The casting process of chromium corundum for multi-component fused zirconia corundum bricks is very complicated, because each component has its own melting point and crystallization temperature, which differ from each other by Baidu and sometimes thousands of degrees, the temperature in the working process How does the control work?
As we all know, before discharging the molten fused brick, the molten body must be heated. For example, for steel, the temperature before pouring should be 100 degrees higher than the melting point in order to completely fill the model to obtain precise geometrical castings.
For chromium corundum, the temperature is 200 degrees higher. When melting and pouring multi-component ingredients, generally rely on eutectic point or invariant point. At this time, each component can crystallize at the same time.https://www.hslabrasive.com/products/fused-alumina/
If the temperature of the multi-component fused brick melt does not rise to the temperature of the most refractory component, the low-temperature component can be overheated to discharge the melt. But in this case, the fused brick will contain unmelted components.
According to the analysis of the selection of ingredients, there is little difference in melting point between the components of general refractory materials. But in the ternary system of chromium corundum and chromium spinel, the difference is about 1000 degrees: therefore, there are difficulties in formulating the pouring process of fused bricks, but there is no such difficulty in pouring steel.https://www.hslabrasive.com/
As we all know, before discharging the molten fused brick, the molten body must be heated. For example, for steel, the temperature before pouring should be 100 degrees higher than the melting point in order to completely fill the model to obtain precise geometrical castings.
For chromium corundum, the temperature is 200 degrees higher. When melting and pouring multi-component ingredients, generally rely on eutectic point or invariant point. At this time, each component can crystallize at the same time.https://www.hslabrasive.com/products/fused-alumina/
If the temperature of the multi-component fused brick melt does not rise to the temperature of the most refractory component, the low-temperature component can be overheated to discharge the melt. But in this case, the fused brick will contain unmelted components.
According to the analysis of the selection of ingredients, there is little difference in melting point between the components of general refractory materials. But in the ternary system of chromium corundum and chromium spinel, the difference is about 1000 degrees: therefore, there are difficulties in formulating the pouring process of fused bricks, but there is no such difficulty in pouring steel.https://www.hslabrasive.com/
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