Waste LED lighting bulb recycling method

A technology of LED lighting and recycling method, which is applied in photography technology, equipment, photography auxiliary technology, etc., can solve problems such as waste of resources, achieve high recycling efficiency, improve recycling efficiency, and have good compatibility in comprehensive utilization

Active Publication Date: 2017-02-08
DELTA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the present invention provides a method for recycling waste LED lighting bulbs, which effectively solves the problem of waste of resources in existing recycling methods

Method used

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  • Waste LED lighting bulb recycling method
  • Waste LED lighting bulb recycling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Waste LED lighting bulbs are roughly broken, squeezed and broken, and plastic shells are obtained by screening, magnetic separation and air separation (recycled after cleaning, including PC (Polycarbonate, polycarbonate / PBT (Polybutylene Terephthalate, polyparaphenylene) Butylene glycol diformate), etc.), heat-dissipating aluminum sheets, LED chips and circuit boards. The circuit boards are placed in a tinning furnace at a temperature of 250°C for 15s, and the melted metal tin is recovered. Stripping electronic components The final bare board and LED chips are cut into 1-5cm size by shearing and then melted in the smelting furnace, blown into air and coal powder, and the smelting temperature is 1200°C. Among them, the organic matter in the bare board provides energy and reduces dust. The amount of coal added. After smelting, black copper, smelting slag and soot are obtained. Due to the difference in the physical and chemical properties of each metal, copper is used as a ...

Embodiment 2

[0065] Waste LED lighting bulbs are roughly crushed, squeezed and broken, and then screened, magnetically separated and air-separated to obtain plastic shells (recycled after cleaning, including PC / PBT, etc.), heat-dissipating aluminum sheets, LED chips and circuit boards. . The circuit board is placed in a tin ironing furnace at a temperature of 300°C for 10 seconds. The melted metal tin is recovered, and the bare board and LED chip after stripping off the electronic components are cut and broken (cut into 1~5cm size) and then enter The smelting furnace is smelted, air and pulverized coal are blown in, and the smelting temperature is 1250 ° C. Among them, the organic matter in the bare plate provides energy and reduces the amount of pulverized coal added. After smelting, black copper, smelting slag and soot are obtained. Due to the different physical and chemical properties of each metal, copper is used as a precious metal collector to form a copper alloy containing gold, sil...

Embodiment 3

[0067]Waste LED lighting bulbs are roughly crushed, squeezed and broken, and then screened, magnetically separated and air-separated to obtain plastic shells (recycled after cleaning, including PC / PBT, etc.), heat-dissipating aluminum sheets, LED chips and circuit boards. . The circuit board is placed in a tin ironing furnace at a temperature of 350°C for 5 seconds. The melted metal tin is recovered, and the bare board and LED chip after stripping off the electronic components are cut and broken (cut into 1~5cm size) and then enter The smelting furnace is smelted, air and pulverized coal are blown in, and the smelting temperature is 1300 ° C. Among them, the organic matter in the bare plate provides energy and reduces the amount of pulverized coal added. After smelting, black copper, smelting slag and soot are obtained. Due to the different physical and chemical properties of each metal, copper is used as a precious metal collector to form a copper alloy containing gold, silve...

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Abstract

The invention provides a waste LED lighting bulb recycling method comprising the steps of treating waste LED lighting bulbs to obtain plastic shells, heat radiating aluminum sheets, LED chips and circuit boards, and recycling the plastic shells and the heat radiating aluminum sheets; stripping electronic components on the circuit boards, and recovering metal tin to obtain bare boards; smelting the LED chips and the bare boards to obtain black copper, smelting slag and sooth; treating the black copper to realize the separation and purification of metal copper, silver, gold, platinum and palladium; treating the smelting slag to realize extraction separation of yttrium oxide, gadolinium oxide and cerium oxide; and treating the soot to realize extraction separation of single high-purity indium oxide and gallium oxide. By using the waste LED lighting bulb recycling method, the aim of completely recycling metals in the waste LED lighting bulbs is effectively realized; and the waste LED lighting bulb recycling method is high in recycling efficiency, good in comprehensive utilization compatibility and suitable for industrial production.

Description

technical field [0001] The invention relates to the field of resource recycling, in particular to a method for recycling waste LED lighting bulbs. Background technique [0002] Due to the characteristics of LEDs such as small size, low energy consumption, long service life, high brightness, energy saving, environmental protection, and durability, LED bulbs have been widely promoted and applied, and have the tendency to replace ordinary energy-saving lamps. In this way, LED bulbs that are scrapped are also produced one after another. Generally speaking, the structure of LED bulbs includes plastic lampshades, LED chips, aluminum heat sinks, nickel-plated lamp holders and control circuit boards, which contain a large amount of metal resources, including rare and precious metals (gold, silver, etc.) , platinum and palladium), copper and rare earth elements (yttrium, gallium and cerium), etc. If it is directly discarded with domestic garbage after being discarded, it will not on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B25/06C22B15/00C22B11/00C22B59/00C22B58/00C25C1/12C25C1/20C22B13/02
CPCC22B7/001C22B7/007C22B11/046C22B13/025C22B15/0026C22B25/06C22B58/00C22B59/00C25C1/12C25C1/20Y02P10/20
Inventor 刘虎王立饶郑刚田婷芳舒龙龙章少华
Owner DELTA ALUMINUM IND
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