fast analysis of slag chemistry during secondary … · 2 estad 2017 – disstec seminar on...

1ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y

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Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y

PIE

RR

ET

Jea

n-C

hris

toph

e

2ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


Conte

xt

–w

hy/how

measu

ring s

lag c

hem

istr

y ?

�W

hy :

Im

pact

of

slag c

hem

istr

y:

�Repart

itio

n r

ati

o o

f Cr,

P…

O u

sage –

addit

ion y

ield

�D

esu

lphuri

zati

on o

f st

eel

at

ladle

furn

ace d

epends

on t

em

pera

ture

,

am

ount

of

oxygen a

nd s

ulp

hur

in t

he s

teel,

but

main

ly o

n c

hem

ical

com

posi

tion a

nd p

hysi

cal pro

pert

ies

of

slag.

�The s

teel cle

anliness

is

dir

ectl

y a

ffecte

d b

y t

he %

CaO

/%Al 2

O3

rati

o,

slag

basi

cit

y,

fluid

ity,

and o

xygen a

cti

vit

y in t

he s

lag

�Refr

acto

ries

life

tim

e

�Recycla

bilit

y o

f sl

ags

�H

ow

: M

easu

rem

ent

means:

�Sam

pling :

cost

s and long d

ela

y /

poin

t w

ise m

easu

rem

ent

�D

irect

measu

rem

ent

(OES,

LIB

S,…

) :

validit

y,

accura

cy,

hars

h w

ork

ing

condit

ion,

life

tim

e

3ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


Sum

mary

�Term

inate

d R

FCS p

roje

cts

�AVAS (

dir

ect

measu

rem

ent

-O

ES)

�BO

FD

YN

(sa

mpling a

t convert

er)

�IN

QU

ISS (

sam

pling,

dir

ect

measu

rem

ent

-LIB

S)

�O

ther

refe

rences

�O

ES m

easu

rem

ent

at

EAF

�O

ES m

easu

rem

ents

at

convert

er

�LIB

S d

irect

measu

rem

ents

of

slag c

om

posi

tion

�O

n-g

oin

g R

FCS a

cti

vit

ies

�O

SCAN

EAF (

dir

ect

measu

rem

ent

-O

ES)

4ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


AVAS :

Feasi

bilit

y o

f a f

ast

vacuum

sla

g a

naly

sis

by lase

r O

ES in

secondary

ste

elm

akin

g

�W

ork

ing p

eri

od:

01/09/2003 –

31/08/2006

�Conso

rtiu

m :

Dillinger

Hütt

en

(D),

AM

MR (

F),

Fra

unhofe

r(D

), S

aars

tahl

(D)

�O

bje

cti

ves

:

�To p

rove t

he f

easi

bilit

y o

f a f

ast

sla

g a

naly

sis

at

the v

acuum

degass

er

for

bett

er

pro

ducti

on c

ontr

ol

in s

econdary

ste

elm

akin

g w

ith t

he e

mphasi

s on

SiO

2,

CaO

and A

l 2O

3.

�Com

pari

son w

ith X

RF m

easu

rem

ents

(dir

ectl

y o

n c

ast

ed s

lags

and/or

aft

er

pre

para

tion).

�M

ain

resu

lts

:

�In

vest

igati

on o

f th

e f

easi

bilit

y o

f fa

st s

lag a

naly

sis

for

a b

ett

er

contr

ol

duri

ng t

he s

econdary

meta

llurg

y p

rocess

�The p

roje

ct

was

unable

to p

roduce r

eliable

resu

lts

regard

ing t

he f

ast

sla

g

analy

sis

usi

ng lase

r O

ES m

eth

od.

Furt

herm

ore

, th

e o

bta

ined r

esu

lts

in

som

e c

ase

s w

ere

als

o irr

epro

ducib

le.

5ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


BO

FD

YN

: D

ynam

ic e

nd-p

oin

t contr

ol in

BO

F t

hro

ugh a

fast

and

sim

ult

aneous

dete

rmin

ati

on o

f th

e s

teel/

Sla

g c

om

posi

tion

�W

ork

ing p

eri

od:

01/09/2003 –

31/12/2006

�Conso

rtiu

m :

CRM

(B),

Hera

eus-

Ele

ctr

onit

e(B

), A

MM

R (

F),

SIM

R (

F)

�O

bje

cti

ves

:

�To s

hort

en t

he t

ap t

o t

ap t

ime in B

OF p

lants

in o

rder

to incre

ase

the

pro

ducti

vit

y.

