a kinetic study of hot metal desulphurization by calcium carbide

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McMaster University

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9-1-1986

A Kinetic Study of Hot Metal Desulphurization byCalcium Carbide Powder Injection

L K. Chiang

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Recommended CitationChiang, L K., "A Kinetic Study of Hot Metal Desulphurization by Calcium Carbide Powder Injection" (1986). Open AccessDissertations and Theses. Paper 3294.http://digitalcommons.mcmaster.ca/opendissertations/3294
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\.A KIIETIC STUDY OF HOT ttETAL DESULPHURl-ZATIONBY CALCIU" CARBIDE PONDER INJECTION

by(f) L. K. ChIang, B.Sc

A ThesIsSubmItted to the School o f Graduate StudIesIn PartIal FulFI I.lment .oF the RequIrements

For the DegreeDoctor o f PhIlosophy

McMaster UnIversItySeptember, 1986

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ISBN

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0-315-35872_6


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A KINETIC STUDY OF HOT METAL DESULPHURIZATIONBY CALCIUM CARBIDE POWDER INJECTION

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'Doctor or Ph I 10sdphy, (1986) j McMaster Un'iversityHamIlton, Ontario

TITLE: A Kinetic Study of Hot Metal D e ~ w l p h u r l z a t l o n by Calcium Carbide Powder InJection.

,":, .. -,'. '\AUTHOR: L I u-'Kyen Ch lang

B.Sc. National Cheng Kuhg Univers i tyTaiwan,' Republic of China

SUPERVISORS: Proressor G.A. Irons ,and Proressor W -K. Lu\NUMBER OF PAGES: xxx,327

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cur re r i t l y , ' s u lphu r th e most prob lemat icImpuri ty which aFFects th e phys ica l and mechanicalproper t I'es 0.'1" stee I . ThereFore a I I the I ntegra ted s ~ E ! e Iproducers desulphurlze Iron beFore steelmaking. Calciumcarbide Is one o f the reagents used to d e s u l p h u r l z e ~ o t metal from the b la s t furnace, yet the kinet ic react ionphenomena a re not c I ear . The present work was ! n,ft !ated tostudy the k. I n ~ t Ics o f hot meta I desu I phur. Iza t Ion by.calcium carbide powder Injection a t the 3 Tonne scale.

The most Important variables which 'aFFect the rateand eFFiciency o f calcium carbide desulphu':"t.zatlon are thetype o f top s lag , the In ject ion conditions and the oxygenact iv i ty In the hot metal

. The present resu I t s quant Ita t I ve I y demonstratethese eFf'ects.The experimental resul ts Indlcl;lte that controlo f the In i t i a l s'iag condit ion can ef.Fect-ively Improve the ,

, .rate an d ef'FIciency o f calcium carbldedesulphurlzatlon. I twas Found that lower sol id loading Is klnet lcal!y ~ a v o r a b . l e f'or both s I ag/meta I and p (ume desu I phur! za t ! on. Oxygenact iv i ty m e a s u r ~ e n t s show t h a ~ , o x y g e n plays crucial roleIn desu I phur Iza t ,-on, par t I cu 1 ar.1 y to ach I eve ' extra-:'1 owsu Iphur 1eve 1s. i i i

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A'steedy-state . one-dimensional. three-phase modelwas' developed to model the plume d e ~ u l p h u r l z a t l o n ' k l n e t l c s ~ -'--The model permits e quan t l t a t l "e ana lys i s o f th e p,resent"xperimental ' r e ~ u l t s . The computed r esu l t s from th e modelare Found to be conslstent 'wlth, the experimental data.

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a kinetic study of hot metal desulphurization by calcium carbide

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