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本文首先介紹諸研究者对有关鋁酸盐—碱液脫硅过程中析出的硅渣组成的研究結果。由于洗滌条件不尽相同,得出的结果也各异。本文作者采用化学純苛性纳或苛性钾、高純铝屑和化学純无水硅酸来制备試驗溶液,在規定的条件下进行脫硅,用化学法、X射綫照像和結晶光学法研究了析出的硅渣。結果确认,純铝酸钾溶液在173—250℃下脫硅时,生成构硅渣是由人造沸石核和鋁酸鉀化合产物組成的含水铝硅酸鉀;純鋁酸钠溶液脱硅时,生成的硅渣是由人造沸石核和铝酸鈉化合产物組成的含水鋁硅酸钠。硅渣的含水量取决于脫硅温度,并随温度的增高而下降。
This paper first introduces the results of the researches on the composition of silicon slag precipitated during the desalination of aluminate-alkali solution. Due to different washing conditions, the results obtained are also different. The authors prepared test solutions using chemically pure caustic soda or caustic potash, high purity aluminum shavings and chemically pure anhydrous silicic acid, desilication under defined conditions, and chemical, X-ray and crystallographic methods The precipitated silicon residue. The results confirmed that the pure potassium aluminate solution at 173-250 ° C desilication, the generation of silicon residue is composed of artificial zeolite nuclei and potassium aluminate compound hydrated potassium aluminosilicate; sodium aluminate solution desilication, The resulting silicon slag is a hydrous sodium aluminosilicate composed of a synthetic zeolite nucleus and a sodium aluminate compound. The moisture content of silicon slag depends on the desiliconization temperature and decreases with increasing temperature.