| abstract |
The invention discloses a process method for producing aluminum hydroxide by seed decomposition of supersaturated sodium aluminate solution. Local stirring is carried out at the bottom of a seed decomposition tank with the stirring strength being capable of keeping aluminium hydroxide particles at the bottom of the seed decomposition tank at a suspension state, so that sodium aluminate solution with high solid content and high molecular ratio, at the bottom of the seed decomposition tank, can be diffused and subjected to mass transfer, and the aluminium hydroxide particles at the bottom of the seed decomposition tank can not deposit. The process method disclosed by the invention breaks through a conventional process line requiring full-mixed-flow stirring in the seed decomposition process, provides a new process method including local stirring and plug flow, and has the characteristics of good energy-saving and consumption-reducing effects, high decomposing output rate, good product quality and the like. |