suggest some ways to utilise discarded metallic objects?
Answers
Answer:
Metal Recycling
Metals are essential, versatile and can be used in a number of ways. Metals can be used for industrial purposes such as the manufacture of trucks, cars, airplanes, ships, and railways. They can also be used to manufacture domestic items such as cutlery, crockery and even in packaging. The good thing about metal recycling is that metal can be recycled over and over without altering its properties.
The most common recyclable metals include aluminum and steel. The other metals, for example, silver, copper, brass and gold, are so valuable that they are rarely thrown away to be collected for recycling. Therefore, they do not create a waste disposal crisis or problem.
The Metal Recycling Process
The metal recycling process is similar to the usual recycling process. The metals are first sorted on the basis or their properties. It is, however, important to have a basic understanding or knowledge about metals. This will help in recycling them and keeping a green environment. The metal recycling process follows the following steps.
1. Collection
This is the first and most important step in metal recycling. It simply involves collecting all materials that are made of metals. This process should be organized in such a way that there should be containers specifically designed to collect metals.
Some people and business persons have established scrap yards whereby people are encouraged to collect different metals, take them there and be paid for what they have collected. Different metals cost differently at the yards. The scrap metal yards are used as collecting centers for the metals.
2. Sorting
Once the metals have been collected, the next important step is to sort the metals. This involves separating what can be recycled form what is non-recyclable. It is essential to point out that the quality of metal recycled is very important.
A high quality recycled product or item can only be created if the original materials used in the recycling process are of good quality. This, therefore, calls for a strict quality checkup during the sorting process.
The general rule is that a product needs to be at least 50 percent metal. Even if that metal is surrounded by other materials like plastic, it’s worth recycling if it’s made mostly out of metal.
You may have products with only a small amount of metal, but it’s easy to remove, separate the metal. For example, a plastic three-ring binder is not scrapped metal, but the metal rings can be easily removed and used.
Scrap metal is classified as either ferrous (containing iron, such as steel) and nonferrous (everything else). The ways to identify whether the metal is ferrous or nonferrous is with a magnet. As ferrous metals contain iron, they stick to a magnet; nonferrous metals don’t and are easily pulled out of the mixed waste stream.
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These days, in large recycling facilities, the use of sensors to identify metals through infra-red scanning and x-ray has become popular. Three common categories of metal sensing processes include biotechnology, hydrometallurgy, and pyrometallurgy. The use of these technologies can effectively improve metal recovery rates.
3. Processing
After sorting, the next step is to compact or squeeze the metal. All the recycled materials are squeezed and squashed using machines so that they do not occupy so much space in the conveyor belts.
4. Shredding
After the crushing and breaking of the metal, the shredding process starts. The metals are broken down into tiny pieces or sheets to allow further processing. The small pieces have a large surface to volume ratio that can be melted using less energy as compared to when they are in large pieces of metal. Normally, steel is changed into steel blocks while, on the other hand, aluminum is converted into sheets.
5. Melting and Purification
Melting of the scrap metal takes place in a large furnace. Each metal is taken to a furnace that is specifically designed to melt that particular metal based on its specific properties. The melting process uses a considerable amount of energy. However, the energy required for melting recycled metal is less compared to the energy required to make metal from its raw material.
The furnace is heated to appropriate degrees capable of melting the particular metal. Melting can take minutes or hours depending on how big the furnace is, the volume of metal placed in the furnace and the heat degree of the furnace.
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Answer:
The Metal Recycling Process
- The Metal Recycling ProcessCollection. This is the first and most important step in metal recycling. ...
- The Metal Recycling ProcessCollection. This is the first and most important step in metal recycling. ...Sorting. Once the metals have been collected, the next important step is to sort the metals. ...
- The Metal Recycling ProcessCollection. This is the first and most important step in metal recycling. ...Sorting. Once the metals have been collected, the next important step is to sort the metals. ...Processing. ...
- The Metal Recycling ProcessCollection. This is the first and most important step in metal recycling. ...Sorting. Once the metals have been collected, the next important step is to sort the metals. ...Processing. ...Shredding. ...
- The Metal Recycling ProcessCollection. This is the first and most important step in metal recycling. ...Sorting. Once the metals have been collected, the next important step is to sort the metals. ...Processing. ...Shredding. ...Melting and Purification. ...
- The Metal Recycling ProcessCollection. This is the first and most important step in metal recycling. ...Sorting. Once the metals have been collected, the next important step is to sort the metals. ...Processing. ...Shredding. ...Melting and Purification. ...Purification. ...
- The Metal Recycling ProcessCollection. This is the first and most important step in metal recycling. ...Sorting. Once the metals have been collected, the next important step is to sort the metals. ...Processing. ...Shredding. ...Melting and Purification. ...Purification. ...Melting and Solidifying of the Metal. ...
- The Metal Recycling ProcessCollection. This is the first and most important step in metal recycling. ...Sorting. Once the metals have been collected, the next important step is to sort the metals. ...Processing. ...Shredding. ...Melting and Purification. ...Purification. ...Melting and Solidifying of the Metal. ...Transportation of the Metal Bars.