Magnesium oxide is widely used in life, and plays a vital role in the production of some raw materials in the industry. When purchasing magnesium oxide, light-burning powder needs to conduct relevant tests on the activity of magnesium oxide. For the production of raw materials In other words, if the activity of magnesium oxide is insufficient, it will easily lead to the quality of the material not meeting the standard, so its activity is very important. How to detect it? The editor will introduce it to you. Taking magnesium oxide for adhesives as an example, I will explain it to you, hoping to help you.

      In the stock magnesia, take out 100 grams of magnesia samples from different corners and different positions (not less than 3 places), and mix them evenly. Accurately weigh 100g of magnesium oxide powder from the mixed powder, put it in a constant-weight dry beaker, add 400g of purified water to make it completely wet. Put the cup into a drying oven with adjusted temperature (110℃), bake for more than 2 hours, and then adjust the oven to 150℃ to dry the sample to constant weight. Activity calculation method: active content of magnesium oxide=[W—100)/45] 100% In the formula, 100 is the sample weight before hydration; W is the sample weight after hydration; 45 is the conversion factor. Note: In order to obtain a more accurate value, you can take three 100g magnesium oxide assays, add the final active content values, and divide by 3. The problem that needs to be paid attention to in the magnesium oxide activity detection is to avoid the material during the heating process. The slurry splashes out of the beaker; the drying time is as long as possible to ensure the complete evaporation of water.

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