Szczegóły publikacji
Opis bibliograficzny
Racjonalna gospodarka rudami żelaza na przykładzie metalurgii proszków — Rational management of the iron ore on the example of the powder metallurgy / Piotr DUDEK, Andrzej CIAŚ, Wojciech ŚLĘZAK // Gospodarka Surowcami Mineralnymi = Mineral Resources Management ; ISSN 0860-0953. — 2008 — t. 24 z. 3/3, s. 69–77. — Bibliogr. s. 76, Streszcz., Abstr. — III Krakowska konferencja młodych uczonych : pod patronatem JM Rektora Akademii Górniczo-Hutniczej im. Stanisława Staszica prof. dr. hab. inż. Antoniego Tajdusia : Kraków, 25–27 września 2008 / red. zeszytu: Michał Kopacz, Adam Szurlej ; Grupa Naukowa Pro Futuro, AGH Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. — Kraków : IGSMiE PAN, 2008
Autorzy (3)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 40863 |
|---|---|
| Data dodania do BaDAP | 2008-10-20 |
| Rok publikacji | 2008 |
| Typ publikacji | referat w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Gospodarka Surowcami Mineralnymi - Mineral Resources Management |
Abstract
The fast growth of the world economy be driven the height demand into iron ores and steel. The production of iron ores achieved in 2006 reached 1790 Mt, and crude steel up to 1344 Mt in 2007. The largest importer on the world and the largest steel manufacturer is China, which in 1991 imported only 14 Mt of iron ores, and in 2006 already 326 Mt. About 60% of steel is produced in the metallurgic process from the crude iron. The rest of steel production is obtained in electric arc furnaces, where a base charge steel scrap is used. However, in the world, sponge iron is more and more often used by steel manufacturers as a charge, obtained as a result of the low-temperature process of the direct reduction ores, without carrying out this reduction product into the liquid state. Majority of the iron powder, used both in powder metallurgy processes and for the production of jackets of electrodes to the arc welding, is produced also from the sponge iron obtained with method of the direct reduction. It is contributing for energy-efficient, ecological and rational using this ores. Sponge iron is a recognized alternative to steel scrap as a raw material for the manufacture of iron powders. It is produced by reducing iron ore without melting it. The basic raw materials for the production of sponge iron are iron ore, non-coking coal and dolomite. Reducing agents used to produce sponge iron from iron ore can be coke, coal, charcoal, and petroleum coke. The advantage of this technique is that iron can be obtained at a lower furnace temperature, only about 1100 degrees C. This makes for an energy-efficient feedstock for powders manufacturers which used to rely upon scrap metal. The disadvantage, relatively to using an atomization, is that only small quantities can be made at a time. Therefore, it becomes imperative to select an ore with a high Fe content and a low gangue content, to optimize process.
