Lining method of EAF bottom ramming mass

 After feed in EAF bottom ramming mass, use a shovel or a nail rake to level it, and then use an aluminum alloy long ruler and a level to level it, taking the baseline released in advance as the standard, and then spread a canvas on the leveled ramming material, and the canvas will ramming the furnace bottom cover it all.

Put two vibrators on the canvas and keep a certain distance between the two vibrators. At the beginning, the two vibrators are best placed on the two ends of the furnace diameter inside the furnace shell. This will not only avoid mutual interference, but also enable the operator to reduce dust damage.

After the vibrator is activated, it starts to vibrate from the outer ring and ramming from the outside to the inside. The next circle should overlap the previous one by one third to prevent missed beating. Continuously vibrate from the inside of the brick wall until the center of the furnace is regarded as-times. After the ramming is completed, the ramming is repeated several times from the outside to the inside, and each layer of ramming material is simultaneously rammed multiple times with two vibrators.

After each layer of ramming is finished, remove the dust-proof canvas, and use a homemade nail rake to pull the surface of the ramming material in the same direction and comb into grooves to help increase the contact area of the upper and lower adjacent layers to form a seamless overall ramming stove bottom.

The density of the ramming material after compaction should reach 2.8g/cm2 or more. At this time, the vibrator jumps up and down, the amplitude is larger, and the vibration sound is louder than the previous few times. These phenomena indicate that the material layer is basically solid.

Knotting quality inspection method: use a 4mm diameter iron rod, such as φ 4mm welding rod, the insertion depth does not exceed 20mm.

Article Source:Lining method of EAF bottom ramming mass
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