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

A co-processing and lead smelting technology, applied in the direction of improving process efficiency, can solve the problems of heavy metal pollution, waste of lead resources, etc., and achieve the effects of avoiding waste, improving recovery rate, and solving heavy metal pollution

Inactive Publication Date: 2018-06-12
岷山环能高科股份公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention provides a method for co-processing waste lead-containing glass in lead smelting, which not only avoids the waste of lead resources, but also solves the problem of heavy metal pollution

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

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Embodiment

[0034] What needs to be understood is that the main components of leaded glass are lead oxide and other silicates. In view of the fact that quartz sand needs to be added to the bottom blowing furnace to make slag during the melting process, leaded glass can be added as a "solvent", and after melting and slagging reaction Then flow into the reduction furnace for reduction smelting. In the bottom-blown furnace, PbO participates in bottom-blown smelting to produce primary lead, SiO 2 Participate in slagging reaction, the reaction formula is as follows:

[0035] 2PbO+PbS=3Pb+SO 2

[0036] xPbO+ySiO 2 =xPbO·ySiO 2

[0037] FeO+SiO 2 =FeO·SiO 2

[0038] CaO+SiO 2 =CaO·SiO 2

[0039] In the reduction furnace, lead silicate and lead ferrite react with C / CO to produce secondary crude lead. The reaction formula is as follows:

[0040] 2PbO SiO 2 +2FeO+C=2Pb+2FeO·SiO 2 +CO 2

[0041] 2PbO SiO 2 +2CaO+C=2Pb+2CaO·SiO 2 +CO 2

[0042] In summary, from the analysis of th...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B13/02C22B19/30C22B19/34
CPCC22B7/001C22B13/025C22B19/30C22B19/34Y02P10/20
Inventor 郭朋辉韩志杰何志刚何志军何占源
Owner 岷山环能高科股份公司
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