�To u

se a

dedic

ate

d lase

r m

eth

odolo

gy f

or

a r

apid

dis

cri

min

ati

ve

dete

rmin

ati

on o

f M

n,

P,

and S

conta

ined in t

he m

elt

phase

s.

�To d

evelo

p a

new

pro

cess

contr

ol

base

d o

n t

he u

se o

f new

in-b

low

sam

ple

rs d

eliveri

ng h

ete

rogeneous

sam

ple

s com

pose

d o

f st

eel

and s

lag.

�Could

be e

xte

nded t

o A

OD

.

6ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


BO

FD

YN

: D

ynam

ic e

nd-p

oin

t contr

ol in

BO

F t

hro

ugh a

fast

and

sim

ult

aneous

dete

rmin

ati

on o

f th

e s

teel/

Sla

g c

om

posi

tion

�N

ew

sam

pling d

evelo

pm

ent:

7ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


BO

FD

YN

: D

ynam

ic e

nd-p

oin

t contr

ol in

BO

F t

hro

ugh a

fast

and

sim

ult

aneous

dete

rmin

ati

on o

f th

e s

teel/

Sla

g c

om

posi

tion

�N

ew

sam

pling d

evelo

pm

ent:

�M

ain

resu

lts

:

�Sam

pling o

f m

ixed s

teel-

slag w

as

eff

icie

nt.

�O

nly

part

of

the s

am

ple

s pre

sente

d g

ood c

hara

cte

rist

ics

for

the lase

r

analy

sis

(good f

latn

ess

, su

ffic

ient

thic

kness

, and n

o “

cru

mbly

” p

ropert

ies)

�sa

mple

pre

para

tion is

necess

ary

, pro

bably

by c

utt

ing o

r m

illing t

he

sam

ple

to g

et

a r

easo

nably

fla

t, c

lean s

urf

ace.

8ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


BO

FD

YN

: D

ynam

ic e

nd-p

oin

t contr

ol in

BO

F t

hro

ugh a

fast

and

sim

ult

aneous

dete

rmin

ati

on o

f th

e s

teel/

Sla

g c

om

posi

tion

�Sam

ple

s analy

sis:

�M

ain

resu

lts

:

�W

hile t

he s

teel sa

mple

s w

ere

perf

ectl

y a

naly

sable

, th

e m

ixed s

am

ple

s

were

made o

f st

eel w

ith s

mall s

lag inclu

sions

or

of

slag w

ith s

teel are

as.

�In

ord

er

to g

et

a g

ood s

teel analy

sis,

a “

pre

burn

” a

nd a

lin

e-

or

step s

can

over

at

least

5 m

m is

necess

ary

in o

rder

to identi

fy “

cle

an s

teel”

are

as.

9ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


BO

FD

YN

: D

ynam

ic e

nd-p

oin

t contr

ol in

BO

F t

hro

ugh a

fast

and

sim

ult

aneous

dete

rmin

ati

on o

f th

e s

teel/

Sla

g c

om

posi

tion

�Sla

gs

sam

ple

s analy

sis

Main

resu

lts

:

�Sm

all s

teel part

icle

s in

clu

ded in s

lag p

art

of

the s

am

ple

have a

seri

ous

impact

on t

he r

epre

senta

tiveness

of

the s

am

ple

analy

ses.

�Eff

ect

of

the s

am

ple

surf

ace:

have t

o s

urf

ace t

he s

am

ple

s or

to t

reat

the

analy

tical data

.

�D

iffi

cult

ies

to a

naly

se q

uanti

tati

vely

sla

g a

nd s

teel

on a

sam

e p

rogra

m.

The s

lag r

efe

rence m

ate

rials

cannot

be a

naly

sed w

ith t

he s

am

e lase

r

energ

y a

nd f

ocuss

ing a

s th

e s

teel,

and it

is t

echnic

ally im

poss

ible

to

swit

ch lase

r para

mete

rs in t

he m

iddle

of

a m

easu

rem

ent

run.

�The b

est

chances

to a

chie

ve b

oth

ste

el and s

lag a

naly

sis

in o

ne s

am

ple

is

for

sam

ple

s th

at

are

main

ly s

teel,

wit

h r

ela

tively

larg

e (

0,1

–1 m

m)

slag

part

icle

s em

bedded.

The s

lag a

naly

sis

is t

hen p

oss

ible

wit

h a

“su

btr

acti

on” m

eth

od b

ut

a d

irect

analy

sis

of

“pure

” s

lag p

art

icle

s w

ith

LIB

S is

not

realist

ic.

