Magnesia contains three substances, over-burning product, due to burning products, active magnesium oxide, magnesium oxide activity and now we talk about the important main ingredient to produce chlorine oxygen magnesium cement in the building materials industry is magnesium oxide and magnesium chloride, more precise point He said it should be inside the active magnesium oxide with magnesium oxide and magnesium chloride ions generated inside a chemical reaction to produce chlorine oxygen magnesium cement. Why the low activity of the product not? Below a simple explanation: activity, over-burning, less burned magnesium oxide is a component in inverse proportion, and since the resulting magnesium oxychloride cement part by activity in the building materials industry so burnt goods and products are under-firing excess impurities.