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EAF Bottom Ramming Mass Introduction:
EAF Bottom Ramming Mass is suitable for high-power EAF, ultra-high-power EAF bottom, furnace slope and other parts. Dry ramming mass can be used for the bottom of DC and AC EAF furnace, carried out construction by ramming.
Ramming mix for EAF production technics:
1.Based on high purified compound dolomite sand and high purified magnesia.
2.Add magnesia iron sand.
3.Adding certain quantity of anchoring agent .
EAF Bottom Ramming Mass Use method :
1.Spread the material in the bottom with thichness of100mm to 150mm and rammed hard,
2.Clean the surface, repeat the ramming work once again
3.Put a piece of steel sheet on the surface to avoid damage on the surface when putting scrap and hot metal.
4.Knotting quality inspection method: use a 4mm diameter iron rod, such as φ 4mm welding rod, the insertion depth does not exceed 20mm.
EAF Bottom Ramming Mass Advantages:
1.Easy to sinter ;
2.Strong anti-permeability;
3.High refractoriness;
4.Long service life.
5.Good sintering property and strong corrosion resistance
6.It can be constructed for the first time, and can also be hot-repaired.
Sintering Method of EAF bottom ramming material:
The first heat of steel is of great significance to the sintering of the ramming material, and the oven work needs to be done well.
(1)Tightly cover the surface of the material layer with 1mm thin steel plate, weld if necessary, and add scrap steel for smelting.
(2)The 100t electric EAF smelting process is mainly based on the smelting method of 75% scrap steel + 25% molten iron. The scrap steel is added to the first EAF in two batches and must not be mixed with molten iron. It is divided into two chargings. Each basket weighs 60t and the carbon content is about 1.00%.
(3)The first EAF smelting adopts a reasonable power supply system. The drying time is longer than 90 minutes after the power failure. After the drying is completed, oxygen is blown at the minimum flow rate to make foamy slag.
(4) In the later stage of smelting, the temperature of molten steel is greater than or equal to 1650C, and it is maintained for more than 15 minutes. After the composition and temperature are qualified, the steel is tapped.
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