When I was a child, I always saw scrap, scrap copper, scrap iron, scrap aluminum. These lines let's open the mouth. But have you ever thought about such a problem, how to recycle tens of thousands of tons of waste aluminum? Rare earths are added to the recycling process. Why?
Recycling waste aluminum is not a simple matter. Although they are called waste aluminum, the types of waste aluminum are not the same, such as smallpox aluminum and aluminum foil and so on. There are generally two types from the source, one is production waste aluminum, and the other is domestic waste aluminum. Production waste aluminum, called new waste aluminum, is the factory processing produced unqualified waste 39bet-xsmb-xổ số tây ninh-xổ số binh phước-xổ số binh dương-xổ số đồng nai. And life waste aluminum, also known as old waste aluminum, is the waste aluminum produced in our lives. Different waste aluminum has different aluminum content, and there are all kinds of impurities, such as steel that we are familiar with and some steel accessories that are decorated, so these aluminum is not clean and can not be used as pure aluminum again.
So what to do? Then we can only make aluminum alloys. After making aluminum alloys, we can make all kinds of appliances used in our daily life and come back to our side. Aluminum alloy, as the name suggests, is aluminum mixed with other metal elements.
But making aluminum is not that simple. The first step is to sort it. We first have to screen out pure aluminum from these waste aluminum, and then is to screen cast aluminum alloy, deformed aluminum alloy and there are a lot of impurities in the mixture and so on. Therefore, when recycling aluminum, because the purity of aluminum is not the same, the corresponding recycling price is also different.
At this step, we need to screen out all kinds of steel and other accessories on the waste aluminum and reclassify them. At some of the larger aluminum recycling plants, computers are used for processing. For the amount of waste aluminum, chemical composition and so on file management, finally calculate we want to make aluminum alloy when the various material formula, the production of different uses of aluminum alloy. Because the use of aluminum alloy is not the same, the proportion of various other metal elements added is not the same, which is not the same proportion is our material formula.
Here friends may ask, what should we do after we have been screened? Then break them up and make a uniform aluminum scrap. This time the scrap aluminum will look very neat.
In fact, it is not neat enough, because there are various colors of paint and so on, so here aluminum can not make aluminum alloy. We need to remove these metal paints by physical grinding and chemical reactions, or add acetone to remove pollutants and refine aluminum continuously.
Finally, the most important and crucial step is to add other metal elements of different proportions to melt, and make aluminum alloy of various uses. Here, the recycling process of waste aluminum is finished.
Here friends may ask, that you also did not mention the process of adding rare earth elements ah? Adding rare earth elements is what we often do when we smell aluminum. The reason is that the various chlorides added in the smelting process can produce harmful substances, and the addition of rare earth elements is good to avoid this. As for rare earth elements, they are not a single element per se, but a collection of 17 elements that have similar properties, so they are collectively called rare earth elements.
For the recycling of aluminum, we can not underestimate this project. Let's start with this set of data. The energy consumption of recycling aluminum is only equal to 5% of the energy consumption of mining and casting aluminum, which is particularly critical today when energy is increasingly scarce.
Moreover, each ton of recycled aluminum produced by us will save at least 10 tons of water compared with the direct production of primary aluminum, and the environmental pollution level is only equivalent to 1/10 of the latter.
Mineral resources are not renewable, but we recycle them in another form, which is another way for us to live in harmony with nature. What do you think?