How is the cupola lead smelting furnace smelted?
After the lead-acid battery is disassembled by the dismantling machine, the lead obtained is not very pure and needs to be further processed. At this time, it needs to be smelted with a cupola. Cupola is an indispensable equipment for smelting lead. Everyone is curious about its refining process. Let's talk about how it is smelted:
1. First put a certain amount of foundry coke into the furnace as bottom coke.
2. After ignition, add the bottom coke to the specified height, from the tuyere to the top surface of the bottom coke is the bottom coke height, and then according to the melting rate of the furnace, put the prepared limestone, metal charge and layer coke in batches from the feeding port in order. join in.
3. At this time, the air in the blast furnace undergoes a combustion reaction with the bottom coke, and the generated high-temperature furnace gas flows upward to heat the charge and melt the first batch of metal charge on the top surface of the bottom coke, and the molten iron droplets fall to the ground. During the process of the hearth, it is further heated by the high temperature furnace gas and the hot coke, a process called superheating.
4. The lead smelting furnace carries out three important processes of bottom coke combustion, heat transfer and metallurgical reaction at the same time. According to the different physical and chemical reactions, the lead smelting furnace takes the combustion area as the core and is divided into:
5. Preheating zone, melting zone, reducing zone, oxidation zone and hearth etc. Due to the effect of furnace gas, coke and slag, the molten metal composition also changes to a certain extent. Among the five major elements in lead smelting, carbon and sulfur generally increase, silicon and manganese generally burn out, and phosphorus does not change much. .
Through the above steps, the recovered lead can be smelted to obtain pure lead ingots, which greatly improves the utilization rate of lead-acid battery recycling. If you are interested in lead-acid battery recycling or cupola lead smelting, please feel free to Message us for consultation.
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