Method for recovering and processing discarded fluorescent lamp

A technology for recycling and processing fluorescent lamps, which is applied in glass recycling, recycling technology, electronic waste recycling, etc. It can solve the problems of different forms, waste of resources, and inability to completely remove pollution sources, so as to avoid treatment, simplify processes, and process methods. and economical effect

Inactive Publication Date: 2008-03-26
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, there is a small amount of gas in the tube, usually Ar gas. Although the amount of toxic mercury is small, it is ubiquitous in these parts and exists in different forms.
[0005] Judging from the existing waste light source separation technology at home and

Method used

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  • Method for recovering and processing discarded fluorescent lamp
  • Method for recovering and processing discarded fluorescent lamp

Examples

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Example Embodiment

[0033] Example 1:

[0034] In the following, a recycling example of the present invention will be described in detail with reference to the process in Figure 1. The discarded fluorescent lamps processed are all 40W T12 straight tube household lighting fluorescent lamps, each tube contains 20-40mg mercury and 4.5g tri-color phosphors. , Its basic composition is 60% Y 2 O 3 :Eu 3+ , 30% Ce 0.67 Mg 0.33 Al 11 O 19 :Tb 3+ , 10% BaMgAl 16 O 27 :Eu 2+ . The glass tube material is mainly made of Na 2 SiO 3 , CaSiO 3 , SiO 2 And a small amount of PbO; end metal parts: generally composed of Al caps, brass plugs, Cu-Ni alloy wires and polyacrylate insulators; the filament is usually tungsten wire.

[0035] 1) Clean the surface of the collected waste fluorescent lamp with decontamination powder, sodium hydroxide solution (2~3mol / L), nitric acid solution (2mol / L), and tap water to remove oil stains. After drying, use a cutting machine to cut off the non-glass part of the end of the lamp, and ...

Example Embodiment

[0043] Example 2:

[0044] Other content and operation are the same as in Example 1, the difference is: in step one, the recovery of gaseous mercury in the cutting process is completed in 25% acetone solution; in step 4) the starting chlorination temperature is 350°C, but the chlorination It takes a little longer to recover each component; in step 5), the glass and phosphor are mixed and recovered, the roasting temperature is controlled at 950℃, the reaction time is 90 minutes, and the control temperatures of the corresponding recovery furnaces 2, 3, 4, and 5 are reduced respectively. It is about 800°C, 700°C, 600°C, and 400°C. Under these conditions, the recovery treatment effect as in Example 1 can also be achieved.

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Abstract

This invention relates to a method for recovering and processing waste fluorescent lamps of straight fluorescent lamps, energy-saving lamps and rare earth three-basic color lamps including: safely cutting a waste fluorescent lamp to recover gas Hg, recovering Al caps, brass bolts, filament metals and adhesive Hg, recovering Hg in relaxed fluorescent powder and separating and recovering rare earth elements and other valuable elements from fluorescent powder by fire and recovering Hg and rare earth elements in the glass and adhered powder by a fire method, which applies one time of fire method to recover and separate Hg, rare earth and other valuable elements in fluorescent powder and the special recovery reaction bake oven includes a master reaction oven and several ovens controlling temperature independently.

Description

Technical field: [0001] The invention relates to a method for recovering waste fluorescent lamps including high-efficiency straight-tube fluorescent lamps for daily lighting, energy-saving lamps, and rare-earth three-color fluorescent lamps, and belongs to the recycling and processing technology of solid waste. Background technique: [0002] As people's awareness of energy conservation and environmental protection continues to increase, high-efficiency straight tube fluorescent lamps, energy-saving lamps, and rare-earth three-color fluorescent lamps have gradually replaced traditional incandescent lamps and become the largest light source for lighting. However, because fluorescent lamps use mercury as an active active ingredient, different manufacturers and different types of lamp tubes in different manufacturing years contain varying amounts of mercury vapor or solid mercury compounds (such as an ordinary 40W fluorescent tube (T12) about Mercury 41mg, T8 type contains at le...

Claims

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Application Information

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IPC IPC(8): H01J9/52H01J9/50
CPCY02W30/60Y02W30/82
Inventor 孙艳辉南俊民
Owner SOUTH CHINA NORMAL UNIVERSITY
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