Method for coordinated disposal of waste lead-containing glass through lead smelting

Abstract

The invention discloses a method for coordinated disposal of waste lead-containing glass through lead smelting. The method includes the following steps of pretreatment, burdening, oxidizing smelting,reducing smelting and fuming smelting, wherein during pretreatment, a composite glass breaker is used for breaking the lead-containing glass; during burdening, ore powder, auxiliary materials and thewaste lead-containing glass are matched according to the mass proportion of 80-95: 3-15: 2-5, and are prepared into a mixed ball material through a cylinder granulator, and according to slag type control, FeO / SiO2=1.5-2.2, CaO / SiO2= 0.4-1.0, FeO / ZnO=1.1-1.3, S is controlled 15-18% or so, and the silicate degree is 0.8 or so; during oxidizing smelting, the mixed ball material is thrown into a bottom blowing furnace to be subjected to oxidizing smelting, and primary wet lead, high-lead slag and bottom blowing soot are obtained; during reducing smelting, the high-lead slag flows into a reducing furnace to be subjected to reducing smelting, and secondary wet lead, reduced slag and reduced soot are obtained; and during fuming smelting, the reduced slag flows into a fuming furnace to be subjected to fuming smelting, and water quenched slag and zinc oxide are obtained. The method for coordinated disposal of the waste lead-containing glass through lead smelting avoids waste of lead resources and solves the heavy metal pollution problem.

Description

technical field

[0001] The invention relates to the field of industrial waste treatment, in particular to a method for co-processing waste lead-containing glass in lead smelting. Background technique

[0002] Leaded glass refers to the glass containing SiO 2 PbO and other glass formers and glass with a relatively high content of PbO are mostly used in the manufacture of optical glass, electric vacuum glass, low-temperature sealing glass, radiation-proof glass, high-refraction bead glass and art glass and other products. Cathode ray tube (CRT), as an important leaded glass product, is widely used in electronic and electrical equipment such as televisions, computer monitors and oscilloscopes. The glass of CRT display contains a large amount of PbO and many harmful chemical components, such as: 53.05% SiO 2 , 18.27% PbO, 3.47% Al 2 o 3 , 2.35% CaO, 1.9% BaO and 0.97% MgO (by mass fraction). Especially in the glass of the funnel part, the lead content is as high as 20% to 4...

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