10

ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


BO

FD

YN

: D

ynam

ic e

nd-p

oin

t contr

ol in

BO

F t

hro

ugh a

fast

and

sim

ult

aneous

dete

rmin

ati

on o

f th

e s

teel/

Sla

g c

om

posi

tion

�M

ain

resu

lts

:

�Analy

sis

on indust

rial

sam

ple

for

the m

ajo

r “sl

ag” e

lem

ents

(Ca,

Si and A

l)

were

fair

ly c

onsi

stent

wit

h R

SD

. Als

o,

the r

esu

lts

for

P a

re f

air

ly

consi

stent.

For

Mn,

S a

nd T

i, n

o r

eal dete

rmin

ati

ons

can b

e m

ade,

but

“a

good indic

ati

on o

f th

e level”

. O

bvio

usl

y,

carb

on in t

he s

lag c

annot

be

dete

rmin

ed a

t all.

11

ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


INQ

UIS

SS:

In s

itu,

quic

k s

ensi

ng s

yst

em

for

measu

rem

ents

of

pro

cess

-cri

tical com

ponents

in s

teelm

akin

g s

lags

�W

ork

ing p

eri

od:

01/07/2001 –

30/06/2004

�Conso

rtiu

m :

RW

TH

(D

), A

cera

lia

(S),

Aceri

nox

(S),

Hellin

iki

Haly

vourg

ia(G

), ISQ

(P),

Univ

ers

ity o

f M

ala

ga (

S),

Univ

ers

ity o

f Patr

as

(G)

�O

bje

cti

ves

:

�Adapta

tion a

nd o

pti

mis

ati

on o

f la

ser-

base

d s

ensi

ng (

LIB

S)

in s

teelm

akin

g

pla

nt

pro

cess

ing c

ondit

ions

(EAF,

BO

F,

ladle

).

�D

evelo

pm

ent

of

a q

uic

k/on-l

ine,

in-s

itu m

easu

rem

ent

syst

em

of

pro

cess

-

cri

tical

com

ponents

of

molt

en s

lags.

�M

ain

resu

lts

:

�LIB

S m

easu

rem

ents

were

perf

orm

ed o

ff-l

ine o

n s

am

ple

d s

lag a

t EAF p

lant.

�O

n-l

ine t

rials

at

BO

F p

lant

haven't b

een d

one d

ue t

o p

racti

cal pro

ble

ms.

12

ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


INQ

UIS

SS:

In s

itu,

quic

k s

ensi

ng s

yst

em

for

measu

rem

ents

of

pro

cess

-cri

tical com

ponents

in s

teelm

akin

g s

lags

�Lab-s

cale

experi

ments

�M

ain

resu

lts:

�The lase

r in

duced b

reakdow

n s

pectr

osc

opy (

LIB

S)

meth

od h

as

been

applied t

o m

eta

llurg

ical

liquid

and s

olid s

lags.

�For

Ca,

Al,

Si,

Mg,

Fe a

nd C

r calibra

tion c

urv

es

were

pro

duced;

Ca

is t

he

most

cri

tical

ele

ment

due t

o s

trong s

elf

-abso

rpti

on a

t th

e p

lasm

a

locati

on.

13

ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


INQ

UIS

SS:

In s

itu,

quic

k s

ensi

ng s

yst

em

for

measu

rem

ents

of

pro

cess

-cri

tical com

ponents

in s

teelm

akin

g s

lags

�Lab-s

cale

experi

ments

–fo

cusi

ng iss

ue

�M

ain

resu

lts:

�Pro

ble

ms

of

focuss

ing t

he lase

r beam

to a

wavy s

lag s

urf

ace h

ave b

een

overc

om

e b

y n

ew

subm

erg

ed g

raphit

e n

ozzle

into

the liq

uid

sla

g.

14

ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


INQ

UIS

SS:

In s

itu,

quic

k s

ensi

ng s

yst

em

for

measu

rem

ents

of

pro

cess

-cri

tical com

ponents

in s

teelm

akin

g s

lags

�Lab-s

cale

experi

ments

–im

pact

of

T

�M

ain

resu

lts:

�Str

ong infl

uence o

f te

mpera

ture

: th

e e

xact

know

ledge o

f sl

ag

tem

pera

ture

and o

f ro

ughly

defi

ned f

low

behavio

ur

of

the s

lag (

vis

cosi

ty)

are

necess

ary

.

