20210.00 Dollar US$ Analysis on the use stage of well furnace Doha

Published date: September 7, 2020
  • Location: Shanghai, Doha, Ad Dawhah, Qatar

Analysis on the use stage of well furnace
There are several stages in the operation of a well furnace:
Furnace installation, exhaust and temperature rise:

1, after the well furnace to the temperature insulation 0.5~1h, make the temperature uniform, into the parts, hanging parts should be more than 10mm gap, to ensure that the gas unblocked.

2, the parts must be placed in the effective heating zone of the furnace tank, the upper end should not exceed the exhaust pipe, the lower end should keep a certain distance from the intake pipe, after installing the furnace exhaust time is about 20~60min.

3. The sample should be placed in three different positions: upper, middle and lower.

4, after the installation of the furnace, should immediately send infiltration agent exhaust (ethanol drops), when the temperature of the furnace to the specified temperature, in the outlet of the exhaust gas, such as the flame does not point, should increase the amount of infiltration agent or timely clean up the pipe pile.

5, the new furnace and the new fixture should be pre-nitriding treatment for 3~5h.

Insulation stage:

1. Check whether the ammonia decomposition rate and flow rate are normal at any time. When the furnace temperature meets the requirements and the ammonia decomposition rate is unstable, adjust the flow rate of ammonia gas, increase the flow rate, reduce the decomposition rate, and increase the decomposition rate.

2. In some nitrification tanks, the ammonia decomposition rate increases during long-term use. In order to stabilize the ammonia decomposition rate, 800~960 C 2~4h denitrification treatment is required after the furnace is shut down.

Furnace cooling:

Parts with high fatigue strength requirements shall be oil-cooled and silver-gray parts shall be required on the surface. Under the protection of ammonia or cracking gas, the lifting tank shall be cooled to 200 C before opening the tank to retrieve the workpiece.
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