本文介绍了采用催化剂Ｐ来抑制或屏蔽矿石中活性氧化硅，进而提高氧化铝溶出率的试验研究。由于催化剂作用，使得选择性拜耳法溶出得以实施，同时研究了选择性拜耳法溶出动力学。矿石中活性氧化硅在含有催化剂的母液中溶解速率降低的原因是其溶解反应的活化能显著增大，Ｐ型催化剂的抑制作用远远大于温度效应。 This article describes the use of catalyst P to inhibit or shield the active silica oxide, and thus improve the dissolution rate of alumina experimental study. Due to the catalyst effect, selective Bayer-method dissolution was performed, and selective Bayer process dissolution kinetics was also studied. The reason why the dissolution rate of activated silica in the ore containing catalyst is decreased is that the activation energy of the dissolution reaction significantly increases. The inhibition effect of P-type catalyst is far greater than the temperature effect.