â– Discover the history
Lead is one of the metals that humans extracted earlier. In 3,000 BC, Egypt used lead-made figures. In the Shang Dynasty (16-11 BC), lead was used for bronze ware. The lead in the Western Zhou Dynasty (11th century BC - 771 BC) was 99.75% lead. The scale of lead production in China was quite small at the beginning of the liberation and it has now reached a relatively high level.
â– The nature of lead
The surface of lead in air is easily oxidized to lead film, or basic lead carbonate. Lead-based amphoteric metal can react with hydrochloric acid and sulfuric acid to form salts.
â– Lead resources
Lead minerals are divided into primary and secondary minerals. There are 42 kinds of lead minerals and lead-containing minerals that have been discovered in China, 11 of which are of industrial significance. Commonly there are the following types: galena, sulphur-lead, brittle sulphur, wheel ore and lead , lead and antimony, chrome lead, molybdenum lead.
â– Preparation of lead
The raw material for lead smelting is mainly lead sulfide ore, and the ore grade produced is generally less than 3%. It is necessary to obtain beryllite concentrate after beneficiation and then conduct smelting. The methods include lead smelting of lead sulfide, crude lead refining, new lead smelting, and lead regeneration.
â– Use of lead
Lead is widely used in various industries and is used in a large number of manufacturing batteries. Lead plates and lead pipes are used as lining protection equipment in the acid production industry and the metallurgical industry. Cable covers and fuses are used in the electrical industry. Lead alloys containing tin and antimony are used for printing type, lead-tin alloys are used for the manufacture of fusible lead electrodes, and lead plates and lead-plated tinplates are used in the construction industry. Lead has a good absorption of X-rays and gamma rays and is widely used as a protective material for X-ray machines and atomic energy devices. The addition of tetraethyl lead to gasoline increases its octane number. Lead compounds used as pigments include lead white, lead red, lead yellow, and litharge. Salt-based lead sulfate, lead phosphate and lead stearate are used as stabilizers for polyvinyl chloride. Also used in the rubber, glass, ceramics industry, lead acetate for the pharmaceutical sector.
Lead is one of the metals that humans extracted earlier. In 3,000 BC, Egypt used lead-made figures. In the Shang Dynasty (16-11 BC), lead was used for bronze ware. The lead in the Western Zhou Dynasty (11th century BC - 771 BC) was 99.75% lead. The scale of lead production in China was quite small at the beginning of the liberation and it has now reached a relatively high level.
â– The nature of lead
The surface of lead in air is easily oxidized to lead film, or basic lead carbonate. Lead-based amphoteric metal can react with hydrochloric acid and sulfuric acid to form salts.
â– Lead resources
Lead minerals are divided into primary and secondary minerals. There are 42 kinds of lead minerals and lead-containing minerals that have been discovered in China, 11 of which are of industrial significance. Commonly there are the following types: galena, sulphur-lead, brittle sulphur, wheel ore and lead , lead and antimony, chrome lead, molybdenum lead.
â– Preparation of lead
The raw material for lead smelting is mainly lead sulfide ore, and the ore grade produced is generally less than 3%. It is necessary to obtain beryllite concentrate after beneficiation and then conduct smelting. The methods include lead smelting of lead sulfide, crude lead refining, new lead smelting, and lead regeneration.
â– Use of lead
Lead is widely used in various industries and is used in a large number of manufacturing batteries. Lead plates and lead pipes are used as lining protection equipment in the acid production industry and the metallurgical industry. Cable covers and fuses are used in the electrical industry. Lead alloys containing tin and antimony are used for printing type, lead-tin alloys are used for the manufacture of fusible lead electrodes, and lead plates and lead-plated tinplates are used in the construction industry. Lead has a good absorption of X-rays and gamma rays and is widely used as a protective material for X-ray machines and atomic energy devices. The addition of tetraethyl lead to gasoline increases its octane number. Lead compounds used as pigments include lead white, lead red, lead yellow, and litharge. Salt-based lead sulfate, lead phosphate and lead stearate are used as stabilizers for polyvinyl chloride. Also used in the rubber, glass, ceramics industry, lead acetate for the pharmaceutical sector.
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