Strengthen international exchanges and cooperation. Hand to introduce and absorb foreign new technology, new technology, new equipment, and promote renewable resource recycling enterprises of technological progress, improve resource utilization; on the other hand, the development of relevant incentives, increase investment in, and actively guide foreign renewable resources sector investment to encourage foreign investors to invest in renewable resources processing centers in China. Meanwhile aluminum recycling company, to establish extensive links with the Association of renewable resources in developed countries or regions of the world, the lessons they deal with economic development and resources, environmental issues and lessons in the industrialization process to join aluminum recycling, drawing its renewable resources sector management practices and related policies to improve the technical and management level of the entire industry. 2, alkali leaching with hot alkaline solution of tin dissolution process. Adding an oxidizing agent-containing solution NaOH180 ~ 200g L /, the leaching temperature is controlled at 353 ~ 363K aluminum recycling, tin tinplate surface generated stannate (Na2SnO4) dissolved out. Has been widely used in the past saltpeter (NaNO3) oxidant aluminum recycling project, is now gradually being nitrobenzoic acid (NO2C6H4COOH) and other organic oxidant instead. The latter has the advantage of oxidation speed, generating tetravalent tin ions, organic oxidant by oxygen in the air can be regenerated. Immersing the tinplate pieces loaded in the leaching tank apertured drum, tin will be dissolved in alkali solution continuously. Cedar leach solution containing 15g / L when to discharge, then CO2, NaHCO3, Ca (OH) 2 and the like H2SO4 precipitate tin. Tin-containing precipitate obtained by the reduction of metal tin; also available Na2S leachate purification after producing SnO2 compound; electrolytic deposition method can also be used directly to produce electricity tin. Tinplate treated tin 0.04%. Aluminum recycling plant _ East in mind renewable resources (certified) _ Gantry aluminum recycling by Dongguan Chang Ping Tung Kee provide renewable resource recycling. Dongguan Chang Ping Tung Kee renewable resource recycling (www.dongji8.com) is Dongguan, Guangdong, scrap recycling leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . Renewable resources in the East in mind the leadership of the staff warmly welcome all inquiries negotiations to create the East in mind a better future for renewable resources.