Lead in industrial production is inhaled into human body in the form of lead dust (smoke), and occupational lead poisoning is mostly chronic poisoning, with comprehensive symptoms of nervous system, digestive system and blood system in clinic. The main manifestations of nervous system are neurasthenia, polyneuropathy and encephalopathy. The crystal structure of lead is cubic lattice. Lead has high density, low hardness, low melting point, high boiling point, poor electrical and thermal conductivity and can absorb radiation.
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Application of lead:
1, lead-acid battery
Lead-acid battery (referred to as lead-acid battery) has become the largest and most widely used secondary battery in chemical power supply because of its advantages of low price, mature technology and reliable performance, and has been widely used in many occasions of social production and life for a long time.
2. Cable sheath
The sheath material is mainly chemical lead, lead alloy containing 1% antimony or arsenic, and lead alloy containing 0.03% calcium or hoof. Using lead as cable sheath mainly plays the role of moisture-proof, anti-corrosion and shielding support.
3. Chemical products
There are quite a few lead compounds used in the chemical industry. Here are only a few widely used products. Lead oxide is widely used in the paste mixture of lead-acid battery grid, cement, glass and ceramics, and can be used to prepare other lead compounds.
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