Qingdao Zhongye High-Temperature Materials Co., Ltd.

The preheating steps for the first use of the crucible are as follows: 1. After placing the crucible in the furnace, slowly heat it for two hours until the temperature reaches 200 degrees Celsius to remove moisture.

2. Next, heat the crucible at low power to 600 degrees Celsius after 1.5 hours, then use full heating power to reach 950 degrees Celsius after half an hour, and hold at that temperature for about one hour. This ensures the glaze fully melts, improving its oxidation resistance and maximizing the crucible's lifespan.

3. After reaching 950 degrees Celsius, add material as required.

4. The curve is shown as the green line in the figure.

The preheating steps for reuse are as follows:

1. First, slowly heat the crucible for two hours until the temperature reaches 600 degrees Celsius to remove moisture and ensure the glaze and anti-oxidation coating on the crucible surface fully sinter to prevent oxidation and extend the crucible's lifespan.2. Then continue heating, reaching 950 degrees Celsius after half an hour, and hold at that temperature for about one hour. Then add material as required.3. The curve is shown as the red line in the figure.