Environmental
Lead-acid battery recycling
Lead-acid batteries are secondary or rechargeable batteries used widely in cellular phones, computers etc. Lead-acid battery recycling starts in a hammer mill, where the battery is broken into pieces. The broken pieces are then placed into a vat, where the heavy materials like lead fall to the bottom and plastic floats. The plastic pieces are separated, washed, dried and melted to a liquid state. The molten plastic is put through an extruder that produces small plastic pellets of uniform size. These pellets are again used in the manufacturing of battery cases. The lead parts are heated in a smelting furnace. The molten lead is poured into ingot molds. The impurities are removed from the ingots and then the ingots are allowed to cool. The molds are then removed from ingots and remelted by manufactures for the production of new batteries. The sulphuric acid is neutralized into water. The wastewater treatment plant treats this water to meet clean water standards. recycling batteries helps other industries too. For example, sulphuric acid can also be converted to sodium sulphate, which is used in laundry detergent, glass and textile manufacturing.
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