Reduction in the temperature of blast furnace heat conservation band using carbon material - ore macroscopic composite.
|
Accession number;05A0248788
|
| Title;Reduction in the temperature of blast furnace heat conservation band using carbon material - ore macroscopic composite. |
| Author;
NAITO MASAAKI
(Nippon Steel Corp., JPN)
NAKANO MASANORI
(Nippon Steel Corp., JPN)
|
Journal Title;Current Advances in Materials and Processes
|
Journal Code:X0994A
|
ISSN:0914-6628
|
|
VOL.18;NO.1;PAGE.2-5(2005)
|
| Figure&Table&Reference;FIG.4, TBL.3, REF.8 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;As a means of further improving reducibility and low-temperature droping performance necessary for the realization of a compact blast furnace, the authors examined the nonspherical formation of lump ore of carbon material containing type. Improvement in feed material distribution controllability and reducibility acceleration were aimed at through nonspherical formation. The authors selected tetra-state aspherical cement-bonded charcoal-containing lump ore (77% of hematite, 17% of powder coke, and 6% of cement) from a laboratory strength preliminary test. They examined the reduction behavior and softening melt property using BIS test and large melt-dropping test equipment, and obtained the following results. (1) Tetra-state charcoal-containing lump ore is the most suitable shape for manufacturing from the viewpoint of the formability and product strength. (2) In the melt dropping test, all tetra-shape showed the reducibility more excellent than all sintered ore. Through the mixing of 50% of tetra-shape to sintered ore, melt dropping property of the whole raw material was improved. (3) Through the mixing of 50% of sintered ore to tetra-shape, the reducibility of sintered ore was also promoted. The reduction in RAR 45kg/t was estimated due to the increase in 2.9% of shaft efficiency and the lowering of heat conservation band temperature by 170.DEG.C.. |
|
|
|
Related Articles;
|
|
