Zinc is a blue-white or silvery metal found in the earth’s crust. Zinc metal is the fourth most consumed metal in the world after iron, aluminum and copper. Zinc is mostly found in nature as sulfur. Pure zinc is very soft, brittle and brittle at normal temperature and breaks easily with a hammer. The most important use of this metal is in the galvanizing industry and the production of alloys such as brass. Lead metal is also a natural element that is found in small amounts in the earth’s crust. Lead is a bluish shiny metal, this metal is very soft, flexible and a relatively weak conductor and very resistant to corrosion, but it is toxic to humans. After Turkey, Iran is the second largest producing country in the lead and zinc value chain. Iran owns about 5% of the world’s lead and zinc reserves. The main contribution of lead metal consumption is in the manufacture of lead-acid batteries for cars. Also, lead sheets are used in the coating of chemical treatment tubs, sound insulation, radiation absorption and in the construction industry to prevent water penetration in the roofs. The main contribution of the use of overlapping metal is in the field of galvanizing metal products to prevent metal corrosion. For this reason, the demand for zinc has a relatively high correlation with the volume of consumption of metals, especially steel, and the volume of civil and construction projects. Zinc is combined with copper (in the form of brass) and with other metals to form materials used in automobiles, electrical components, and household appliances. This metal is also used in the production of zinc oxide, which is used in the production of rubber and as a skin protection ointment.
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