The influence of the raw material composition of white corundum on the quality
The main raw material for the production of white corundum is industrial alumina, and if the quality of white corundum is to be produced, the content of raw materials is very high.
One of them is that the content of alumina in industrial alumina must be controlled above 98%, not lower than this value. The reason is that the alumina content of white corundum that we usually know is more than 99%, and if the alumina content of its raw material is too low, the content standard of the produced white corundum must not be met, so for white corundum Performance and quality are both a big influence.
The other is sodium oxide. Generally, the content of sodium oxide is required to be less than 0.6%. And good quality will require it to be less than 0.3%. The high requirement for sodium oxide is mainly because the chemical properties of sodium oxide are relatively active and easy to react. If it reacts with alumina, a large amount of alumina will be consumed, which will easily lead to substandard alumina content and affect smelting.
In addition, if the content of sodium oxide is too high, the high temperature resistance of white corundum will be affected to a certain extent. Because of the special structure of white corundum, many impurities can help it.
In short, the production of white corundum must pay attention to the detection of the content of each component of its raw materials, otherwise it may be produced in vain workmanship or poor quality. It should be noted that in addition to the content of alumina and sodium oxide, moisture, particle size, etc. require a little attention