Waste aluminum is cheaper than 3,000 yuan, and the good ones range from 9,000 yuan. If it is aluminum ash, the aluminum content is only a few hundred dollars; What are the main commodities; The price of waste aluminum fluctuates every day.
Pretreatment intention of waste aluminum
Firstly, other metals and impurities doped in waste aluminum are removed,
Secondly, the waste aluminum is classified according to its composition, so that the alloy components in it can be used to the maximum extent.
Third, deal with oil, oxide and paint on the surface of waste aluminum. At the end of pretreatment, the waste aluminum is treated into a charge suitable for furnace conditions, and the fourth is to make the most economical and reasonable use of aluminum (including alumina) guessed by aluminum-containing waste.
Extended data:
dense medium separation
That is, heavy nonferrous metals such as copper whose density is higher than that of aluminum are separated by gravity in heavy medium, and waste aluminum floats on the medium and heavy nonferrous metals sink to the bottom by using the principle that the density of aluminum is lower than other heavy nonferrous metals, thus achieving the purpose of separation.
But the key of the technology is to choose the medium whose density is greater than aluminum and less than copper. This medium must be a fluid, not water or other liquids. When working, the fluid reciprocates, and the waste aluminum floats on the medium and is separated.
Parabolic beneficiation
Based on the principle that objects with basically the same volume fall at different points when being thrown by the same force, various waste nonferrous metals with different densities can be separated from waste aluminum. When the same force is used to shoot objects with different densities and basically the same volume along a straight line, all kinds of objects move in parabolic direction and have different landing points when landing.
The simplest experiment can be carried out on a horizontal conveyor belt. When the mixed waste aluminum runs at high speed with the conveyor belt and reaches the end point, the waste aluminum is thrown out in a straight line. Because of the different specific gravity of various wastes, they fall to the ground at different points, thus achieving the purpose of separating waste aluminum.
The method can uniformly separate waste aluminum, copper, lead and other wastes. The equipment manufactured according to this principle has been adopted abroad and is in the research stage at home.