15

ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


INQ

UIS

SS:

In s

itu,

quic

k s

ensi

ng s

yst

em

for

measu

rem

ents

of

pro

cess

-cri

tical com

ponents

in s

teelm

akin

g s

lags

�O

ff-l

ine t

rials

at

EAF p

lant

16

ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


INQ

UIS

SS:

In s

itu,

quic

k s

ensi

ng s

yst

em

for

measu

rem

ents

of

pro

cess

-cri

tical com

ponents

in s

teelm

akin

g s

lags

�O

ff-l

ine t

rials

at

EAF p

lant:

�It

was

poss

ible

to m

easu

re m

ain

chem

ical ele

ments

of

steel pla

nt

slags

like C

a,

Si,

Fe,

Mg,

and C

r in

the r

ough e

nvir

onm

ent

of

an

EAF p

roducti

on f

acilit

ies.

�Sla

g s

am

ple

s w

ere

solidif

ied in s

pecia

l Cu c

rucib

les

and

subse

quentl

y a

naly

sed b

y L

IBS b

eneath

the f

urn

ace.

The

inhom

ogeneous

concentr

ati

on f

rom

solidif

icati

on p

ath

ways

and

the u

neven s

urf

ace o

f th

e s

olidif

ied s

lags

led t

o s

trong p

roble

ms

of

LIB

S a

pplicati

on s

o t

hat

only

qualita

tive r

esu

lts

can b

e g

iven.

17

ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


INQ

UIS

SS:

In s

itu,

quic

k s

ensi

ng s

yst

em

for

measu

rem

ents

of

pro

cess

-cri

tical com

ponents

in s

teelm

akin

g s

lags

�Pre

para

tion o

f on-l

ine t

rials

at

BO

F p

lant

�M

ain

resu

lts:

�M

ain

pro

ble

m f

or

the t

ime b

ein

g is

the d

ust

y a

tmosp

here

in t

he c

onvert

er

vess

el

duri

ng b

low

ing a

nd t

he long d

ista

nce b

etw

een lens

and s

lag s

urf

ace

where

dust

dis

turb

s th

e b

eam

s heavily.

�Second p

roble

m w

hic

h h

as

to b

e o

verc

om

e i

s th

e p

rote

cti

on o

f em

plo

yees

again

st m

ain

lase

r beam

s and u

nw

ante

d r

efl

exio

ns

in t

he p

lant.

18

ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


INQ

UIS

SS:

In s

itu,

quic

k s

ensi

ng s

yst

em

for

measu

rem

ents

of

pro

cess

-cri

tical com

ponents

in s

teelm

akin

g s

lags

�M

ain

resu

lts:

�The L

IBS-m

eth

od c

an b

e u

sed in s

teelm

akin

g p

lants

to c

ontr

ol

the s

lag

com

posi

tion o

nline in s

pit

e o

f th

e r

ough e

nvir

onm

ent.

�The s

yst

em

could

be u

sed in p

rocess

ste

ps

like c

onti

nuousl

y m

elt

ing o

f

DRI,

contr

ol

of

foam

ing s

lag in a

n E

AF,

meta

llurg

ical

work

in a

vacuum

tank,

where

a h

om

ogeneous

liquid

sla

g o

f lo

w v

iscosi

ty e

xis

ts.

�In

vest

igati

on o

f dis

cre

te t

aken s

lag s

am

ple

s dir

ectl

y n

ear

by t

he f

urn

ace

in t

erm

s of

rapid

pro

cess

contr

ol

is a

lso p

oss

ible

.

19

ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


Sum

mary

�Term

inate

d R

FCS p

roje

cts

�AVAS (

dir

ect

measu

rem

ent

-O

ES)

�BO

FD

YN

(sa

mpling a

t convert

er)

�IN

QU

ISS (

dir

ect

measu

rem

ent

-LIB

S)

�O

ther

refe

rences

�O

ES m

easu

rem

ent

at

EAF

�O

ES m

easu

rem

ents

at

convert

er

�LIB

S d

irect

measu

rem

ents

of

slag c

om

posi

tion

�O

n-g

oin

g R

FCS a

cti

vit

ies

�O

SCAN

EAF (

dir

ect

measu

rem

ent

-O

ES)

20

ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


EAF s

pectr

a a

naly

sis

–la

b t

rials

�Lot

of

work

fro

m F

inla

nd t

eam

(U

niv

of

Oulu

and H

els

inki)

�Labora

tory

scale

DC e

lectr

ic a

rc f

urn

ace t

o s

tudy t

he u

sabilit

y

of

opti

cal em

issi

on s

pectr

osc

opy in r

eal

ele

ctr

ic a

rc f

urn

aces.

