According to reports, Gome has the following ways to recycle used household appliances: First, it is recycled in all stores under Gome; Second, promote the recycling of "used electrical appliances" through press conferences; Third, try to cooperate with home appliance manufacturers to promote, build recycling projects with waste electrical appliances recycling centers around the country, establish a licensed recycling network for waste electrical appliances, and fund the upgrading of licensed recycling outlets.
According to Wang Junzhou, general manager of Gome's South China region, Gome will invest a huge sum of money to establish a recycling business network covering the whole East China region, and then it will be launched nationwide.
It is reported that since the beginning of this year, it is estimated that about 4 million refrigerators, 5 million washing machines and 5 million televisions will be scrapped every year in China, and the number of computers scrapped every year will reach more than 5 million in the next five years to 10. At present, China has not yet established a standardized recycling system for used household appliances and electronic products, and a large number of household appliances are in extended service and disposed of at will. At the same time, as the main force of recycling, hawkers and some manufacturers and businesses engaged in "trade-in" spontaneously carried out under the drive of pure economic interests. Its disorderly recovery and primitive and backward dismantling treatment have caused serious waste of resources and environmental pollution.
The effective recycling of waste circuit boards has become a new topic related to the sustainable development of China's economy, society and environment and the recycling of renewable resources in China, which has attracted great attention of our government. "PCB recycling and harmless treatment technology" has been included in the national major industrial technology development project of comprehensive utilization of resources organized and implemented by the National Development and Reform Commission. According to reports, with the support of Beihang University, Hunan Wanrong Technology Co., Ltd. has made new progress in the field of "comprehensive utilization and disposal of waste circuit boards", independently innovated and developed complete sets of equipment and technology for comprehensive utilization and harmless disposal of waste circuit boards, and industrialized the technology, and built demonstration production lines in Guangdong and Jiangsu respectively.
At present, the recycling method of epoxy printed circuit board (PCB) waste is not suitable for environmental protection requirements. Experts say that printed circuit boards are made of glass fiber, epoxy resin and various metal compounds. If the waste circuit board is not handled properly, it will contain carcinogenic substances such as bromine flame retardants, which will cause serious pollution and harm to the environment and human health. But at the same time, waste circuit boards also have high economic value. The grade of metal in circuit board is dozens of times that of common minerals, and the metal content is as high as 10 ~ 60%. The most abundant is copper, in addition to gold, silver, nickel, tin, lead and other metals, among which there are many rare metals, while the rich metal content in nature is only 3 ~ 5%.
Data show that 1 ton computer components use an average of 0.9 kg of gold, 270 kg of plastic, 128.7 kg of copper, 1 kg of iron, 58.5 kg of lead, 39.6 kg of tin, 36 kg of nickel, 19.8 kg of antimony and precious metals such as palladium and platinum. It can be seen that the waste circuit board is also a "gold mine" to be developed. According to experts, according to the investigation of the status quo of waste circuit boards in most parts of the country, most of the waste circuit boards and frame materials produced by many circuit board enterprises are transported to remote areas for burning and washing, which has caused extremely serious secondary pollution. Among them, the incineration method has been banned by the State Environmental Protection Administration for a long time because it will produce a large number of odorous and toxic bromine compounds and seriously pollute the atmosphere. However, in remote mountainous areas, there is still room for survival in incineration workshops.
Water washing method is widely used because of its simple process and low investment. However, a large amount of waste residue (that is, "non-metallic substances", accounting for about 80% of the weight of printed circuit boards) produced after water washing is still very harmful to the environment, and these waste residues are difficult to treat or eliminate. Most washing enterprises bury waste residue as domestic garbage or hand it over to the sanitation department for treatment. Near Kunshan, Jiangsu Province, some small washing plants even pour waste residue directly into ponds, which are covered with a layer of soil. In a year or two, the pond was filled up and the surface was not polluted. In fact, this nonmetallic substance has long-term and far-reaching harm to groundwater quality and soil texture. None of these water washing plants have obtained the business license of the environmental protection department, which is completely illegal. The environmental protection department will close the door when it comes to check, and then start operating secretly after the inspection. There are hundreds of such washing plants in China, which deal with a large number of discarded printed circuit boards without taking any environmental protection measures at all. The industrial waste water produced is dumped at will, and the waste residue is piled up at will or buried in the open air, which does great harm to the environment and residents' health.
In order to regulate the disposal of industrial waste of waste household appliances and electronic products, governments at all levels in China have issued a large number of laws and regulations, promulgated Regulations on the Management of Recycling of Waste Household Appliances and Electronic Products, Measures for the Prevention and Control of Pollution in the Production of Electronic Information Products, Technical Policies for the Prevention and Control of Pollution of Waste Household Appliances and Electronic Products, and the draft Law on Recycling of Electronic Wastes, thus forming a relatively systematic legal system. Experts said that local governments also attach great importance to this. Guangdong Province has specially formulated the Regulations on the Prevention and Control of Environmental Pollution by Solid Wastes in Guangdong Province. In the List of Strictly Controlled Wastes in Guangdong Province published by Guangdong Environmental Protection Bureau, waste circuit boards and copper clad laminates are clearly classified as strictly controlled wastes (HY04), and open burning is prohibited. According to the above policy, waste circuit boards have long been included in the strict environmental protection scope of the state and provinces. However, due to the lack of reliable recycling technology, solid waste management centers all over the country can not effectively control and dispose of waste circuit boards, which leads to the recycling is still in a chaotic state and causes serious harm to the environment.
