Tuyere level coke characteristics in blast furnace with pulverized coal injection

被引:43
作者
Chung, JK
Hur, NS
机构
[1] Technical Research Laboratories, POSCO, Kwangyang, Cheonnam 544-090
[2] Ironmaking Department, Kwangyang Works, POSCO
关键词
pulverized coal injection; coke degradation; permeability resistance index; coke sampling; alkali in coke ash; retention time; prediction of coke mean diameter; co-axial lance; raceway; bird's nest; deadman;
D O I
10.2355/isijinternational.37.119
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
Coke in the blast furnace experiences great changes in their properties during the blast furnace operation. Pulverized coal injection (PCI) into the blast furnace through tuyeres together with oxygen enrichment affects coke properties and blast furnace operation. Using coke sampler at tuyere level, coke samples were collected and analysed at various coal injection rates in the both conventional and co-axial oxygen enrichment. With the help of information obtained from coke sampling results, it is known that alkali affects the coke properties, CSR' and CRR', in bird's nest and deadman but, in bosh and raceway, DI' of the coke is varied with the operation conditions. Also, it is found that gas permeability resistance index in lower part of blast furnace (LK) and mean size of coke at tuyere level were predicted and matched well with the measurements.
引用
收藏
页码:119 / 125
页数:7
相关论文
共 13 条
[1]  
ATKINSON CJ, 1991, 2 EIC GLASGOW, P395
[2]  
CHUNG JK, 1995, IRONMAKING C P ISS, V54, P13
[3]  
ERGUN S, 1952, CHEM ENG PROG, V48, P89
[4]  
HAN JW, 1994, J KOREAN I MET MAT, V32, P204
[5]  
Hatano M., 1979, TETSU TO HAGANE, V65, P1509
[6]   ESTIMATION OF VOID FRACTION AND SHAPE FACTOR IN MOVING BED OF SINTER AND COKE [J].
ICHIDA, M ;
ISOZAKI, Y ;
TAMURA, K .
TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, 1991, 77 (10) :1561-1568
[7]  
NAKAJIMA R, 1990, NKK TECH REV, P7
[8]  
NISHI T, 1980, TETSU TO HAGANE, V66, P1825
[9]  
OSHNOCK TW, 1994, ISS LECT NOTES CHICA, P123
[10]  
PETERS KH, 1991, 2 EIC GLASGOW, P250