The present invention relates to a method for compounding
solid reticular black porcelain
sunlight absorbing layer on
ceramic solar plate, wherein,
industrial waste residues and
metal minerals rich in the transition elements in fourth period are used as main raw materials to be ground into
slurry; the
slurry is sprayed on the dry surface of a
green body of a hollow
ceramic solar plate through
compressed air by adopting a single spray gun or a plurality of spray guns; the pressure and the flow rate of the
compressed air and the proportion of the
slurry are controlled, so as to lead
fog drops in initial contact with the dry
green body surface of the
ceramic solar plate to form mud particles which have a certain strength, are relatively dry and adhere to the surface of the
green body plate because of the fast water absorption of the dry green body and the
surface tension of the
fog drops; the subsequently sprayed
fog drops first meet the mud particles which have a certain
moisture absorption ability and protrude from the surface, and then the fog drops adhere to the mud particles, thus the heteropic incontinuous fog drop mud accumulation bodies which are in columnar shapes, steeple shapes, vertical wall shapes,
honeycomb shapes or porous shapes, have
moisture absorbed and have a certain strength are accumulated in turn; spraying is stopped before the
solid accumulation bodies reach to a certain height and lose
moisture absorption ability, thereby getting a
solid reticular black porcelain green body layer on the surface of the hollow ceramic solar green body plate; the hollow ceramic green body plate having the solid reticular black porcelain green body layer is dried and fired under high temperature; the firing temperature and time are controlled to ensure that the solid reticular black porcelain green body layer and the green body of a hollow ceramic solar plate are simultaneously sintered into a solid reticular black porcelain layer and a porcelain hollow solar.