�To

pic

is

EAF s

tain

less

ste

elm

akin

g (�

few

er

slag f

oam

ing).

�O

pti

cal em

issi

on s

pectr

a o

f Fe,

Cr,

Cr 2

O3,

Ni,

SiO

2,

Al 2

O3,

CaO

,

and M

gO

were

record

ed in t

he w

avele

ngth

range 2

50–6

00 n

m

and t

he r

esu

lts

were

analy

sed w

ith t

he h

elp

of

refe

rence d

ata

.

�Benefi

t of

usi

ng a

rc e

mis

sion is

that

no a

ddit

ional ra

dia

tion

sourc

es

are

needed a

nd e

mis

sion c

om

es

dir

ectl

y f

rom

the c

ore

of

the f

urn

ace w

ithout

separa

te s

am

ple

handling.

�G

ood c

orr

ela

tion o

f em

issi

on p

eaks

wit

h C

rO/FeO

and M

nO

/SiO

2

rati

os �

Cr

and M

nyie

ld.

�M

. Aula

, A.

Mäkin

en,

T. F

abri

tius:

“Analy

sis

of

Arc

Em

issi

on S

pectr

a o

f Sta

inle

ss S

teel Ele

ctr

ic A

rc F

urn

ace

Sla

g A

ffecte

d b

y F

luctu

ati

ng A

rc V

olt

age”. Applied S

pectr

osc

opy.

2013.

68:

26–3

2.

�A.

Mäkin

en,

J.

Nis

kanen,

H.

Tik

kala

, H

. Akse

la:

‘‘O

pti

cal Em

issi

on f

rom

a S

mall S

cale

Model Ele

ctr

ic A

rc

Furn

ace in 2

50-6

00 n

m R

egio

n.”

Revie

w o

f Scie

nti

fic Inst

rum

ents

. 2013.

84:

043111

21

ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


EAF s

pectr

a a

naly

sis

–la

b t

rials

�Collabora

tion o

f U

niv

of

Oulu

and R

WTH

�Tr

ials

perf

orm

ed o

n R

WTH

’s p

ilot

EAF in A

C m

ode.

�To

pic

is

EAF s

tain

less

ste

elm

akin

g.

�Cr 2

O3

conte

nt

of

slag w

as

analy

sed b

y m

easu

ring t

he

opti

cal em

issi

on s

pectr

um

of

the e

lectr

ic a

rc a

nd

com

pare

d w

ith X

RF a

naly

sis

of

sam

ple

s.

�The r

esu

lts

indic

ate

that

best

accura

cy in a

pilot

scale

can b

e o

bta

ined b

y u

sing c

om

bin

ati

on o

f Ca

I, F

e I o

r M

n

I lines

as

refe

rence f

or

Cr

I lines.

�Avera

ge a

bso

lute

err

or

of

0.6

2%-p

oin

ts a

nd a

sta

ndard

devia

tion o

f 0.4

9%-p

oin

ts

�Accura

cy o

f m

easu

rem

ent

lim

ited b

y v

ari

ati

on o

f

refe

rence m

ate

rial

am

ount,

vapori

zati

on a

nd t

herm

al

stabilit

y o

f sl

ag c

om

ponent

and s

lag h

om

ogeneit

y.

�M

. Aula

, T.

Dem

us,

H.

Pfe

ifer,

T.

Fabri

tius:

”Analy

sis

of

Cr2

O3 c

onte

nt

of

the s

lag in p

ilot

scale

EAF b

y

measu

ring t

he o

pti

cal em

issi

on s

pectr

um

of

the e

lectr

ic a

rc.”

ISIJ

Inte

rnati

onal.

2017.

57(3

): 4

78-4

86.

22

ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


EAF s

pectr

a a

naly

sis

–pla

nt

tria

ls

�Sti

ll F

inla

nd t

eam

wit

h indust

rial applicati

on a

t O

uto

kum

pu

Sta

inle

ss s

teel pla

nt

�140t

AC s

tain

less

ste

elm

akin

g E

AF.

�H

igh inte

nsi

ty p

eaks

of

Ca

I, C

aII,

Cr

I, M

g I,

Mn

I, N

a I,

Li I w

ere

obse

rved in t

he

spectr

um

.

�The c

om

pari

son s

how

s th

at

the o

pti

c

em

issi

on o

f an a

rc is

dom

inate

d b

y s

lag

com

ponents

.

�Resu

lts

dif

fer

from

lab t

rials

due t

o d

iffe

rent

atm

osp

here

.

