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Hcvin thchin: TrnThanh T

Ngihngdn : TS.NguynH

TRNG I HC BCH KHOA H N

VIN KHOA HC V K THUT VT LI

LUN VN CAO HC

Thcskhoa hcKthutvtliu

H Ni, 04/2014


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Student : Tran Thanh T

Supervisor : Nguyen Hoan

HANOI UNIVERSITY OF SCIENCE AND TECHN

SCHOOL OF MATERIALS SCIENCE AND TECHN

Master thesis

Master of ScienceMaterials Engineering

Hanoi, April 25, 2014


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NI DUNG

PhnI

Tngquancng ngh

luynkim phicc

PhnIICslthuyt

PhnIII

Tham khocc nghin cu

khc

PhnIVThcnghin& Ktqu


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nhngha: L cng nghsnxutgang thp khng itheo con ngtruynthngtl cao.Yutnhhng:

1-Ngun d tr than luyn cc.2- Yu cubo v mi trng.

3- Cht lng v gi thnh thp ph.


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Hin nay c khong 30 cng ngh ng dng phng php luyn kXy dng ch yu cc quc gia n , Iran, Mexico, NgaCng ngh luyn kim phi Coke c th chia thnh 2 nhm chnh:Htrc tip vhon nguyn nu chy

Chthonnguyn

Cng

nghNguyn

liuSnphm Lutrnh c

Kh tnhinchuynha

MidrexHYL

QungvinQungcc

- Sthonnguyn trctip(DRI).- Stngbnh nng(HBI)

Thankhng

luynCoke

Fastmet Qungmn

SL/RNQungvinQungcc


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50

55

60

65

70

75

2004 2005 2006 2007 2008 2009 2010 2011 2012

Sn lng DRI/HBI trn th gii t nm 2004-2012

(triu tn)

60%25%

12%

3%

Phn btlsnlngs

Ngun:http

28%

16%

11%8%

7%

30%

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


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Thc trng ti Vit Nam:Nm 1986, Xng st xp-X nghip lin hp Gang thp Tdng vi cng sut 22.000 tn/nm.Nm 1987 cho ra sn pT nm 2005-2006 c quy m cng nghip. Sn phm

cho cc nh my luyn phi s dng l in h quang v lCc nh my s dng cng ngh hon nguyn trc tip c s

Cng ty a im HintrCng ty TNHHNhtPht HiPhng 2006Cng ty Cphnkhong snv luynkim VitNam

(MIREX)Cao Bng 2010

Cng ty c phn Vt t v Thit b ton b (Matexim) Bc Cn 2013

Cng ty TNHH Kobelco VitNam (Tponthp

KobeNhtBn)NghAn Xy d

D n Sn xut st xp t chtthibn Bauxit Ty

guyn (Vin Hn lm Khoa hc v Cng ngh Vit

Ty Nguynang

nghin c


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Dbo xu hngpht trintiVitNam:Xu hng vn s pht trin do:

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

Ngun thp ph khan him v gi c tng cao. Ph ni a khcht lng.

Than ccnhpkhutTrung Quc, Australia gp kh khn vcht lng

p dngcng nghhon nguyn trctiplbcvingnh cng nghipgang thp VitNam.


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1. Nghin cucsl thuytphnnghon nguyn v

nghcqu trnh hon nguyn cavtliuc x2. Xc nh mc hon nguyn ca qung vin bng thcc nhit hon nguyn t 850 n 1050C v sau thnguyn t 15, 50, 45, 60, 90 v 120 pht.

3. Xc nhcc thng s nghcca qu trnh hon ngvin vicc kch thc5; 10; 15mm sdngthan ant

Mc hon nguyn ca qung vin. K-hng s tc phn ng. E-Nng lng hot ha.


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Oxt kim loi (MO) khi phnngvichthon nguyn (R) di iu kin thch hps gii phng ra kim loi (M) v oxt chthon nguyn (RO) nhsau:

MO + R = M + RO

Trong lnhvcgang thp:oMOFe2O3, Fe3O4, FeO.oRCO, H2, CO+H2v C.

Gin El


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Cc giai onhon nguyn oxit st

Hon nguyn oxt st (Fe2O3) bng kh COhocH2xyra qua 3 giai onnhsau:

Phn ng ha hc, hiu ng nhit caphn ng, nnglng t do caphn ng v t lCO/CO2hocH2/H2Otrong kh cbiuthginFe-C-O

1 2 3

2 3 3 4Fe O Fe O e e

GD GD GDF O F

Gin

Gincnbn

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.


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Cchqu trnh hon nguyn

1. Khuch tn ca kh hon nguyn qua lp bin2. Khuch tn kh hon nguyn qua lp l xp3. Khuch tn kh hon nguyn qua lp Fe n lp

FeO4. Phn ng bin pha gia FeO v kh hon nguyn5. Khuch tn sn phm phn ng t lp Fe ra

ngoi6. Khuch tn sn phm phn ng t lp xp ra

ngoi7. Khuch tn sn phm kh ra ngoi lp bin


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ngha Khng ng

Cc lpst, wustit, manhetit v hematitngtm v quan st cr rng

Khng r lp bin phn r hn i vi vng bn nnguyn.

