Increasing the strength of green magnesia refractories by using combined binders

The effect of the pH of the lignosulfonate (LST) medium on the strength of the green and the qualitative parameters of magnesia parts is established. LST with a weak alkaline medium are recommended for periclase parts, and LST with a weak acid medium are recommended for chrome-containing parts. The effect of some modifying additions to LST is investigated with testing of it in batch production. Combined binders (mixtures of LST with sodium and ammonium bases) are shown to have a positive effect on the properties of the green and ready parts.