Converter bottom blowing air brick, special drilling machine and quick thermal replacement method of air brick
A technology of converter bottom blowing and air-permeable bricks, which is applied in the manufacture of converters, etc. It can solve the problems of chemical corrosion of refractory materials, inability to synchronize furnace ages, and damage to protective sleeve bricks, and achieve good high-temperature strength and thermal shock resistance. Replacement time and cost saving effects
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[0039] The bottom-blown ventilating brick for the converter of the present invention includes a ventilating core brick 1, a protective cover brick 2, a furnace bottom flange 5, and a cylindrical flange 6.
[0040] The figure shows that the ventilated core brick 1 of the present invention is a three-stage ventilated core brick suitable for rapid thermal replacement. The characteristics of the brick are: (1) The upper section 10 is a corroded section, which is a cylinder with a smaller diameter. The external dimensions of the body are: diameter * length = Φ (80 ~ 150) * (400 ~ 800) mm, the cylinder can be matched with the sleeve type drill bit, and the holes required by the smaller diameter can be easily drilled. (2) The middle section 11 is a quick-change section. This section is a truncated cone with a larger taper. The external dimensions are: upper stage diameter / lower stage diameter*length=Φ(80~150) / Φ(120~180)*(150~ 300) mm. When hot replacement, the residual bricks of the tru...
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