The recycling value of electronic waste and its prospects

With the rapid advancement of the global urbanization process, people's consumption levels are increasing, which in turn stimulates the upgrading of electronic products. While some people indulge in when "Amoy gold", more people have to face and bear the health and environmental problems caused by improper e-waste disposal together from a large number of obsolete electronic products.

First, what is e-waste? E-waste, as the name suggests, refers to electronic products that have been abandoned or can no longer be used. E-waste is mainly divided into: large household appliances (such as air conditioners, refrigerators), small household appliances (such as desk lamps, vacuum cleaners), office equipment (such as computers, printers), electronic entertainment products (such as televisions, stereos), lighting equipment ( Mainly refers to light bulbs and light pipes), medical equipment and equipment monitoring equipment self-service terminals (such as automatic ticket vending machines). At present, China has become a major producer and consumer of electrical and electronic products, and many products have reached the peak of phase-out. According to the data of the 2006 China Statistical Yearbook, the social security of China's major electrical and electronic products in 2006 was about 490 million TV sets, about 220 million refrigerators, and about 260 million washing machines. It is 150 million units and the number of computers is about 80 million units, a total of 1.2 billion units. In 2006, the actual waste of these five products was about 4.6 million TV sets, about 2.1 million refrigerators, about 2.5 million washing machines, about 1.4 million air conditioners, and about 2 million computers. 12.6 million units. In addition, a large number of mobile phones, copiers, fax machines, printers and other electronic products are scrapped every year. At present, there are three main flows of waste electrical and electronic products in China: First, through the small-scale traders who go to the streets and alleys to recycle or through the “old-for-new” of manufacturers and sellers, they will flow into the old goods market and sell them to low-end consumers. The second is to transfer to specific regions and groups such as the western region and the Hope Primary School through donations. The third is to disassemble, process, and extract raw materials such as precious metals.

Second, e-waste is a treasure, but also a curse. There are many useful resources in e-waste, which is known as the main “mineral resource” in the future. Such as copper , aluminum , iron and various rare metals, glass and plastics, etc., with high re-use value, the cost of obtaining resources through regeneration is much lower than the cost of directly obtaining resources from smelting and processing such as ore and raw materials, and saving energy. Taking computers as an example, steel accounts for about 54%, copper and aluminum 20%, plastics 17%, circuit boards and other 1%, while circuit boards contain precious metals such as gold, silver and palladium . Houba Village, which is less than 3 kilometers away from Zhongguancun Street in Beijing, is known as the largest e-waste “transfer station” in Beijing. There is a very vivid statement about how many new computers can be sold in Zhongguancun, and how many old computers can be recycled here. According to statistics, 1 ton of waste circuit boards can be separated from 286 pounds of copper, 1 pound of gold, and 44 pounds of tin . The value is up to 6,000 dollars, plus iron, aluminum, cadmium , nickel, etc., and the value may reach 7,000 US dollars.

Third, it is the value of e-waste that is valued. People start to use the waste electrical appliances to make money. Guiyu Town, Shantou City, Guangdong Province, is known as the world's largest e-waste dismantling base, which is rich through e-waste. Among the 28 villages in Guiyu, 21 villages and more than 80% of families directly participated in this work. They formed hundreds of family e-waste dismantling workshops and absorbed tens of thousands of jobs from all over the country. Come here. Relevant data show that these workers can decompose 1.5 million tons of e-waste each year. Due to the existence of a large number of individual handicraft workshops for dismantling and disposing of waste electrical and electronic products, in order to pursue short-term benefits, precious metals such as open burning, strong acid immersion, etc. are used to extract precious metals, and exhaust gas, waste liquid and waste residue are arbitrarily discharged to the atmosphere, soil and water bodies. It causes serious pollution and thus harms the health of the human body. Although e-waste brings huge profits to people, it is at the expense of health. Among the foreign population in Guiyu, 88% suffer from diseases such as skin diseases, nervous system, respiratory system or digestive system. Some scholars have gone deep into Guiyu Town for medical investigations in five years. The results show that in Guiyu, the lead content in children, the levels of dioxins and other organic pollutants in the human body are much higher than others. area. Once heavy metals such as lead are present in the human body, they can cause damage to the central nervous system, etc. This kind of harm is fatal. The original e-waste contains large amounts of lead, cadmium, mercury, hexavalent chromium, PVC, brominated flame retardants and other harmful substances. Taking the computer display as an example, the lead content accounts for 6% of the weight of the entire display screen, and after the lead element enters the human body, most of it is excreted in the body, and most of it is dissolved in the blood, hindering the synthesis of blood, leading to anemia of the human body. Symptoms such as headache, dizziness, fatigue, drowsiness, constipation and limb aches, diseases such as arteriosclerosis and peptic ulcer are also associated with lead poisoning, and lead is more harmful to children. People can't see the harm to the body at once, so it's easy to be numb.

Fourth, the lack of raw materials, recycling is a side of the private waste recycling of the "guerrillas" active in the streets and lanes, free to dispose of e-waste; on the other side of the formal e-waste processing enterprises because they can not get enough raw materials and long-term "eat not enough" situation. On February 25 this year, the State Council issued the Regulations on the Management of the Recycling of Waste Electrical and Electronic Products (hereinafter referred to as the Regulations). Although the regulations will come into effect on January 1, 2011, let us see the spring of the regulation of the electronic waste market. In view of the fact that China does not form a professional centralized recycling, processing, processing and other related systems for electronic waste, the country has identified a demonstration project for the disposal of used household appliances in four cities including Beijing, Tianjin, Qingdao and Hangzhou. Active exploration was carried out. According to industry insiders, standardizing the electronic waste recycling system not only can protect the interests of producers and consumers, prevent and reduce environmental pollution, safeguard human health, promote comprehensive utilization of resources, and overcome the constraints of resource shortage on China's economic development. To a certain extent, it will also be conducive to the smooth progress of urbanization for sustainable development in China.

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