The ceramic body to be fired has been dried to a certain hardness.
Brush a layer of alumina on the cover to avoid sticking the lid and the tank mouth together under high temperature.
Loading kiln, height, size reasonable collocation, as much as possible.
The height touches the top of the kiln to maximize the utilization of the limited space in the kiln.
Ignition, there are four flame points inside the gas kiln, start to ignite two diagonal points, and wait for the temperature to rise slowly. Before 600 ℃, it is the stage of precipitation of water, which is also the most prone to problems. The temperature can not rise too fast.
Record the time and the corresponding temperature change, the water removal stage is generally 1 hour, the temperature rises about 80 degrees Celsius, this process will continue to make small adjustments.
There are several observation holes on the kiln door to observe the flame situation at different positions in the kiln.
When the temperature is high, the flame will eject from the observation hole. This situation is more obvious in the anoxic reducing atmosphere, and the flame ejects from the observation hole to absorb the outside oxygen.
Late at night, the firing temperature has reached 1099 degrees Celsius, lasting about 11 hours.
The moment of kiln opening.
Compared with the moment of entering the kiln.
There is a thick fire skin on the surface of the tea pot. The main component is iron produced by reaction. The fire skin will be removed when grinding.