Recycling technology of used batteries

Lead batteries are large in size and highly toxic. Therefore, the recycling and utilization of lead batteries is the earliest among various batteries. Therefore, the process is relatively complete and continues to develop. In the waste battery recycling technology, sludge treatment is the key, and the sludge phase of the waste battery is PbSO4, PbO2, PbO, Pb, etc. Among them, PbO2 is an important component, accounting for 41%~46% and 24%~28% of the positive electrode filler and mixed filler, respectively. Therefore, the rehabilitation effect of PbO2 has an important influence on the entire rehabilitation skills. Rehabilitation techniques are divided into two types: fire therapy and wet therapy. PbSO4 and PbO, such as PbO2, were reduced and trained in lead in a metallurgical furnace. However, due to secondary SO2 and high temperature lead dust, high energy consumption and low utilization rate, it will gradually be selected. The wet process is a lead compound that converts PbO2 into a low-cost state by participating in the recovery agent under solution conditions. Many types of rehabilitation agents have been identified. At the same time, the method of recovering PbO2 from ferrous sulfate in sulfuric acid solution is more ambitious and has industrial application value. PbO2 is recovered from FeSO4 in sulfuric acid solution. The recovery process is as follows: PbO2 (solid) + 2FeSO4 (liquid) + 2H2SO4 (liquid) → PbSO4 (solid) + Fe2 (SO4) 3 (liquid) + 2H2O The recovery process is stable and fast , The metallic lead in the sludge can be completely converted, which is conducive to the recovery of PbO2: Pb (solid) + Fe2 (SO4) 3 (liquid) → PbSO4 (solid) + 2FeSO4 (liquid) Pb (solid) + PbO (solid) + 2H2SO4(liquid)→2PbSO4(solid)+2H2O can be used to prepare reclaiming agent from iron and steel pickling wastewater to treat the waste residue. With the development of handheld phones and electronic devices, nickel-metal hydride batteries and new lithium batteries have been used in many aspects in recent years. In Japan, the output of nickel-metal hydride batteries reached 18 million in 1992 and 70 million in 1993, accounting for nearly 50% of the market share in 2000. It is estimated that a large number of Ni-MH batteries will be used up in the near future. The positive and negative data of these spent nickel-metal hydride batteries contain many useful metals, such as nickel, cobalt and rare earths. Therefore, recycling of Ni-MH batteries is very beneficial, and regeneration technology is being actively developed. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: What is the principle of nuclear battery? Advantages and disadvantages of nuclear batteries