前言近年来某厂烧结法赤泥洗涤流程改变以后,Al_2O_3和 Na_2O 净溶出率都有所下降,并多次出现赤泥膨胀现象。为预防该现象的发生,沉降槽底流往往偏大,因而附损也大。为此,迫切需要研究该厂熟料在新流程溶出洗涤过程中的变化,探讨其原因并提出相应措施。X 射线衍射分析发现,该厂熟料中 C_2S 以α′-C_2S 为主。据文献介绍,在低浓度铝酸钠溶液中α′-C_2S 较β-C_2S 易于分解并生成不同的 Preface In recent years, the sintering process of a red mud cleaning process after the change, the net dissolution rate of Al 2 O 3 and Na 2 O have declined, and many red mud expansion phenomenon. In order to prevent the occurrence of this phenomenon, sedimentation tank inflow tends to be large, so the attachment loss is also large. Therefore, there is an urgent need to study the changes of clinker in the new process during the dissolution and washing process, discuss the reasons and propose corresponding measures. X-ray diffraction analysis found that the plant clinker C_2S α’-C_2S dominated. According to the literature, α’-C 2 S in low concentration sodium aluminate solution is easier to decompose than β-C 2 S and produce different