Qungcc c chc vi xp thp. Qung cu vin xp ca

Hon nguyn oxit stbngkh hon nguyn (CO, H2, CO + H2)kimsotbimtsyutnh: kch thcht, xp, thnhph


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Phn ng hon nguyn xy ra theo nhiu giai on. Chng ta ch quan shai kiu hnh thi hon nguyn:a. Hon nguyn ng ha trong cc ht c chc

b. Hon nguyn khng ng ha trong cc ht xp cao. Mcca phn ng s khai trng hp ny.

1 1 3=

Trong : : tphnhon nguyn (hay mchon nguyn) : ttrngqung : ngknh htqungban u t: thigian k: hngstcphnng

ln 1 =

M hnh ngha -phngtrnh Mac Kewan M hnh khng ng


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S. B. Sarkar v cng strong nghin cucamnh chnhnthyqu trnhphnngcahnhpqung-tqu trnh kh ha sinh CO

C + CO2= 2COPhnngny tun theo nghcphnngbcnht. V

qu trnh sl

-ln(1-f) = ktkhngstcphnng

fmchon nguyn

S. B. Sarkar, H. S. Ray, I. Chatterjee, Kinetics of redu

pellets, Journal of Thermal Analysis, Vol. 35 (1989) 2


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Mchon nguyn Biuthth:

Mishra, Barun and Baliarsingh, Sandeep Kumar (2008)Kinetics of Iron Ore Reduction by Coa


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B mn K thut gang thp


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Thitb NguynliuHon

nguyn

Ghinhns

liu


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1. Tinhnh hon nguyn qungv vinbngthan antra

hm lngthan dqu trnh hon nguyn xyra h2. Thu nhnsliugimtrnglngcaqungcuv3. SdngphnmmOriginProxy dngcc thqu

nhcc gi trctrng.4. Sdngcc thitbphn tch: Hinvi intqut (SEM): quan st hnh thibmt

sttrcv sau khi hon nguyn NhiuxX-ray: nhn bit thnh phn pha ca bt qu

sn phm hon nguyn.
http://www.originlab.com/index.aspx?go=Products/OriginProhttp://www.originlab.com/index.aspx?go=Products/OriginPro


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L bunghon nguiukhinnhit

SmchinccSiCv mchiukhinnhit

Lbung

Nhitlnn1200C.Ktniquab

iukhinnhitArduino.

Khnngtngnhitu, vimctng10C/pht


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Thitbv vin

cuha qungti

Ccgmngmu

40*50*60

Cn

30gr/


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Cc thit b dng phn tch

Thitbnhiuxtia X. Knh hinvi pht xtr


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Thnhphnha hcqungstManhetit (%)

Fe SiO2 Al2O3 CaO MgO Mn S

65.99 5.2 0.8 1.15 0.5 0.4 0.21

Qungst

Ngun gc: Qung Manhetit c khai thc ti m qunSn, huyn Bc M, tnh Lng Sn. Qung c tuyn ti nh my tuyn luyn qung st -C

phn u t v khong sn An Thng.


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Qungcuvin 5mm-10

Tinhnh v vin

Qung mn c cu ha ving knh: 5mm, 10mm v15mm.

Sy qung vin ti khong110C~120C trong 1gi.

Nung kt qung vin ti 1200C trong 2 gi


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Thnhphnthan cm 3A, (%)

C A (tro) V (Chtbc) S (

74 10.33 7.48

Chthon nguyn :

S dng than cm 3A (kch thc nh hn 3mm)Ngun gc: Khai thc ti m than antraxit Cm Ph - Qu m trung bnh khong 8.0%Nhit ton phn (nh nht) khong 7350Cal/gram


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Chunbccmuhon

Chun b cc mu

Chun b 6 cc nung mucho mi th nghim kho stng vi 6 mc thi gian 15,30, 45, 60, 90 v 120 pht.

Cn trng lng cc vin

qung dng trong th nghimv ghi vo bng s.

Chun b cc nung theo ccbc nh hnh bn cnh.


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Quy trnh hon nguyn.Nng nhit l 10C/pht n nhit kho st hon nguyn. Ly ln lt cc cc nung theo cc mc thi gian (tnh t khi nhi

kho st) ngui v ly mu. Tin hnh cn khi lng v ghi vo bng s


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Mus Thi gian(pht)

Khilngban u, Po

Khi lng sauhon nguyn, P

g

1 15 P01 P1

2 30 P02 P2

3 45 P03 P3

4 60 P04 P4

5 90 P05 P5

6 120 P06 P6

Bngghi sliuvkhilngmu


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Mc hon nguyn c tnh:

Hm lng -xy trong qungvin(Loi tr cc yu t -xyc trong cc hp cht khc nh SiO2, CaO, MgO trong qung)

Fe3O43Fe + 2O2

C 100g qung s ng vi 65.99 g Fe hay 91.13 g Fe3O4.

