Strictly speaking, magnesium oxide beyond the shelf life will generally affect Reburned magnesite Its own activity. However, if the stock is large, discard it and worry about waste. Now we tell you that you can check whether it can be used again from the following aspects. Desulfurized magnesium oxide production
The first is a preliminary inspection. Normally, magnesium oxide should be white powder. If the magnesium oxide is deteriorated, the color will change. In addition, the whiteness of magnesium oxide decreases, indicating that the activity of magnesium oxide has changed. In addition, if the shape of magnesium oxide can be observed to change significantly (caking, etc.) and its properties are uneven, it is generally not recommended to use it.
Then check the storage conditions of magnesium oxide: magnesium oxide is a kind of material that is easy to absorb water and get damp. If the moisture is not well protected during storage or transportation, it may cause magnesium oxide to denature and lose its use value. In daily work, magnesium oxide can be protected from water absorption and deterioration by the following ways. 1. Cover plastic film on the top and lay plastic film on the ground. If you are unwilling to change the bag for packaging, you can use this method to prevent moisture; 2. Put lime blocks after stacking to prevent moisture, which is another way to prevent magnesium oxide from absorbing moisture and reducing activity; 3. Because calcium oxide has stronger moisture absorption, it is very effective to place calcium oxide in the warehouse as a moisture reducing agent to reduce the humidity of the warehouse;
Finally, we need to know how long the magnesium oxide has exceeded its shelf life: how long is the storage time of magnesium oxide? One or two months after the expiration date, there must be a big difference from one or two years after the expiration date. Secondly, where is magnesium oxide used? Is it important to use magnesium oxide products? If a fault occurs, will it cause great losses? Generally speaking, if there is no obvious change in the appearance of magnesium oxide, we suggest that it is better to re test the activity of magnesium oxide. The magnesium oxide test can quantitatively and accurately determine the activity of magnesium oxide through professional testing equipment. Ensure that the activity will not be reduced and the product quality will not be affected by misuse due to too long storage time.
The most important thing is to hope that it can be used up as much as possible within the warranty period. Otherwise, if it expires, no matter how well it is protected, its activity will be affected and the purchased magnesium oxide will be wasted. I hope everyone can use high-quality magnesium oxide.
