Động học hoàn nguyên quặng viên Ma-nhê-tít Thăng Long trên nền than

7/22/2019 ng hc hon nguyn qung vin Ma-nh-tt Thng Long trn nn than

1/43

Gio vin hngdn:TS. NguynHong Vit

nghchon nguyn

trn nnthan

H Ni, ngy 10 thng 6 nm20141

Sinh vin thchin:NguynHngHiTrncLong, kha 54 KTVL

qungvin Ma-nh-tt ThngLong


2/43

I. Tngquan

II. Cshon nguyn trctip

III. Hon nguyn qungvin -xt sttrn nnthan

IV. Ktquth nghim

V. Ktlun

Nidung

2


3/43

I. Tngquan

3


4/43

Tngquan

4

A

B

C

Luyncoke

Chunbliu

L cao L thiOxy

Than

Q. stcc, mn

Coke

Thiu ktphm,Q. vin

Thp lng

Hon nguynTrctip

L inhquang

Thp lng

Thp ph

Q. stKh TN/Than

L thiOxyHon nguyn

nng chyQ. stThan

Thp ph

Stxp

Gang lng

Thp lng

Gang lng


5/43

Tng quan (tip)

Chthonnguyn

Cng

nghNguyn

liuSnphm Lutrnh cng ngh

Kh tnhin

chuynha

MidrexHYL

QungvinQungcc

- Sthonnguyn trctip(DRI).- Stngbnh nng

(HBI)

Thankhng

luynCoke

Fastmet Qungmn

SL/RNQungvin

Qungcc

Hin nay c khong 30 cng ngh ng dng phng php luyn kimphi Cc.

Xy dng ch yu cc quc gia n , Iran, Mexico, Nga

Cng ngh luyn kim phi Coke c th chia thnh 2 nhm chnh: Honnguyn trc tip vhon nguyn nu chy


6/43

Tngquan (tip)

50

55

60

65

70

75

Sn lng DRI/HBI trn th giit nm 2004-2012 (triu tn)

60%25%

12% 3%

MIDREX

SL/RN

HYL

Khc

Phn btlsnlngstxpnm2012

Ngun:http://www.steelworld.com

28%

16%11%

8%7%

30%

n

Iran

Rp X t

Mexico

Nga

Khc

70.937
http://www.steelworld.com/http://www.steelworld.com/


7/43

Tngquan (tip)

ThctrngtiVitNam:

Nm1986, Xngstxp-X nghiplin hpGang thp Thi Nguyn xydngvicng sut22.000 tn/nm. Nm1987 cho ra snphmutin.

Tnm2005-2006 c quy m cng nghip. Snphmccung cpcho

cc nh my luynphi sdngl inhquang v l intrung tn. Cc nh my sdngcng nghhon nguyn trctipcsthan.

Cng ty a im Hintrng Cng sutCng ty TNHHNhtPht HiPhng 2006 50,000Cng ty Cphnkhong snv luynkim VitNam

(MIREX)

Cao Bng 2010 100,000

Cng ty c phn Vt t v Thit b ton b (Matexim) BcCn 2013 100,000

Cng ty TNHH Kobelco VitNam (TponthpKobeNhtBn)

NghAn Xy dng 1,000,000

D n Sn xut st xp t chtthibn Bauxit Ty

guyn (Vin Hn lm Khoa hc v Cng ngh VitNamVinacomin) Ty Nguyn

ang

nghin cu


8/43

Tng quan (tip)

Dbo xu hngpht trintiVitNam:

Xu hng vn s pht trin do:

Phn ln cc nh my sn xut phi thp ti Vit Nam s dng l in hquang v l intrung tn.

Ngunthp phkhan himv gi ctngcao. Ph ni a kh kim sot chtlng.

Than ccnhpkhutTrung Quc, Australia gpkh khnvgi cv chtlng

p dngcng nghhon nguyn trctiplbcicnthit

vngnvingnh cng nghipgang thp VitNam.


9/43

II. Cshon nguyn trctip


10/43

Hon nguyn trctip

Cc thstu tin thixa xasnxutStxpbnghonnguyn qung stbng qu trnh t chy than. St xp lnguncung cpchnh ivilnhvcsnxutgang v thptrong nhiuthk.

