REFRACTORIES & LIME ›› 2012, Vol. 37 ›› Issue (4): 8-10.

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Effect of pH values of silica micropowder on properties of magnesian castable

Chen Yang    Chen Changping    Zhao Liang    Zhang Wen   

  1. Puyang Punai High Temperature Material(Group)Co., Ltd., Puyang 457100, China
  • Online:2012-08-31 Published:2012-08-31

Abstract:

The effects of several kinds of silica micropowder with different pH values on the flowability and physical of magnesian castable are studied by taking magnesia as major raw material and using MgO-SiO2-H2O bonding system. The result shows that the magnesian castable by adding the silica micropowder with subacidity has good flowability and higher strength and the magnesian castable by adding the neutral silica micropowder has even better percent retention of flowability.

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