23

ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


EAF s

pectr

a a

naly

sis

–pla

nt

tria

ls

�Sti

ll F

inla

nd t

eam

wit

h indust

rial applicati

on a

t O

uto

kum

pu

Sta

inle

ss s

teel pla

nt

�140t

AC s

tain

less

ste

elm

akin

g E

AF.

�Four

basi

c t

ypes

of

em

issi

on s

pectr

a w

ere

obta

ined d

uri

ng t

he E

AF p

rocess

cycle

.

�The f

irst

one is

obsc

ure

d b

y s

cra

p s

teel

�The s

econd is

dom

inate

d b

y t

herm

al ra

dia

tion

of

the s

lag (

too low

T t

o e

xcit

e a

tom

ic/io

nic

transi

tion)

�th

e t

hir

d is

dom

inate

d b

y a

lkali p

eaks

and

sodiu

m D

-lin

es

�th

e f

ourt

h is

chara

cte

rize

d b

y m

ult

iple

ato

mic

em

issi

on p

eaks.

�Stu

dy f

ocus

on s

pectr

um

types

rela

ted t

o

the t

herm

al ra

dia

tion o

f hot

slag o

r gas

and

excit

ati

on o

f alk

ali m

eta

ls b

y t

he

exoth

erm

ic r

eacti

ons

insi

de t

he E

AF.

�M

. Aula

, A.

Mäkin

en,

T. F

abri

tius:

“Analy

sis

of

Arc

Em

issi

on S

pectr

a o

f Sta

inle

ss S

teel Ele

ctr

ic A

rc F

urn

ace

Sla

g A

ffecte

d b

y F

luctu

ati

ng A

rc V

olt

age”. Applied S

pectr

osc

opy.

2013.

68:

26–3

2.

�A.

Mäkin

en,

J.

Nis

kanen,

H.

Tik

kala

, H

. Akse

la:

‘‘O

pti

cal Em

issi

on f

rom

a S

mall S

cale

Model Ele

ctr

ic A

rc

Furn

ace in 2

50-6

00 n

m R

egio

n.”

Revie

w o

f Scie

nti

fic Inst

rum

ents

. 2013.

84:

043111

�O

. Blo

ck:

Dis

sert

ati

on,

Univ

ers

ity o

f th

e F

edera

l Arm

ed F

orc

es

Ham

burg

, H

am

burg

, 1995.

24

ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


Opti

cal

spectr

osc

opy a

t convert

er

–pla

nt

tria

ls

�W

ork

fro

m S

wedis

h a

nd J

apanese

team

s

�To

pic

is

convert

er

(CLU

) but

larg

ely

exte

ndable

to A

OD

.

�Stu

dy o

f th

e s

pectr

um

em

itte

d f

rom

the f

lam

e a

bove t

he m

outh

of

convert

er.

�Poss

ible

to identi

fy s

pectr

al fe

atu

res

of

inte

rest

for

pro

cess

contr

ol (M

nO

)

�W

. W

endt,

W.

Pers

son:

‘‘O

pti

cal Spectr

osc

opy f

or

the C

hara

cte

riza

tion o

f an A

lloy S

teel Convert

ing

Pro

cess

’’.

Appl.

Spectr

osc

.1990.

44(6

): 9

87-9

91 .

�K.

Chib

a, A.

Ono,

M.

Saeki,

M.

Yam

auchi,

M.

Kanam

oto

, T.

Ohno:

‘‘D

evelo

pm

ent

of

Dir

ect

Analy

sis

Meth

od

for

Molt

en Iro

n in C

onvert

er:

Hots

pot

Radia

tion S

pectr

om

etr

y’’

. Ir

onm

akin

gand S

teelm

akin

g 1

993.

20(3

):

215-2

20.

25

ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


Sla

gs

analy

sis

wit

h L

IBS

�LIB

S p

rincip

le:

�la

ser

beam

is

focuse

d into

a s

mall a

rea,

pro

ducin

g t

he h

ot

pla

sma.

The m

ate

rial

conta

ined in t

he p

lasm

a is

ato

miz

ed a

nd t

he lig

ht

corr

esp

ondin

g t

o a

uniq

ue w

avele

ngth

of

each e

lem

ent

is e

mit

ted f

rom

the e

xcit

ed a

tom

s.

�A c

alibra

tion o

f th

e L

IBS s

ignal is

necess

ary

for

quanti

tati

ve a

naly

sis.

�Em

issi

on s

ignals

are

dete

cte

d b

y t

he c

om

bin

ati

on o

f a s

pectr

om

ete

r, a

n ICCD

cam

era

and a

uxilia

ry e

quip

ment.

