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Process for reclaiming lead and producing environment-friendly building material by waste flint glass and corollary equipment thereof

A technology of supporting equipment and glass, applied in the field of environmental protection and comprehensive utilization of resources, can solve the problems of polluted soil and groundwater, heavy metal hazards, etc.

Inactive Publication Date: 2009-12-30
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

Lead glass is mostly used in home appliances. At present, the focus of recycling electronic waste resources is mainly on the recovery of precious metals and valuable metals, while glass parts with low added value are often discarded and piled up, resulting in a large amount of waste lead-containing glass piled up like a mountain. Lead and other heavy metals are dissolved with rainwater, polluting soil and groundwater
In recent years, there have been reports of sintered glass ceramics obtained by mixing waste lead glass with certain industrial wastes, grinding them into powder, and sintering them. However, this method of utilization only transfers heavy metals such as lead in the glass from one product to another. problem is not resolved

Method used

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  • Process for reclaiming lead and producing environment-friendly building material by waste flint glass and corollary equipment thereof
  • Process for reclaiming lead and producing environment-friendly building material by waste flint glass and corollary equipment thereof
  • Process for reclaiming lead and producing environment-friendly building material by waste flint glass and corollary equipment thereof

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Embodiment Construction

[0007] Material pretreatment part: use waste lead-containing glass as raw material, first use mechanical crushing method to crush the glass to about 1-3 cm, and then use planetary ball mill to further crush it to a particle size of less than 100 mesh, and dry it at 105°C for 24 hours for later use.

[0008] Vacuum carbothermal reduction part: Weigh a certain amount of lead-containing glass powder, add carbon powder ( figure 2 As shown, the quartz tube is directly inserted into the tubular resistance furnace, connected to the vacuum system and pumped to 10Pa; the temperature rise program is: 30°C / min to 400°C, then 10°C / min to 1000°C, keep for 2 hours, take out the quartz The tube was kept under vacuum and after cooling to room temperature the sample was removed and weighed. After collecting metallic lead, the calculated recovery rate is 99.32%, and the foaming condition of the residue observed by scanning electron microscope is shown in image 3 , Toxicity leaching experiment ...

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Abstract

The invention establishes a vacuum carbon thermal reduction process applied in high added value and resource recycling of waste flint glass, and optimizes corollary equipment, direct to the current situations of serious environment pollution and resource recycling technology of the waste flint glass. The process has the characteristic that while reclaiming lead in the waste flint glass, the rest glass residue is formed into a good-quality environment-friendly building material through controlling conditions. Results of toxicity extraction experiments prove that extraction amount of lead and other heavy metals in a product is lower than the reference value of national regulation, and can be used as a light environment-friendly building material.

Description

technical field [0001] The invention relates to resource utilization and pollution control technology of waste lead-containing glass, belongs to the technical field of environmental protection and resource comprehensive utilization, and is especially suitable for resource utilization of lead-containing hazardous solid waste. Background technique [0002] The hazards of lead have attracted widespread attention over the years. Japan and western countries have enacted a series of relevant laws to limit the use and discharge of lead. Lead can accumulate in the body and cause lead poisoning. The effect of lead poisoning is quite slow and the toxicity is hidden, and it is not easy to be detected before the toxicity appears. my country has promulgated discharge standards for lead-containing sewage in nonferrous metals, petroleum, textile, sulfuric acid and other industries. With the continuous development of technology, lead standards for household products are also being continu...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B13/02C22B5/10C03C11/00C03B19/08
CPCY02P10/20
Inventor 张付申陈梦君吴建芝
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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