Khi nim St xp-Sponge iron c s dng n unhngnm1980 cho nkhi ra i thutng chunxc vphbinc tn l sthon nguyn trctip(DRI)

Hon nguyn trc tip (DR) l cng ngh trong st xpcsnxutbngshon nguyn caqungsthocOxytstkhc khng xyra pha lngnhitdiimchycavtliucng vicc chthon nguyn thrn, lnghoc

kh Snphm ca cng ngh DR c gi l st xp (Sponge

iron) hay sthon nguyn trctip(DRI) hocstngbnhnng (HBI). Chng thng c s dng thay th thp phivicng nghluynthp l in.


11/43

Hon nguyn trctip

Trong qu trnh hon nguyn Oxyt stthnh stxphaysthon nguyn trctip(DRI), huhttnglngOxytrong Oxyt stsckhbkhiqungst trngthi rn.

Sn phm ca qu trnh hon nguyn c mc kimloiha cao.

Mckim loiha cnhnghal thnh phnstkim loiFe / tnglngstc trong Oxyt st 100%

DRI c tchc t ong khi nhn di kinh hin vi, dovyngita thnggil stxp(stxprnc nhiulrng)

khbOxy tOxyt st(hay qutrnh hon nguyn), ngita sdngchthon nguyn bngthanhockh thin nhin.

11


12/43

inhnghavstxp(DRI)

Sn phm dng cc xp hay dng bt, thu c th rn trc tip t

qungsthon nguyn bngcacbon thrnhay kh CO, H2, trong l quay

hay l ng, l tng si, v.v., ti nhit khng qu 1100C. Phi dng

qung stgiu (Fe trn 65%) mi thu cst xp cht lng cao (Fe

khng di90%), v tchay (SiO2, Al2O3, vv.) trong qungst lihon

ton trong stxp. T lFe kim loi/Fe tng trong stxpcht lngcao

c th ti90 - 95%. Hm lng luhunh (S) trong stxp thngt

di0,05%. stxpdngcchay dngbnh p cdng chyu

thay thti80% thp phtrong philiul inluynthp.

12


13/43

Nguyn l c bn

Oxt kim loi(MO) khi phnngvichthon nguyn (R) diiu kin thch hpsgii phng ra kim loi (M) v oxt chthon nguyn (RO) nhsau:

MO + R = M + RO

Trong lnhvcgang thp:

o

MOFe2O3, Fe3O4, FeO.oRCO, H2, CO+H2v C.

Gin

Ellingham


14/43

Nguyn l c bn

Cc giai onhon nguyn oxit st

Hon nguyn oxt st (Fe2O3) bng kh COhoc H2xy ra qua 3 giai on nh sau:

Phn ng ha hc, hiu ng nhit ca phnng, nng lng t do ca phn ng v t lCO/CO2hoc H2/H2O trong kh cbiuthginFe-C-O

1 2 3

2 3 3 4Fe O Fe O e e

GD GD GDF O F

Gincn bngFe-C-O

Gincn bngPhnngBoudouard

Shon nguyn caoxit stbngC rnxyra theo 2 bc:

(1) Kh ha cacbon thnh kh CO.C + O2= CO2

CO2+ C = 2CO(2) Hon nguyn oxit stbngkh CO misinh ra.


15/43

C ch hon nguyn

1.Khuch tn ca kh hon nguyn qualp bin

2.Khuch tn kh hon nguyn qua lp lxp

3.Khuch tn kh hon nguyn qua lp Fen lp FeO

4.Phn ng bin pha gia FeO v khhon nguyn

5.Khuch tn sn phm phn ng t lpFe ra ngoi6.Khuch tn sn phm phn ng t lp

xp ra ngoi7.Khuch tn sn phm kh ra ngoi lp

bin


16/43

Phnnghon nguyn:

3Fe2O3+ CO = 2Fe3O4+CO2

Fe3O4+ CO = FeO + CO2

FeO + CO = Fe + CO2

Kh ha Cc-bon

C + O2= 2 CO

Phn giichtbcthanThanC + chtbc

M hnh nghc

PhngtrnhGiai on

nghc

1 ( 1 )

= kt

Ha hc

(1 )= kt Ha hc

1 1

= kt Khuchtn

1 23

f 1 = Khuchtn

k [ 1 2

3f 1

] D / 1 1

= Hnhp

E. DONSKOI, D.L.S. McELWAIN, and L.J. WIBBERLEY, METALLURGICAL AND MATERIALS

TRANSACTIONS B, VOLUME 34B, APRIL 2003255 16

1

2

3

4


17/43

III. Hon nguyn qungvin-xt sttrn nnthan

17


18/43

L bung:o Nhitln n1200C.o iukhinv gim st

nhitArduino.

