Why does white alumina oxide exit black spot?
There’re black spots in white alumina oxide, may be because the impurities it carries are not removed clean. Rust is a more common magazine, because the white alumina oxide raw material itself exists iron oxide, if not removed clean, there will be black spots. In addition, in the production process, because the mechanical rust will also accidentally incorporated rust, eventually leading to the color of white alumina oxide is not pure.
From the production point of view, if the smelting time is insufficient, or the smelting process is immature, it will lead to low purity of white alumina oxide, high impurity content, and small black spots will be seen in the color.
In general, whether the color of white alumina oxide is pure is one of the standards for detecting the quality of white alumina oxide. If the quality of white alumina oxide is not up to the standard, it will have a great impact on its performance, the most obvious reflected in the hardness and grinding force. Therefore, manufacturers must be strict in production and pay more attention.