Accord

ing t

o t

he m

easu

red m

ate

rials

of

solid,

liquid

and g

as

phase

s, d

iffe

rent

measu

rem

ent

cham

bers

or

pla

tform

s can b

e e

mplo

yed.

�M

ult

i-ele

menta

l capabilit

y w

ith v

ery

short

resp

onse

tim

e.

26

ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


Sla

gs

analy

sis

wit

h L

IBS

�O

nline s

lag a

naly

sis

on B

F r

unner

�The r

esu

lts

have p

roved t

he p

oss

ibilit

ies

of

the L

IBS m

eth

od t

o a

llow

accura

te m

easu

rem

ents

in h

ars

h e

nvir

onm

ent.

�Ele

ments

im

port

ant

for

the p

rocess

, like C

a,

Si,

Al,

Mg,

Fe,

could

be

identi

fied o

n-l

ine in t

he s

lag r

unner.

�G

. M

onfo

rt,

L.

Bellavia

, M

. Tonte

ling,

C.

Oje

da,

O.

Anss

eau,

On-l

ine m

easu

rem

ent

of

the h

ot

meta

l te

mpera

ture

and c

om

posi

tion in t

he b

last

furn

ace r

unners

by L

IBS,

JALS v

ol.

1,

Num

. 1,

2014

27

ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


Sla

gs

analy

sis

wit

h L

IBS

�Analy

sis

of

solidif

ied s

am

ple

s ta

ken f

rom

the liq

uid

sla

g layer

in a

vacuum

degass

er

stati

on o

f

a s

teel pla

nt

�V.

Stu

rm,

H.-

U.

Schm

itz,

T.

Reute

r, R

. Fle

ige a

nd R

. N

oll:

Spect

roch

im. A

cta,

Part

B,

63 (

2008),

1167.

�O

n-l

ine a

naly

sis

of

liquid

sla

g a

t VA s

teel pla

nt.

The s

lag in t

he ladle

of

a s

lag t

ransp

ort

er

was

measu

red a

uto

mati

cally a

t a d

ista

nce o

f se

vera

l m

ete

rs d

uri

ng a

short

sto

p o

f th

e

transp

ort

er

wit

hin

2 m

in.

The m

ajo

r com

ponents

, su

ch a

s CaO

, Fe,

SiO

2,

MgO

, M

nand A

l 2O

3,

were

analy

sed a

nd c

om

pare

d w

ith r

efe

rence v

alu

es

from

the labora

tory

for

solid p

ress

ed

slag s

am

ple

s as

well a

s fo

r sa

mple

s fr

om

the liq

uid

sla

g.

Sta

ble

24/7 o

pera

tion d

uri

ng t

he

firs

t th

ree-m

onth

test

run h

as

been d

em

onst

rate

d s

uccess

fully u

nder

these

condit

ions.

�V.

Stu

rm,

R.

Fle

ige,

M.

de K

ante

r, R

. Leit

ner, K

. Pilz,

D.

Fis

cher,

G.

Hubm

er

and R

. N

oll:

Anal.

Chem

.,

86 (

2014),

9687.

28

ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


Sla

gs

analy

sis

wit

h L

IBS

�Analy

sis

of

solidif

ied s

am

ple

s ta

ken f

rom

the liq

uid

sla

g layer

in a

vacuum

degass

er

stati

on o

f

a s

teel pla

nt

�V.

Stu

rm,

H.-

U.

Schm

itz,

T.

Reute

r, R

. Fle

ige a

nd R

. N

oll:

Spect

roch

im. A

cta,

Part

B,

63 (

2008),

1167.

�O

n-l

ine a

naly

sis

of

liquid

sla

g a

t VA s

teel pla

nt.

The s

lag in t

he ladle

of

a s

lag t

ransp

ort

er

was

measu

red a

uto

mati

cally a

t a d

ista

nce o

f se

vera

l m

ete

rs d

uri

ng a

short

sto

p o

f th

e

transp

ort

er

wit

hin

2 m

in.

The m

ajo

r com

ponents

, su

ch a

s CaO

, Fe,

SiO

2,

MgO

, M

nand A

l 2O

3,

were

analy

sed a

nd c

om

pare

d w

ith r

efe

rence v

alu

es

from

the labora

tory

for

solid p

ress

ed

slag s

am

ple

s as

well a

s fo

r sa

mple

s fr

om

the liq

uid

sla

g.