o Tcnng nhit10C/pht

Chu trnh nng nhit

Thitbth nghim

L bunghon nguynsdngbiukhinnhitArduino

850, 950 v 1050C

18


19/43

Thitbth nghim

Thitbv vinqungti

Ccgmngmu40*50*60

Cn int30gr/0.001gr

19


20/43

QungMa-nh-tt ThngLong

QungstMa-nh-tt csdngl qungstThngCuPh Thccng ty CPhnKhong Snv LuynKim ThngLong khai thc v cung cpcho nh my luyngang Ha Pht

Chunbnguyn liu

Thnhphnha hcqungst(%)

Fe SiO2 Al2O3 CaO MgO Mn S P60.83 12.97 0.26 0.59 0.48 0.16 - 0.03

20


21/43

Chunbnguyn liu(tip)

Than Antraxit

Than antraxit sdngl than cm A3 (kch thc 3mm) ccung cptmthan antraxit QungNinh.

Than ccvn

Than ccvnsdngl than cccsnxuttnh my luyngang thpHa Pht ( kch thc 3mm ) vingunthan mnhptimthan PhnM-Thi Nguyn

C cnh tro, A Chtbc, V Luhunh

80 11.27 6.62 0.6

C cnh tro, A Chtbc, V

75 18.62 1.29


22/43

Chunbnguyn liu(tip)

Thnhphnbentonitetchay

Bentonite ccung cptnh my luyngang thp Ha Pht

sdngv vin qung(2%) nhmtngbncho qungvinnhkhnngktdnh.

Thnh phnha hcbentonitetchay (%)

SiO2 Al2O3 Fe2O3 MgO CaO Na2O K2O TiO2 P2O5 C S

65.9 21.5 4.46 2.82 1.63 2.69 0.56 0.24 0.06 0.51 0.37


23/43

Quy trnh th nghim

Qungmncv vin vingknh 5mm, 10mm,15mm sdng2% bentonite.

Sy qung vin ti 110C trong 3h nhm kh mdnh.

Nung oxy ha qungvin ti1200C trong 2h ng

rnv chuyn100% Fe vdngFe2O3.

Tin hnh cn khi lngmu tinhnh th nghimhon nguyn.


24/43

Chun b cc mu:

6 cc nung mu: ngvi 6 mc thi gian

15, 30, 45, 60, 90 v120 pht.

Xc nhtrng lngcc vin qung.

Chun b cc nung theocc bc nh hnh bn.

Quy trnh th nghim(tip)

Chunbccnung muth nghim

Qungvin

Than

Btsamt

24


25/43

Quy trnh th nghim(tip)

Nng nhittrong l 10Cnnhitkhost.

Lylnltcc ccnungtheo thigian tkhi l tnhitkhost.

nguiv tinhnh cn

khilngv ghi vo bngsliu.


26/43

Mcchcan

Nghin cu c s l thuyt phn ng honnguyn v cc m hnh ng hc qu trnhhon nguyn cavtliuc xpcao.

Xc nhcc thng snghccaqu trnhhon nguyn qungvin vicc kch thc5;10; 15mm sdngthan antraxit. Mchon nguyn caqungvin. K-hngstcphnng. E- Nnglnghotha.

So snh kh nng hon nguyn ca cc loithan.


27/43

IV. Ktquth nghim

27


28/43

Cstnh ton

Mchon nguyn: %Hon nguyn =

100

Hmlng

-xy trongqung

:C

100gqung

ta c 84g Fe3O4.Sau khi cho thm 2%bentonite ve vin, mFe3O4=84 x 0.98=82.32g do khilngoxy l

= 82.32 16 x 4

56 x 3 16 x 4= 22.71

Trong qu trnh nung thiu ti1200C, Fe3O4chuynthnh Fe2O3.Cho rngchc khilng

oxy tngsau khi thiu, Khilngqungvin tngl : = 82.3

16

464= 2.84

Tyta tnh cphntrm-xy trong qungvin sau thiu -xy ha l :

% =.+.

