Continuous operation method for decomposition and classification production of alumina plant

The invention discloses a continuous operation method for decomposition and classification production of an alumina plant and belongs to the technical field of alumina production. The continuous operation method for decomposition and classification production of the alumina plant comprises the following steps: 1) connecting crystal seed pumps in a decomposition system in normal production by adopting a first pipeline, and conveying parts of crystal seed pumps in the decomposition system in normal production into a decomposition tank in the decomposition system halted for overhaul; 2) connecting mother solution pumps in the decomposition system in normal production by adopting a second pipeline, and conveying parts of mother solution pumps in the decomposition system in normal production into the decomposition tank in the decomposition system halted for overhaul; and 3) connecting a vertical plate filter in the decomposition system halted for overhaul by adopting a third pipeline, conveying aluminum hydroxide