What are the recycling methods for used batteries?

1. Solidification is buried deep and stored in waste mines. For example, a French factory extracts nickel and cadmium from them, and then uses nickel for steelmaking, and cadmium is reused for processing batteries. The rest of the various types of waste batteries are generally transported to special toxic and hazardous waste landfills, but this approach is not only too expensive but also wasteful, because there are still many useful materials that can be used as raw materials. 2. Recycling (1) Heat treatment There are two factories in Switzerland that specialize in the production and utilization of used batteries. The method adopted by Batllek is to grind the used batteries and send them to the furnace for heating. At this time, the volatilized mercury can be extracted and the temperature is even higher. Zinc also evaporates at high temperatures, and it is also a precious metal. Iron and manganese are fused to become a ferromanganese alloy required for steelmaking. The plant can produce 2,000 tons of waste batteries a year, and obtain 780 tons of manganese-iron alloy, 400 tons of zinc alloy and 3 tons of mercury. The other factory extracts iron directly from batteries and sells metal mixtures such as manganese oxide, zinc oxide, copper oxide, and nickel oxide as metal scraps. However, the heat treatment method is more expensive, and Switzerland also stipulates that each battery purchaser shall be charged a small amount of special charges for the production of waste batteries. (2) Wet treatment A wet treatment device is being built in the suburbs of Magdeburg, where all types of storage batteries except batteries are dissolved in sulfuric acid, and then various metals are extracted from the solution with the help of ionic resin. The raw material is purer than the heat treatment method, so the price is higher on the market, and 95% of the various substances contained in the battery can be extracted. Wet processing can save the sorting link (because sorting is manual operation, it will increase the cost). The annual production capacity of the Magdeburg facility can reach 7,500 tons. Although its cost is slightly higher than that of landfill, the precious raw materials will not be discarded and will not pollute the environment. (3) Vacuum heat treatment method The vacuum heat treatment method developed by German Alter Company is cheaper. However, it is necessary to sort out the nickel-cadmium battery from the waste battery. The waste battery is heated in a vacuum, and the mercury evaporates quickly. Recover, then grind the remaining raw materials, extract metallic iron with a magnet, and then extract nickel and manganese from the remaining powder. The cost of producing one ton of waste batteries is less than 1,500 marks. 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: What types of fuel-powered batteries are there?