+.= 24.84%


29/43

Ktquth nghim

29

Mchon nguyn qungvin 5mm



30/43

Ktquth nghim(tip)

Xc nhhngsk cho qungvin 5mm

0 20 40 60 80 100 120

0.0

0.2

0.4

0.6

0.8

850oC

950oC

1050oC

1-(1-f)1/3

Thi gian (pht)

0 20 40 60 80 100 120

0

1

2

3

4

5

850oC

950oC

1050oC

-ln(1-f)

Thi gian (pht)

0 20 40 60 80 100 120

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

850oC

950o

C

1050oC

[1-(1-f)1/3]2

Thi gian (pht)

0 20 40 60 80 100 120

0.0

0.1

0.2

0.3

850oC

950oC

1050oC

1-2/3f-(1-f)2/3

Thi gian (pht)

1 2

3 4

Nhnthym hnh (3) l m hnhph hpnhtcho qungvin 5mmviphngtrnh nghcl :

(1 1 )=

yl m hnh ngha htxptheonghckhuchtn.

Tyxc nhchngsk l:

Nhit , C Hng s tc phn

ng, k

850 1.04*10-3

950 2.6*10-3

1050 5.76*10-3


31/43

Ktquth nghim(tip)

31

Muqungvin 10mm

0 20 40 60 80 100 120

0

20

40

60

80

100

850oC

950oC

1050oC

Mchonngu

yn(%)

Thi gian (pht)


0 50 100

0.0

0.1

0.2

0.3

0.4

0.5

850oC

950oC

1050oC

[1-(1-f)1/3]

2

Thi gian (pht)

Biudinth[

]~Kt

Nhit , C Hng s tc phn ng, k

850 0.53*10-3

950 1.75*10-3

1050 4.13*10-3

Hngstcphnngk


32/43

Ktquth nghim(tip)

32

Muqungvin 15mm

Mchon nguyn qungvin 15mm Biudinth[

]~Kt

Nhit , C Hng s tc phn ng, k

850 0.24*10-3

950 1.34*10-3

1050 2.76*10-3

Hngstcphnngk

0 20 40 60 80 100 120

0

20

40

60

80

100

850oC

950oC

1050oC

Mchonngu

yn(%)

Thi gian (pht)

0 20 40 60 80 100 120

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

850oC

950oC

1050oC

[1-(1-f)1/3]2

Thi gian (pht)


33/43

Ktquth nghim(tip)

33

Muqungvin sdngthan ccvnti1050C

Mchon nguyn qungvin sdngthan ccvn Biudinth[

]~Kt

ngknh, mm Hng s tc phn ng, k

15mm 0.69*10-3

10mm 2.26*10-3

5mm 3.83*10-3

Hngstcphnngk

0 20 40 60 80 100 120 140 160

0

20

40

60

80

100

5mm

10mm

15mm

Mchonngu

yn(%)

Thi gian (pht)

0 20 40 60 80 100 120 140 160

0.0

0.2

0.4

0.6

0.8

5mm

10mm

15mm

[1-(1-f)1/3]2

Thi gian (pht)


34/43

Ktquth nghim(tip)

34

Muqungvin sdngthan cm A3 ti1050C

Mchon nguyn qungvin sdngthan cm A3 Biudinth[

]~Kt


15mm 2.76*10-3

10mm 4.13*10-3

5mm 5.76*10-3

Hngstcphnngk

0 20 40 60 80 100 120

0

20

40

60

80

100

5mm

10mm

15mmMchonngu

yn(%)

Thi gian (pht)

0 50 100

0.0

0.2

0.4

0.6

0.8

5mm

10mm

15mm

[1-(1-f)1/3]2

Thi gian (pht)


35/43

Ktquth nghim(tip)

35

Muqungvin sdngthan citi1050C

Mchon nguyn qungvin sdngthan ci Biudinth[

]~Kt


15mm 3.31*10-3

10mm 7.41*10-3

5mm 7.77*10-3

Hngstcphnngk

0 20 40 60 80 100 120

0

20

40

60

80

100

5mm

10mm

15mmMchonnguyn(%)

Thi gian (pht)

0 20 40 60 80 100 120

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

5mm

10mm

15mm

[1-(1-f)1/3]2

Thi gian (pht)


36/43

Ktquth nghim(tip)

Hngstcphnngticc nhitkhc nhau

Xy dngthbiudinphngtrnh xc nhnnglnghotha.

