May I ask, what is the role of the heavy metal lead and what can it be used for?

1, the role: lead is the raw material for the manufacture of batteries, cables, bullets and ammunition, as well as an additive for gasoline.

2, used to do:

Lead-acid batteries

Lead-acid batteries (referred to as lead-acid batteries) from the inception of the history of more than 150 years, because of its low price, mature technology, reliable performance and other advantages, it has become the current chemical power supply in the largest production, the most widely used secondary batteries, for a long time has been widely used in the production of social life in a variety of occasions.

Cable sheath

Sheath materials are mainly chemical lead, lead alloy containing 1% antimony or arsenic, as well as lead alloy containing 0.03% calcium or hoof, with lead for cable sheath is mainly moisture-proof, corrosion-resistant, as well as shielding and support. Cable industry with lead is mainly power cables and communication cables, although most of the domestic power communication cables have been replaced by other materials such as plastic lead sheath, but there are still a small number of cables using lead sheath.

Chemical products

At present, there are quite a lot of lead compounds used in chemical industry. Only a few widely used products are introduced here. Lead oxide is widely used in the paste mixture of lead-acid battery grids as well as in cement, glass, ceramics, and can be used to prepare other lead compounds; red Dan is an important anti-rust paint, used as a primer and inner paint layer to prevent steel rust.

Solder

Lead alloy solder that is usually referred to as soft brazing solder, of which the lead-tin alloy solder in all the welding materials in the most widely used, the use of a long history. It has a low melting point, can not damage the premise of heat-sensitive components, with a simple heating method, more ideal to connect most metals.

Extended information:

Harmful effects of lead

Lead is one of the three major heavy metal pollutants, and it is a heavy metal element that is a serious danger to human health. The ideal amount of lead in the human body is zero.

The human body brings lead into the human body through ingesting food, drinking tap water, etc. 90% of the lead that enters the human body is stored in the bones, and 10% is distributed to all tissues and organs of the body along with the flow of the blood circulation, affecting the red blood cells and the function of the brain, kidney, and the nervous system, especially in infants and young children after absorbing the lead, more than 30% of the lead will be retained in the body, which will affect the growth of infants and young children and their intellectual development.

Baidu Encyclopedia - Lead