Converter is it is raw material with molten iron and useless steel, course slagging, blow oxygen to wait for de-carbon, get the molten steel that accords with a requirement with refine. Its smelt metal steel-making is planted different, the service life of lining is different. If furnace is big, smelt carbon steel, criterion smelt temperature is inferior, the composition of broken bits is more constant also. Accordingly, service life is taller. And if again dephosphorization waits, service life drops a lot of.
In recent years, converter smelt technology also got very great progress, especially the development that converter answer blows engineering technology, find a place for in converter hearth namely air feed brick, through air feed brick to gas of nitrogen, carbon dioxide, argon or oxygen are blown inside furnace, aggrandizement bath agitate, improved smelt reaction, shortened so steel-making time, raised steel to water quality is measured and reduce steel-making cost. But answer blow what also quickened fireproof to lining material to erode.
The application of magnesian charcoal brick in converter steel-making
Cap of hearth, furnace: Brick of MT-148B magnesian charcoal;
Mouth of furnace cap, tapping: Brick of MT-14A magnesian charcoal;
Shaft, trunnion, bath: Brick of MT-18A magnesian charcoal;
Tapping mouth: Brick of MT-lOA magnesian charcoal;
Air feed brick: Brick of GQ-1 magnesian charcoal;
Intermediate layer: ML-87 magnesia brick;
Converter each place is differred of the condition erode. In furnace cap, erode with slag, air current erodes namely the oxidation of magnesian charcoal brick and clear the damage when furnace cap is given priority to, because this furnace cap should be used,fight the magnesian charcoal brick with oxidation and strong Zuo high had better. To converter trunnion area, get of slag erode badly, air current erodes and oxidize, and be made by mechanical stress use, repair particularly not easily, because this should choose carbolic content be able to bear or endure for the excel in of 16-18% ,erode magnesian charcoal brick, to broken bits line, basically get of slag erode, choose the magnesian charcoal brick that high quality Gao Kang erodes so.
To side of feed a machine, besides get of steel and broken bits outside eroding, the concussion when still be installed molten iron and useless steel raw material and erode, and this is very serious, the brick of excel in magnesian charcoal that accordingly this area is eroded with Gao Kang and fights thermal shock.
Tapping mouth is eroded by leap of corrode of oxidation, broken bits, temperature, molten steel wait for action, because this is used,fight the magnesian charcoal brick of oxidation excel in, high. Want to improve the service life of converter, lining is fireproof a material is influence service life main factor, but, operating a condition is mainer factor, good use condition is the foundation of lining longevity life.
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