Today, let us talk about the special magnesium oxide used for grinding wheel: rubber resin wheel, vitrified abrasive, ect.
The functions: it can enhance strength and abrasion resistance, therefore, it is not easy to crack. The grinding wheel added magnesium oxide will be more wear-resisting.
The requirements for magnesium oxide: the content of MgO should be equal or greater than 92%, the content of CaO should be less than or equal to 1.5%, the specific volume should be equal or greater than 5.5ml/g, the residue on sieve should be less than or equal to 0.01. For the size distribution, crystal structure, fineness, activity degree, heavy metal, whiteness, water solubles, hydration rate, black and white point, mechanical impurities, clarity, resistance to elevated temperatures, mobility, filtering effect, etc, the special magnesium oxide for grinding wheel has special requirements. The residue on sieve and calcium of this kind of magnesium oxide can not more than standard content, otherwise, it would cause breakage of grinding wheel.