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Several  Common Questions Possibly Appeared When Porcelain Tablewares are Made

Several Common Questions Possibly Appeared When Porcelain Tablewares are Made

2024-01-12

The control of the firing atmosphere of ceramic products is restricted by the kiln structure and equipment configuration, such as the size of the fan air volume, duct diameter, placement of exhaust ports, hot air outlets, and moist air outlets, all of which can affect the control of the firing atmosphere. However, the most crucial factors are maintaining a stable pressure system and operating the burner reasonably.Stable pressure system: Pressure changes can affect the flow state of gases, so fluctuations in the kiln pressure system will cause fluctuations in the atmosphere. In order to control the atmosphere, it is necessary to stabilize the pressure system, and the key to a stable pressure system lies in controlling the zero-pressure surface. In the kiln preheating zone, the pressure is relatively low compared to the external environment due to the need to remove moisture and combustion-generated smoke, resulting in negative pressure inside the kiln; in the cooling zone, cold air is introduced to cool the products, resulting in relatively higher pressure compared to the external environment, leading to positive pressure inside the kiln; between positive and negative pressure, there is a zero-pressure surface, and the firing zone is located between the preheating zone and the cooling zone, so the movement of the zero-pressure surface will cause changes in the firing zone atmosphere.

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