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Future Development of Ironmaking Industry

Time:2016-10-28 16:40:01

It is expected that the iron-making industry should develop and progress in the following areas:

1, low-cost ironmaking
As the iron ore prices, the shrinking of the steel market, iron and steel enterprises have to take careful management and meticulous management to reduce production costs.
1) Use cheap iron ore
In the 1990s, Japan began to purchase cheap goethite in Austrian mines. Goethite contains a lot of crystal water. Because of the amount of gangue in the lead-blue cristobalite and the content of alumina and crystal water in the gangue, the fine ore is more and the sintering performance is worse. To this end Nippon Steel has developed the use of selective granulation method to make alumina closed (harmless) technology.
At the same time, to improve the sintering machine under the feed roller function of the feed, the use of rack sintering method to improve sintering productivity, the use of lower production of raw materials, low SiO2 sintered ore, granulation by strengthening the small ball structure, improve sinter Cold drum strength and drop strength. In 2004, the proportion of goethite used in Australian mines was 60%.
2) weak caking coal technology
In addition to using CDQ, Nippon Steel has also developed coal-based moisture control technology and briquette coking technology. The proportion of weak caking coal is more than 50%. / RTI & gt;
2, low-quality ore smelting
1) limonite sintering technology
High proportion of limonite conditions, to optimize the allocation of ore, an appropriate increase in fuel consumption, extend the ignition time, increase the thickness of the material layer and sinter alkalinity, and take pressure and other technical measures.
2) high alumina sintering technology
Sintering with light burned magnesia powder, high magnesium powder, high magnesium ball can achieve a good smelting effect, reduce costs.
3) hematite pellet roasting
Boron and magnesia are added in the sintering process. Boron can improve pellet strength, and magnesium oxide can improve pellet metallurgical properties.
3, low-carbon steelmaking technology
Iron and steel metallurgy process, iron making process directly and related CO2 emissions more than 90%. Low-carbon ironmaking is the key to the iron and steel industry to develop low-carbon economy. Increasing blast furnace top gas cycle, full-oxygen blast furnace, injection of waste plastics and other new technologies, will enhance the level of low-carbon steelmaking technology.
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