Comparison of brown aluminum oxide products smelted by different methods:
1. Brown aluminum oxide produced by the pouring furnace (method) has more crystal aggregates, small crystal size, high glass phase and distributed on the grain boundary, so it has poor toughness, high brittleness, easy detachment of abrasive grains, good self-sharpening, good density, and is more suitable for consolidated abrasives and refractory materials.
2. Brown aluminum oxide produced by the frit furnace (method) has fewer crystal aggregates, large crystal size, less glass, so it has poor brittleness, high toughness and good wear resistance. Due to its large crystals, good toughness and brittleness, brown fused alumina produced by this smelting method is more suitable for coated abrasive manufacturing. Therefore, it is still the abrasive with the largest amount of use in abrasive belt production.
3. The chemical composition, phase composition and specific gravity of brown fused alumina produced by the flow smelting method are equivalent to those of the frit method. Crystal size, microhardness, crystal structure and compressive strength of the flow method are slightly lower than those of the frit method. This is because the brown aluminum oxide produced by the exile method has the characteristics of microcrystalline corundum in these aspects. Although it is slightly lower than that produced by the frit method, it shows better results in use.
Comparison of production and application of brown fused alumina smelting by different methods:
1. Flowing method: continuous production, high degree of automation, but large investment, complex structure, suitable for high-power smelting.
2. Pour method: continuous production, high degree of mechanization, small investment, good production efficiency, currently a commonly used method.
3. Fixed method (melt method): intermittent production, low degree of mechanization, but small investment, simple equipment, convenient process, is currently the main method for small abrasive factories to smelt brown aluminum oxide.