Nhit, CHng s tc phn ng, k

Mu 5mm Mu 10mm Mu 15mm

850 1.04*10-3 0.53*10-3 0.24*10-3950 2.6*10-3 1.75*10-3 1.34*10-3

1050 5.76*10-3 4.13*10-3 2.76*10-3

7.0 7.5 8.0 8.5 9.0

-8.5

-8.0

-7.5

-7.0

-6.5

-6.0

-5.5

-5.0

5mm

10mm

15mm

lnK

10^4/T

Kch thc,mm

Nnglnghotha, kJ

15mm 183.85

10mm 156.48

5mm 134.29


37/43

Ktquth nghim(tip)

Phn tch thnh phnpha

20 30 40 50 60 70 800

50

100

150

200

250

300

Intensity(

a.u.

)

2 Theta (deg.)

Fe3O

4

Fe2O

3

SiO2

20 25 30 35 40 45 50 55 60 65 70 75 800

50

100

150

200

250

300

350

400

450

500

Intensity

(a.u

.)

2 Theta (deg.)

Fe2O

3

SiO2

MuXRD camuqungstban u. MuXRD camucuvin nung Oxy ha 1200C, 2h

Muqungban u(dngbtmn) c chachyul : Fe2O3, Fe3O4v SiO2

Khi nung -xy ha qungv vin ban uti1200C trong 2h ktquphn tch cho thyhu

htFe3O4b-xy ha thnh Fe2O3v SiO2cn likhngbchuynha


38/43

Ktquth nghim(tip)

Phn tch thnh phnpha

MuXRD cacuvin 10mm hon nguyn tinhit950C trong 15 pht

MuXRD cacuvin 10mm hon nguyn tinhit950C trong 90 pht

Sau 15 pht hon nguyn ti950C, qungvinphn tch cho thyphnln-xt chuynthnh

Fe3O

4,FeO v Fe.

Sau 90 pht hon nguyn ti950C cho thyhuhtpha kim loinhnctrong qungcuvin

thnhphml Fe

20 30 40 50 60 70 80

0

50

100

150

200

250

Intensity

(a.u

.)

2 Theta (deg.)

Fe

FeO

SiO2

Fe3O

4

20 30 40 50 60 70 800

100

200

300

400

500

Intensity

(a.u

.)

2 Theta (deg.)

Fe

SiO2


39/43

Ktquth nghim(tip)

Phn tch hm lngst

Phn tch hm lngstcaqungvin 10mm hon nguyn ti950C

Chhon nguyn Hm lngFe, % Mckim loiha, %

Cuvin 10mm, 950C, 15 pht 31.91 46.41

Cuvin 10mm, 950C, 30 pht38.74 54.98

Cuvin 10mm, 950C, 60 pht 61.73 81.05

Cuvin 10mm, 950C, 90 pht 69.24 88.76

(ktqunhnctphngphp phn tch ha hctiPTN C5-211)


40/43

V. Ktlun

40


41/43

Ktlun

Ktquth nghimhon nguyn qungvin 5, 10, 15mm vicc nhitkhost khc nhau trn nnthan cm A3 cho thy:

- Tngnhitlm tngmchon nguyn

- Tngthigian ginhitlm tngmchon nguyn. Mchonnguyn tngnhanh trong 45 pht uv tngchmdnnuko di thigian ginhit.

Ktquth nghimhon nguyn qungvin ti1050C sdngcc loithankhc nhau cho thy:

- Hottnh v chtbccathan cng cao th tchon nguyn cng ln

Phn tch thnhphnpha cho thy: 15pht uphnln-xt l Fe3O4,FeO, Fe v cc -xyt khc. Sau 90 pht, snphmcn lichc pha kim loiFe v -xt Silic


42/43

Ktlun(tip)

Cc thng snghccaqu trnh hon nguyn tun theo cchng

hckhuchtn viphngtrnh (1 1

)~, vihngsknhncnhsau:

Gi trnnglnghotha tngngviqungvin vicc kch thc5, 10, 15mm l 134.29, 156.48, 183.85 kJ chobitqu trnh hon nguynthucminnghc.

Mckim loiha caqungvin 10mm sau khi hon nguyn ti

950C trong 15, 30, 60, 90 pht tngngl: 46.41, 54.98, 81.05, 88.76%

Nhit, C Hng s tc phn ng, k

Mu 5mm Mu 10mm Mu 15mm

850 1.04*10-3 0.53*10-3 0.24*10-3

950 2.6*10-3 1.75*10-3 1.34*10-3

1050 5.76*10-3 4.13*10-3 2.76*10-3


43/43

Documents

Động học hoàn nguyên quặng viên Ma-nhê-tít Thăng Long trên nền than