|
|
|
| SOME ASPECTS IN THE TECHNICAL DEVELOPMENTS OF LD REFRACTORIES IN CHINA |
| Zhong Xiangchong (Chung Heung-sung) Luoyang Institute of Refractory Research |
|
Cite this article:
Zhong Xiangchong (Chung Heung-sung) Luoyang Institute of Refractory Research. SOME ASPECTS IN THE TECHNICAL DEVELOPMENTS OF LD REFRACTORIES IN CHINA. Acta Metall Sin, 1980, 16(2): 231-261.
|
|
|
Abstract During the past two and a half years, lining lives of LD converters in Chinahave markedly increased with everal ampaigns exceeding 2000 heats. The averageLD lining life of the Capital Iron and Steel Company has surpassed 1000 heats.Improving the quality of refractory materials used has played a decisive role inthis increase. It has been proved hat natural dolomite and magnesitic dolomite are suitableraw materials for LD lining; the technical properties of bricks ade from them arequite satisfactory and high lining life can be achieved. A two-stage calcination process has been dopted or the preparation of highpurity dolomite (or magnesitic dolomite) clinker, by which the sintering tempera-ture can be owered 100--200℃. The clinker thus produced possesses uniform com-position and structure as well as improved ydration-resistant and slag-resistant pro-perties. Tar-impregnated burnt brick and tar-impregnated tempered block based n ighpurity clinkers have been developed for zoned lining and considerable increase inLD lining life has been attained. ased on the study of the wear mechanism of LD refractories by slags, it ispostulated that the process consists of ecarburization followed by chemical cor-rosion, which proceeds in two stages-attack by the initial acidic slag and then t-tack by the high ferrous slag at high temperatures. Slag resistance tests have shownthat synthesized magnesitic lomite xhibits superior resistance to both acidic andferrous-bearing slags.
|
|
Received: 18 February 1980
|
[1] Halm, L., J. Brit. Ceram. Soc., 7 (1970) , 42．
[2] Hedley, C. S., Iron Steel, 33 (1960) , 272． |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
