the long way to pci in linz – first operation...

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THE LONG WAY TO PCI IN LINZ –FIRST OPERATION EXPERIENCE14.09.2016 / Bernhard RummerECIC 2016 / 7th European Cokeand Ironmaking Congress

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Content

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Ø History of reducing agents in Linz

Ø PCI-project requirements and constraints

Ø Technical concept - layout and flowsheets

Ø Commissioning

Ø Coal injection stability and deviation between single injection lances

Ø Summery


Ironmaking facilities in Linz

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Blast Furnace BF 5 BF 6 BF A

Last Relining [Year] 03.2015 09.2009 10.2004

WorkingVolume [m3] 1.175 1.201 3.125

HearthDiameter [m] 8,0 8,0 12,0

Bell Less Top - Z & J Z & J Paul Wurth

Tuyeres [No.] 17 17 32

Tapholes [No.] 1 1 3

NominalCapacity [t/d] 1.850 1.850 7.850


Historical timeline of reducing agents in Linz

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End of 90´s since 2000 2002 2006 2010 since 2014

Coke (Linz) Coke (Linz) Coke (Linz) Coke (Linz) Coke (Linz) Coke (Linz)

Heavy oil Heavy oil Heavy oil Heavy oil Heavy oil Heavy oil

Tar oil Coke (abroad) Coke (abroad) Coke (abroad) Coke (abroad) Coke (abroad)

Crude tar Crude tar Crude tar Crude tar

Coke oven gas Coke oven gas Coke oven gas Coke oven gas

Waste plastics Waste plastics Waste plastics

Crude tar (abroad) Crude tar (abroad)

Natural gas Natural gas

PCI


PCI-project requirements and constraints

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Ø Reducing agents for the future: BF5 and BF6 only coal, backup coke oven gas(injected) BFA coal, waste plastics and crude tar, backup natural gas

No heavy oil on any BF

Ø Injection capacities: 20 t coal/h at BF5 and 20 t coal/h at BF660 t coal/h at BFAthis means up to 180kg PCI/tHM

Ø easy coal logistics (supply, unloading,…) and synergy effects with the coke plantØ coal stock capacity for at least 15 daysØ high operational availability of the PCI-plantØ additional emissions (dust,...) have to be avoidedØ save rare space around the BFsØ No change of the burden and coke quality for the economic feasibility study


Layout of the PCI-plant

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Layout of the PCI-plant

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Flowsheet of the PCI-plant

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Raw coal & grinding-drying

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Layout - raw coal preparation

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Project phases / milestones - key supplier

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Ø 7 pre-project between 1989 – 2010

Ø last pre-project 05/2010 - 03/2011Ø order awarded to Küttner 11/2012Ø start of construction 03/2013Ø start injection BF-A 03.11.2014

BF5 02.03.2015BF6 16.03.2015

supplier / key componentsCrane Hyundai

Raw Coal Preparation BTW Binder / Siemens

Grinding and DryingMain Supplier PCI

Küttner

Coal Mill Alstom

Bag Filter Lühr

Hot Gas Generator Lösche

Injection Plant ESCH


Development of the PCI-rate at BF A

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Coal injection stability at BFA

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mass flow measurement (10-minute average)


PCI at BF6 – problems with coal flow measurement

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Deviation of single injection lines at BF A

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Ø flowmeters in series (adjusted):deviation between massflowmeters of +/- 5% was found

Ø The differences between thelances were in a range of +/- 8%on all three BFs

Ø Values up to 50% from literaturecan not be confirmed


Summery

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Ø The project was done on schedule and within budget

Ø The commissioning took place without major problems on all BFsand the performance data were achieved

Ø So far we have no problems on the fine coal transport-lines over1.800m from the grinding to the injection plant near the BFs

Ø The used mass flow measurements aren’t reliable – further testswith new products will follow

Ø During the drying and grinding process coal mine gas is released –the additional installation of a waste gas treatment is necessary tofulfill the strict emission limits in Linz

voestalpine Steel Division| |17 14.09.2016 ECIC 2016

Thanks for your attention !

the long way to pci in linz – first operation...

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