"Tin (Sn) is the chemical element with atomic number 50 in the periodic table of elements. Tin can be white (the most common) or gray. White tin is metallic and conductive of electricity. Gray tin is a non-metallic powder that is semiconductor. It is a very malleable metal, for this reason it is possible to create the so-called tinfoil, a sheet less than one thousandth of a centimeter thick. It is resistant to corrosion through passivation and for this reason it is used to cover other metals protecting them from corrosion. It is a metal resistant to acids and the elements. It is present in many alloys. Its fusion occurs at 231.9 ° C and has a density of 7365 kg / m3 Something very characteristic of tin is the so-called tin plague. As it is very sensitive to low temperatures, with exposure to these, the metal becomes ill. It begins to acquire a gray color, its volume increases and it begins to crumble, thus often turning into powder. Tin-based alloys (white metals) generally contain lead, copper, and antimony The most common tin alloys are as follows: Bronze: (tin + copper) Soft solder: (tin + lead) Pewter: (Tin + lead + copper + antimony): differs from bronze for having 85-90% tin and the presence of antimony and lead. Britannia metal: (tin with antimony and copper) The main ore (mineral from which the element is extracted) of tin is cassiterite where it is found as oxide. Tin is extracted from the deposit by a method called a dredge. Then certain operations are carried out to obtain the tin concentrate found in minerals such as cassiterite, stannite or thealite. The cassiterite is crushed and ground in suitable mills and then placed in a tank with water that is then stirred. The tin ore remains at the bottom and thus the other matters are separated. After this, it is put in a furnace where the tin sulphides that may be in the mineral are oxidized to transform them into oxides. The tin ore is put into a furnace where the tin oxide is transformed into tin, the latter remaining in the lower part and the slag in the upper part. To get 99% tin, it must be subjected to an electrolytic process. Tin can be recycled in both scrap yards and authorized waste managers. It can be purchased in different formats and its final destination is the foundry. Tin is used as a compound in different industries or coats other metals, but it is produced in large quantities and is not recycled properly. This creates a waste of material. This metal can be used en masse and give it a second life by recycling it. This way, it would help the environment and not end up in the trash. "
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