本文研究了Ｑ相－Ｃ４ＡＦ－Ｃ２Ｓ系统中各相的共存条件。当在Ｑ相生料中加入少量Ｃ４ＡＦ时，会降低Ｑ相的形成温度。但是在高温下由于Ｍｇ２＋在Ｃ４ＡＦ中的固溶，大量的Ｃ４ＡＦ加入时反而不利于Ｑ相形成。这时需要在Ｑ相－Ｃ４ＡＦ生料中加入适量ＭｇＯ。对于Ｑ－Ｃ４ＡＦ－Ｃ２Ｓ－Ｃ１２Ａ７系统，当碱度系数≥１时，Ｑ相、Ｃ４ＡＦ、Ｃ１２Ａ７和Ｃ２Ｓ可在较大范围内共存 In this paper, the coexistence conditions of each phase in the Q-C4AF-C2S system are studied. When a small amount of C4AF is added to Q phase raw material, the formation temperature of Q phase will decrease. However, at high temperature due to Mg2 + in C4AF solid solution, a large number of C4AF added but not conducive to Q-phase formation. At this time, you need to add the appropriate amount of MgO in Q phase-C4AF raw material. For the Q-C4AF-C2S-C12A7 system, Q phase, C4AF, C12A7 and C2S coexist in a wide range when the alkalinity coefficient is ≥1