Fixed furnace white corundum and dumping furnace white corundum differ in the following aspects:
- Production process
- Fixed furnace: In the production of fixed furnace white corundum, the raw materials are placed in a fixed furnace for smelting. After smelting, the furnace body does not move, and the corundum is cooled and solidified in the furnace. The solidified corundum block has the characteristic of uneven quality, with better quality in the center and unstable quality in the outer part.
- Dumping furnace: When producing white corundum in a dumping furnace, after the smelting is completed, the furnace body is tilted to pour out the corundum melt into a specific container for cooling and solidification. This production method has a high degree of industrialization for large blocks, and the quality of the produced white corundum is relatively uniform.
- Physical properties
- Hardness and toughness: The fixed furnace white corundum has a higher bulk density and hardness. For example, its Vickers hardness can reach 2186.6HV0.2, and it has better toughness and is more wear-resistant and durable. Dumping furnace white corundum has a slightly lower hardness, with a Vickers hardness of 2149.1HV0.2, but it has good self-sharpening properties.
- Purity: The utilization rate of alumina raw materials in the dumping furnace is higher, and the produced white corundum has a higher purity, which can meet the requirements of occasions with high-purity requirements.
- Product performance
- Volume density and porosity: The fixed furnace white corundum has a high bulk density, which means it has a high volume density, low porosity, and relatively rounded particle shapes. The dumping furnace white corundum has a relatively low bulk density, a relatively high volume density, high porosity, and more angular particle shapes.
- Price
- Due to factors such as production process and product quality, the production cost of fixed furnace white corundum is relatively high, so its price is generally higher than that of dumping furnace white corundum.
