jet Position variable *EOC: Edge over coating 25