The main purpose of electrolytic lead: manufacturing a battery grid, a cable jacket, white lead, red lead, gasoline explosion protection, alloys, bullet, the nuclear reactor, a blown fuse, metallurgical and chemical raw materials, anti-corrosion lining acid, atomic reactors, X-rays Protective layer and protective screen, etc., used in military, atomic energy technology, metallurgy, chemical, electronics, light industry, pesticide, medicine, petroleum and other departments. Electrolytic lead smelting process Lead is the best carrier white silver metallurgy production: general collecting lead to the recovery of gold and silver are more than 95%, the recovery of gold is thus directly related to the production of lead status. About 80% of the original crude lead in the world is produced by the traditional sintering blast furnace smelting process. The traditional method technology is mature, more perfect and reliable. The shortcoming is that during the sintering process of desulfurization block, the SO 2 concentration of the sintering flue gas is low, and the recovery and utilization of sulfur is still difficult. The blast furnace smelting requires more expensive metallurgical coke . In order to solve the above problems, metallurgists conducted research on new lead smelting processes. Since the 1980s, new methods of lead smelting such as QSL, flash smelting, TBRC converter top blowing, Kiefsethan and Isa smelting have emerged. Among them, the QSL method is a new direct lead smelting process developed by the German Lurgi company in the 1970s. Although Canada, South Korea and China have purchased this patent to build a factory, the production effect is not satisfactory; the flash smelting method has not yet achieved industrial production; The TBRC method was created by the Swedish company Boliton, but the operation of this method is intermittent and the lining is severely corroded; the Kufsett method was successfully researched by the former Soviet Union Institute of Nonferrous Metals, and several manufacturers have now realized industrial production. It is a new lead-smelting process with advanced indicators and mature technology. However, the investment in this method is large, and only when it is used in factories with large production scales can the full benefit be realized. The Isa smelting technology is based on the injection of oxygen into the melt from the siro immersion lance inserted above. A vortex molten pool is generated to allow a strong oxidation reaction or a reduction reaction to occur rapidly. In the first stage, the high-lead slag produced by the smelting furnace is sent to the reduction furnace through the launder, and the flue gas produced by the oxidative desulfurization is sent to the acid-making system after being dusted. In the second stage reduction furnace, the produced crude lead and waste slag are continuously discharged from the discharge port and separated in the conventional front bed, and the produced flue gas is discharged by the chimney after being subjected to dust removal treatment. Isafa smelting process. The process is advanced, the adaptability of raw materials is large, the production scale can be large or small, relatively flexible, advanced indicators, high concentration of SO 2 flue gas, can solve the problem of flue gas pollution in the production process; at the same time, the smelting process is strengthened, gold and silver capture The collection rate is high, the waste heat is utilized well, and the energy consumption is low. It not only adapts to the rebuilding requirements of lead silver smelting in 308 factory, but also can promote the silver-lead metallurgical production and technological advancement in China. Therefore, it is recommended to introduce Asafa as the first plan for the crude lead smelting production process of this project. Traditional blast sintering - blast furnace method has some difficulties in the acid production of flue gas, but in recent years, the expansion and expansion project of large-scale lead plants such as Zhuzhou Smelter, Shenyang Smelter, and Jiyuan Smelter in China still adopt this method. It is because it has the advantages of fast construction, production, and fast production. The crude lead refining process has two methods: fire method and electrolysis method. In general, good separation of electrolysis of silver, gold, bismuth and antimony, a metal of high recovery of lead, silver, good working conditions, a high degree of mechanization and automation. The disadvantage of the electrolysis method is that the capital investment is higher than the fire method. The use of the fire method requires the treatment of a large amount of intermediate products, and the energy consumption is high, resulting in a higher production cost than the electrolysis method. In view of the fact that the crude lead in this project contains more metals such as silver and antimony. The conventional method for treating lead anode mud is to use fire method-electrolysis process to obtain gold and silver, slag for reduction smelting, refining and fine smelting, etc. The process is simple, the technology is mature, the workers are easy to operate, but the recovery rate of valuable metals is not high. The bismuth and lead are volatilized into the soot in the form of oxides, which is not only inconvenient for comprehensive recovery, but also causes a second pollution. 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