在烧结法氧化铝生产工艺中,为了保证产品质量,必须对粗液进行脱硅,而基于形成水合铝硅酸钠的脱硅路线,由于渣中硅含量高、铝损失少,是进行粗液第一步脱硅的必要步骤。烧结法氧化铝生产,采用粗液常压预脱硅—中压压煮脱硅—加石灰常压深度脱硅的三段脱硅工艺,对粗液一段常压预脱 In sintering alumina production process, in order to ensure product quality, the desiliconization must be carried out on the crude liquid. On the basis of the desiliconization route for forming hydrated sodium aluminosilicate, since the silicon content in the slag is high and the aluminum loss is small, The first step of desiliconization necessary steps. Sintering alumina production, the use of crude liquid pre-desiliconization - pressure boiled desiliconization - plus lime at atmospheric pressure deep desiliconization of the three stages of desalination of the crude liquid for a pre-off