Hunan Wanrong Technology Co., Ltd. is a scientific and technological enterprise specializing in the comprehensive utilization and development of industrial wastes. Through cooperation with Beihang University and other related research institutes, comprehensive development research has been carried out in the field of "comprehensive utilization and treatment of waste circuit boards". On the basis of absorbing advanced recycling technology at home and abroad, we have independently innovated, successfully developed complete sets of equipment and technology for comprehensive utilization and harmless treatment of waste circuit boards, and industrialized this technology, and built a harmless comprehensive treatment production line and a demonstration production line for deep processing of nonmetallic materials in Guangdong and Jiangsu respectively. According to reports, in terms of metal deep processing generated by recycling, Wanrong Technology has cooperated with relevant mining and metallurgical research units to form a complete set of metal deep processing technology systems generated by recycling waste circuit boards.
The complete set of equipment and technology of "comprehensive utilization of waste circuit boards" developed by Hunan Wanrong Technology Co., Ltd. has systematic advantages, and has the following remarkable characteristics compared with other methods. Mainly in two aspects: first, the separation equipment of the system adopts the most advanced "all-physical technology" in the world to recover the rare and precious metals such as copper in the circuit board. Through special equipment treatment and separation process, the effective separation of metals and nonmetals is realized, and there is no waste water and waste residue discharge in the whole production process, which completely solves the serious secondary pollution problem caused by previous treatment methods such as incineration, acid leaching and water washing. The actual operation test shows that it has the characteristics of stable operation, high recovery rate, high degree of automation and good working environment. The metal recovery rate is stable above 95%, and the annual processing capacity of single wire can reach 500 tons, 3000 tons and 6000 tons respectively (different configurations can be provided according to the processing capacity).
Secondly, the comprehensive application of nonmetallic powder in the recycling of waste PCB boards has been well solved, and a complete "green recycling industry chain" has been constructed. The nonmetallic substances in the circuit board include brominated/epoxy resin, brominated/phenolic resin, insulating paper, polyimide, UV paint, glass fiber, flame retardant such as polybrominated diphenyl ether and other additives. , the composition is very complex, rich in dangerous substances. There is no successful scheme for the direct and comprehensive utilization of nonmetallic powder in the world. Generally, nonmetallic powder is treated simply: directly buried, burned and solidified. These simple treatment methods lead to the high cost of post-treatment of environmental governance and cannot be effectively promoted. The treatment technology innovatively realizes the direct material utilization of nonmetallic powder, truly achieves zero emission and no pollution, has lower treatment cost, and can obtain greater value from nonmetallic recovery. In addition, it can also effectively extract rare and precious metals such as gold, silver and palladium from metal powder, so that the value of rare and precious metals can be fully reflected.
According to experts, according to the distribution of domestic circuit board enterprises and the different characteristics of solid waste management systems in various places, the construction of circuit board recycling bases should be combined with various forms and rationally laid out. In some areas where PCB manufacturers are concentrated, such as Shenzhen, Dongguan, Suzhou, Kunshan and other places, there are more than 100 PCB enterprises, which produce tens of thousands of tons of PCB frame materials every year. In these areas, large-scale specialized recycling bases with an annual processing scale of 1 10,000 tons will be established, and nonmetallic materials application production lines will be built to create processing advantages with centralized, convenient and efficient recycling systems and large-scale production and processing methods. Due to the reduction of recycling links and the shortening of transportation turnover cycle, the whole process cost of circuit board waste from factory to processing value-added is greatly reduced. On the one hand, it ensures the profits of recycling enterprises, and also creates conditions for processing enterprises to set reasonable recycling prices, which is beneficial to waste-producing enterprises and realizes real market-oriented operation.
In some provinces and cities where circuit board enterprises are not concentrated, it is advisable to choose areas with suitable traffic and environment to establish centralized treatment points, or cooperate with electronic waste treatment centers or solid waste treatment centers in various provinces and cities. The construction of centralized treatment base in this area should be jointly established by enterprises with technical and financial advantages, local environmental protection enterprises or solid waste disposal centers, guided and supported by the government, and the mode of enterprise management and market operation should be implemented. Experts said that with the rapid development of the circuit board industry, it is moving towards mass production, and the environmental pollution caused by the circuit board industry has brought great pressure to the expansion of circuit board production enterprises. Undoubtedly, it is the best way for the circuit board industry to carry out clean production, reduce pollutant emissions and strengthen waste recycling. On the one hand, it can reduce the environmental pressure of enterprises and society, on the other hand, it can create new value for enterprises, reduce costs and improve efficiency. Enda Circuit Co., Ltd., located in Shenzhen, has become a model of clean production in the industry and a win-win situation for enterprises and society in the comprehensive recycling of copper-containing waste liquid. Guangdong Yi Sheng Technology Co., Ltd. is a leading copper clad laminate manufacturer in China. It has established a cooperative relationship with Wanrong Technology and actively explored the establishment of a recycling and value-added system for copper scrap.