There are various chips, capacitors, polar tubes and other parts on the waste circuit board, which can be recycled. At the same time, there are gold-plated, tin solder, copper skeleton and other metals. The recycling of waste circuit boards is mainly concentrated in the Beilin area. The main process of recycling is as follows:
Process A: Recycle all kinds of chips, capacitors and tubes. (Mainly in Beilin, as well as some locations in Nanyang and Huamei)
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Step 1: Heating: Put the circuit board on the coal stove and heat it until it softens;
The second step: extraction: extraction of various chips, as well as capacitors, electrodes and other electronic components;
Step 3: Classification: Classification of various chips and electronic components;
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Flow and use: transfer of Shenzhen, Dongguan electrical equipment factory, directly used in the production of new products;
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Step B: Extract solder. (Mainly in Beilin, as well as some locations in Nanyang and Huamei)
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Step 4: Heating: The circuit board that has been removed of various chips and electronic components is placed on the furnace separated by an iron plate or a pan to continue heating. The solder, such as tin, melts and drops onto a pan or iron plate, where it is collected and melted and sold.
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Process C: Gold extraction: (mainly in the countryside, currently this type of production is extremely hidden)
Step 5: Acid bath: Various things on the circuit board have been removed, such as gold-plated parts on the circuit board, then put it into a strong acid solution;
Step 6: Reduction: the gold in the strong acid is reduced to low-purity gold;
Step 7: Heating refining: the low-purity gold is further purified to make higher-purity gold;
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Direction and use: Sale for industrial gold.
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Process: Extraction of copper. (Collected and shipped to Qingyuan for smelting)
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Step 8: Collection: Collect a variety of copper-containing circuit boards that have been stripped of all attachments;
Step 9: Transfer and smelting: transfer to Qingyuan blast furnace smelting, smelting into low-quality copper alloy;
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Direction and use: Sold to smelters in Zhuzhou and other places for separation, smelting and purification.
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Recycling of waste wires
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The disassembled appliances can sort out a lot of old wires. Waste wire can be divided into thick wire (cable) and thin wire two kinds. For thick wires, a special metal knife is usually used to cut the copper and other metals inside, and the insulator on the outside of the wire is recycled as plastic. Thin wires can only be incinerated to extract copper and other metals (usually shipped to Qingyuan along with copper-containing circuit boards for smelting). Plastic insulation is sold to family workshops and small and medium-sized processing plants that specialize in recycling plastics. The flow of extracted metal has three, one is the smelter in Zhuzhou and other places, the second is sold to Jiangsu, Zhejiang and Fujian and other places, and the third is the local metal processing plant