Firebox structure of pusher plate kiln in calcining apparatuses for preparing alloy of vanadium-nitrogen continously
A technology of furnace structure and vanadium-nitrogen alloy, which is applied in the field of vanadium-nitrogen alloy, can solve the problems of extremely serious oxidation erosion of graphite lining and small oxidation erosion of graphite material in the inner cavity, so as to improve service life, prevent corrosion and ensure normal operation Effect
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[0024] Example 1:
[0025] Before the implementation of the present invention, the inner lining of each temperature zone of the pusher kiln is made of corundum, the heating element cavity is not isolated from the furnace, the service life of the pusher kiln is only about 25 days, and the heating element replacement frequency is 8.2 pieces / Every day, the frequency of power failure of the pusher kiln is 3.7 times / day.
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[0026] Example 2:
[0027]Before the implementation of the present invention, the lining material of the pusher kiln is graphite material, the heating element cavity in the 6-7 temperature zone is isolated from the furnace, the service life of the pusher kiln is 70 to 90 days, and the heating element replacement frequency is 5.4 per day. The frequency of power failure of the pusher kiln is 2.6 times / day.
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[0028] Example 3:
[0029] In the implementation of the technical scheme of the present invention, the lining of the low temperature section, the rear of the transition section and the high temperature section of the pusher kiln are all made of graphite materials, and the side walls and tracks at the front of the transition section are made of high-purity fused magnesia bricks and top bricks. For graphite bricks up to 200mm thick, the heating element cavities in each temperature zone are isolated from the furnace, and the furnace height in the 8-temperature zone is 80mm lower than other temperature zones. After implementation, the service life of the pusher kiln has been increased to 220 to 240 days, the frequency of heating element replacement has been reduced to 0.8 per day, and the number of power failures has been 1 to 2 times per month.
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