2Fe2O34Fe + 3O2


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Vim hnh khng ngha, nghctun theo hm s: ln 1 = (1)

hay ta c: = 1 (2)Trong :

- mchon nguyntthigian hon nguyn

xc nhhngsk, tccbngsliu(, t) lpth-ln(1-) theotrnh 1. Lpthbcnhtiqua gc(0,0) ta thu ckbnghsgc

Xc nhnnglnghotha:

k =

(3)

ta vitli(3) thnh lnk = lnA-

, sau nisuy hmbcnhtlnk ~ 104/T. T

sgcbngE/R tthbcnht.

EnAHKhRhTn


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0 20 40 60 80 100 1200

20

40

60

80

100

850C950C

1050C

Reductiondegree(C)

Time (min)

McHon nguyn Biudinthln(1-f)~

0 20 40 60 80 100 10.0

0.5

1.0

1.5

2.0 850C950C

1050C

-ln(1-f)

Time (min)


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Nhit, C K

850 5.84*10-3

950 14.47*10-3

1050 17.94*10-3

7.0 7.5 8.0 8.5 -5.5

-5.0

-4.5

-4.0

-3.5

lnK

1/T*10^4

=

(Arrhenius equatio

KhngstcphnngENnglnghothaA - HngsArrhenius (Hay Frequency Factor)RHngskh 8.314472 JK-1mol-1

Tnhit(K)

Hngstcphnng

Nnglnghotha


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0 20 40 60 80 100 1200

20

40

60

80

100

850C950C

1050C

Reductiondegree(%)

Time (min)

0 20 40 60 80 100 1200.0

0.5

1.0

1.5

2.0

2.5

-ln(1-f)

Time (mins)

850C

950C

1050C


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7.0 7.5 8.0 8.5

-4.8

-4.5

-4.2

-3.9

lnK

10^4/T

Nhit, C K

850 7.89*10-3

950 15.15*10-3

1050 18.97*10-3

=

(Arrhenius equatio


Tnhit(K)

Hngstcphnng

Nnglnghotha


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0 20 40 60 80 100 1200

20

40

60

80

100

900C950C1000C

1050C

Reductiondegree(%)

Time (Min)

0 20 40 60 80 100 0.0

0.5

1.0

1.5

2.0

2.5

900C950C

1000C

1050C

-ln(1-f)

Time (Min)


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7.0 7.5 8.0 8.5 -4.5

-4.2

-3.9

-3.6

LnK

10^4/T

Nhit, C K

900 12.57*10-3

950 16.32*10-3

1000 19.86*10-3

1050 22.03*10-3

=

(Arrhenius equatio


Tnhit(K)

Hngstcphnng

Nnglnghotha


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Nhit

, C

Hng

5m

850

900 12.5

950 16.3

1000 19.8

105022.0

E = 70.34,

54.7948.8 kJ

nghcqu trnh hon nguynphthuckch thcngknh qungvin

Nhit: 1050C


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Qungstban u Qungvin, nung 120

Huht-xt st d


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Qungvin 15mm, hon nguyn1050C, 15 pht

Qungvin 15mm, ho1050C, 90 ph

Huhtpha kim loic


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Qungvin, nung 1200C, 2h Hon nguyn 15 pht Hon n

Qungvin 15 mmNhithon nguyn: 1050


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tinhnh th nghimhon nguyn viqungvin

15mm trn nnthan. Cc ktquth nghimcho thyTngnhitlm tngmchon nguyn.

Tngthigian ginhitlm tngmchon nguyn. Mnguyn tngnhanh trong 45 pht uv tngrtchmnugian ginhit.

Phn tch thnhphnpha cho thy: 15pht hon nguyn ban u,phnln-xt stl Fe3Occ -xt khc.

Sau 90 pht hon nguyn, trong snphmchcn lipha k

-xt caSi.


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Cc thng snghccaqu trnh hon nguyn, tun theo quy lutbcnht,nhncnhsau

Gi trnnglnghotha tngngivicc qungvin kch thcE = 70.34, 54.79 v 48.8 kJ, chobitqu trnhphnngthucminngMckim loiha caqungvin 15mm sau khi hon nguyn ti1050

pht tngngl: 44.34 v 96.39%.

Nhit, CHngstcphnng, k

Mu 5mm Mu10mm Mu 15mm

850 7.89*10-3 5.84*10-3

900 12.57*10-3

950 16.32*10-3 15.15*10-3 14.47*10-3

100019.86*10-3

1050 22.03*10-3 18.97*10-3 17.94*10-3


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