Device for solidifying the surfaces of drops

摘要

This invention provides a device for solidifying the surfaces of drops, comprising an ammonia gas sprayer with ammonia gas-spraying nozzles, each spraying ammonia gas to each of paths along which drops of the feedstock liquid that includes uranyl nitrate fall to an aqueous ammonia solution stored in an aqueous ammonia solution reservoir, the drops being dripped from a dripping nozzle device wherein the dripping nozzle device comprises nozzles and the drops are dripped from the nozzles, and wherein the distance between the ends of the dripping nozzles and the ends of the ammonia gas spraying nozzles is from 10 mm to 40 mm, the shortest distance between the paths along which the drops dripped from the ends of the dripping nozzles fall and the ends of the ammonia gas spraying nozzles is from 3 mm to 15 mm, and the flow rate of the ammonia gas sprayed from the ammonia gas spraying nozzles is from 3 L/min to 25 L/min.