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利用钾长石–KOH–H2O 体系分解反应所得硅酸钾碱液，合成针状硬硅钙石，用作合成硅灰石的前驱体。采用 OLI Analyzer 9.2 软件模拟 K2O–Ca O–Si O2–H2O 体系化学平衡，预测了合成硬硅钙石的初始 Ca O/Si O2摩尔比、反应温度和液固比范围。在此基础上通过单因素实验，确定了合成硬硅钙石的优化条件。反应历程为：水合硅酸钙→雪硅钙石→雪硅钙石+硬硅钙石→硬硅钙石。合成的硅灰石保持了硬硅钙石的针状形貌，分散较均匀，长约 10–15 μm，直径约 300 nm，长径比约 40，符合建材行业一级品标准。
Potassium feldspar - KOH-H2O system decomposition reaction of potassium silicate lye, synthetic acicular xonotlite, synthetic wollastonite precursors. The chemical equilibrium of K2O-Ca O-Si O2-H2O system was simulated by OLI Analyzer 9.2 software to predict the initial CaO / Si O2 molar ratio, reaction temperature and liquid-solid ratio range of synthetic xonotlite. On this basis, through the single factor experiment, the optimum conditions for the synthesis of xonotlite were determined. The reaction process is: hydrated calcium silicate → tobermorite → tobermorite + xonotlite → xonotlite. The synthesized wollastonite maintains the needle-like morphology of xonotlite and has a uniform distribution of about 10-15 μm in diameter, about 300 nm in diameter and an aspect ratio of about 40, which is in line with the first grade of building materials industry.