一、前言在氧化铝分解后的过滤母液中所含浮游物是纯度很高的细颗粒氢氧化铝。当母液带着该浮游物重新返回生产流程去蒸发时,其部分浮游物会在原液槽中沉淀下来,堵塞蒸发器进料管道;另部分未沉淀的浮游物,在蒸发器进料效的加热管壁上沉积,并与其它物质(如硅、铁、钙等)形成结疤,致使蒸发器效率大为降低,汽耗亦随之增大。目前,在国内拜耳法氧化铝生产中采用倒效操作生产流程,虽能使蒸 I. INTRODUCTION Float contained in the filtered mother liquor after the decomposition of alumina is fine-grained aluminum hydroxide of high purity. When the mother liquor with the float to return to the production process to evaporate, part of the floats will precipitate in the liquid tank, blocking the evaporator feed pipe; the other part of the sediment floating in the evaporator feed heating Tube wall deposition, and with other substances (such as silicon, iron, calcium, etc.) the formation of scarring, resulting in a greatly reduced evaporator efficiency, steam consumption also increases. At present, in the domestic production of Bayer alumina production using inverted operation of the production process, although steaming