Sta

ble

24/7 o

pera

tion d

uri

ng t

he

firs

t th

ree-m

onth

test

run h

as

been d

em

onst

rate

d s

uccess

fully u

nder

these

condit

ions.

�V.

Stu

rm,

R.

Fle

ige,

M.

de K

ante

r, R

. Leit

ner, K

. Pilz,

D.

Fis

cher,

G.

Hubm

er

and R

. N

oll:

Anal.

Chem

.,

86 (

2014),

9687.

�Q

ualita

tive a

nd q

uanti

tati

ve m

easu

rem

ent

of

ele

menta

l concentr

ati

on in iro

n s

lag a

nd o

pen

pit

ore

sam

ple

s. V

ari

ous

ele

ments

of

Cd,

Ca,

Mg,

Cr,

Mn,

Ti,

Ba,

P, C

u,

Fe,

Zn,

etc

. in

these

sam

ple

s w

ere

dete

rmin

ed.

The c

oncentr

ati

ons

of

trace m

eta

ls e

stim

ate

d w

ith t

he L

IBS s

etu

p

were

in c

lose

agre

em

ent

wit

h t

he r

esu

lts

achie

ved w

ith ICPA

ES.

The L

IBS d

ete

cti

on lim

its

were

est

imate

d f

or

these

menti

oned e

lem

ents

under

the o

pti

mal experi

menta

l condit

ions.

�T.

Huss

ain

and M

. A.

Gondal:

J.

Phys.

: Conf.

Ser.

, 439 (

2013),

012050-1

.

�Z.

WanG

, y.

Deguchi,

F.

Shio

u,

J.

Yan,

J.

Liu

: “Applicati

on o

f Lase

r-In

duced B

reakdow

n

Spectr

osc

opy t

o R

eal-

Tim

e E

lem

enta

l M

onit

ori

ng o

f Ir

on a

nd S

teel M

akin

g P

rocess

es”

. IS

IJ

Inte

rnati

onal.

2016.

56(5

): 7

23-7

35.

29

ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


Sum

mary

�Term

inate

d R

FCS p

roje

cts

�AVAS (

dir

ect

measu

rem

ent

-O

ES)

�BO

FD

YN

(sa

mpling a

t convert

er)

�IN

QU

ISS (

dir

ect

measu

rem

ent

-LIB

S)

�O

ther

refe

rences

�O

ES m

easu

rem

ent

at

EAF

�O

ES m

easu

rem

ents

at

convert

er

�LIB

S d

irect

measu

rem

ents

of

slag c

om

posi

tion

�O

n-g

oin

g R

FCS a

cti

vit

ies

�O

SCAN

EAF (

dir

ect

measu

rem

ent

-O

ES)

30

ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


OSCAN

EAF:

On-l

ine s

lag c

om

posi

tion a

naly

sis

for

ele

ctr

ic a

rc

furn

aces

�W

ork

ing p

eri

od:

01/09/2016 –

31/08/2019

�Conso

rtiu

m :

RW

TH

, O

ulu

, KTH

, Lux M

et,

Oso

y,

Dew

�O

bje

cti

ves

: The o

bje

cti

ve o

f th

e p

roje

ct

is t

he d

evelo

pm

ent

of

a

conti

nuous

measu

rem

ent

syst

em

for

EAF/LF s

lag c

om

ponent

analy

sis

base

d o

n o

pti

cal em

issi

on s

pectr

osc

opy.

The a

im is

the a

naly

sis

of

Cr 2

O3,

MnO

, FexO

y,

CaO

, SiO

2,

Al 2

O3,

MgO

and C

aF

conte

nt

of

the s

lag

for

stain

less

and c

arb

on s

teel gra

des

in t

he E

AF a

nd L

F.

Pro

ject

acti

vit

ies

aim

at:

�re

mote

and c

onti

nuous

measu

rem

ent

syst

em

for

online s

lag a

naly

sis,

�lo

w m

ain

tenance s

yst

em

desi

gn,

�opti

mis

ed o

pera

ting p

racti

ces

base

d o

n c

onti

nuous

slag c

om

posi

tion d

ata

incre

asi

ng r

eso

urc

e

and e

nerg

y e

ffic

iency.

31

ESTAD

2017 –

Dis

sTec

sem

inar

on M

easu

rem

ent

technolo

gie

s in

2dary

meta

llurg

y -

Vie

nna

Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y


Fast

analy

sis

of

slag c

hem

istr

y d

uri

ng s

econdary

meta

llurg

y

fast analysis of slag chemistry during secondary … · 2 estad 2017 – disstec seminar on...

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