CO2 Ultimate Reduction in Steelmaking Process (COURSE50 Project)

Transcription

1 CO2 Ultimate Reduction in Steelmaking Process (COURSE5 Project) 23.May.218 General Manager, Technical R&D Planning Division, Nippon Steel & Sumitomo Metal Corporation Shigeaki Tonomura Nippon Steel & Sumitomo Metal Corporation JFE Steel Corporation KOBE STEEL,LTD. Nisshin Steel Co., Ltd., Japan NIPPON STEEL & SUMIKIN ENGINEERING CO.,LTD.

2 1/16 Overview of R&D Activities in COURSE5 (1) Technologies to reduce CO 2 emissions from blast furnace (2) Technologies for CO 2 capture Iron ore Shaft furnace H 2 amplification COG reformer Coke production technology for BF hydrogen reduction Coking plant Reduction of coke Coke BFG BF Chemical absorption Physical adsorption CO-rich gas CO 2 storage technology Regeneration Tower High strength & high reactivity coke Reboiler H 2 Iron ore pre-reduction technology Other project Sensible heat recovery from slag (example) Hot air Slag Coke substitution reducing agent production technology Waste heat recovery boiler Reaction control technology for BF hydrogen reduction Cold air Kalina cycle Power generation Technology for utilization of unused waste heat Absorption Tower CO2 capture technology Steam Electricity Hot metal BOF

3 2/16 NEDO* Technical Review Committee *NEDO: New Energy and Industrial Technology Development Organization (National Research and Development Agency) R&D Organization COURSE5 Advisory Board Commission Project Leader Sub group 7 (evaluation and review of total system) Sub Group 1(Hydrogen reduction) Sub Group 2(COG reforming) Sub Group 3(Improvement of Coke ) Sub Group 4(CO2 separation & recovery) Sub Group 5(Recovery of unused heat) Sub Group 6(Experimental Blastfunace) The COURSE5 Committee of JISF (Japan Iron and Steel Federation) supports the research and development activities of the 5 integrated companies.

4 3/16 Approach Methods Use of non-carbon reductants Sequestration of CO 2 Approach to drastic CO2 mitigation methods (1)Utilization of Hydrogen Natural gas By-product gas Indirect utilization of electricity (2)Direct utilization of electricity hydrometallurgical electrolysis method (3)Utilization of C-neutral reducing agent (biomass, charcoal, waste) Separation and capture of CO 2 Separation from blast furnace gas Chemical absorption Physical adsorption Separation from other processes Smelting reduction on a coal basis Direct reduction on a coal basis

5 Estimation of CO2 elimination Electric furnace steel will increase in future, needs of blastfurnace steel remain still, and countermeasure of blastfurnace must be excuted. 4/16

6 Productivity(kton/year) 5/16 Productivity of Processes 6 Blastfunace MIDREX(Shaft furnace) H/D of Processes(Height/Diameter)

7 6/16 Possibility of Biomass Utilization of biomass is feasible in case existence of vast wooden area like Brazil. In Japan such area is not available.

8 7/16 R&D Schedule

9 8/16 Concept of Iron Ore Hydrogen Reduction Reinforcement Conventional BF COURSE5 BF CO Indirect Reduction: Exothermic Reaction FeO+CO Fe+CO 2 +17,3kJ/kmol 6% 6% H 2 Reduction: Endothermic Reaction FeO+H 2 Fe+H 2 O - 23,8kJ/kmol Blast, Coal O 2, Moist. 1% 3% Carbon Consumption (Target Level) 2% 2% CO,H 2,N 2 CO,H 2,N 2-1% Carbon Direct Reduction: Large Endothermic Reaction FeO+C Fe+CO - 155,kJ/kmol H 2 reductant We develop technologies to control reactions for reducing iron ore by use of H 2 rich reductant to decrease carbon consumption in BF.

10 Heat Balance(kj/kmol) 9/16 Concept of Iron Ore Hydrogen Reduction Reinforcement 5, -5, -1, -15, -2, Direct reduction.3 ipc=1 Direct reduction.3 ipc=.9~.92 Direct reduction.25~.2 ipc=.9~.92

11 1/16 New Experimental Blast Furnace

12 Location and Schedule of EBF Kimitsu No. 4BF Schedule of Experimental BF Design Construction Test operation Trial Experimental Blast Furnace CO 2 separation plant (CAT-3) 11/16

13 12/16 Schematic View of New Experimental Blast Furnace Furnace top Injection tuyere of pre-heating gas Shaft tuyere Shaft sonde (three levels) Tuyere Tap hole

14 13/16 Inside of Experimental Blast Furnace

15 Production Stock level RAR Blast volume Example of EBF Operation rate [above tuyere] (t/d) Hot metal and Slag Oxygen (t/tap) (m) (kg/thm) (Nm 3 /h) (Nm 3 /h) :Plan Coke Blast volume RAR(Coke+Coal) Oxygen 6 4 Stable Burden descent First tap Blow-in Blow-off (215/12/6 22:) :Actual (215/12/8 1:2) Coal Operating time (hr.) 2 1 (215/12/11 16:52) Empty blow-out Just as planned 14/16

16 CO reduction degree (%) Direct reduction degree (%) H 2 reduction degree (%) 15/16 Results of the 1 st Trial of EBF 5 5 Results of 2dimensional calculations. 4 1 st operation (preliminary report) Mathematical model (preliminary report base) 4 1 st operation (preliminary report) Mathematical model (preliminary report base) % 21% 32% 23% 3 2 H 2 reduction degree was increased. 1 Direct reduction degree was decreased. Case1 Case4 Case1 Case4 1 3% Case1 1% 12% 3% Case4 Case1 Case st operation (preliminary report) Mathematical model (preliminary report base) 8 CO reduction degree was almost maintained. 7 66% 69% 65% 66% Calculated results almost agree with operation results, even though, 2 Dimensional calculation base on preliminary operation report. 5 Case1 Case4 Case1 Case4

17 16/16 Acknowledgment COURSE5 has been entrusted by the New Energy and Industrial Technology Development Organization(NEDO) for the research and development of Global warming countermeasure. We deeply appreciate NEDO and Ministry of Economy,Trade and Industry(METI).