Lead Recycling Solution
Lead Recycling Solution
Process Description
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This process adopts fully automatic waste lead-acid battery crushing and sorting production line, which can effectively sort out various materials of different weight and nature after crushing, with high automation, high production efficiency and good safety performance; The system has full screen monitoring and automatic alarm; good environmental protection effect, close circulation of acid, no external emission, and acid mist collected centrally and discharged by cleaning and filtering treatment to meet the environmental standard.
The smelting workshop adopts oxygen-enriched side-blowing furnace process for smelting, which can handle various materials such as lead paste, lead ore, lead slag, lead-containing dust and scrap, etc. As oxygen-rich air is blown into the side-blown furnace as the reaction condition, the oxygen-rich air stirs the slag vigorously, the smelting reaction occurs fully and quickly, and the amount of air needed to be blown into the reaction is less, which makes the SO2 concentration in the flue gas after the reaction high enough to reach the content requirement of sulfuric acid production.,which not only achieves the standard emission of SO2 in the flue gas, but also increases the economic income by adding sulfuric acid as by-product..
The oxygen-enriched side-blown furnace recycling process adopts the principle of molten pool melting and adopts intelligent batching system to realize scientific raw material proportioning, so that the slag and crude lead can be separated and recycled with high efficiency, while the slag as by-product, after water quenching, directly forms solid waste glass, which can be used as material for building materials such as cement.
After multi-step treatment such as waste heat boiler, electric dust collection and ionic liquid purification, the tail gas produced by smelting, its indexes such as particulate matter content, SO2 content and NOx content can reach the emission standards of many countries, and the system can also be designed according to the local environmental protection requirements. Lead processing plants are essential for industries that rely on lead, such as battery manufacturing, automotive, construction, and electronics. They play a critical role in ensuring the supply of high-quality lead for various applications while adhering to environmental and safety regulations.
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Electro-refining system is designed to recovery the precious metal from anode slime and get lead reach purity over 99.99%.
Primary and Secondary Smelting Operations
Lead processing and smelting plants work with both primary and secondary lead. Primary lead is mined, separated from ore, and refined into various products, whereas secondary lead is recovered from used objects, such as used lead-acid batteries, for reuse in other products. Smelting is a key process in lead product production, and involves heating lead ore or recovered lead with chemical reducing agents.
Both primary and secondary smelting processes can be responsible for releasing large amounts of lead contamination into the surrounding environment.
Primary Smelting
The primary smelting process involves separating lead from ore using heat and reducing or purifying agents such as coke and charcoal. When lead ore is mined, it must undergo several different processes in order to be turned into usable or metallurgical lead material. Lead dust and smoke can be released during all of these processes, and slag contaminated with lead particles may be left over after smelting.
Secondary Smelting
Secondary smelting of lead is similar to primary smelting, but does not require the initial sintering process. Once lead is recovered from used materials, it is placed into a furnace where it is heated with coke or charcoal in order to isolate the lead from other compounds.
Like primary lead smelting, the processing of secondary lead can also produce lead dust and toxic slag. If smelting plants and equipment are not properly constructed to minimize the release of pollutants, lead toxins can often enter the surrounding environment and contaminate soil, water, and food.
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