Waste aluminum recycling and processing

Recycled aluminum is increasingly prominent in the production of aluminum in major developed countries. The ratio of primary aluminum to recycled aluminum in developed countries is close to or exceeds 1:1. For this reason, the recycling of waste Al has become a very important work of all countries in the world and has become an important industry.

However, the aluminum alloy Collection and recycling is a very complex technical work, use of a wide variety of aluminum products, the use of decentralized, focused on how to recycle, sort, come to realize the regeneration process and so is very complicated huge project. Secondly, there are hundreds of alloys with different alloy compositions and different properties in the world. Many of the alloys are mutually exclusive and incompatible with each other. How to make the waste Al regenerating component meet the ideal alloy requirements and performance in the easiest way, the lowest cost and the most effective process. The recycling technology with the quality can reach or close to the original material level is the pursuit goal of the world. .

    At present, developed countries have formed a complete collection, management and sorting system for waste aluminum, adapting to the expanding market demand, and developed countries are constantly introducing new technological innovations in production, such as low-cost continuous smelting and processing, making low The process of upgrading the grade waste aluminum, etc., the waste aluminum can be used to manufacture a large number of recycled aluminum ingots for casting, die casting, rolling and master alloy. The largest ingot weight is 13.5 tons, of which remelted secondary alloy ingots ( RSI) is used to make thin sheets for cans. The quality of the sheets has reduced the weight of each can to only about 14 grams. Some recycled aluminum is also used in the manufacture of computer floppy disk drives.

    However, the degree of conception and understanding of waste aluminum in China has not been deepened to the level of developed countries such as the United States and Japan. The largest and most reclaimed aluminum enterprise in Asia is Shanghai Xinge Nonferrous Metal Co., Ltd. located in the suburbs of Shanghai. The company, although the company has two sets of 50 tons of smelting static furnace, a group of 40 tons of fuel smelting static furnace; a 12-ton fuel rotary furnace, these 50-ton furnace is not only China's largest regenerative aluminum smelting furnace, but also Ranked among the largest regenerative aluminum smelting furnaces in Asia. However, at some level of loop measures and process technology, even if the level of Xinge Company is at the leading position in China, it still belongs to the level of foreign countries in the 1980s. As for some enterprises with small scale, low output and weak environmental protection measures, Most of them, technical transformation and environmental protection facilities can be said to be difficult to implement.

1. According to request it can do a single-stage and continuous cutting.