Large amounts of by-products, including glauber’s salt (GS) and microsilica (MS), are accumulated from chlor-alkali industry and ferrosilicon industry development, which not only wastes precious resources, but also causes serious environmental problems. In order to recycle and reuse these industrial by-products, solid sodium silicate was synthesized using GS and MS as the main raw materials, and semi-coke (SC) as the reducing agent. The effects of melting parameters including GS/SC and MS/GS molar ratio, heating rate, temperature, reaction time, and SC particle size on the conversion efficiency and modulus of solid sodium silicate were investigated and optimized. Under optimal conditions, the maximum conversion efficiency of 94.91% was obtained with modulus of 2.5. Characterization analysis of the products indicated that the amorphous silicate sodium was successfully synthesized. Moreover, the reaction mechanism was investigated, which focused on the thermal behavior and phase transformation using thermo-gravimetric and differential scanning calorimetric (TG-DSC) and in-situ X-ray diffraction. Additionally, the causes and suppression measures of “glauber’s salt water” (GSW) during the experiment were summarized. This work not only creates resource utilization of GS and MS, but also provides the foundation for the synthesis of sodium silicate with GS.

氯碱工业和硅铁工业的发展积累了大量的副产品，包括芒硝（GS）和微硅粉（MS），不仅浪费了宝贵的资源，而且造成了严重的环境问题。为了回收利用这些工业副产品，以GS和MS为主要原料，半焦（SC）为还原剂，合成了固体硅酸钠。研究并优化了熔解参数包括 GS/SC 和 MS/GS 摩尔比、加热速率、温度、反应时间和 SC 粒径对固体硅酸钠转化效率和模量的影响。在最佳条件下，模数为2.5时获得了94.91%的最大转换效率。产物的表征分析表明，成功合成了无定形硅酸钠。此外，研究了反应机理，重点是使用热重和差示扫描量热（TG-DSC）和原位 X 射线衍射的热行为和相变。此外，总结了实验过程中产生“芒硝”（GSW）的原因和抑制措施。该工作不仅创造了GS和MS的资源化利用，而且为GS合成硅酸钠提供了基础。此外，总结了实验过程中产生“芒硝”（GSW）的原因和抑制措施。该工作不仅创造了GS和MS的资源化利用，而且为GS合成硅酸钠提供了基础。此外，总结了实验过程中产生“芒硝”（GSW）的原因和抑制措施。该工作不仅创造了GS和MS的资源化利用，而且为GS合成硅酸钠提供了基础。