Lead (Pb) is a high-density, soft blue-gray metal with a melting point of 327℃ and a boiling point of 1740℃. When the temperature exceeds 400℃, a large amount of lead vapor escapes and is rapidly oxidized into lead oxide smoke in the air.

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Lead is a raw material for making batteries, cables, bullets and ammunition, and also an additive for gasoline. Lead compounds are used as raw materials for pigments, glass, plastics and rubber. Metal lead is widely used in manufacturing chemical and metallurgical equipment because of its excellent acid and alkali corrosion resistance.

Lead alloys are used as bearings, movable type gold and solder. In addition, lead has opened up some new uses. For example, it can be used as a stabilizer of asphalt to prolong the service life of pavement; It is used to manufacture nuclear power plant shielding and nuclear waste storage tanks, high-power storage batteries for power sector load regulation, magnetohydrodynamic devices, etc.

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