Patent ID: 9499440
Filing Date: 2016-11-22
CPC Classification: C01F,C04B,C22B,C22C,Y02P,Y02W

Claim Text:
1. A disposal method for heavy metal waste gypsum, comprising the following steps: (1a) a step of smelting flux preparation wherein, in order (1b) returning the secondary heavy metal waste gypsum produced in the acid making system and further carrying out said smelting flux preparation described in steps (1a) partially substituting said secondary heavy metal waste gypsum for said dried heavy metal waste gypsum (2) sending dust comprising heavy metal produced in said heat treatment furnace to a heavy metal disposal system comprising lead smelting; said lead smelting comprising steps of ball milling and mixing into a lead smelting mixture the pre-sintering material of smelting flux obtained in steps (1a), additional smelting fluxes and raw material for lead smelting, (3) in a step of fuming, (4) a step of geopolymeric gelling, wherein: