Tin - one of the first metals known to mankind since ancient times.With this metal since the opening of its associated development of human society.
Tin, along with silver, copper, gold, mercury, lead and iron became known already in prehistoric times.Archaeological excavations and other historical findings suggest that people learned how to get the tin several thousand years ago.Because it already at that time were made ornaments and utensils, but the metal was quite expensive.Mention of it was even in the first copy of the Old Testament.
Nowadays, tin is known as a pure silver-white metal.Most often it occurs in the form of oxide compounds (tin stone).The melting point of tin metal is considered to be among the lowest thanks to this material is easy to smelt tin ore.Tin - Plastic soft metal is well processed (forging, rolling, machining, etc.), Has a fairly high specific gravity and density.It has low thermal and electrical conductivity, little susceptible to weathering.
At low temperatures, the metal is not only change color, but also prone to the phenomenon of "tin pest".This results in the destruction of tin products.So, in 1812, under the influence of Russian frosts at French soldiers destroyed pewter buttons.Given that the melting point of tin is low enough for the smelting furnace it is usually simple in design.
Tin - a rare metal.Smelted from the ore it before, which is located directly in the upper crust.In today's environment of virtually no resources, so the technology of production of tin is quite complicated and time-consuming.
all placers and tin-containing ore beneficiation process are then directed to concentrate kilns and only then - in the melting department.When heated, the metal begins to melt.The melting point of tin is in the range 232 degrees.During melting, using fluxes, slag and various additives to obtain the desired variety and quality of the material.
range wide enough use of tin, the element widely used in various industries.By its importance and usefulness, he became a strategic metal, because it allows the formation of alloys with different materials, also very easy to process.And, of course, plays an important role and a low melting point of tin.
Tin is non-toxic, corrosion-resistant material.Iizobretenny last century method of manufacture of tinplate (coated sheet metal layer of tin) to make it possible to secure containers for food conservation.Use of tinned iron has made a revolution in the food industry.
wetting ability of other metals and the low melting point of lead and tin to produce enabled fusible alloy (solder).The use of these alloys allows to connect different structural components and spare parts with a hermetic seal.
tin ability to perform the role of the protective layer used in the nuclear industry.Further, in the glass industry today it is used for polishing glass.For this purpose, the liquid is poured from the furnace in the mass of glass container with the molten tin.Pour tin at slow cooling starts after passing below its melting point.The resulting mixture was in the form of tape initially comes into the kiln and then cutting portion.
great demand at all times uses an alloy of tin and copper - bronza.V old days before the iron was out of it manufactured various products until the weapon.When people learned about the strength and wear-resistant qualities of bronze, it was used for the manufacture of bearings operating in difficult conditions with heavy loads.
Today it is difficult to find a sphere of human activity, wherever applied tin in pure form or in alloys.
