The utility model relates to the technical field of non-
ferrous metal hydrometallurgy leaching, in particular to a device for preparing
nickel sulfate solution through continuous leaching, which comprises a dissolving kettle, a water tank, a delivery pump prefilter, a delivery pump, a transfer kettle and a filter pressing pump, a supernatant pipeline is fixedly communicated between the dissolving kettle and the water tank, a
siphon pipeline is fixedly communicated between the supernatant pipeline and the conveying pump, a conveying pipeline is fixedly communicated between the conveying pump and the transfer kettle, and a
sediment filter pressing pipeline is fixedly communicated on the conveying pipeline; by arranging the dissolving kettle, the water tank and the
siphon pipeline, supernate in the dissolving kettle is continuously pumped into the transfer kettle according to the
siphon principle, mineral raw materials in the dissolving kettle are continuously leached through
continuous operation of cooperation of the double kettles, the continuous and efficient leaching effect is achieved, the production efficiency is improved, and the yield of valuable
metal is increased; and meanwhile, the delivery pump pre-filter is arranged to filter large-particle materials, so that the
failure rate of the delivery pump is greatly reduced, and the service life of the
system is prolonged.